Double diaphragm pump having two-stage air valve actuator

Details Double diaphragm pump having two-stage air valve actuator Double diaphragm pump having two-stage air valve actuator

1993-07-20

1994-11-29

Bertsch, Richard A.

Pumps

Motor driven

Fluid motor

137338, 91313, F04B 4306

Patent

active

053684524

ABSTRACT:
A double diaphragm pump operated by selectively switching pressurized air into either of two diaphragm chambers; the air actuator valve is a cup valve which is slidable over orifices in a valve plate, and actuable by air pistons; the air pistons are coupled via passageways to a pilot valve which is a second cup valve slidable over orifices in a valve plate, the cup valve being actuable by pins extending into the diaphragm chambers and into contact with diaphragm members at predetermined positions.

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patent: 4895494 (1990-01-01), Gardner
patent: 5277099 (1994-01-01), Powers
patent: 5277555 (1994-01-01), Robinson

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