Fluid handling – Self-proportioning or correlating systems – Self-controlled branched flow systems
Patent
1989-11-06
1990-10-30
Cohan, Alan
Fluid handling
Self-proportioning or correlating systems
Self-controlled branched flow systems
137489, 1374925, G05D 1600
Patent
active
049661833
ABSTRACT:
A gas pressure regulator with an inlet, outlet and a main valve operated by a diaphragm to vary the extent of its opening to produce at the outlet an output of compressed gas at a pressure which is reduced from the inlet pressure and closely regulated to a substantially constant value. One side of the diaphragm is enclosed by a first dome which continously communicates with the outlet and the other side of the diaphragm is enclosed by a second dome which continuously communicates with a relief valve. To change the output pressure, the pressure at which the relief valve opens can be varied and adjusted either manually or by an electromechanical actuator. To cause the diaphragm to produce a control force for moving the valve, a restricted orifice communicates with both domes to bleed compressed gas from the first dome into the second dome and is preferably carried by the diaphragm. Preferably, the domes are also connected through a manually closed by-pass valve which opens when the pressure in the first dome tends to exceed that required to fully close the main valve.
REFERENCES:
patent: 2918081 (1959-12-01), Lauer
patent: 3204657 (1965-09-01), Boyd
patent: 3488685 (1970-01-01), Hughes
patent: 3705599 (1972-12-01), Steward
patent: 3971410 (1976-07-01), St. Clair
patent: 4171004 (1979-10-01), Cerrato
Cohan Alan
Master Pneumatic-Detroit, Inc.
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