GB2640270A - Fluid delivery device - Google Patents

Abstract

A handheld fluid delivery device comprising a mid-housing 30 with at least one reservoir 31, 32, each reservoir being configured to store a predetermined fluid; a tip portion 40 comprising an outlet 41; and at least one fluid pathway extending between the or each respective reservoir and the outlet of the tip portion. The device further comprises an actuator 10 in communication with at least one reservoir and configured in use to generate flow of predetermined fluid along one or more selected fluid pathway(s) into or out of the or each selected at least one reservoir. The device further comprises a controller 20 configured in use to select and/or selectively control the flow of fluid to or from at least one reservoir as affected by the manually operable actuator. The controller is configured in use to select the predetermined at least one reservoir for delivery of a fluid therefrom or thereto, and/or to control the direction and/or rate of flow of the predetermined fluid between the predetermined at least one reservoir. A method of refilling and manufacturing the device is also provided.

Description

FLUID DELIVERY DEVICE

The present invention relates to a manually operable fluid delivery device configured to store and/or selectively release one or more fluids, from a plurality of fluids, to a predetermined location on a user. The present invention further relates to a method for the delivery of selected one or more fluid(s) from one or more stored fluid(s) within a manually operable fluid delivery device to a predetermined location on a user.

BACKGROUND OF INVENTION

Conventional pharmaceuticals provided in solid pill form are easy and efficient to manufacture and have performance advantages such as stability and long shelf life. However, solid pill form pharmaceuticals administered orally must undergo intestinal absorption within the gastrointestinal system which can lead to a dramatic decrease in the effectiveness of the drug due to low bioavailability and diminished efficacy. Bioavailability refers to the amount of drug being provided to its intended biological destination or target. Drug development and formulation therefore takes into consideration pharmacokinetic properties and gastrointestinal physiology in order to improve drug absorption. Orally administered solid pill form pharmaceuticals are configured for slow release by coating with compositions comprising phthalates (which are considered to be toxic to the human system) and artificial sweeteners such as sorbitol and saccharin. Repeated administration of the solid pill form pharmaceuticals, for example daily, can result in the user absorbing increased levels of artificial sweeteners and phthalates which can become dangerous over time.

Dysphagia is a disorder resulting in a user having difficulty with swallowing which can be caused by a number of triggers including fear, pain or other cognitive, anatomical or physiological problem. Anxiety associated with the need to orally administer drugs (also known as 'pill anxiety') has increased in recent years due to the increased use of solid pill form pharmaceuticals. For example, small children are known to have difficulty swallowing solid pill form pharmaceuticals for a number of reasons (including having a strong gag reflex or an inability to swallow on demand) which can be challenging and distressing for both child and parent. Furthermore, elderly users and stroke patients can also have difficulty swallowing solid pill form pharmaceuticals which can give rise to potential choking issues and may lead to ulcers and damaged tissue.

There is therefore a need for an improved delivery device for administration of pharmaceuticals to a user with improved bioavailability, improved efficiency, and improved ease of administration.

STATEMENT OF INVENTION

According to a first aspect of the present invention, there is provided a manually operable, handheld fluid delivery device configured in use to store and/or release one or more fluid(s) on selection by a user to a predetermined location, the device comprising: a mid housing comprising: at least one reservoir, each reservoir being configured in use to store a predetermined fluid; a tip portion comprising an outlet; and at least one fluid pathway extending between the or each respective reservoir and the outlet of the tip portion; an actuator in communication with the at least one reservoir and configured in use to generate flow of predetermined fluid along one or more selected fluid pathway(s) into or out of the or each selected at least one reservoir; and a controller configured in use to select and/or selectively control the flow of fluid to or from at least one reservoir as effected by the manually operable actuator, in which the controller is configured in use to select the predetermined at least one reservoir for delivery of a fluid therefrom or thereto, and/or to control the direction and/or rate of flow of the predetermined fluid between the predetermined at least one reservoir and the outlet of the tip portion.

The term "fluid" is used herein to refer to liquid, gas, viscous cream and/or powder, or any combination thereof. Preferably, the dispensing fluid comprises a drug or supplement (for example a pharmaceutical drug) in any suitable form including liquid, gas, viscous cream and/or powder, or any combination thereof.

The delivery device preferably comprises a plurality of reservoirs, and a plurality of fluid pathways. Each fluid pathway preferably extends between the outlet of the tip portion and a corresponding reservoir.

A plurality of different fluids may be stored within the mid housing. Each fluid may be stored within a separate reservoir and in communication with the outlet via a separate fluid pathway.

The delivery device of the present invention therefore enables a plurality of fluids to be stored and efficiently and conveniently delivered to a predetermined location on a user.

The controller is preferably configured in use to independently select and/or control the flow of fluid to or from a plurality of reservoirs.

The delivery device of the present invention is configured in use to enable a user to independently select the required one or more fluid(s) stored within the reservoir(s) of the mid housing and to control the administration of the selected fluid(s) either for independent administration or for combined administration. The present invention therefore enables multiple fluids to be stored and administered (independently or in combination) from a single device.

The controller is preferably configured in use to selectively apply and/or direct the force produced by the actuator that contains a different fluid (actuator fluid) for propulsion to one or more predetermined reservoir(s) to generate flow of predetermined fluid along one or more selected fluid pathway(s) into or out of the or each selected at least one reservoir.

The tip portion may be configured to provide cuts or openings in an anatomy of a patient. These include for example nasal, sublingual, buccal, otic routes and/or openings.

The actuator may be incorporated into the mid housing. For example, the mid housing preferably comprises a first end located at or adjacent the reservoir(s) entry and an opposed second end located at the tip portion. When incorporated into the mid housing the actuator chamber is made into the mid housing and actuator is preferably located at or adjacent the second end of the mid housing. An actuator may also be incorporated away from the mid housing.

In one embodiment, the mid housing comprises substantially V-shaped and/or U-shaped flow paths extending between reservoir(s) and the tip portion and as such the actuator and the tip portion may be located at or adjacent a second end of the mid housing.

In one embodiment, the mid housing comprises a simpler linear shape flow paths extending between reservoir(s) and the tip portion and as such the actuator may be located at or adjacent the first end of the mid housing whilst the tip portion is located at the opposite second end.

The actuator is preferably a manually operable actuator. The actuator is preferably a pressure responsive actuator. The actuator preferably defines an actuator chamber for containing fluid (for example actuator fluid, such as for example air, gas, liquid, or any combination thereof) for pressurising, on use of the actuator, to provide a positive driving force for fluid flow into or out of a corresponding reservoir. The actuator preferably comprises air.

Actuator fluid preferably extends into actuator chamber, controller bridge chamber and reservoir(s) or part reservoir(s) depending on quantity of dispensing fluid inside of a reservoir(s).

The actuator may comprise high pressure fluid or a propellant. For example, the actuator may comprise a squeeze pump type, for example a squeeze air bulb. This may comprise of different shapes and sizes preferably ergonomically designed.

The actuator instead of fluid may comprise of providing a vacuum.

The controller is preferably configured in use to selectively apply and/or direct propulsion force produced by movement of the fluid within the actuator chamber, on actuation of the actuator, to one or more predetermined reservoir(s) to generate flow of predetermined fluid along one or more fluid pathways and into or out of the reservoir(s).

The controller is preferably located between the actuator chamber and the reservoir(s). Preferably, the or each reservoir comprises a first end and an opposed second end defining an opening for fluid communication with the fluid path. In one embodiment, the controller is preferably located at or adjacent the first end of the reservoir(s). Preferably, each reservoir is aligned with (and preferably spaced apart from) further reservoir(s). Preferably, the first end of each reservoir is located adjacent the controller.

The controller bridge chamber is preferably configured to accommodate the actuator and its chamber, and fluid flow path inside the housing to allow for communication between them and a fluid pathway to exist for administration out of the device to successfully occur.

The actuator and actuator chamber may be located onto the mid housing or away from which can affect the controller bridge chamber configuration housed inside for a fluid pathway to exist.

When an actuator and corresponding actuator chamber is located on the mid housing such examples of configurations or controller bridge chambers that may exist are an inwardly curved cavity to relay the actuator fluid and propulsion from actuator to reservoir(s) therefore having at least two ends existing.

When the actuator and corresponding actuator chamber is located away from the mid housing more simple configurations of controller bridge chamber can exist such as linear chamber and singular spaced open chamber types due to not having to accommodate the actuator chamber seated inside the mid housing and connecting lower mid housing first end.

A manual operable actuator may provide for at least one squeeze point. The location of the at least squeeze point will depend on the requirements for the device, including for example consideration of the type of end user. For example, elderly users will require an actuator with easy operation in order to correct the required force (i.e pressure) for fluid flow and propulsion to be created. The squeeze point is preferably located at or adjacent past a first end of the mid housing. Alternatively, the squeeze point may be located at or adjacent the second end of the mid housing.

The shape and materials of the actuator are to be taken into consideration when preparing the actuator. These may comprise of different materials between parts when modular or releasably engaged.

The actuator may comprise a trigger for depression to affect fluid flow in a predetermined direction from or to the reservoir(s). The actuator may comprise a spring mechanism to bias the trigger to return to a non-depressed position.

A mid housing first end accommodates and affixes to the controller due to controller being moveable for example rotatable which may be manufactured away from the mid housing.

A mid housing second end may also occur when having to accommodate a tip portion when manufactured separately and, made modular or releasably engaged from the mid housing being made to affix to.

A mid housing preferably comprises of reservoirs and may contain an actuator chamber when an actuator is merged onto.

At least one piston may be preferably located within one or more of the fluid pathways.

The at least one piston is preferably configured in use to prevent back flow of fluid within the corresponding fluid pathway.

The at least one piston is preferably configured to drive fluid in a predetermined direction along the fluid pathway towards the tip portion in respective reservoir.

The actuator may comprise at least one spring such as a compression and torsion spring. The inclusion of at least one spring may allow for more accurate dispensing of fluid.

In one embodiment, the actuator comprises a spring mechanism in combination with a linear or rotatable cam type system to provide for unidirectional propulsion and providing for efficient energy distribution.

In one embodiment, one or more of the mid housing and/or the actuator and/or controller is ergonomically designed.

In one embodiment, the tip is contoured to cup onto an anatomy to aid in comfort.

In one embodiment, the housing comprises at least one contact surface configured in use to be supported on a surface. Ability of device being stored in an upright position allows to reduce risk of contamination for example when it is recommended to be kept in the fridge rather than room temperature due to dispensing fluid characteristics under certain environmental conditions. A suitable gap between fluids and outer elements can also be maintained in a predetermined storage position. Storing of the device in an upright position or predetermined can also be advantageous for refilling of the device. The device may be effectively V-shaped or U-shaped. A tip portion may be provided adjacent one free end of the V-shaped or U-shaped device and an actuator may be provided adjacent the opposed free end of the V-shaped or U-shaped device. The controller may be positioned between the tip portion and actuator. The controller may provide a contact surface to enable the device to be positioned in an upright position when not in use.

The actuator may be an electronic actuator configured to apply pressure to affect fluid flow. The use of an electronic actuator may enable ease of operation and/or a consistent pressure to be applied each time the device is operated.

The device may comprise a power supply in communication with the actuator. The power supply may for example be a battery.

The actuator is preferably positioned at or adjacent a first end of the at least one reservoir, and the tip portion is positioned at or adjacent an opposed second end of the at least one reservoir.

In one embodiment, the actuator is configured in use to generate unidirectional flow of predetermined fluid along the one or more selected fluid pathway(s).

The actuator is preferably configured to provide for push-flow of fluid from the reservoir(s) in a direction towards the outlet.

The actuator is preferably configured to provide for pull-flow of fluid towards the reservoir(s) in a direction from the outlet.

The actuator is preferably configured to provide for push-flow and pull-flow (for example sequentially) to provide for fluid flow between the reservoir(s) and the outlet.

The actuator may be located within the mid housing. The actuator and/or actuator chamber may be positioned between adjacent reservoir(s) to provide for improved space efficiency.

The shape and/or dimensions of the actuator may vary depending on the particular requirements of the device and the propulsion force required.

The actuator may be releasably engaged to the mid housing and as such can allow for removal, cleaning, maintenance and/or replacement.

The reservoir and related dispensing fluid pathway may be further configured to ensure that high pressure remains behind a fluid to prevent fluid back flow. In one embodiment, the reservoir may include one or more pistons and/or on a rail system in communication with the fluid flowpath to provide positive pressure thereto.

The piston/rail system may be configured for unidirectional movement of the piston relative to the rail system.

In one embodiment, the piston/rail system may be configured to release the required dosage of fluid on activation of the actuator.

The piston/rail system may be configured to be returned to the initial position on application of force in an opposing direction.

An actuator can provide high pressure or a vacuum inside the actuator fluid pathway which can comprise of the actuator chamber, controller bridge chamber and reservoir or part depending on quantity of dispensing fluid in reservoir to provide positive pressure thereto a fluid flow path in conjunction with a piston and/or rail system or non.

In one embodiment, fibres in a tread pattern pointing towards the tip may be configured inside of a reservoir to encourage a unidirectional movement encouraging push flow whilst also discouraging backflow.

Fibres may also be configured to adapt to flow patterns being applied, for example when a push flow movement is applied from the actuator propulsion having the ability to remain pointing towards the tip; when an alternative pull flow movement is applied having the ability to revert to an opposite position adapting to the movement being applied.

One or more of the housing (mid housing, actuator, controller and/or tip portion) preferably further comprises at least one inlet and/or bleed valve(s) configured in use to provide for airflow therethrough. The provision of inlet(s) and/or bleed valve(s) enables the device to be reusable to ensure air can flow back into or out of the device. For example, the device may comprise one or more inlet(s) and/or bleed valve(s) located at one or more different locations on the housing (for example mid housing and/or actuator and/or controller) to provide for improved management and control of fluid within the device.

The inlet and/or bleed valve(s) are preferably configured to allow for air movement into and/or out of the device. Therefore the removal of actuator fluid can also be made and/or maintained when a vacuum within the actuator is preferred.

Inlet(s) and/or bleed valves can be further merged with dual function of in and outward movement of fluid and can serve in a singular component affixed anywhere to device and/or housing.

An actuator involvement may also help to provide high pressure within by drawing air inwards. For example frequent small triggers to the actuator enough to draw air into but not influencing expelling fluid out from the tip via associated high pressure valve or non.

An actuator involvement may also help to provide a vacuum within by expelling air outwards. For example frequent small triggers to the actuator enough to draw air into but not influencing expelling fluid out from the tip via associated high pressure valve or non.

One or more portions of the housing may be transparent. For example, the mid housing may comprise one or more transparent/part transparent windows or assembly parts. The one or more transparent windows may be positioned to enable a user to view a respective reservoir, fluid and/or fluid pathway. The transparent window(s) are preferably configured to provide the user with a line of sight to the reservoir(s) to improve identification of the fluid and/or fluid level. For example, certain fluids (such as for example health supplements or drugs) may be categorised into different designated colours by organic or inorganic markers to provide for improved identification. Using technology (i.e smart phones and/or software) to scan and identify the shade of colour present can allow for identification from the detected shade or if using a colour code system database.

Transparency may also allow internal components to be better seen for example the actuator, and related components to the actuator such as the actuator chamber, and/or an actuator when made electronically and/or spring mechanisms attached to. Controller mechanisms such as bridge chambers but also tip portion configurations (for example with moving components or when a high pressure valve is attached) can be easily visible through transparency that can aid in function.

The housing may comprise one or more gripping portions (i.e. portions which are textured) to aid grip of a user during use.

The actuator may be incorporated and/or merged into the controller.

The tip portion may be incorporated and/or merged into the mid housing.

The tip portion are preferably shaped to allow for target and delivery of a fluid (or fluids) easily and efficiently onto an anatomy (for example human anatomy) structure of various parts and shapes such as for example through oral, nasal and otic routes. The shape of the tip portion for example being extended can help with overall application for example transdermal to the lower body.

The tip portion may be formed or partly of material which is capable of being depressed or cupped to deform to the shape of a human lip for oral administration.

Part of the tip portion may contain material that provides cushioning, support and comfort when in contact with an anatomy.

The tip portion may be interchangeable with a variety of valves or nozzles to change the type of distribution admission of fluid being delivered. For example, the tip portion may comprise a high pressure valve to enable low density substances to be delivered as a spray in order for example to cover a wider area upon administration.

A high pressure valve can have a benefit of not only changing the admission type of the fluid into a spray but also allow for maintaining separation of fluids keeping them in their respective flow paths prior to entry into one high pressure valve.

The high pressure valve may be releasably mountable with the tip portion.

The high pressure valve may form an integral part of the tip portion and/or mid housing.

The tip portion may be releasably engaged (for example modular) to the mid housing allowing for removal, cleaning, maintenance and/or replacement In one embodiment, the outlet is moveable between a first open position allowing fluid flow therethrough, and a second closed position preventing fluid flow therethrough. For example, the outlet may be moveable between the first open position and the second closed position by rotation.

The outlet is preferably configured in use to be moveable between the first open position and the second closed position in dependence on actuation of the actuator.

The tip portion may comprise a first tip portion in communication with the mid housing, and a second tip portion rotatably mounted on the first tip portion and defining the outlet. The second tip portion may be rotatable relative to the first tip portion dependent on the force applied. Rotation of the second tip portion relative to the first tip portion preferably moves the outlet between the first open position and second closed position.

The outlet (or tip portion) may be a spray device.

In one embodiment, the tip portion comprises a plurality of outlets.

The tip portion is preferably contoured for administration to a predetermined part or multitude of a user's body. For example, the tip portion may comprise a curved portion adjacent the outlet.

The tip portion may be rotatable relative to the reservoir(s). The tip portion may comprise a thread or similar such as spiral portion for engagement to a corresponding threaded/spiral portion on the mid housing. Rotation of the tip portion may restrict flow of fluid through the outlet. For example, the tip portion may be moveable between an open position in which fluid flows through the outlet, and a closed position in which the outlet is closed preventing fluid therethrough.

Tip portion may be rotatable relative to the applied force from a reservoir(s). The tip portion may comprise a portion to assist movement such as a thread or spiral for engagement to a corresponding threaded/spiral portion on the mid housing. Rotation of the tip portion may restrict flow of fluid through the outlet. Therefore dosage can be monitored and limited regardless of the applied force from an actuator.

The or each reservoir may preferably further comprise a fluid inlet configured in use to receive fluid therethrough into the corresponding reservoir.

The device may further comprise a cartridge defining a cavity comprising a fluid. The cartridge preferably comprises an outlet in fluid communication with the cavity. The outlet of the cartridge is preferably configured in use to be received within the inlet of at least one reservoir(s) of the mid housing or to receive the outlet of the tip portion to provide for a fluid pathway there between for fluid to flow from the cavity of the cartridge into the corresponding reservoir of the mid housing.

A cartridge may also define a reservoir in communication when affixed to the mid housing from either end; a controller and tip portion to define a fluid pathway.

In one embodiment, a fluid pathway extends between each reservoir and the outlet.

The controller is preferably configured to independently select the required fluid(s) for delivery from their respective reservoir(s) as required.

The controller is preferably rotatable to select and/or control the flow of fluid to or from at least one reservoir.

The mid housing preferably comprises a first end located at or adjacent the reservoir(s) and an opposed second end located at the tip portion. In one embodiment the device defines a longitudinal axis extending between the first and second ends thereof. The controller is preferably rotatable about an axis extending substantially parallel to the longitudinal axis of the mid housing. The controller preferably comprises a threaded portion (or similar such as a spiral to aid in movement) for engagement with a corresponding threaded portion provided by the mid housing. The threaded portion(s) may provide for positive feedback, in the form of for example "clicks", when the controller is rotated to one or more predetermined positions relative to the mid housing. The positive feedback provides for improved user satisfaction.

Positive feedback in the form of clicks may also be applied to the actuator depending on configuration for example the inclusion of springs and cam systems.

The controller may be moveable between the open position and closed position by linear movement. The controller is preferably slide-able to select and/or control the flow of fluid to and from at least one reservoir.

In one embodiment, the controller is configured to provide a fluid pathway when positioned in the open position. The fluid pathway is preferably configured, when the controller is in the open position, to be in fluid communication with the actuator chamber. On movement (for example by sliding or rotation) of the controller to the closed position, the fluid pathway is separated from the actuator such that an interruption is provided, for example in the form of an abutment surface or valve provided by the controller.

When an actuator is merged onto the mid housing the controller's bridge chamber that accommodates the actuator fluid pathway is preferably an open ended channel for example an inwardly curved cavity. The bridge chamber extends in a U-shaped configuration from the first end of the controller. Preferably each open end of the bridge chamber is defined by the first end of the controller. The controller may comprise any suitable number of open ended fluid pathways depending on the particular requirements such as number of reservoirs that need accommodating. For example administration delivery of one fluid or more than one from their respected reservoir. When an actuator is away from the mid housing more simple bridge chamber configurations to accommodate actuator fluid pathway can exist.

The controller may be configured in use to selectively direct force from operation of the actuator to the required reservoir by alignment of the bridge chamber and accommodated actuator fluid pathway; with the selected reservoir and with the actuator chamber. In one embodiment, the controller and bridge chamber housed within the controller is configured in use to disconnect each reservoir from the actuator chamber so as to close the device when not in use as no propulsion can proceed. In one embodiment, the controller and bridge chamber is configured in use to connect each reservoir to each other therefore disconnecting the reservoirs from the actuator chamber so as to close the device when not in use as no propulsion can move into a reservoir or fluid pathway.

In one embodiment, a device comprises a single actuator comprising an actuator chamber, two reservoirs and two fluid pathways, each extending from a reservoir to the outlet at the tip portion.

The controller may comprise of an upper end made to affix to the lower or first end of mid housing to allow for a pathway to exist with the usage of a bridge chamber within the controller that connects and allows communication between an actuator (via actuator chamber) and reservoir(s).

Because the controller (and therefore bridge chamber) is moveable relative to the mid housing a user has the ability to select a reservoir for a fluid pathway to exist and administration out of the device to occur. This happens when both lower mid housing end and controller upper end are aligned appropriately. In a push flow system when administration of a fluid is desired the first or lower mid housing is the entry point for a reservoir whilst the controller upper end is the entry point for actuator and corresponding propulsion into actuator fluid pathway including actuator chamber.

The controller may comprise of an upper affixture abutment end made to affix to the mid housing first or lower end for the actuator to be with communication with reservoir and to allow movement of fluid pathway with the use of a bridge chamber within the controller connecting both actuator and reservoir(s).

It is preferred that a one channel actuator chamber to exist for more efficient energy distribution and management influencing controller configuration and overall functionality. Therefore a plethora of actuator configurations can exist shared through one actuator chamber. However more can occur.

In one embodiment an actuator and corresponding actuator chamber can be merged onto the mid housing adjacent to reservoirs. A controller therefore is needed to link the pathway of the actuator providing the propulsion and the reservoir which contains the dispensing fluid. Therefore a selection can occur with a controller allowing the user to select appropriate reservoir which houses the dispensing fluid before the actuator is triggered. In a two channel device an inwardly curved cavity can be used conveniently with two open ends to allow for entry and exit points for the actuator fluid to be diverted into appropriate and selected reservoir(s). For example, a first entry point aligned with the actuator chamber and at least one further exit point aligned with the or each reservoir.

When the actuator is made away from the mid housing a more simple cavity configuration within the controller can exist whereby because the actuator and corresponding actuator chamber is not merged onto the mid housing there is no need to accommodate a relay pathway consisting of an entry and exit point. The only responsibility for the controller is to select the correct reservoir for administration out of the device to occur because the actuator and actuator chamber is now on the opposing side located away from mid housing. Advantages and disadvantages can exist in various embodiments where the actuator is merged onto mid housing or made away from.

The controller end is preferably configured to be moveable (for example moveably mounted on a pivot or thread) relative to the mid housing lower first end to move the controller between one or more open positions and a closed position by allowing the actuator fluid pathway to move relative to the reservoirs and actuator chamber.

The controller may comprise a chamber or space defining entry and exit points depending on the location of actuator chamber connected to actuator, and the number of reservoirs seated inside the mid housing. For example, an entry point aligned with an actuator chamber/actuator fluid pathway in communication with a reservoir.

The controller may then be positioned in a number of different positions, by rotation relative to the mid housing end to provide a predetermined pathway between the actuator where the generated propulsion force is being applied from and the selected reservoir(s) where the force is being directed behind of a dispensing fluid ready to be pushed out for administration out of the device.

For example, the controller which houses a bridge chamber may be rotatable relative to the mid housing first lower end to provide: a) a first open position in which a first end of the bridge chamber (to accommodate the actuator fluid pathway) is aligned with the actuator chamber, and a second end of the bridge chamber is aligned with a first reservoir, such that operation of the actuator provides a driving force (from the actuator fluid pathway) for fluid to flow from the first reservoir, along the first fluid pathway to the outlet; b) a second open position in which a second end of the bridge chamber (to accommodate the actuator fluid pathway) is aligned with the actuator chamber, and a first end of the bridge chamber is aligned with a second reservoir, such that operation of the actuator provides a driving force (from the actuator fluid pathway) for fluid to flow from the second reservoir; along the second fluid pathway to the outlet; c) a closed position in which a first end of the bridge chamber is disconnected from the actuator chamber and actuator fluid pathway. For example, in which a first end of the bridge chamber is aligned with a first reservoir, and the second end of the bridge chamber is aligned with a second reservoir. Actuator fluid pathway cannot communicate with any fluid pathway inside any reservoir.

The user can then position the controller in a desired position, due to being rotatable, in order to allow for independent flow of each fluid from their respective reservoirs out of the tip portion.

The controller may have any suitable cross-sectional shape and/or dimensions dependent on the particular requirements (such as for example the number of reservoir(s) and/or fluid pathways present and/or location of actuator) for the device. The controller may preferably have one or more of: a substantially circular, Reuleaux or triangular cross-section when made to be operated rotatable.

One or more filters, membranes or valves may be positioned between the controller and the mid housing first lower end that occupies entry points for reservoirs to prevent back flow or cross-contamination between reservoirs.

The provision of inlet(s) and/or bleed valve(s) enables the device to be reusable and functional by ensuring air can flow back into or out of the device. These may be located anywhere on the device in order for airflow to be drawn into or exited from the device. Certain locations along the flow path and/or actuator fluid pathway can be identified and calibrated to ensure adequate flow is maintained or released in usage and/or storage which may affect performance and flow.

The mid housing may comprise one or more divider walls to separate flow paths (or portions thereof) and/or reservoirs from each other.

The device may be modular. One or more components of the modular device may be removed, for example for servicing (for example cleaning) and/or for replacement, and/or to be reinstalled (for example upgrading) as required.

The device may include one or more sealing members located between adjacent components to prevent leakage of fluid therefrom. The sealing members may for example be rubber rings or membranes located to prevent fluid leakage.

The device is preferably a single, integral device. The device may be tamper-proof preventing unauthorised removal of one or more components from the device.

The release of fluid from the tip portion can be dependent on the pressure applied to the actuator. The device may be adapted for use by people with lesser strength in the hand area, such as the elderly or with conditions such as arthritis. For example, the actuator maybe formed of thinner more malleable materials to ensure that the actuator is activated upon light pressure.

The actuator may serve the purpose of readying or setting up the device for administration by making minor movements that allow a predetermined fluid to be in contact with the outlet for improved function. In some embodiments this may be even simpler by tilting at an angle or shaking to ensure the fluid is at a desirable position located towards the tip end. A piston can be used located prior to the fluid being dispensed and used as such to help when making minor movements in order to push fluid towards an outlet and/or to help with retention in this area. A more forceful actuator movement can be then applied for suitable administration to occur.

In one embodiment, the device further comprises a closure mechanism (in the form of for example a cap or lid) configured in use to be received on the tip portion and to extend across (preferably to effectively seal) the nozzle. The closure mechanism may further include one or more openings to provide for airflow therethrough.

The device may be configured to provide for "push flow" (i.e. on operation of the actuator, dispensing fluid is driven from the reservoir(s) and out of the outlet of the tip portion). Propulsion fluid is driven from the actuator towards the tip portion.

The device may be configured to provide for "pull flow" (i.e. on operation of the actuator, dispensing fluid is driven from the outlet of the tip portion towards the reservoir(s)). Propulsion fluid is driven from the tip or reservoir towards the actuator.

In one embodiment, the device may be configured to provide for "push flow" on operation of the actuator in a first movement (for example in a first direction) and to provide for "pull flow" on operation of the actuator in a second movement (for example in a second direction, for example in a direction opposite to the first direction).

According to a second aspect of the present invention, there is provided a cartridge for use in refilling the delivery device as herein described, in which the cartridge defines a cavity for receiving a fluid therein, and in which the cartridge comprises an outlet in fluid communication with the cavity, and in which the outlet is configured in use to receive the outlet of the tip portion and/or to be received within the inlet of the at least one reservoir of the mid housing to define a fluid pathway there between to enable fluid to flow from the cavity of the cartridge to the at least one reservoir of the mid housing.

According to a further aspect of the present invention, there is provided a cartridge for use in refilling the delivery device as herein described, in which the cartridge defines a cavity for receiving a fluid therein, and in which the cartridge comprises an outlet in fluid communication with the cavity, and in which the outlet is configured in use to provide fluid flow of the fluid into one or more reservoir(s) of the mid housing.

According to a further aspect of the present invention, there is provided a method of using a device as herein described, comprising: positioning the controller in a position to provide at least one continuous flow path between one or more selected predetermined reservoir(s) and the actuator; and readying up the device so that the selected fluid is located towards the tip outlet; and activating the actuator to provide propulsion and positive pressure to the predetermined reservoir(s) from controller selection to create fluid flow from the selected predetermined reservoir(s) along respective flow paths and out of the tip portion.

According to a further aspect of the present invention, there is provided a method of refilling a device as herein described comprising: obtaining a source fluid; and positioning the controller in a position to provide at least one continuous flow path between one or more selected predetermined reservoir(s) and the actuator; and positioning the tip portion within the source of fluid; and activating the actuator to exert a force to provide for fluid flow from the tip portion towards the one or more selected predetermined reservoir(s) along respective flow paths.

According to a further aspect of the present invention, there is provided a method of manufacturing a device as herein described comprising: obtaining the mid housing; and engaging the actuator with the mid housing such that the actuator is configured in use to generate pressure to create flow of predetermined fluid along one or more selected fluid pathways(s) into or out of the or each selected at least one reservoir; and engaging the controller with the mid housing such that the controller is configured in use to select and/or control the flow of fluid to or from at least one reservoir as effected by the actuator, in which the controller is configured in use to select the predetermined at least one reservoir for delivery of a fluid therefrom or thereto, and/or to control the direction and/or rate of flow of the predetermined fluid between the predetermined at least one reservoir and the outlet of the tip portion.

BRIEF DESCRIPTION OF FIGURES

Figure 1 is an overview of a front view of the handheld fluid delivery device according to one embodiment of the present invention where an actuator is merged onto the upper mid housing; Figure 2 is a cross sectional view of a two channel configuration that can occur of Figure 1 showing affixture between mid housing first lower end and controller upper end according to one embodiment of the present invention; Figure 3 is a cross sectional view of a three channel configuration that can occur of Figure 1 showing the merging of mid housing first lower affixture end and controller upper affixture end according to one embodiment of the present invention; Figure 4 is a front perspective view highlighting function of the same Figure 1 and movement of selected parts that can and/or may occur; Figure 5 is front perspective view highlighting actuator fluid pathway that can occur in a two way channel embodiment whereby one empty reservoir is being selected of the same Figure 1; Figure 6 is a side perspective view highlighting actuator fluid pathway that can occur in a two way channel embodiment whereby one empty reservoir is being selected of the same Figure 1; Figure 7 is a side perspective view highlighting function of the same Figure 1 and movement of selected parts that can and/or may occur; Figure 8 is an above perspective view highlighting actuator fluid pathway that can occur in a two way channel embodiment whereby one empty reservoir is being selected of the same Figure 1; Figure 9 is an above perspective view highlighting function of the same Figure 1 and movement of selected parts that can and/or may occur; Figure 10 is front perspective partial view of mid housing first lower abutment end accommodating two reservoirs and actuator and it's actuator chamber merged onto upper mid housing; Figure 11 is a cross sectional view of a two channel configuration that can occur of Figure 1 showing the merging of mid housing first lower abutment affixture end and controller upper abutment affixture end whereby reservoir 1 is selected according to one embodiment of the present invention; Figure 12 is a front perspective view of the same configuration Figure 11 showing the controller with upper affixture abutment end and an inwardly curved bridge chamber with entry and exit points; Figure 13 is a cross sectional view of a two channel configuration that can occur of Figure 1 showing the merging of mid housing first lower abutment affixture end and controller upper abutment affixture end whereby reservoir 2 is selected according to one embodiment of the present invention; Figure 14 is a front perspective view of the same configuration Figure 13 showing the controller with upper affixture abutment end and an inwardly curved bridge chamber entry and exit points; Figure 15 is a cross sectional view of a two channel configuration that can occur of Figure 1 showing merging of mid housing first lower abutment affixture end and controller upper abutment affixture end whereby no reservoir has been selected according to one embodiment of the present invention; Figure 16 is a front perspective view of the same configuration Figure 15 showing the controller with upper affixture abutment end and inwardly curved bridge chamber denoting entry and exit points; Figure 17 is a partial side perspective view showing flow of actuator fluid pathway from actuator chamber, into controller bridge chamber and into selected reservoir/channel; Figure 18 is an above view of cross sectional Figure 17 highlighting function whereby an actuator fluid pathway occurs from rotation of the controller and alignment occurring between actuator chamber and reservoir; Figure 19 shows an above view of cross sectional Figure 17 and 18 of inner and outer actuator fluid pathway with controller bridge chamber; Figure 20 shows the same two channel configuration of Figure 17, 18 and 19 in a more convenient key diagram highlighting mid housing first lower abutment affixture end and upper controller abutment affixture end with three positions that can occur; Figure 21 shows a two channel configuration applying to mid housing first lower abutment end and controller upper abutment end with an inwardly curved controller bridge chamber in a more convenient key diagram; Figure 22 shows a shared two channel configuration applying to mid housing first lower abutment affixture end and controller upper abutment affixture end with V shaped controller bridge chamber in a more convenient key diagram; Figure 23 shows a three channel configuration applying to mid housing lower first abutment affixture end and controller upper abutment affixture end with an inwardly curved controller bridge chamber in a more convenient key diagram; Figure 24 shows a four channel configuration applying to mid housing lower abutment first end and controller upper abutment end with an inwardly curved controller bridge chamber in a more convenient key diagram; Figure 25 shows a six channel configuration applying to mid housing first lower abutment affixture end and controller upper abutment affixture end with inwardly curved controller bridge chamber and central actuator chamber in a more convenient key diagram; Figure 26 shows a six channel configuration applying to mid housing lower first abutment affixture end and controller upper abutment affixture end with inwardly curved controller bridge chamber and central actuator chamber with void/off position in a more convenient key diagram; Figure 27 shows a six channel configuration with three shared reservoirs applying to affixture abutments ends mid housing first lower and controller upper with inwardly curved controller bridge chamber and central actuator chamber with void/off position in a more convenient key diagram; Figure 28 showing a cross sectional view of a selected reservoir configuration whereby the fluid is in an ideal position in contact with the tip for actuator to be applied activated for delivery to occur; Figure 29 showing a cross sectional view of a selected reservoir configuration whereby the fluid is full and therefore in an ideal position in contact with the tip for actuator to be applied and activated for delivery to occur; Figure 30 showing a cross sectional view of a selected reservoir configuration whereby the fluid is half full and not in an ideal position away from the tip and an unwanted space occurring between; Figure 31 showing a cross sectional view of a selected reservoir configuration whereby unwanted air gaps are situated in a fluid causing spaced apart areas, division and stagnation; Figure 32 showing a cross sectional view of a selected reservoir configuration with piston whereby the fluid is half full and not in an ideal position away from the tip and an unwanted space occurring; Figure 33 showing a cross sectional view of a selected reservoir configuration with piston whereby the fluid is in an ideal position contact with tip for actuator to be activated for delivery to occur; Figure 34 showing a cross sectional view of a selected reservoir configuration with fibre tread pattern whereby the fluid is in an ideal position in contact with the tip for actuator to be applied activated for delivery to occur; Figure 35 is a partial cross sectional view of tip portion accommodating a single channel; Figure 36 is a partial cross sectional view of tip portion accommodating two channels; Figure 37 is a partial cross sectional view of tip portion accommodating a single channel with high pressure valve seated within; Figure 38 is a partial cross sectional view of tip portion accommodating two channels with high pressure valve seated within; Figure 39 is a partial cross sectional view of tip portion accommodating two channels with high pressure valve mounted onto; Figure 40 is a partial cross sectional view of tip portion accommodating two channels with high pressure valve merged onto; Figure 41A is an illustration of a perspective view of the handheld fluid delivery device according to a further embodiment of the present invention illustrating parts assembly that may occur; Figure 41B is an illustration of an exploded perspective view of a high pressure valve suitable to be housed within the tip portion; Figure 42 is a cross sectional view of the upper mid housing abutment affixture second end whereby when affixed to tip portion; Figure 43 is an illustration of a perspective view of the handheld fluid delivery device of Figure 41 according to a further embodiment of the present invention illustrating function and interaction; Figure 44 is an illustration of a partial sectional piston and rail system that can occur inside a reservoir with an actuator and fluid pathway activated according to one embodiment of the device; Figure 45 is an illustration of a partial sectional piston and rail system that can occur inside a reservoir with no activation of actuator according to one embodiment of the device; Figure 46 is a front perspective illustration of an elaborate lady figurine embodiment of the same function as Figure 1 of a two way channel; Figure 47 is a side perspective illustration of an elaborate lady figurine embodiment of the same function as Figure 1 of a two way channel; Figure 48 is a side perspective cross sectional illustration of an elaborate lady figurine embodiment of the same function as Figure 1 two way channel highlighting actuator fluid pathway; Figure 49 is a schematic illustration illustrating the functionality and high adaptability between components of the device that may involve merging of parts onto each other that may exist; Figure 50 is an illustration of a front view of a handheld fluid delivery device for rectal administration according to a further embodiment of the present invention; Figure 51 is an illustration of a side view of the handheld fluid delivery device for rectal administration according to a further embodiment of the present invention; Figure 52 is a cross sectional view of alignment and merger between mid housing first lower abutment affixture end and upper controller abutment affixture end of the Figures 50 and 51 for a fluid pathway to exist; Figure 53 is an illustration of a front view of an injector type cartridge according to one embodiment of the present invention; Figure 54 is an illustration of an upper view of upper Figure 53 of an injector type cartridge according to one embodiment of the present invention; Figure 55 is an illustration of a front view of an injector type cartridge according to one embodiment of the present invention; Figure 56 is an illustration of an upper view of upper Figure SS of an injector type cartridge according to one embodiment of the present invention; Figure 57 is an illustration of a side view of a cartridge and lid according to one embodiment of the present invention; Figure 58 is an illustration of an upper view of upper cartridge of Figure 57 showing the cavity and outlet of the present invention; Figure 59 is an illustration of an upper view of upper cartridge of Figure 57 of securable lid; Figure 60 is an illustration of a perspective view of the handheld fluid delivery device with electronic actuator according to a further embodiment of the present invention illustrating a fluid flow path; Figure 61 are user flowcharts for using the device of the present invention. Figure 62 are user flowcharts for using the device of the present invention.

DETAILED DESCRIPTION

Handheld devices for delivering fluids are known within the healthcare, cosmetics (such as beauty, skin and fragrances) and food and beverage industries for human consumption.

The present invention provides for a handheld fluid delivery device which can efficiently and effectively provide for independent selection of one or more fluid(s) for delivery to a target area of a user.

With reference to Figures 1 to 20, the handheld fluid delivery device is configured in use to store and/or release one or more fluid(s) on selection by a user to a predetermined location. The device comprises a mid housing 30 comprising two separate reservoirs 31 and 32. Each reservoir being configured in use to store a predetermined fluid (not shown). The actuator fluid pathway or the actuating propulsion force being generated inside the device is highlighted which pushes and influences the predetermined fluid in reservoir out of the device. The housing further comprises a tip portion 40 comprising at least one outlet 41.

Two separate fluid pathways are defined within the mid housing 30. A first fluid pathway extends between a first reservoir 31 and the outlet 41 of the tip portion 40. A second fluid pathway extends between a second reservoir 32 and the outlet 41 of the tip portion 40. Although the illustrated embodiment shows a device having two fluid pathways and two reservoirs, it is to be understood that the device is not to be limited to this and that the device may comprise any suitable number of pathways and reservoirs.

The housing or part may be transparent or part transparent which can help a user to interact with the device because it allows for a dispensing fluid seated inside the reservoir or actuator fluid located behind a reservoir or partly to be easily seen and identified. Moveable parts located anywhere on the device can also be easily identified with transparency and may improve usability.

The device further comprises a manually operable actuator 10 in some embodiments comprising of handles 55, 56. The actuator in the illustrated embodiment is configured in use to be squeezed (i.e. by moving one or both of the handles towards the body of the mid housing) to generate positive pressure and/or air flow within the actuator chamber. The actuator may also resemble a squeeze pump type for example squeeze air bulb depending on materials. The actuator is provided towards an upper portion of the housing for ease of manual operation. The actuator comprises an actuator chamber which is merged onto the mid housing 30 adjacent to reservoirs.

The device further comprises a controller 20 configured in use to select and/or control the flow of fluid to or from at least one reservoir as affected by the manually operable actuator 10. The controller is affixed to the mid housing lower first end 35 because of the requirement and ability to be moveable (such as rotational, depression or linear movement) and select-ability to occur of desired reservoir and therefore administration of dispensing fluid out of the device. The controller 20 is located adjacent a lower portion of the device and preferred located between actuator and reservoirs.

Here showing a mid housing first end for affixture assembly 35 aptly named because of a fluid pathway occurring with first. A second end 37 may be contained to the opposite mid housing end adjacent to a tip portion when made to be affixed or releasably engaged with mid housing and/or to accommodate other tip portions' configurations (and components such as high pressure valves for a spray to occur) and/or to be made moveable in relation to the actuator applied force or user interaction 49 or as seen in Figure 43.

The controller 20 is engaged to the first end 35 of the mid housing 30. The controller 20 may be releasably engaged to the mid housing to allow for removal, cleaning, maintenance and/or replacement of the controller. Affixture may be on a thread or similar spiral portion to allow for movement. The controller comprises a space inside or a bridge chamber 23 for a fluid pathway to exist whereby communication between actuator and reservoirs occurs. This may be in some embodiments depending on where the actuator and actuator pathway are located. For example in some embodiments Figures 1 to 27 the actuator and connecting actuator chamber 13 is merged on the mid housing adjacent to reservoir(s). Therefore the controller has to accommodate the actuator channel and reservoirs acting as an intermediary or connection. For this reason a controller bridge chamber 23, in the shape of an inwardly curved tube housed inside the controller, is applied so that communication occurs with both actuator chamber whereby the force is being generated from 12 and the reservoir whereby the force is being directed towards a dispensing fluid.

In other embodiments Figure 50 and 51 whereby the actuator is made away from the mid housing a simpler bridge chamber configuration can exist to accommodate the actuator flow path inside of a controller pathway. Because the actuator pathway is not housed inside of the mid housing, entry points to accommodate reservoirs can therefore only exist because of the actuator and related actuator items are located away from the mid housing Figure 52.

The controller 20 preferably being modular or being made to affix/engaged is done so because of the ability to be moveable here seated on a pivot 26. Inside defines a controller pathway 28 to exist inside a bridge chamber 23 rotatably mounted on the first or lower end of the mid housing in Figures 1-20. 27 shows the merger of the controller upper affixture end with the mid housing lower or first end whereby a fluid pathway can exist due to the communication between actuator and reservoir(s) from the controller's bridge chamber. This location grants or can restrict communication from the actuator towards reservoir(s) due to the entry points of reservoirs located at this abutment affixture end 33, 34 that exist.

As shown in Figure 2 resembling a two way channel whereby the actuator 10 is merged onto the upper mid housing 30, has to accommodate both reservoirs 33 and 34 pertaining to predetermined fluid being administered out and the actuator chamber 13 whereby force is being applied from 12, 16 to initiate a fluid pathway into the device.

Because a bridge chamber in the configuration of an inwardly curved cavity is used in this embodiment, the controller affixture end is aligned with and to open a first channel or first reservoir for administration to occur. The left side of the bridge chamber is aligned with the actuator chamber and right side being aligned with the first channel or first reservoir. Therefore, the second channel or second reservoir 34 is not in operation because communication does not exist with actuator unless selected by a rotatable movement 81, 82.

Because an inwardly curved bridge chamber is used on a rotatable mount inside the controller; entry and exit points can be reversed. For example in Figure 2 the left side opening of the bridge chamber can be aligned with either the actuator or second reservoir, and the right side opening of the bridge chamber can be aligned with either the actuator or first reservoir. This can be seen more clearly in Figures 10 to 16. However, it is to be understood various configurations and shapes can exist.

The controller provides communication to occur between actuator and reservoirs. Because it is preferred to be located between actuator and reservoir mid sequence, it has the ability to direct or restrict flow. In Figures 1-20 an inwardly curved cavity is contained within providing an open ended U-shape because the actuator is merged onto upper mid housing alongside two reservoirs. The controller is moveable in relation to the mid housing between: a) a first open position in which a first end of the controller fluid pathway and it's controller bridge chamber is aligned with the actuator chamber, and a second end is aligned with a first reservoir, such that operation of the actuator provides a driving force for predetermined fluid to flow from the first reservoir, along the first fluid pathway towards the outlet for administration to occur; b) a second open position in which a first end of the controller fluid pathway and it's controller bridge chamber is aligned with the actuator chamber, and a second end is aligned with a second reservoir, such that operation of the actuator provides a driving force for fluid to flow from the second reservoir, along the second fluid pathway towards the outlet for administration to occur; c) a closed position in which a first end of the controller bridge chamber is disconnected from the actuator chamber and actuator fluid pathway. For example, in which a first end of the controller bridge chamber is aligned with a first reservoir, and the second end of the controller bridge chamber is aligned with a second reservoir. There can be no forward movement into a reservoir from the actuator fluid pathway because no communication exists.

The user may therefore select the required positioning of the controller in order to select the desired predetermined dispensing fluid they wish to be administered out by selecting the appropriate reservoir to be connected to an actuator for a fluid pathway to occur. In some embodiments this may be by rotation 81, 82 when for example mounted on a pivot 26, in order for administration to occur. This can be further seen clearly as illustrated in cross sectional Figures 12, 14 and 16 showing a controller arrangement containing an inwardly curved cavity with corresponding front perspective illustration affixed to a mid housing lower end 35 Figure 10.

Configurations with bridge chamber housed within a controller may change due to accommodating the actuator chamber (for example which may be positioned onto or away from mid housing) and number of reservoirs. Figure 3 shows a further embodiment of the controller. The controller comprises an upper affixture end with the same inwardly curved bridge chamber configuration.

Because of the actuator is embedded similarly to Figure 1 and Figure 2 onto the mid housing, there is a need to relay propulsion from actuator into reservoir from an actuator chamber. Because there is now three reservoirs the inwardly curved cavity can now be positioned to be in open communication between either of three reservoirs and an actuator.

Because all three reservoirs encompass half of the cross-section area of the first lower mid housing end, and actuator chamber encompass the other half, both ends of the bridge chamber in embodiment of an inwardly curved cavity can be switched around or reversed. For example the left side of the bridge chamber may align with the actuator or reservoir becoming both entry or exit points 23, and the right side of the bridge chamber may align with the actuator or reservoir becoming both entry or exit points 23.

The limitations of this particular configuration Figure 3 between controller upper affixture end and mid housing affixture first end where reservoirs entry are located is that there is no configuration to disconnect reservoir from actuator as seen in Figure 2 which can perceived as "switching off" the device. All positions of this configuration can be seen further in Figure 23. Different controller bridge chamber configurations may have advantages and disadvantages.

In use, the controller is rotatable relative to the mid housing first end such that the user can select the correct positioning in which pressure is applied from the actuator into the actuator chamber to the selected reservoir to effect fluid flow therefrom (or thereto). Because here the actuator is mounted and merged into the mid housing; a first end of the U-shaped bridge chamber of the controller which accommodates actuator fluid pathway can be aligned with a reservoir on the lower mid housing end, and the second end of the U-shaped bridge chamber of the controller which accommodates actuator fluid pathway can be aligned with the actuator chamber.

As shown in Figure 4, in use, the controller 20 may be positioned (which houses a bridge chamber in this particular embodiment an inwardly curved cavity with entry and exit ends) relative to the mid lower housing first end (entry points for first and second reservoirs 31, 32) in a predetermined desired position to ensure that the actuator chamber is in communication with the selected reservoir to exert pressure thereon to effect fluid flow from (or to) the reservoir via the nozzle 41.

The user can select the desired position of the controller in order to select a reservoir for a fluid path. to occur in order to release the required fluids from the reservoirs to the nozzle (or to introduce fluids through the nozzle to the reservoir(s)). The controller 20 may be ergonomically shaped, for example taper inwardly 73, to allow for ease of manual contact and rotation in relation to the mid housing.

The controller may provide a contact surface enabling the device to be positioned in an upright position when not in use 75.

As shown in Figures 11 and 16, the actuator chamber end is located inside the mid housing lower first end because of actuator being merged onto upper mid housing on a pivot to enable selection by rotation. The controller which houses an inwardly curved cavity having two ends of entry and exit may be arranged so that is aligned with a first controller position Figures 11 and 12 to accommodate propulsion from the actuator chamber generated by actuator to enable pressure diverted into a first reservoir thereon to drive fluid flow along a first flow path from the reservoir and out of the nozzle and in which the other second reservoir is disconnected from the actuator; and a second controller position Figures 13 and 14 to accommodate same propulsion from the actuator chamber generated by actuator to enable pressure diverted into a second reservoir thereon to drive fluid flow along a second flow path from the reservoir and out of the nozzle and in which the other first reservoir is disconnected from the actuator; and a third controller position Figures 15 and 16 in which the same propulsion from the actuator chamber generated by the actuator is disconnected from both reservoirs and flow paths due to no communication existing between actuator and any reservoir whereby both ends of the inwardly curved cavity instead now accommodating and connecting both reservoirs to each other due to the equal distance between these three points.

In the illustrated embodiment, the controller 20 is placed in the required position by rotation relative to the mid housing lower end Figure 10 about an axis extending between the nozzle 41 at the first end of the mid housing and the second opposed end of the mid housing. It is however to be understood that the controller may be movable between a plurality of different positions to enable the actuator to exert pressure on different reservoir(s) to provide for different fluid flow paths to be provided to selectively release (or introduce) fluid from the respective reservoir(s) (or to the respective reservoir(s)) by any suitable mechanism, for example by a sliding mechanism.

The user positions the tip portion 40 in the correct position adjacent to an anatomy. The user may hold actuator handles Figure 43 and/or mid housing with grip portion. The user's hand applies positive pressure to the actuator 10, for example by squeezing the handles 55, 56 or moving them in towards the body of the housing. The actuator defines a chamber comprising an actuator fluid (for example air) located behind the reservoir(s). The actuator chamber is configured in use such that the actuator fluid (for example air) may pass into the controller bridge chamber and/or reservoir depending on quantity of dispensing fluid. When an actuator force is generated this movement creates positive pressure behind the one or more selected reservoirs which causes dispensing fluid to be moved from the selected reservoirs out of the nozzle 41 of the tip portion 40 and introduced to the anatomy of the user. Actuator fluid and propulsion is shown in Figures 5, 6 and 8. The actuator chamber extends from the handle(s) to adjacent the controller. The fluid flow path extends from a reservoir to the nozzle. In the illustrated embodiment Figure 6, the actuator chamber extends (at least in part) substantially parallel, and in an opposing direction, to the fluid flow path.

The user may then change the fluids to be selected and therefore released from the device by further movement of the controller, for example by rotation.

Figure 43 shows a second tip portion 49 that is rotatable in relation to the first tip portion. This movement can be influenced by the actuator propulsion force being applied and therefore a user is enabled to measure the dispensing fluid being administered out of the device. This function may also be applied to the first tip whereby a limiter can also be applied for example when the portion has fully rotated and reached a point of not being able to turn further. This also can be in correlation of the second tip portion end in relation to the first tip portion end or the mid housing whereby a fluid pathway is blocked due to the design of the end disallowing fluid to flow through. This can be easily reset by a user turning the tip portion made to rotate the other way.

It is to be understood whereby a part of the tip portion (for example outermost) is made to be rotatable to prohibit or allow through fluid flow from the reservoir to enable administration of a fluid from reservoir, similarly a linear movement can occur for the same function.

A bleed valve is located adjacent the actuator between the handles 55, 56. It is to be understood that the bleed valve may be located at any suitable position on the housing for example 90, 91, 92 and 95. The housing may include any suitable number of bleed valves. The bleed valve is configured to allow air to flow into or out of the device (for example into the actuator chamber) for example to create and/or sustain a predetermined pressure. This is particularly useful when the actuator fluid consists of primarily air but also a vacuum. The bleed valve(s) may also be configured to allow air to flow in one direction (for example solely out), for example to getting rid of accumulated unwanted air which can interfere with flow or fluid pathway. Or where a vacuum is preferred and device has been calibrated to retain a vacuum whereby a bleed valve can help with keeping air out.

As shown in Figures 21 to 27, the controller may have any suitable configuration, any suitable shape, with any suitable number of openings or ends in any suitable positions. These figures demonstrate the high flexibility of the controller of the device when an actuator and actuator chamber is located onto the mid housing. The various positions available of the bridge chamber relative to the mid housing end is illustrated demonstrating the select-ability of the controller. For example these include when actuator chamber is made to the outer or inner mid housing and adjacent to reservoirs. When an actuator is located away from the mid housing for example opposing end of the controller or merged onto the controller the need to accommodate an actuator chamber will not exist Figure 50 however it is to be understood a bridge chamber still to exist albeit in simplest form.

In one embodiment controller position selectivity can provide connection solely to an inlet and/or bleed valve where location is provided preferably on the controller. Because now the actuator is connected exclusively to a mechanism to manage air (draw into and/or expel out of) involvement can be intensified and not dependent on pressure applied.

It is to be understood a bridge chamber 23 connects the actuator fluid towards 28 the dispensing fluid housed inside of a reservoir 1. Because in figure 52 the actuator is merged onto controller there is no requirement to accommodate an actuator chamber from the mid housing end therefore an arrangement of having an inwardly curved cavity inside controller as shown in Figures 1 to 20 does not exist as not required which won't work in this embodiment.

The controller illustrated in Figures 1 to 20 provide for an actuator fluid to move along into the next preferred sequence of selected reservoir. Because in this embodiment the controller's bridge chamber is an inwardly curved cavity with two ends (an entry and exit point), and the desired setup is for administration from one reservoir to occur, a controller has the responsibility of allowing a fluid pathway to occur by connecting a sequence to establish a flow path. Provided that the actuator has been applied here a sequence along the flow path is preferred being: actuator chamber, controller bridge chamber, selected reservoir, tip portion, outward administration.

Figure 17, 18 and 19 shows the controller due to the configuration inside of a single actuator chamber having three positions and related to a two channel device; which can allow for the device to select either reservoir or to be perceived as switched off (for example when not in use) providing a safety measure which inhibits fluid flow along any flow path. Furthermore in Figures 10 to 16 we can see the ability of the controller bridge chamber's entry and exit points being shared with and influencing all three settings from the ability to rotate and select-ability to occur.

It is preferred that an actuator connects to a single actuator chamber because of the inclusion of a controller. More than one actuator chamber is not preferred (although in some embodiments may exist) that connects to the bridge chamber because of the need to accumulate flow efficiently from which can be various sources of actuators; shapes, designs and components. For example in Figures 1 to 20 a two arm embodiment is merged onto the upper mid housing to generate enough propulsion and direct into one actuator chamber which a controller can manage and distribute if and when needed compared to a singular arm design.

The controller upper end, which may be positioned as required relative to the mid housing first end by the user, enables the actuator chamber to be in communication with selected reservoir to cause fluid to flow out of or into the selected reservoir(s).

As shown in Figures 50 to 52 which are accommodating two reservoirs and therefore the ability to accommodate two different fluids for administration, the controller upper end may in some embodiments provide for a single opening pathway to exist and a mid housing first end containing entry into these reservoirs with two pathways. This is because the actuator is located away from the mid housing and merged onto the controller therefore an inwardly curved cavity as seen in figures 1 to 20 to relay actuator fluid will not be suited.

Rotation of the controller relative to the mid housing end enables the user to select the required reservoir upon which the actuator exerts pressure during use, and to provide the required fluid path therefrom. In this embodiment, the flow path between the reservoir and the tip portion extends substantially linearly. The actuator fluid channel defined by the controller is substantially linear in shape.

It may be suitable, depending on the requirements for the device, for the nozzle to provide a spray mechanism. The tip portion may have any suitable configuration to provide a spray out of nozzle 41 as shown in Figures 37 to 40. This may be affixed, merged onto or seated inside the tip portion.

Figures 28 to 34 show some common occurrences of reservoirs depending on the configuration.

Reservoirs correspond to the mid housing and some have been shown in relation to the type and amount of fluid for being administered and actuator fluid located behind. These include normal air pressure, high air pressure, propellants and where and when providing vacuum.

Figure 28 shows a desired configuration whereby the dispensing fluid is in contact with the tip. This is useful when the device is in use and an actuator fluid pathway occurs because it is easier to push out fluid from the device. This ideal setup can happen in a variety of different ways largely depending on the actuator fluid that for example provides a positive force.

For example with a simple operation using normal air pressure to get a desired configuration an end user may wish to tip over the device at an angle for this to occur. For example they may use the smaller and more frequent generated force applied by the actuator. For example the actuator and corresponding actuator fluid pathway may incorporate piston and/or rail system as seen in Figure 33, a propellant, high pressure behind a piston as also seen in Figure 33, fibres with predetermined tread patterns as seen in Figure 34 or provide a vacuum to allow a positive force applied to the administrative fluid to be forced in a desired position.

Non ideal configurations which may occur not ideal for actuator application is when the fluid is not located next to the tip as shown in Figures 30 and 32 where for example gravity may take force in a simple normal pressure and non propellant system, or where there is unnecessary unwanted air that breaks up fluid into multiple segments.

Actuator fluid therefore may consist of high air pressure which provides a positive force for dispensing fluid to be in an appropriate position for usage and administration. Providing a vacuum will have the same positive force where the dispensing fluid is connected to outlet or high pressure valve if and when used. Whereby a liquid is considered as or part of the actuator fluid this will reduce the amount of unwanted air pressure volume in a flow path however mass will also need to be considered which may interfere with actuator force needed.

Controller and actuator have not been shown in these figures to focus on reservoir configuration and eliminating any backflow as much as possible when a device is used for a push flow system or administering a fluid out of the device.

Figures 35 to 40 represent tip configurations that can occur in push and pull flow systems. Figure 35 shows a device that represents one embodiment of the present invention comprising as few parts as possible. Force is applied by the actuator when the arrangement of the device is set up accordingly (for example the user has selected the predetermined fluid using the controller) to perpetuate the required fluid flow out of the tip portion. The tip portion illustrated shows a singular outlet channel.

Figure 36 shows a further device providing two separate flow paths exiting the tip portion. The outlet is configured to prevent cross contamination of the fluid pathways. The applied actuator force provides for a smooth movement out of the device. For example, the device may be utilised, in this configuration, for application of an ointment or cream. The fluid dispensed from a first flow path does not interfere with the fluid dispensed from the adjacent second flow path.

Figure 37 demonstrates a further tip portion with a pressure valve located within the tip portion. The pressure valve is configured to apply higher pressure resulting in a jet spray action of delivery which is useful in some scenarios and end user conditions. Therefore it may be preferable for the tip portion to be modular for ease of assembly when a component is seated inside.

Figure 38 demonstrates a further tip portion in which the fluid paths are separated within the mid housing and each fluid path has an entry point adjacent the pressure valve. This may be further simplified by allowing the lower valve to be circular covering all of the area and allowing entry from every channel only when a suitable actuator force is being applied.

Figure 39 is an integrated and merged onto design. In some embodiments, the tip portion may be rotatable to provide for visual monitoring of outputs for example with graphics printed. The tip portion may be connected on a rotatable thread or spiral. Rotation of the tip portion relative to the mid housing may allow for dosages to be adjusted and monitored when actuator force is applied.

Rotation can also be made to be linear whereby for example instead of rotating to be reset when in communication with actuator and force being applied to, an end user can simply push down the extended tip portion when a limitation due to the movement has been made.

Figure 40 shows a pressure valve or similar component merged onto tip and mid housing. This configuration is useful because it can be calibrated to provide an accurate dosage to occur (for example 5m1) from the tip portion every time when the actuator trigger has been applied. Therefore the need of rotatable mechanisms and further parts assembly to monitor dosages can be avoided.

This is particularly useful when using spring types in the actuator in order to create the same force generated into the device or from with the usage of electronic actuators.

Figures 41 are exploded views of one embodiment of the device. The device comprises two reservoirs, two flow paths and a single actuator chamber connected to a manual actuator. A high pressure nozzle is shown separate which can be applied to be seated inside of a tip portion.

The actuator is a squeeze pump type and merged to the mid housing. Material considerations are taken into account due to the need for certain flexibility in order to generate energy into the device.

Therefore different material considerations may exist on different parts of the device. It is to be understood that the actuator can also compromise of springs to help with function, such as reverting back into place upon trigger when applied to therefore materials can be higher in density. These springs can span a wide variety such as utilising compression and torsion movements.

Bleed valves have been incorporated to the upper portion of the mid housing adjacent the actuator handles 55, 56 of the device. The bleed valve is configured such that when the actuator (for example handles 55, 56) are depressed a push flow movement occurs, when they are reverted back into original position a pull flow movement can occur which can trigger air flow back into the device. This is helped by the usage of bleed valves across certain predetermined positions that can be applied to anywhere on the device/housing. Lightly and repeatedly depressing an actuator can also trigger such an event for example in order to draw enough air in the actuator fluid path to create positive energy applied to a reservoir and behind a dispensing fluid pushing in contact towards the tip end for efficient usage to occur Figure 28 and 33.

Figures 44 and 45 show a partial sectional piston and rail system of the actuator (channel or reservoir) that is present within some embodiments of the device and configured to prevent fluid back flow. The presence of a piston and rail system can help to avoid air deposits forming which can therefore improve the performance of the device by allowing a predetermined fluid to sit in the desired position as close to the outlet. Each reservoir comprises a series of spaced apart grooves to allow for movement of the piston along the fluid pathway to exert a pressure and move fluid predominately in a predefined direction. In one embodiment, one or more grooves are configured to allow movement solely in a predefined direction or together in both a forward or backward direction which can help for reusability of the device, especially for refilling of the device in a pull flow system.

Figures 46 and 47 shows a similar function and two way configuration and merged actuator to mid housing as with previous Figures 1 to 20 however having a more elaborate lady figurine which shows the high adaptability of embodiments that can occur. Here the actuator 10 represents arms 55, 56 extended out which can be manually squeezed or pressed 12 inwards with for example the usage of springs. The torso of a body is symmetrical which can house both reservoirs 31, 32 to either side. The same inwardly curved cavity bridge chamber 23 is used to relay the actuator force 16 applied into a reservoir once selected by the controller 30 made to be rotatable.

A cross sectional illustration shown in Figure 48 helps to see the fluid pathway in more detail. Here not shown the predetermined dispensing fluid that is seated inside a reservoir; and instead a focus on the propulsion and actuator fluid that influences administration to occur due to being located behind a dispensing fluid in line with a flow path. Finally a high pressure valve 45 is seated inside the head or tip portion 40 with the mouth providing the outlet 42.

Figure 49 illustrates the functionality between components of the device and the high adaptability between embodiments. The outer hexagonal shapes 121, 131 denote cartridges that can exist in various variations of the device in order to input the main device for example for the purpose of refilling, or alternatively to draw out for example for the purpose to empty. The actuator (A) shows a manual 10 can exist or 65 illustrated as a circle shows an electronic operation can exist in order to generate pressure into the device indicated by an upwards arrow which flows through the actuator A, controller C, mid housing M, and tip portion T. The tip portion is shown 40 which indicates a jet spray nozzle can be applied 105 affixed onto the tip, located inside or merged onto. A plug 87 represented by a pentagon can be used situated onto the mid housing to gain access to a channel/reservoir for example refilling. A bleed valve and/or a plug may also be used associated to an actuator chamber whereby high pressure, propellant or removal of a fluid to provide a vacuum inside can exist. 140 and 120 demonstrates the refilling abilities and options the device can be adapted to fulfil. 138 shows a pull flow movement from the tip portion whereby the device can also be refilled back into reservoir using this method.

Figures 50 to 51 illustrate a device configured for use to dispense fluid to the rectum of a user. The device is shaped to facilitate fluid entry into rectal pathways. The device comprises an extended tip portion merged onto the mid housing where reservoirs/channels can be found inside in this particular embodiment such as with previous two way channel configuration Figures 1-20. In this embodiment however the actuator and controller are also merged together. Because an actuator and actuator chamber is not merged with a mid housing Figures 1-20 and here instead separate and made away from, the mid housing lower body end only has to accommodate the reservoirs (here being two channel). The upper controller end is also made to only accommodate an actuator chamber whereby in this embodiment being linear a singular cavity exists. For a fluid pathway to occur both ends have to be aligned correctly as shown in Figure 52 reservoir two is an open position whilst reservoir one is closed.

Also showing a multitude of tip outlets that can exist helpful for widespread administration which is useful in some user conditions whereby a high pressure valve may be situated inside or merged onto upper housing. A bridge chamber 23 still exists whose duty is to connect an actuator with the reservoir although less noticeable. The entire housing is partly transparent showing one reservoir being full whilst the other adjacent is near half empty with a piston system suitable and ready for administration. Both fluids are pushed in the ready position towards the tip represented by the controller and actuator pathway may contain high pressure, providing a vacuum or the user is applying light repeated actuating pressure.

Showing how the actuator can be merged with the controller and high adaptability of embodiments.

As the controller needs to be modular and affixed to the lower first mid housing end, here in this embodiment shown seated on a pivot and rotatable allowing to be aligned with different flow paths. A suitable arrangement for this device would include between two and four fluid pathways and respective reservoirs. A sheath cover lid protects and keeps the extended tip portion clean which can also be easily removed and changed purposefully for hygiene compliance. The tip portion can be made modular and interchangeable with the mid housing also to comply with hygiene compliance.

Bleed points 95 are ideally located to the lower housing to help control and manipulate air flow (for example back and/or out of the actuator fluid pathway) and apply positive pressure behind a dispensing fluid inside a reservoir. The illustrated embodiments can be designed for singular disposable and/or personal and/or multiple usages. The illustrated embodiments are configured to provide for jet spray action to occur which helps with administration to the rectum area. This can be made possible with a high pressure component to the inner extended tip module or even can be made merged onto the tip portion which is merged with the upper housing.

Figures 53 to 56 illustrate cartridges for use in conjunction with the device for introducing fluid into or refilling of the device. The cartridges may be configured for injecting fluid into the device or for fluid to be drawn back into the device by use of the actuator. The cartridges may be configured to be attached and detached to the device where a reservoir is located along a flow path to dispense fluid thereto.

Another cartridge that can be used when a liquid is preferred is by which allowing the device to draw a dispensing fluid into the reservoir/channel through the tip portion by utilising a pull flow movement which can occur by action of actuator. The Figures 57 and 58 show a cup type cartridge with securable lid whereby a fluid can be drawn up and sit onto an open area allowing the tip to easily draw the substance into for refilling and reusability to exist. This particular cartridge is also convenient to store and become portable. More configurations and methods of refilling can exist and these descriptions are not limited to.

Although the illustrated embodiments have been described in relation to a "push flow" cycle (in which the actuator provides pressure to drive fluid from the reservoir(s) through the tip portion), it is to be understood that the device may be configured for a "pull flow" cycle (in which the actuator provides pressure to drive fluid in a direction from the tip portion to respective one or more reservoirs).

Figures 60 shows another embodiment of the present invention whereby an electronic actuator 65 is used located towards the middle of the mid housing. An electronic actuator is activated by pressing a single button making usage easier. This then generates forward propulsion that moves into the device initially into the actuator chamber and because this force generated is always behind a reservoir administration occurs whereby the administrative dispensing fluid seated inside the reservoir is pushed outwards being directly in line with the flow path.

An outer tip portion to the upper housing is made rotatable and in this embodiment having the ability to restrict or allow a flow path to occur to the outside. Other embodiments may have a tip portion or second tip portion having the ability to be influenced by the actuator showing here not adapted to compared with for example Figure 43.

Figures 61 and 62 represent flowcharts for use of the device of the present invention. The user flow chart compares common oral medical drug intake with the device whereby most notably steps are considerably shortened and in some cases reduced to half. Pain points are highlighted whereby an end user has to find the correct medication bottle and read instructions for identification but also sometimes understand how to use. A safety lock is sometimes needed which can make it difficult for elderly patients and those with weakened muscle tissue to remove. Furthermore, they have to find a liquid to consume with such as water, which can add to steps further prolonging and complicating.

In contrast the device of the present invention significantly shortens these steps once set up and configured correctly for a user. For example refilling with the correct fluid and selecting the correct flow path, usage is more quick and efficient. Simply an end user would select the right flow path with the associated fluid, place on the recommended targeted area and administer through a manual squeeze action if a device is configured as such and to do so. Other configurations of device may occur for example an electronic actuator having the ability to be swapped with an electronic actuator or permanently affixed to. However the user flow remains relatively the same with regards to usage, experience and functionality.

Claims (31)

1. CLAIMS1. A handheld fluid delivery device configured in use to store and/or release one or more fluid(s) on selection by a user to a predetermined location, the device comprising: a mid housing comprising: at least one reservoir, each reservoir being configured in use to store a predetermined fluid; a tip portion comprising an outlet; and at least one fluid pathway extending between the or each respective reservoir and the outlet of the tip portion; an actuator in communication with the at least one reservoir and configured in use to generate flow of predetermined fluid along one or more selected fluid pathway(s) into or out of the or each selected at least one reservoir; and a controller configured in use to select and/or selectively control the flow of fluid to or from at least one reservoir as effected by the manually operable actuator, in which the controller is configured in use to select the predetermined at least one reservoir for delivery of a fluid therefrom or thereto, and/or to control the direction and/or rate of flow of the predetermined fluid between the predetermined at least one reservoir and the outlet of the tip portion.
2. 2. A delivery device as claimed in claim 1, in which the or each fluid is selected from one or more of: liquid, gas, viscous cream and/or powder.
3. 3. A delivery device as claimed in either of claims 1 and 2, in which the device comprises a plurality of reservoirs, and a plurality of fluid pathways, each fluid pathway extending between the outlet of the tip portion and a corresponding reservoir.
4. 4. A delivery device as claimed in any preceding claim, in which the controller is configured in use to independently select and/or control the flow of fluid to or from a singular or plurality of reservoir(s).
5. 5. A delivery device as claimed in claim 4, in which the controller is configured to contain a cavity space within to relay actuator fluid and/or propulsion into a path way(s)/ or reservoir(s).
6. 6. A delivery device as claimed in any preceding claim, in which the controller is rotatable relative to the mid housing to select and/or control the flow of fluid to or from at least one reservoir.
7. 7. A delivery device as claimed in any preceding claim, in which the actuator is a pressure responsive actuator.
8. 8. A delivery device as claimed in claim 7, in which the actuator comprises a squeeze air pump type.
9. 9. A delivery device as claimed in any preceding claim, further comprising a piston located within one or more fluid pathway(s) and moveable on actuation of the actuator.
10. 10. A delivery device as claimed in any proceeding claim, where the actuator and/or actuator fluid pathway(s) comprise providing a vacuum.
11. 11. A delivery device as claimed in any preceding claim, in which the actuator is ergonomically designed.
12. 12. A delivery device as claimed in any preceding claim, in which the actuator is configured in use to generate unidirectional flow of predetermined actuator fluid along the one or more selected fluid pathway(s).
13. 13. A delivery device as claimed in any preceding claim, in which one or more of the housing (actuator, controller, mid housing and/or tip portion) further comprises at least one inlet and/or bleed valve configured in use to provide for airflow therethrough.
14. 14. A delivery device as claimed in any proceeding claim, in which at least one part of tip portion is moveable between a number of predetermined positions for an open position allowing fluid flow therethrough, and/or for a closed position preventing fluid flow therethrough.
15. 15. A delivery device as claimed in any proceeding claim, in which at least one part of tip portion is configured in use to be moveable between a first open position and/or a second closed position in dependence on actuation of the actuator.
16. 16. A delivery device as claimed in any preceding claim, in which the outlet is a spray device.
17. 17. A delivery device as claimed in any preceding claim, in which the tip portion is contoured for administration to a predetermined part(s) of a user's body.
18. 18. A delivery device as claimed in any preceding claim, in which the or each reservoir further comprises a fluid inlet configured in use to receive fluid therethrough into the corresponding reservoir.
19. 19. A delivery device as claimed in claim 18, further comprising a cartridge defining a cavity comprising a fluid, in which the cartridge comprises an outlet in fluid communication with the cavity, in which the outlet of the cartridge is configured to provide fluid flow of the fluid into one or more reservoir(s) of the mid housing.
20. 20. A delivery device as claimed in any preceding claim, in which the device is modular.
21. 21. A delivery device as claimed in any preceding claim, in which the device is a single, integral device.
22. 22. A delivery device as claimed in any preceding claim, further comprising a filter, membrane, and/or valve located between the controller and the mid housing to prevent back flow of fluid.
23. 23. A delivery device as claimed in any preceding claim, further comprising a cap or lid configured in use to be positioned on the tip portion.
24. 24. A delivery device as claimed in any preceding claim, in which the actuator is an electronic actuator and in which the device further comprises a power source.
25. 25. A delivery device as claimed in claim 24, further comprising a charging station configured in use to receive and to supply power to the power source of the device.
26. 26. A delivery device as claimed in any preceding claim, in which at least a portion of the housing or part provides at least one transparent window to provide line of sight to the reservoir(s) or components or parts within.
27. 27. A delivery device as claimed in any preceding claim, further comprising a propellant inside the actuator fluid pathway located between a reservoir(s) and the actuator.
28. 28. A cartridge for use in refilling the delivery device as claimed in any preceding claim, in which the cartridge defines a cavity for receiving a fluid therein, and in which the cartridge comprises an outlet in fluid communication with the cavity, and in which the outlet is configured in use to provide fluid flow of the fluid into one or more reservoir(s) of the mid housing.
29. 29. A method of using a device as claimed in any one of claims 1 to 28 comprising: positioning the controller in a position to provide at least one continuous flow path between one or more selected predetermined reservoir(s) and the actuator; and readying up the device so that the selected fluid is located towards the tip outlet; and activating the actuator to provide propulsion and positive pressure to the predetermined reservoir(s) from controller selection to create fluid flow from the selected predetermined reservoir(s) along respective flow paths and out of the tip portion.
30. 30. A method of refilling a device as claimed in any one of claims 1 to 28 comprising: obtaining a source fluid; and positioning the controller in a position to provide at least one continuous flow path between one or more selected predetermined reservoir(s) and the actuator; and positioning the tip portion within the source of fluid; and activating the actuator to exert a force to provide for fluid flow from the tip portion towards the one or more selected predetermined reservoir(s) along respective flow paths.
31. 31. A method of manufacturing a device as claimed in any one of claims 1 to 28 comprising: obtaining the mid housing; and engaging the actuator with the mid housing such that the actuator is configured in use to generate pressure to create flow of predetermined fluid along one or more selected fluid pathways(s) into or out of the or each selected at least one reservoir; and engaging the controller with the mid housing such that the controller is configured in use to select and/or control the flow of fluid to or from at least one reservoir as effected by the actuator, in which the controller is configured in use to select the predetermined at least one reservoir for delivery of a fluid therefrom or thereto, and/or to control the direction and/or rate of flow of the predetermined fluid between the predetermined at least one reservoir and the outlet of the tip portion.