Pneumatic pressure control valve

Details Pneumatic pressure control valve Pneumatic pressure control valve

1977-07-18

1978-12-26

Cohan, Alan

Fluid handling

Systems

Supply and exhaust

13762564, 137 82, G05B 1148, F16K 1114

Patent

active

041311302

ABSTRACT:
A pneumatic control valve of the flapper type for controlling the resultant pneumatic pressure within a chamber from two sources of pressure in proportion to an electrical control signal is disclosed, wherein two flappers, one associated with a nozzle connected with one of said sources and the other associated with a nozzle connected with the other thereof, are resiliently coupled to a common electrically actuated armature such that at least at extreme controlled pressure rates, the resilient coupling permits one flapper to close its nozzle while permitting the other to continue to control the pressure rate from the other nozzle whereby to permit reducing the flapper-nozzle gap and to enlarge the nozzle area resulting in a very high valve gain and at the same time reducing quiescent pneumatic mass flow and increasing the transient pneumatic mass flow capability through said valve.

REFERENCES:
patent: 3712339 (1973-01-01), Bartholomaus
patent: 3874405 (1975-04-01), Thayer

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