Apparatus for controlling diaphragm extension in a diaphragm...

Details Apparatus for controlling diaphragm extension in a diaphragm... Apparatus for controlling diaphragm extension in a diaphragm...

F - Mech Eng,Light,Heat,Weapons

04

B

F04B 43/06 (2006.01) F04B 43/00 (2006.01) F04B 43/067 (2006.01)

Patent

CA 2120515

2120515 9307389 PCTABS00021 A diaphragm metering pump having control over diaphragm extension is described. A position sensor (16) is incorporated in a diaphragm metering pump to indicate the relative position of the diaphragm during flexure. When excessive extension of the diaphragm is sensed by the position sensor, a control valve (31) will provide hydraulic fluid from a reservoir (34) for inhibiting further deflection of the diaphragm in the direction in which it was moving. Diaphragm life is extended as well as the accuracy of metering provided by the pump maintained.

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