HK1120399A - Arrangement for applying a liquid - Google Patents

Description

Device for applying a liquid

Technical Field

The present invention relates to a device for applying a liquid.

Background

Devices for administering liquids are known in practice in many forms, for example in the form of a syringe which, when operated, is pushed by a piston against the liquid inventory contained in a cylindrical cavity, so that the liquid is delivered through a nozzle.

Furthermore, what is known in practice is a so-called micro-syringe which essentially has a cylindrical syringe body, on the first end side of which an application device in the form of a brush, pipette tip or the like is formed, while on the second end side of the syringe body a sleeve-shaped storage container is provided which is closed on the side facing away from the application device and which is guided on a piston-like cylindrical body of the syringe body by a sealing annular projection projecting from the inner wall of the storage container. The piston-like cylindrical body has a transverse bore in the region of the storage container, from which a longitudinal bore branches off which leads to the application device. When the annular projection surrounds the cylindrical body upstream of the transverse channel, i.e. on the side of the transverse channel facing away from the application device, the liquid flow between the storage container and the application device is shut off. If a pressure is exerted on the storage container in the direction of the applicator, the storage container is moved relative to the syringe body and the annular projection of the storage container slides over the transverse channel. Due to the pressure of the cylindrical body on the liquid contained in the storage container, the liquid is transported to the applicator through the annular gap between the cylindrical body and the side wall of the storage container, the transverse channel and the longitudinal channel. However, such micro-syringes are only suitable for administering single component systems.

Disclosure of Invention

It is an object of the invention to provide an application device which offers a wide field of application for applying liquids.

According to the invention, in order to achieve the object defined above, a device for administering a liquid is provided, which device comprises a tubular administration container which defines a receiving chamber and which is provided at a first end with an administration device and at a second end is connected to a storage container having at least one storage chamber via a valve unit. The storage container is formed by a sleeve which is closed on the side facing away from the application device and is guided on the piston-like cylindrical body of the valve unit by at least one sealing annular projection which projects radially from the inner wall of the sleeve. The cylindrical body has a transverse channel in the region of the sleeve, which is connected to a longitudinal channel leading to a receiving chamber of an application container. The storage container is designed to be movable relative to the application container in such a way that, in the closed position of the storage container, the flow of liquid between the storage chamber of the storage container and the receiving chamber of the application container is shut off, while, in the activated position of the storage container, the receiving chamber and the storage chamber are connected by means of the axial channel and the transverse channel of the valve unit.

The device according to the invention can be used in a number of ways, for example, for the administration of multi-component liquids, wherein one component is received by the storage chamber of a storage container and the other component is received by the receiving chamber of an application container. At the start, i.e. when pressure is exerted on the storage container, after the passage through the defined section, the liquid flow between the storage chamber and the receiving chamber is opened, so that the components of the multicomponent system can be mixed in the application container.

Before the device according to the invention is started, the components of the multi-component system can either be stored separately in the storage container and the application container or in chambers of the storage container which are separated by means of at least one partition wall. In the latter case, upon activation of the device, the separating wall is moved so that all the components are pressed into the receiving chamber of the application container, where mixing of the components can take place before application.

In order to prevent the components from flowing out of the apparatus before they are mixed, it is expedient to provide a removable or openable closure in the region of the application device.

In a particular embodiment of the device according to the invention, the application container is made of an elastically deformable soft plastic material. In this way, for application, lateral pressure can be applied manually on the application container, so that the liquid contained in the application container is output by the application device.

In order to facilitate the starting of the device according to the invention, an operating flange is preferably formed in the region of the second end of the application container. In contrast to this, for example, two fingers of the user can act on the actuating flange, wherein the thumb of the same hand pushes a free and closed tip of the storage container for actuation, as a result of which the liquid contained in the storage container is transferred into the application container via the valve unit.

In order to be able to completely empty the storage container, the piston-type cylindrical body expediently has a length which substantially corresponds to the axial dimension of the storage container. The cylindrical body can thus be inserted into the storage container until it reaches its bottom and the liquid is pressed out of the storage container.

The piston-type cylindrical body is preferably defined by an annular recess of the valve unit, into which recess the storage container sinks when moved into the starting position.

In order to define the closed position of the storage container, the annular projection of the storage container can cooperate with an annular groove of the cylindrical body, which is arranged upstream of the transverse channel.

The application device can be designed in a wide variety of forms adapted to the respective application. For example, the applicator may include a brush, a nozzle, and/or a sponge-like application device.

Further advantages and advantageous embodiments of the inventive content can be gathered from the description, the drawings and the claims.

Drawings

An embodiment of the device according to the invention is schematically shown in a simplified manner in the drawing and is explained in detail in the following description. Wherein:

fig. 1 shows a longitudinal section through an application device for a multi-component substance in a closed position; and

fig. 2 shows the device according to fig. 1 in the starting position.

Detailed Description

In the figures, an application device 10 is shown, which can be used, for example, in the medical field for applying a two-component system. For example, the apparatus 10 may be used in the dental field for applying adhesives and the like when mounting porcelain inlays and the like.

The device 10 comprises an application container 12 which is designed tubular and is made of an elastically deformable soft plastic material. The application container 12 is provided at a first end 14 with an applicator 16, which in this case is designed with a brush-like attachment 18.

On the side facing away from the application device 16, a so-called valve unit 20 is inserted into the application container 12, which connects the application container 12 to a storage container 22, which is shown in the drawing as an inverted cup. The storage container 22 is made of an elastically deformable plastic material and is designed in the form of a sleeve which has on its inner wall an annular collar 24 which serves for sealing and is guided axially displaceably by means of the annular collar on a piston-like cylindrical body 26 of the valve unit 20. The storage container 22 is closed at the end facing away from the application container 12.

The piston-like cylindrical body 26 comprises, in the region protruding beyond the operating flange 28, a transverse channel 30 which is connected to an axial channel 32 which leads to an inner chamber 34 of the application container 12.

Furthermore, the valve unit 20 has an annular recess 36 which surrounds the piston-like cylindrical body 26 and into which the side wall of the storage container 22 sinks.

Furthermore, in order to define a closed position which closes off the fluid flow between the storage chamber 38 of the storage container 22 and the receiving chamber 34 of the application container 12, the cylindrical body 26 has, on its outer circumference, upstream of the transverse channel 30, i.e. in the figure above the transverse channel 30, an annular groove 40 which cooperates with the annular projection 24 of the storage container 22. In the closed position, annular boss 24 snaps into annular groove 40.

In the closed position shown in fig. 1, the first component of the multicomponent system, in powder or liquid form, is contained in the receiving space 34 of the application container 12. The liquid second component of the multi-component system is contained in the storage chamber 38 of the storage container 22.

The liquid contained in the storage chamber 38 is prevented from flowing into the receiving chamber 34 of the application container 12 by the annular projection 24 engaging into the annular groove 40 adjacent to the cylindrical body 26.

When the device 10 is activated, axial pressure is exerted on the storage container 22 in the manner of an operating ballpoint pen, whereby the storage container 22 is displaced relative to the application container 12 in the direction of the receiving chamber 34 and the annular projection 24 is displaced past the opening of the transverse channel 30. The liquid in the storage chamber 38 is forced into the receiving chamber 34 of the application container 12 by the force exerted by the piston-like cylindrical body 26 through the annular gap between the side wall of the storage container 22 and the cylindrical body 26, the transverse passage 30 and the axial passage 32. The liquid is mixed here with the other components. The storage container 22 is pushed in the direction of the application container 12 until the free end side of the cylindrical body 26 abuts against the bottom of the storage container 22. This makes it possible to almost completely empty the storage container 22.

After the two components have been mixed in the receiving chamber 34 of the application container 12, the closure device, which is not shown in detail here, is removed/released and the two-component system is applied to the relevant site by lateral manual pressure via the applicator 16 and its brush attachment 18, which is then mounted on the cartridge.

In an embodiment which is not shown in detail here, the storage container has two storage chambers which are arranged axially one behind the other and which are separated by a displaceable partition wall and in which one component of the multicomponent system is arranged in each case. When the system is started, i.e. when an axial pressure is applied to the storage container, the components contained in the storage chamber directly adjoining the cylindrical body are initially forced into the receiving chamber of the application container. When the free end face of the cylindrical body then abuts against the partition wall between the two storage chambers, the second storage chamber begins to be emptied as a result of the axial displacement of the partition wall, so that the component contained in the second storage chamber is likewise pressed into the receiving chamber of the application container, which component is mixed with the first component.

Claims (11)

1. Apparatus for administering liquids, comprising a tubular administration container (12) which defines a receiving chamber (34) and which is provided at a first end (14) with an administration device (16) and is connected at a second end by means of a valve unit (20) to a storage container (22) having at least one storage chamber (38), which is formed by a sleeve which is closed on the side facing away from the administration device (16) and which is guided on a piston-like cylindrical body (26) of the valve unit (20) by means of at least one sealing annular projection (24) which projects radially from the inner wall of the sleeve, which cylindrical body has a transverse passage (30) which is arranged in the region of the sleeve and which is connected to an axial passage (32) which opens into the receiving chamber (34) of the administration container (12), wherein the storage container (22) is designed to be movable relative to the application container (22) such that in a closed position of the storage container (22) a liquid flow between a storage chamber (38) of the storage container (22) and a receiving chamber (34) of the application container (12) is shut off, and in an activated position of the storage container (22) the storage chamber (38) and the receiving chamber (34) are connected by an axial channel (30) and a transverse channel (32) of the valve unit (20).

2. The device according to claim 1, characterized in that the application container (12) is made of an elastically deformable soft plastic material.

3. The apparatus according to claim 1 or 2, characterized in that an operating flange (28) is provided in the region of the second end of the application container (12).

4. An apparatus according to any one of claims 1-3, characterized in that the piston-like cylindrical body (26) has a length which substantially corresponds to the axial dimension of the storage container (22).

5. The device according to any one of claims 1 to 4, characterized in that the piston-type cylindrical body (26) is defined by an annular recess (36) of the valve unit (20) into which the storage container (22) sinks when moved into the start position.

6. Device according to any one of claims 1 to 5, characterized in that the annular boss (24) cooperates with an annular groove (40) provided upstream of the transverse channel (30) on the outer periphery of the cylindrical body (26) to define the closed position of the storage container (22).

7. The apparatus according to any one of claims 1-6, wherein the applicator (16) comprises a brush (18).

8. The apparatus of any one of claims 1-7, wherein the applicator comprises a nozzle.

9. The apparatus according to any one of claims 1-6, wherein the applicator comprises a sponge-like coating device.

10. Device according to any one of claims 1 to 9, characterized in that the receiving chamber (34) of the application container (12) receives a first mixing component of a two-component system and the storage chamber (38) of the storage container (22) receives a second mixing component of the two-component system, which second mixing component mixes with the first mixing component in the receiving chamber (34) of the application container (12) when the storage container (22) is moved into the starting position.

11. The apparatus according to any one of claims 1 to 10, wherein the storage container (22) has a plurality of storage chambers which are separated from one another by at least one movable partition wall.