Control valve

Fluid handling – Self-proportioning or correlating systems – Self-controlled branched flow systems

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Details

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.

REFERENCES:
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patent: 3257910 (1966-06-01), Gates
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patent: 3529512 (1970-09-01), Jones, Jr.
patent: 3661182 (1972-05-01), Loveless
patent: 3948419 (1976-04-01), Polster
1973 Service Manual, GMC Trucks Series 70 Through 9502, Published 1973, by GMC, pp. 1A-50-52.

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