Counterbalanced pump
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United States of America Patent
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-
May 30, 2000
Issued Date -
N/A
app pub date -
Jan 7, 1999
filing date -
Jan 7, 1999
priority date (Note) -
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status (Latency Note)
Importance
Abstract
Fluid is periodically pumped through a motor-driven tubular pump at a substantially constant pumping frequency. The pump includes at least one resiliently reciprocate counterbalancing ring joined to a cooperating spring having a fundamental natural frequency corresponding with the pumping frequency and pumping flowrate is varied independently of the pumping frequency.
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