GB2638910A - Peristaltic pump - Google Patents
Peristaltic pumpInfo
- Publication number
- GB2638910A GB2638910A GB2503871.2A GB202503871A GB2638910A GB 2638910 A GB2638910 A GB 2638910A GB 202503871 A GB202503871 A GB 202503871A GB 2638910 A GB2638910 A GB 2638910A
- Authority
- GB
- United Kingdom
- Prior art keywords
- flexible conduit
- peristaltic pump
- compressor
- movable part
- relative
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
- F04B43/123—Machines, pumps, or pumping installations having flexible working members having peristaltic action using an excenter as the squeezing element
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
- F04B43/1253—Machines, pumps, or pumping installations having flexible working members having peristaltic action by using two or more rollers as squeezing elements, the rollers moving on an arc of a circle during squeezing
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Abstract
A peristaltic pump comprising a flexible conduit for containing a fluid; and an SMA actuator assembly comprising: a compressor part configured to compress the flexible conduit as the compressor part moves relative to the flexible conduit; and one or more SMA elements configured, on contraction, to cause the compressor part to be driven over a continuous range relative to the flexible conduit so as to compress the flexible conduit and displace fluid within the flexible conduit.
Claims (35)
1. A peristaltic pump comprising: a flexible conduit for containing a fluid; and an SMA actuator assembly comprising: a compressor part configured to compress the flexible conduit as the compressor part moves relative to the flexible conduit; and one or more SMA elements configured, on contraction, to cause the compressor part to be driven over a continuous range relative to the flexible conduit so as to compress the flexible conduit and displace fluid within the flexible conduit.
2. The peristaltic pump of claim 1, wherein the SMA actuator assembly comprises: a movable part arranged to move in a plane, wherein the one or more SMA elements are arranged, on contraction, to move the movable part in the plane so as to drive the compressor part over the continuous range relative to the flexible conduit.
3. The peristaltic pump of claim 2, wherein the one or more SMA elements are arranged, on contraction, to move the movable part in the plane so as to drive the compressor part rotationally over the continuous range relative to the flexible conduit.
4. The peristaltic pump of claim 2 or 3, wherein the SMA actuator assembly comprises: a rotating part coupled to the movable part and arranged to rotate about a rotation axis, the compressor part being secured to or integral with the rotating part, wherein the movable part is arranged to move in a plane perpendicular to the rotation axis, and the one or more SMA elements are arranged, on contraction, to move the movable part, such that coupling between the movable part and the rotating part drives continuous rotation of the rotating part about the rotation axis, thereby driving the compressor part over the continuous range relative to the flexible conduit.
5. The peristaltic pump of claim 4, wherein the movable part is arranged to move along a boundary of the rotating part, and the one or more SMA elements are arranged, on contraction, to move the movable part along the boundary of the rotating part, such that contact between the movable part and the rotating part drives continuous rotation of the rotating part about the rotation axis, thereby driving the compressor part over the continuous range relative to the flexible conduit.
The peristaltic pump of claim 4, wherein the movable part is coupled to the rotating part via a crank mechanism, and the one or more SMA elements are arranged, on contraction, to move the movable part, such that the crank mechanism between the movable part and the rotating part drives continuous rotation of the rotating part about the rotation axis, thereby driving the compressor part over the continuous range relative to the flexible conduit.
The peristaltic pump of any of claims 4-6, comprising a further SMA actuator assembly comprising a further movable part arranged to move in a plane, and one or more SMA elements configured, on contraction, to move the further movable part in the plane so as to drive a or the compressor part over the continuous range relative to the flexible conduit.
The peristaltic pump of claim 7, wherein the compressor part is sandwiched between the movable part and the further movable part.
The peristaltic pump of claim 7 or 8, wherein the movable part and the further movable part are configured to be moved out of phase of each other.
The peristaltic pump of claim 2, wherein the compressor part is arranged relative to the movable part such that a position of the compressor part in the plane is determined by a position of the movable part in the plane, whereby movement of the movable part in the plane drives the compressor part over the continuous range relative to the flexible conduit.
The peristaltic pump of claim 10, wherein the one or more SMA elements are arranged, on contraction, to move the movable part along a cyclical path in the plane.
The peristaltic pump of claim 11, wherein the cyclical path is substantially circular.
The peristaltic pump of any of claims 10-12, wherein the compressor part is arranged relative to the movable part such that a rotational position of the compressor part relative to the flexible conduit is determined by a rotational position of the movable part relative to the flexible conduit.
The peristaltic pump of any of claims 10-12, wherein the compressor part is arranged to rotate relative to the movable part.
The peristaltic pump of any of claims 10-14, comprising a positional guide configured to constrain the position of the movable part in the plane so as to hold the compressor part in compression against the flexible conduit.
The peristaltic pump of claim 15, wherein the positional guide comprises an arm pivoted on a pivot and configured to hold the movable part a predetermined distance from the pivot.
The peristaltic pump of any of claims 2-16, wherein the one or more SMA elements are arranged, on contraction, to move the movable part over the continuous range relative to the flexible conduit while substantially maintaining a rotational position of the movable part relative to the flexible conduit.
The peristaltic pump of any preceding claim, wherein the compressor part comprises at its outer surface one or more flexible members arranged to be capable of flexing tangentially when compressing the flexible conduit.
The peristaltic pump of any preceding claim, comprising a plurality of compressor parts configured to compress the flexible conduit as they move relative to the flexible conduit.
The peristaltic pump of claim 19, wherein the one or more SMA elements are configured, on contraction, to cause a plurality of the compressor parts to be driven over the continuous range relative to the flexible conduit.
The peristaltic pump of claim 19 or 20, comprising a further SMA actuator assembly comprising one or more SMA elements configured, on contraction, to cause one or more of the compressor parts to be driven over the continuous range relative to the flexible conduit.
The peristaltic pump of any preceding claim, comprising a housing in which the flexible conduit is fitted.
The peristaltic pump of claim 22, comprising a further SMA actuator assembly comprising a plurality of SMA elements configured, on contraction, to cause the housing to be driven relative to the compressor part.
The peristaltic pump of any preceding claim, wherein the compressor part comprises a wiper or a roller.
The peristaltic pump of any preceding claim, comprising a one-way clutch configured to prevent a direction in which the compressor part is driven relative to the flexible conduit from being reversed.
The peristaltic pump of any preceding claim, comprising a brake configured to controllably prevent the compressor part from being driven relative to the flexible conduit.
The peristaltic pump of any preceding claim, wherein the flexible conduit comprises two layers defining a channel between them and arranged to collapse flat against each other, thereby closing the channel, when the flexible conduit is compressed.
The peristaltic pump of claim 27, wherein one layer of the flexible conduit is connected to the compressor part.
The peristaltic pump of claim 28, wherein the other layer of the flexible conduit is connected to a component that has a fixed position relative to the flexible conduit.
The peristaltic pump of any preceding claim, further comprising a controller configured to: determine a measure of an electrical characteristic of the one or more SMA elements, and determine a position of the movable part based on the measure of the electrical characteristic.
A fluid delivery device comprising the peristaltic pump of any preceding claim, wherein the flexible conduit is configured to hold the fluid to be delivered.
A flexible conduit for a peristaltic pump, wherein the flexible conduit comprises two layers secured to each other at opposing edges so as to define a channel between the layers, wherein the layers are arranged to collapse flat against each other, thereby closing the channel, when the flexible conduit is compressed.
33. A peristaltic pump comprising: a flexible conduit for containing a fluid, wherein the flexible conduit is arranged in a loop; a plurality of compressor parts configured to compress the flexible conduit as the compressor parts move relative to the flexible conduit; and an actuator assembly configured to drive movement of the compressor parts along the flexible conduit; wherein the flexible conduit comprises: a first region in which, in use, a first volume of fluid is displaced by movement of a compressor part per unit angle along the flexible conduit, wherein the first volume is constant over the first region; a second region in which, in use, a second volume of fluid is displaced by movement of a compressor part per unit angle along the flexible conduit, wherein the second volume is constant over the second region and wherein the second volume is greater than the first volume; and a first transition region which connects a first end of the first region to a second end of the second region; a second transition region which connects a first end of the second region to a second end of the first region; a fluid inlet disposed in the first transition region; and a fluid outlet disposed in the second transition region; wherein, as the compressor parts move along the flexible conduit: the compressor parts compress the conduit fully in the first and second regions, so as to separate the respective region into two or more volumes which are not in fluidic communication with each other and to displace fluid along the conduit as the compressor parts move relative to the conduit, and the compressor parts do not compress the flexible conduit fully in the first and second transition regions such that the respective region contains a single volume of fluid.
34. A peristaltic pump according to claim 33, wherein the actuator assembly is configured to drive rotation of the compressor parts around an axis of rotation.
35. A peristaltic pump according to claim 34, wherein the first region of the flexible conduit is an arc having a first radius and the second region of the flexible conduit is an arc having a second radius, wherein the second radius is greater than the first radius. A peristaltic pump according to claim 35, wherein each of the first and second transition regions comprises a first portion which is further from the axis of rotation than a second portion of the respective transition region. A peristaltic pump according to any of claims 34 to 36, wherein the compressor parts are equally angularly-spaced around the axis of rotation. A peristaltic pump according to claim 37, wherein the actuator assembly comprises a constraining component which is configured to: constrain each of the compressor parts to a respective fixed angular position with respect to the constraining component; and allow movement of each compressor part along a respective radial direction relative to the constraining component. A peristaltic pump according to claim 37, wherein the actuator assembly comprises a constraining component comprising a plurality of grooves or apertures which are angularly spaced around the axis of rotation and which each constrain a respective compressor part, wherein each groove or aperture allows movement of the rolling element along a path such that the angular position and the radial position of the compressor part with respect to the constraining component varies along the path. A peristaltic pump according to claim 37, wherein each compressor part is an elongate component which is aligned with a radial direction with respect to the axis of rotation. A peristaltic pump according to any of claims 33 to 40, wherein a cross-section of the flexible conduit varies along a length of the flexible conduit. A peristaltic pump according to any of claims 33 to 41, wherein a cross-sectional area of the flexible conduit in the first region is a first area and is constant along the first region, and wherein a cross-sectional area of the flexible conduit along the second region is a second area and is constant along the second region, wherein the second area is greater than the first area. A peristaltic pump according to any of claims 33 to 42, wherein a cross-sectional area of the flexible conduit varies along the first transition region and/or wherein a cross-sectional area of the flexible conduit varies along the second transition region.
40 A peristaltic pump according to any of claims 33 to 43, wherein the actuator assembly comprises one or more SMA elements configured, on contraction, to cause the compressor parts to be driven relative to the flexible conduit.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2212199.0A GB2621833A (en) | 2022-08-22 | 2022-08-22 | Peristaltic pump |
| GB2219477.3A GB2625728B (en) | 2022-12-21 | 2022-12-21 | Peristaltic pump |
| PCT/GB2023/052186 WO2024042317A1 (en) | 2022-08-22 | 2023-08-22 | Peristaltic pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB202503871D0 GB202503871D0 (en) | 2025-04-30 |
| GB2638910A true GB2638910A (en) | 2025-09-03 |
Family
ID=87929390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2503871.2A Pending GB2638910A (en) | 2022-08-22 | 2023-08-22 | Peristaltic pump |
Country Status (2)
| Country | Link |
|---|---|
| GB (1) | GB2638910A (en) |
| WO (1) | WO2024042317A1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080056920A1 (en) * | 2003-08-15 | 2008-03-06 | Medrad, Inc. | Actuators and fluid delivery systems using such actuators |
| GB2579581A (en) * | 2018-12-04 | 2020-07-01 | Cambridge Mechatronics Ltd | Shape memory alloy actuator drive arrangement |
| US20200277941A1 (en) * | 2017-10-30 | 2020-09-03 | Cambridge Mechatronics Limited | Shape memory alloy actuator bearings |
| EP3936171A1 (en) * | 2019-03-08 | 2022-01-12 | Eoflow Co., Ltd. | Liquid chemical ejection assembly and liquid chemical injection device including same |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115361981A (en) | 2020-01-30 | 2022-11-18 | 塞卡科实验室有限公司 | Redundant interleaved glucose sensor disease management system |
-
2023
- 2023-08-22 GB GB2503871.2A patent/GB2638910A/en active Pending
- 2023-08-22 WO PCT/GB2023/052186 patent/WO2024042317A1/en not_active Ceased
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080056920A1 (en) * | 2003-08-15 | 2008-03-06 | Medrad, Inc. | Actuators and fluid delivery systems using such actuators |
| US20200277941A1 (en) * | 2017-10-30 | 2020-09-03 | Cambridge Mechatronics Limited | Shape memory alloy actuator bearings |
| GB2579581A (en) * | 2018-12-04 | 2020-07-01 | Cambridge Mechatronics Ltd | Shape memory alloy actuator drive arrangement |
| EP3936171A1 (en) * | 2019-03-08 | 2022-01-12 | Eoflow Co., Ltd. | Liquid chemical ejection assembly and liquid chemical injection device including same |
Also Published As
| Publication number | Publication date |
|---|---|
| GB202503871D0 (en) | 2025-04-30 |
| WO2024042317A1 (en) | 2024-02-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2737209B1 (en) | A diaphragm pump for dosing a fluid and an according method | |
| CN101460742A (en) | A volumetric pump comprising a driving mechanism | |
| CA2227859C (en) | Volumetric pump with bi-directional sphincter seal | |
| CN111692083A (en) | Electric diaphragm pump with offset slider crank | |
| US12398708B2 (en) | Mechanism for electronic adjustment of flows in fixed displacement pump | |
| US6733253B2 (en) | Hydraulic air compressor having an automatic water valve regulation mechanism | |
| GB2638910A (en) | Peristaltic pump | |
| KR20130116709A (en) | Multi-purpose vane power unit | |
| EP3875763B1 (en) | Multi-roller peristaltic pump head | |
| US10502197B2 (en) | Pump | |
| CN116641866A (en) | Single-double-cylinder self-adaptive pumping device based on steady flow conveying and pumping method thereof | |
| CN119122797B (en) | Air pump based on pressure feedback self-adjustment and pressure feedback self-adjustment method | |
| US20090092511A1 (en) | Heart-shaped cam constant flow pump | |
| KR101030794B1 (en) | Pulse-less metering pump with dual constant speed cam | |
| US7625188B2 (en) | Heart booster pump | |
| JP2006526101A (en) | Integrated pump and ceramic valve | |
| JP2009008067A (en) | Minute amount discharge pump by annular recessed groove | |
| KR101766508B1 (en) | Swash plate type compressor | |
| KR102405381B1 (en) | Rotary fluid transmission device | |
| KR200482286Y1 (en) | Angle control device of swashplate type hydraulic motor | |
| JP2021099048A (en) | Piston pump | |
| US20060008365A1 (en) | Integrated pump and check valve apparatus | |
| TWM557778U (en) | Pneumatic liquid delivery device | |
| WO2015141403A1 (en) | Plunger pump | |
| KR20140053736A (en) | Swash plate type compressor |