Linear peristaltic pump

Details Linear peristaltic pump Linear peristaltic pump

1996-11-18

1999-07-20

Thorpe, Timothy

Pumps

Expansible chamber type

Elongated flexible chamber wall progressively deformed

604153, F04B 4308

Patent

active

059248521

ABSTRACT:
A peristaltic pump for pumping liquids through a resilient tube. In one embodiment, the pump includes a curved concave platen against which a resilient tube is placed. A multi lobed cam is positioned adjacent to the platen and tube. A plurality of pump fingers are mounted between tube and cam in a manner permitting radial movement of the pump fingers. As the cam rotates, the fingers are pressed toward the tube sequentially so as to pump liquid through the tube. The lobe end should press the tube sufficiently to occlude the tube and prevent back flow without over pressing and damaging the tube. A transverse pinch finger is provided on each pump finger, extending from the tube pressing face of each pump finger. 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. A fixed or slidable spring pressed pinch finger may be used. In a second embodiment, the pump fingers also include pinch fingers and are moved toward and away from a planar platen by a plurality of cams mounted transversely on a rotatable shaft. The pinch fingers operate in the same manner as in the first embodiment.

REFERENCES:
patent: 2393838 (1946-01-01), Tarbox
patent: 3127845 (1964-04-01), Voelcker
patent: 3518033 (1970-06-01), Anderson
patent: 5092749 (1992-03-01), Meijer

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