Fluid handling – Systems – Supply and exhaust
Patent
1975-05-08
1976-11-30
Cohan, Alan
Fluid handling
Systems
Supply and exhaust
1375961, 137613, 251DIG2, 251298, G05D 1600
Patent
active
039943143
ABSTRACT:
A pressure regulator comprising a regulated pressure chamber and first and second conduits leading to the regulated pressure chamber. The first and second conduits are adapted to communicate with fluid at first and second pressures, respectively. A first valve controls fluid flow between the first conduit and the regulated pressure chamber, and a second valve controls fluid flow between the second conduit and the regulated pressure chamber. The valves are controlled so that the pressure in the regulated pressure chamber can also be controlled. The first valve is subject to failure if the pressure drop across the first valve exceeds a predetermined magnitude, and a pre-regulator controls the pressure in the first conduit to maintain the pressure drop across the first valve no greater than about said first magnitude.
REFERENCES:
patent: 2784740 (1957-03-01), Stageberg
patent: 3007494 (1961-11-01), Herzl
patent: 3211182 (1965-10-01), Gyurik et al.
patent: 3334656 (1967-08-01), Boyle
patent: 3371685 (1968-03-01), Tilney
patent: 3404704 (1968-10-01), Adams
patent: 3455210 (1969-07-01), Allen
patent: 3534774 (1970-10-01), Tennis
patent: 3744517 (1973-07-01), Budzich
patent: 3882896 (1975-05-01), Budzich
Cohan Alan
Michalsky Gerald A.
Peterson Gordon L.
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