04181151 is referenced by 17 patents and cites 47 patents.

A diaphragm valve includes an apertured diaphragm plate that separates mutually concentric input and output valve chambers. A flexible diaphragm extends somewhat loosely across the plate and seals an operating chamber on one side of the plate. The chamber contains a spring pressed retainer plate having a sealing lip bearing against, but otherwise unsecured to, the diaphragm so that by controlling pressure within the operating chamber, the primary sealing closure is broken and the retainer plate apertures may be progressively blocked or unblocked as the diaphragm moves to and from the diaphragm plate apertures.

Title
Diaphragm valve
Application Number
5/778685
Publication Number
4181151
Application Date
March 17, 1977
Publication Date
January 1, 1980
Inventor
Harold W Ensign
Fullerton
CA, US
Agent
Gausewitz Carr & Rothenberg
Assignee
Cla Val Co
CA, US
IPC
F16K 7/17
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