Pumps – Expansible chamber type – Elongated flexible chamber wall progressively deformed
Patent
1992-02-19
1993-11-23
Bertsch, Richard A.
Pumps
Expansible chamber type
Elongated flexible chamber wall progressively deformed
F04B 4308
Patent
active
052638316
ABSTRACT:
A peristaltic pump for providing enhanced maintenance of a position of an interface between a substantially flexible tube and at least one roller which compressively engages such tube. In one embodiment, two rollers are incorporated on a rotor and are biased toward a raceway by a pivotal action to substantially totally occlude the tube between the rollers and the raceway. The biasing forces for each roller are provided by a pair of concentrically-positioned helical springs. Each of the springs, acting alone, is individually capable of generating sufficient biasing forces to substantially totally occlude the tube in one aspect of the invention. In another aspect, the force generating capabilities applied to these rollers are also monitored. In this regard, a visual indicator assembly is interconnected, for instance, with the above-identified springs. In the event of any reduction in the force applied to the roller by such springs, which may impair the roller's ability to engage the tube in the desired manner, a visual indication is provided of such a condition.
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Bertsch Richard A.
Cobe Laboratories, Inc.
Koryingy Peter
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