Diaphragm pump
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United States of America Patent
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-
Feb 12, 1980
Grant Date -
N/A
app pub date -
Apr 13, 1978
filing date -
May 2, 1977
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A diaphragm pump includes a pump chamber, a pressure fluid chamber, a diaphragm partitioning the interior of the pump into the pump chamber and the pressure fluid chamber, a cylinder communicating with the pressure fluid chamber, and a plunger reciprocable within the cylinder. The pressure fluid chamber or the cylinder communicates with a pressure fluid reservoir via a pressure regulating valve adapted to open when the pressure in the pressure fluid chamber is too high, and a valve adapted to open before the pressure in the pressure fluid chamber is too low, and to close when the pressure is restored to a given pressure level.
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