High gain pneumatic switch

Valves and valve actuation – Fluid actuated or retarded – With mechanical movement between actuator and valve

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Details

251 611, F16K 3112

Patent

active

044679980

ABSTRACT:
An amplifying pneumatic switch which is responsive to low pressure signals includes a first chamber for receiving an input signal from a first pneumatic pressure source at a first pressure. The first chamber includes a wall formed by a movable, highly resilient diaphragm. A diaphragm plate is disposed generally coextensive with the diaphragm and is responsive to diaphragm movement. A nozzle is coupled to a second source of pneumatic pressure and is sealable for generating a pneumatic output signal at a second pressure. A sealing mechanism including a lever and a plunger coact between the diaphragm and the nozzle for sealing the nozzle in response to the input signal. A spring is provided for biasing the diaphragm plate to a quiescent position in the absence of an input signal.

REFERENCES:
patent: 2641871 (1953-06-01), Ray
patent: 2675793 (1954-04-01), Ziege
patent: 2770441 (1956-11-01), Grove
patent: 3251573 (1966-05-01), Miller
patent: 3400908 (1968-09-01), Bauer
patent: 3421732 (1969-01-01), Golden
patent: 3433910 (1969-03-01), Pravda
patent: 3761050 (1973-09-01), Puster
patent: 3861642 (1975-01-01), Maddocks
patent: 3897041 (1975-07-01), Cowan
patent: 3918677 (1975-11-01), Cowan

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