PERISTALTIC PUMP AND REMOVABLE CASSETTE THEREFOR

• US 20090087327A1
• Filed: 09/27/2007
• Published: 04/02/2009
• Est. Priority Date: 09/27/2007
• Status: Active Grant

• Current Assignee: Curlin Medical (Moog Incorporated)
• Original Assignee: Curlin Medical (Moog Incorporated)
• Inventors: Thompson, Loren M., Voltenburg, Robert R. JR.
• Granted Patent: US 8,062,008 B2
• Time in Patent Office: Days
• US Class Current: 417/477.200
• CPC Class Codes: A61M 2205/12 with interchangeable cassettes forming partially or totally the fluid circuit
• CPC Class Codes: A61M 2205/121 interface between cassette and base
• CPC Class Codes: A61M 2205/14 Detection of the presence or absence of a tube, a connector or a container in an apparatus
• CPC Class Codes: A61M 2205/581 by audible feedback
• CPC Class Codes: A61M 2205/582 by tactile feedback
• CPC Class Codes: A61M 39/28 Clamping means for squeezing flexible tubes, e.g. roller clamps tube strippers A61M1/83
• CPC Class Codes: A61M 39/287 Wedge formed by a slot having varying width, e.g. slide clamps
• CPC Class Codes: A61M 5/14232 Roller pumps
• CPC Class Codes: F04B 43/1253 by using two or more rollers as squeezing elements, the rollers moving on an arc of a circle during squeezing
• CPC Class Codes: Y10T 29/49236 Fluid pump or compressor making

Abstract

A removable cassette for a peristaltic pump includes a cassette body and an occluder disposed at least partially in the cassette body and configured to be movable between an occluding position and a non-occluding position. The occluder includes an occluder body and an anti-ejection member integrally formed on the occluder body. The anti-ejection member is configured to substantially prevent the removal of the cassette from the peristaltic pump when the occluder is in the non-occluding position.

Claims

1. A removable cassette for a peristaltic pump, comprising:

a cassette body; and

an occluder disposed at least partially in the cassette body and configured to be movable between an occluding position and a non-occluding position, the occluder including;

an occluder body; and

an anti-ejection member integrally formed on the occluder body, wherein the anti-ejection member is configured to substantially prevent removal of the cassette from the peristaltic pump when the occluder is in the non-occluding position.

2. The removable cassette as defined in claim 1 wherein the anti-ejection member allows removal of the cassette from the peristaltic pump when the occluder is in the occluding position.

3. The removable cassette as defined in claim 2 wherein the cassette body includes an anti-ejection member-receiving slot formed therein.

4. The removable cassette as defined in claim 3, further comprising:

an opening defined in the cassette body; and

a toggle member extending outwardly from the occluder body and through the opening.

5. The removable cassette as defined in claim 4 wherein the toggle member actuates movement of the occluder between the occluding position and the non-occluding position.

6. The removable cassette as defined in claim 1, further comprising:

a tube operatively disposed in the cassette body; and

an occlusion slot defined in the occluder body, the occlusion slot being configured to substantially occlude the tube when the occluder is in the occluding position, and the occlusion slot being configured to substantially allow free flow through the tube when the occluder is in the non-occluding position.

7. The removable cassette as defined in claim 6 wherein the occlusion slot is a key hole slot.

8. The removable cassette as defined in claim 6 wherein the anti-ejection member is a tab integrally formed with a side edge of the occluder body and operatively receivable within an anti-ejection member-receiving slot formed in the cassette body.

9. The removable cassette as defined in claim 1, further comprising a cover disposed over the cassette body and substantially securing the occluder in the cassette body.

10. The removable cassette as defined in claim 1 wherein the removable cassette provides tactile feedback, audible feedback, or combinations thereof when the occluder is moved into the occluding position.

11. A peristaltic pump, comprising:

a pump body;

a cassette removably attached to the pump body; and

an occluder disposed at least partially in the cassette body and configured to be movable between an occluding position and a non-occluding position, the occluder including;

an occluder body; and

an anti-ejection member integrally formed on the occluder body, wherein the anti-ejection member is configured to substantially prevent removal of the cassette from the peristaltic pump when the occluder is in the non-occluding position.

12. The peristaltic pump as defined in claim 11, wherein the pump body comprises a pump body retaining feature configured to releasably attach the cassette to the pump body;

and wherein the cassette comprises a cassette retaining feature matingly engageable with the pump body retaining feature.

13. The peristaltic pump as defined in claim 12 wherein when the occluder is in the occluding position, the anti-ejection member unlocks the cassette retaining feature, thereby allowing the cassette to be removed from the peristaltic pump.

14. The peristaltic pump as defined in claim 12 wherein when the occluder is in the non-occluding position, the anti-ejection member substantially locks the cassette retaining feature, thereby preventing the cassette from being removed from the peristaltic pump.

15. The peristaltic pump as defined in claim 11 wherein the cassette provides tactile feedback, audible feedback, or combinations thereof when the occluder is moved into the occluding position.

16. A method of assembling a removable cassette for a peristaltic pump, comprising:

at least partially disposing an occluder in a cassette body, the occluder including an occluder body having an anti-ejection member integrally formed on a side edge thereof, and the cassette body including a base having two opposed ends defining a plane, whereby the cassette body is substantially parallel to the plane, wherein the base includes an anti-ejection member-receiving slot formed therein, by;

positioning the occluder substantially perpendicular to the plane and substantially aligning a portion of the occluder body including the anti-ejection member with the anti-ejection member-receiving slot;

sliding the anti-ejection member through the slot; and

rotating the occluder body so that the side edge is substantially parallel to the plane.

17. The method as defined in claim 16 wherein the portion of the occluder body is substantially complementarily shaped with the anti-ejection member-receiving slot.

18. The method as defined in claim 16 wherein the cassette body further includes an opening formed therein, and wherein the method further comprises receiving a toggle member through the opening, wherein the toggle member extends outwardly from the occluder body.

19. The method as defined in claim 16 wherein the occluder further includes an occlusion slot formed therein, and wherein prior to at least partially disposing the occluder in the cassette body, and the method further comprises disposing a tube in the cassette body and through the occlusion slot.

20. The method as defined in claim 19, further comprising disposing a cover over the cassette body, thereby substantially securing the occluder therein.