Tube retainer system for a peristaltic pump

• US 7,980,835 B2
• Filed: 01/19/2007
• Issued: 07/19/2011
• Est. Priority Date: 01/19/2007
• Status: Active Grant

• Current Assignee: Masterflex LLC (Avantor, Inc.)
• Original Assignee: Cole-Parmer Instrument Company (Thermo Fisher Scientific Incorporated)
• Inventors: LaBanco, Sam, Reedy, Michael
• Primary Examiner(s): Kramer; Devon C
• Assistant Examiner(s): LETTMAN, BRYAN MATTHEW
• Application Number:
  US11/624,852
• Publication Number:
  US 20080175734A1
• Time in Patent Office: 1,642 Days
• Field of Search: 417/476, 417/477.1, 417/477.12, 417/477.3, 417/477.2, 417/477.4, 417/477.5, 417/477.6, 417/477.7, 417/477.8, 417/477.9, 417/477.11, 417/477.13, 417/477.14
• US Class Current: 417/477.12
• CPC Class Codes: F04B 43/12 having peristaltic action
• 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: F04B 43/1284 Means for pushing the backing-plate against the tubular flexible member

Abstract

A retaining assembly comprising a base and a retainer comprising a wall and a notch in the wall. The notch in the wall has an arcuate first portion and an arcuate second portion that converge at a juncture. The first and second arcuate portions of the notch are oriented toward the base and the retainer is slidably translatable from a first open position to a second closed position with the base.

Claims

1. A peristaltic pump comprising:

a housing;

a rotor assembly supported by the housing; and

a tube retainer for retaining a fluid carrying tube in the peristaltic pump, the tube retainer comprising;

a first wall; and

a first notch in the first wall having an arcuate first portion and an arcuate second portion that converge at a juncture, each of the arcuate first and second portions diverging along a respective entire length thereof in a direction extending away from the juncture;

wherein both of the arcuate first and second portions of the first notch are convex; and

further wherein the arcuate first and second portions are configured to engage and retain the fluid carrying tube within the first notch so as, in use, to prevent slippage of the fluid carrying tube relative to the first notch.

2. The peristaltic pump of claim 1, wherein the juncture is arcuate.

3. The peristaltic pump of claim 1, wherein the arcuate first portion has a length and the arcuate second portion has a length, and further wherein the length of the arcuate first portion is greater than the length of the arcuate second portion.

4. The peristaltic pump of claim 1, wherein the tube retainer further comprises:

a second wall; and

a second notch in the second wall having an arcuate first portion and an arcuate second portion that converge at a juncture, each of the arcuate first and second portions of the second notch diverging along a respective entire length thereof in a direction extending away from the juncture;

wherein both of the arcuate first and second portions of the second notch are convex, and

further wherein the arcuate first and second portions of the second notch are configured to engage and retain the fluid carrying tube within the second notch so as, in use, to prevent slippage of the fluid carrying tube relative to the second notch.

5. The peristaltic pump of claim 4, wherein the arcuate first and second portions of the second notch correspond to the arcuate first and second portions of the first notch.

6. The peristaltic pump of claim 4, wherein the first wall has a top surface and the second wall has a top surface, and further wherein the top surface of the first wall and the top surface of the second wall are inclined toward each other.

7. The peristaltic pump of claim 4, wherein the first wall and second wall are separated by a distance.

8. A peristaltic pump comprising:

a housing;

a rotor assembly supported by the housing; and

a tube retaining system for retaining a fluid carrying tube in the peristaltic pump, the tube retaining system comprising;

a base having a tube engaging surface; and

a retainer comprising;

a wall; and

a notch in the wall having an arcuate first portion and an arcuate second portion that converge at a juncture, each of the arcuate first and second portions diverging along a respective entire length thereof in a direction extending away from the juncture;

wherein the arcuate first and second portions of the notch are oriented toward the base and both of the arcuate first and second portions are convex, the arcuate first and second portions being configured to engage and retain the fluid carrying tube within the notch so as, in use, to prevent slippage of the fluid carrying tube relative to the notch; and

wherein the retainer is slideably translatable from a first open position to a second closed position with the base.

9. The peristaltic pump of claim 8 wherein the retainer is spring biased toward the second closed position with the base.

10. The peristaltic pump of claim 8 wherein the arcuate first portion of the notch has a length and the arcuate second portion of the notch has a length, and further wherein the length of the arcuate first portion is greater than the length of the arcuate second portion.

11. The peristaltic pump of claim 8 wherein the juncture of the notch in the wall of the retainer is arcuate.

12. The peristaltic pump of claim 8 wherein the base further comprises:

a first wall having a first tube engaging surface; and

a second wall having a second tube engaging surface;

wherein the first wall and second walls are separated by a distance forming a channel;

wherein the channel is sufficient to receive the wall of the retainer; and

wherein the first and second tube engaging surfaces are oriented towards the retainer.

13. The peristaltic pump of claim 8 further comprising:

flexible tubing;

wherein the flexible tubing is positioned between the base and the retainer; and

wherein the flexible tubing contacts the tube engaging surface of the base and the arcuate first and second portions of the notch.

14. A peristaltic pump comprising:

a housing;

a rotor assembly supported by the housing; and

a first supported by the housing and comprising;

a first base having a tube engaging surface; and

a first retainer comprising;

a first wall; and

a first notch in the first wall having an arcuate first portion and an arcuate second portion that converge at a juncture, each of the arcuate first and second portions diverging along a respective entire length thereof in a direction extending away from the juncture;

wherein the arcuate first and second portions of the first notch are oriented toward the first base and at least one of the arcuate first and second portions of the first notch is convex, the arcuate first and second portions of the first notch being configured to engage and retain a fluid carrying tube within the first notch; and

wherein the first retainer is slideably translatable from a first open position to a second closed position with the first base.

15. The peristaltic pump of claim 14 further comprising:

a second supported by the housing and comprising;

a second base having a tube engaging surface; and

a second retainer comprising;

a second wall; and

a second notch in the second wall having an arcuate first portion and an arcuate second portion that converge at a juncture, each of the arcuate first and second portions diverging along a respective entire length thereof in a direction extending away from the juncture;

wherein the arcuate first and second portions of the second notch are oriented toward the second base and at least one of the arcuate first and second portions of the second notch is convex, the arcuate first and second portions of the second notch being configured to engage and retain the fluid carrying tube within the second notch; and

wherein the second retainer is slideably translatable from a first open position to a second closed position with the second base.

16. The peristaltic pump of claim 15 wherein the first tube retaining system is aligned with the second and separated therefrom by a distance.

17. The peristaltic pump of claim 16 wherein the first retainer of the first and the second retainer of the second are slideably translatable toward each other.

18. The peristaltic pump of claim 14 wherein the arcuate first and second portions of the first notch are both convex.

19. The peristaltic pump of claim 15 wherein the arcuate first and second portions of the second notch are both convex.