Pump device
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United States of America Patent
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May 26, 1981
Grant Date -
N/A
app pub date -
Sep 12, 1978
filing date -
Sep 12, 1977
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A pump device for intermittently pumping fluid, comprises a pump house having a primary portion and a secondary portion forming a space therebetween. The pump house includes an inlet opening for admitting fluid into the space and an outlet opening. An elastic membrane is disposed in the space between the primary and secondary parts and includes a secondary side facing the inlet and outlet openings. Pulsating pressure waves are applied against the membrane for displacing the membrane such that the secondary side thereof initially closes the inlet opening and thereafter expresses fluid from the space through the outlet opening.
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