System and method for improved flow uniformity in a peristaltic pump mechanism
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United States of America Patent
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Nov 17, 2020
Grant Date -
Feb 11, 2016
app pub date -
Oct 16, 2015
filing date -
Dec 8, 2011
priority date (Note) -
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Abstract
A pumping mechanism includes a plurality of peristaltic pumping actuators to compress adjacent portions of a first portion of an at least partially compressible pumping element having an inlet that is upstream of an outlet. The plurality of pumping actuators further reciprocate at a common drive frequency with a first phase offset between each adjacent pair of pumping actuators. The pumping mechanism also includes one compensation actuator to compress a second portion of the compressible pumping element disposed between the first portion and the outlet. The compensation actuator reciprocates at an optimal displacement and at a modulation frequency that is an integer multiple of the fundamental drive frequency and with a second phase offset between the compensation actuator and the adjacent pumping actuator.
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