Peristaltic pump and cassette

• US 20010016711A1
• Filed: 05/01/2001
• Published: 08/23/2001
• Est. Priority Date: 11/10/1999
• Status: Active Grant

• Current Assignee: Alcon Incorporated
• Original Assignee: Gary P. Sorensen, Tamer Akkas
• Inventors: Akkas, Tamer, Sorensen, Gary P.
• Granted Patent: US 6,572,349 B2
• Time in Patent Office: Days
• US Class Current: 604/153
• CPC Class Codes: A61M 1/72 Cassettes forming partially or totally the fluid circuit
• CPC Class Codes: A61M 1/77 Suction-irrigation systems aspiration tips supplying fluids A61M1/85; specific for negative pressure wound therapy A61M1/92; combined with tracheal tubes A61M16/0463
• CPC Class Codes: A61M 1/82 Membrane pumps, e.g. bulbs
• CPC Class Codes: A61M 2205/12 with interchangeable cassettes forming partially or totally the fluid circuit
• CPC Class Codes: A61M 3/0201 Cassettes therefor
• CPC Class Codes: F04B 43/1269 the rotary axes of the rollers lying in a plane perpendicular to the rotary axis of the driving motor

Abstract

A peristaltic pump having a molded flow channel contained on an elastomeric sheet that is bonded or mechanically attached to a rigid substrate. The pump head rollers are mounted radially from the axis of rotation of the pump motor and compress the elastomeric flow channels against the rigid substrate.

Claims

1. A cassette for use with a peristaltic pump having a roller head, comprising:

a) a body having an exterior;

b) a sheet attached to the body, the sheet containing at least one molded fluid channel, the fluid channel being generally arcuate.

2. The cassette of

claim 1

wherein the roller head contains one or more arcuately spaced rollers and the arcuate shape of the fluid channel approximates a radius of the rollers.

3. The cassette of

claim 1

wherein the sheet comprises a molded aspiration fluid channel and a molded irrigation fluid channel.

4. The cassette of

claim 1

wherein the sheet comprises a flexible, easily molded material.

5. The cassette of

claim 4

wherein the sheet comprises silicone rubber or thermoplastic elastomer.

6. The cassette of

claim 1

wherein the fluid channel is planar.

7. The cassette of

claim 1

wherein the fluid channel has at least one transition region.

8. The cassette of

claim 1

wherein the fluid channel has at least one pinch valve site.

9. The cassette of

claim 1

wherein the substrate has at least one molded membrane pressure interface.

10. A peristaltic pump, comprising:

a) a pump roller head, the roller head attached to a rotating shaft and having one or more of rollers with longitudinal axes, the longitudinal axes of the rollers being generally normal to the axis of the shaft;

b) a cassette having a body with an exterior;

c) a sheet attached to the body, the sheet containing at least one molded fluid channel, the fluid channel being held in operative association with the rollers on the roller head.

11. The pump of

claim 10

wherein the fluid channel is arcuate and lies on a plane and the longitudinal axes of the rollers are arranged so that roller contact with the fluid channel is generally parallel with the plane of the fluid channel.

12. The pump of

claim 10

wherein the rollers are generally tapered.