# US 2010/0168672 A1 · Portable infusion pump of the skin patch type with spiral collapsible reservoir

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- Number: US 2010/0168672 A1
- Document ID: US20100168672A1
- Status: Published application
- Kind: A1
- Application number: 12/282,940
- Filed: 2007-03-14
- Published: 2010-07-01
- Earliest claimed: 2006-03-22
- Assignees: The Technology Partnership PLC
- Inventors: Matthew John Carr
- Web page: https://patentgrep.com/patent/US20100168672A1

## CPC

- A61M 5/148: flexible (A61M5/155 takes precedence)
- A61M 5/14248: {of the skin patch type}
- A61M 5/14228: {with linear peristaltic action, i.e. comprising at least three pressurising members or a helical member}
- A61M 2005/14506: {mechanically driven, e.g. spring or clockwork}
- A61M 2205/0266: Shape memory materials
- A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)}

## Abstract

An ambulatory pump comprising a reservoir (1) for holding the fluid to be pumped and having an outlet (7) through which fluid is expelled in use; a closure (8) device movable relative to the reservoir; and an actuator (14) for moving the closure device relative to the reservoir, wherein the reservoir is arranged in a spiral pattern.

## Claims

### Claim 1

An ambulatory pump comprising:
a reservoir for holding the fluid to be pumped and having an outlet through which fluid is expelled in use;
a closure device movable relative to the reservoir; and
an actuator for moving the closure device relative to the reservoir, wherein the reservoir is arranged in a spiral pattern.

### Claim 2 (depends on 1)

A pump according to claim 1, wherein the closure device is configured to contact the outside of the reservoir such that movement of the closure device towards the outlet of the reservoir crushes part of the reservoir, thereby causing fluid to be expelled from the reservoir.

### Claim 3 (depends on 1)

A pump according to claim 1, wherein the closure is discretely movably such that the reservoir is crushed incrementally.

### Claim 4 (depends on 1)

A pump according to claim 1, wherein the closure device experiences a smaller frictional force when moving towards rather than away from the outlet.

### Claim 5 (depends on 1)

A pump according to claim 1, wherein the closure device is configured such that, in use, it is only movable towards the fluid to expel fluid from the reservoir.

### Claim 6 (depends on 4)

A pump according to claim 4, wherein the closure device further comprises a leg extending rearwardly from the closure such that the leg contacts the outer surface of the reservoir.

### Claim 7 (depends on 1)

A pump according to claim 1, further comprising a ratchet mechanism which engages with the closure device to permit travel only towards the outlet.

### Claim 8 (depends on 1)

A pump according to claim 1, wherein the reservoir is a flexible tube.

### Claim 9 (depends on 8)

A pump according to claim 8, wherein the reservoir has an aspect ratio of between 100 and 10000.

### Claim 10 (depends on 1)

A pump according to claim 1, wherein the spiral is Archimedean.

### Claim 11 (depends on 1)

A pump according to claim 1, wherein the reservoir is formed from a non-resilient material.

### Claim 12 (depends on 1)

A pump according to claim 1, wherein the actuator includes a shape memory alloy element for causing the closure device to move relative to the reservoir and thereby expel fluid from the reservoir.

### Claim 13 (depends on 1)

A pump according to claim 1, wherein the actuator is oscillatory.

### Claim 14 (depends on 13)

A pump according to claim 13, wherein the rotational movement of the oscillatory actuator is limited such that the closure element can only move a predetermined amount for any single actuation.

### Claim 15 (depends on 13)

A pump according to claim 13, wherein the oscillatory actuator returns to its rest position by means of a biassing means.

### Claim 16 (depends on 15)

A pump according to claim 15, wherein the biassing means includes at least one of the following: a spring or a shape memory alloy wire.