Fluid handling – Self-proportioning or correlating systems – Supply and exhaust type
Patent
1979-06-07
1981-12-01
Cohan, Alan
Fluid handling
Self-proportioning or correlating systems
Supply and exhaust type
1371163, 137495, F16K 1102
Patent
active
043030882
ABSTRACT:
A normally closed pneumatic valve and regulator assembly having regulator and vent valve spools is actuated by an operator pushbutton to automatically regulate pressure of a fluid provided from a pressure source. The valve assembly automatically vents when the pushbutton is released. A bias spring is operatively positioned between the pushbutton and one of the valve spools. The spring is preloaded by a pair of interlinked hook members which limits the travel of the pushbutton with respect to the valve spool and which maintains the spring in a preloaded condition so as to set a minimum value of regulated pressure. Fluid pressure from the pressure source urges the regulator valve spool into a normally closed position and the vent valve spool into an opened position. Pushing the pushbutton opens the regulator valve and closes the vent valve. The spring acts in opposition to fluid pressure on the combined valve spools to provide a regulated, reduced pressure for fluid exiting the valve. When the pushbutton is released, fluid pressure urges the valve spool into the normally closed position uncovering a vent hole to release pressurized fluid from the valve outlet.
REFERENCES:
patent: 2663393 (1953-12-01), Livermore
patent: 2741263 (1956-04-01), Spencer
patent: 2965120 (1960-12-01), Snyder
patent: 2989971 (1961-06-01), Valentine
patent: 3232306 (1966-02-01), Miller
patent: 3269157 (1966-08-01), Ashley
Forsythe Alan K.
Green Charles J.
Cohan Alan
Sprague Devices, Inc.
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