Diaphragm pump having multiple rigid layers with inlet and outlet check valves
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United States of America Patent
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-
May 11, 1999
Issued Date -
N/A
app pub date -
Feb 13, 1997
filing date -
Oct 7, 1994
priority date (Note) -
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status (Latency Note)
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Abstract
An integral valve diaphragm pump has a first rigid layer, a second rigid layer and a flexible membrane therebetween. Concave surfaces in the two rigid layers form a pump. The pump includes an actuating chamber which is alternately connected to a source of pressure and a source of vacuum. A pump chamber is connected to a fluid source and a fluid receiver through a filling check valve and a dispensing check valve, respectively. Duckbill and spring loaded ball check valves are disclosed.
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