Non-rolling type peristaltic pump having pressure plate mounted

Details Non-rolling type peristaltic pump having pressure plate mounted Non-rolling type peristaltic pump having pressure plate mounted

1996-10-18

1997-11-04

McAndrews, Roland

Pumps

Expansible chamber type

Elongated flexible chamber wall progressively deformed

F04B 4312

Patent

active

056832338

ABSTRACT:
A peristaltic pump for pumping liquids through a resilient tube. The pump includes a platen against which a resilient tube is placed. A cam assembly is positioned adjacent to the platen and tube. A plurality of pump fingers are mounted between tube and cam assembly in a manner permitting movement of the pump fingers toward and away from the tube. As the cam assembly rotates, the fingers are pressed toward the tube sequentially so as to pump liquid through the tube. The pump finger ends should press the tube sufficiently to at least nearly occlude the tube and prevent back flow without over pressing and damaging the tube. A transverse pinch finger is provided in a cavity in the platen opposite each pump finger, with a tip on each finger spring biased to extend from the tube pressing face of the platen. At the tube occluding position, the pump finger nearly occludes the tube and the pinch finger completes occlusion without pressing the tube beyond the fully occluded position.

REFERENCES:
patent: 2861652 (1958-11-01), Small
patent: 4648812 (1987-03-01), Kobayashi et al.
patent: 4671792 (1987-06-01), Borsanyi
patent: 4893991 (1990-01-01), Heminway et al.
patent: 5575631 (1996-11-01), Jester et al.

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