Peristaltic Pumping System

• US 20080014105A1
• Filed: 04/27/2005
• Published: 01/17/2008
• Est. Priority Date: 04/30/2004
• Status: Active Grant

• Current Assignee: Debiotech S.A.
• Original Assignee: Debiotech S.A.
• Inventors: Junod, Florent, Neftel, Frederic
• Granted Patent: US 8,297,956 B2
• Time in Patent Office: Days
• US Class Current: 417/475
• 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

Abstract

Peristaltic pumping system comprising a flexible tube, a substantially cylindrical rotating roller unit (8,11) containing a series of rollers (11) which are freely rotating around their axes and freely moving along a radial segment, holding means (8) for commonly holding the rollers (11), a central spreader element (5) for pushing the rollers (11) against the flexible tube and a driving unit (1,2) comprising a driving coupling element (1), characterized by the fact that said holding means (8) is made of at least one planar element (8) having retaining and guiding means for rollers (11), said planar element (8) being furthermore adapted to be directly coupled to said coupling element (1,2) in such a way that rollers (11) are driven through said planar element (8).

Claims

1. Peristaltic pumping system comprising a flexible tube, a substantially cylindrical rotating roller unit (8,11) containing a series of rollers (11) which are freely rotating around their axes (7) and freely moving along a radial segment (15), holding means (8) for commonly holding the rollers (11), a central spreader element (5) for pushing the rollers (11) against the flexible tube and a driving unit (1,2) comprising a driving coupling element (1), characterized by the fact that each of said rollers (11) is made of a single part comprising an axis (7) including two ends (12) and a lateral wall (11), said holding means (8) being made of at least one planar element (8) having retaining and guiding means for said axis ends (12), said planar element (8) being furthermore adapted to be directly coupled to said coupling element (1,2) in such a way that rollers (11) are driven through their axis ends (12) and through said planar element (8).

2. Peristaltic pumping system according to claim 1 wherein said holding means is made of two parallel planar elements (8), the rollers (11) being situated between said planar elements (8).

3. Peristaltic pumping system according to claim 1 wherein said spreader element (5) is freely mounted on the distal end of the driving shaft (1).

4. Peristaltic pumping system according to claim 1 wherein said driving coupling element is directly fixed around the basis of the central spreader element to be coupled to the planar element by underneath.

5. Peristaltic pumping system according to claim 4, wherein the driving coupling element comprises centering means adapted to allow a self centering of the driving coupling element.

6. Peristaltic pumping system according to claim 1 wherein said planar element(s) (8) contain(s) a series of holes (13) situated along a circle which is coaxial with respect to the rotating axis of the roller unit (8,11) and wherein said driving unit (1,2) contains at least one pin (3) adapted to be received in one of said holes (13), the pin (3)-hole(13) combination allowing the fixation of the planar element (8) to the driving unit (1,2).

7. Peristaltic pumping system according to claim 6 wherein said holes (13) are adjacent along the circle, allowing thereby always a fixation of the planar element (8) to the driving unit (1,2) when both elements are approached.

8. Peristaltic pumping system according to claim 1 wherein said driving coupling element (1,2) is directly fixed around the periphery of the planar element (8).

9. Peristaltic pumping system according to claim 1 comprising clicking means (14) adapted to maintain the rollers against the flexible tube when the central shaft is withdrawn.