Fluid handling – Self-proportioning or correlating systems – Self-controlled branched flow systems
Patent
1980-03-10
1981-09-08
Schwadron, Martin P.
Fluid handling
Self-proportioning or correlating systems
Self-controlled branched flow systems
13762569, 13750513, 13750514, 137495, 91 7, G05D 1100
Patent
active
042879060
ABSTRACT:
A multi-function valve device for controlling the operation of a pneumatically-driven motor. A spring-biased linkage couples a cam-operated push pin to a valve spool assembly. The valve spool assembly coaxially combines the movable elements of a pressure regulator valve, a run valve, and a park valve into a single unit slidable axially within the valve housing and positioned by the spring-biased linkage. The pressure regulator valve permits an increasing pressure to be applied to a slowed or stopped pneumatic motor, approaching the pressure of the pneumatic source to aid in restarting the motor or to provide the additional force necessary to drive a heavily loaded motor. Automatic park and shutoff functions are also provided.
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1973 Service Manual, GMC Trucks Series 70 Through 9502, Published 1973, by GMC, pp. 1A-50-52.
Forsythe Alan K.
Green Charles J.
Schwadron Martin P.
Spiegel H. Jay
Sprague Devices, Inc.
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