Fluid handling – Line condition change responsive valves – Direct response valves
Patent
1990-06-22
1991-10-15
Rivell, John
Fluid handling
Line condition change responsive valves
Direct response valves
137529, 137557, 137907, 251 25, F16K 1702
Patent
active
050565559
ABSTRACT:
A first nozzle is connected to a space to be protected from excess pressure. A valve member releaseably seals the first nozzle. A second nozzle is coupled to an adjustable vacuum source for applying a predetermined vacuum level to the valve member to create a force against the member to seal the first nozzle. Seals are between the first and second nozzles and the member which couple the nozzles when the member disengages from the seals. The member disengages from the seals when the force on the member imposed by gas in the space being protected exceeds the force on the member created by the difference between ambient atmospheric pressure and the vacuum source pressure.
REFERENCES:
patent: 2675204 (1954-04-01), Johnson
patent: 3100083 (1963-08-01), Wardrup
patent: 3344807 (1967-10-01), Lehrer et al.
patent: 3422840 (1969-01-01), Bryant et al.
patent: 3689025 (1972-09-01), Kiser
patent: 3835878 (1974-09-01), Braidt et al.
patent: 3905392 (1975-09-01), Gray
patent: 4263935 (1981-04-01), Regnier
patent: 4335744 (1982-06-01), Bey
patent: 4412555 (1983-11-01), Combes
patent: 4598734 (1986-07-01), Moyes
patent: 4779641 (1988-10-01), Charm et al.
patent: 4794940 (1989-01-01), Albert et al.
Rivell John
Squire William
U.S. Philips Corporation
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