Pressure control device

Details Pressure control device Pressure control device

1998-10-02

2000-06-20

Ferensic, Denise L.

Fluid handling

Line condition change responsive valves

With separate connected fluid reactor surface

137505, 13750518, F16K 3112

Patent

active

060765496

ABSTRACT:
Pressure control device, characterized in that it comprises, in combination with valve means having an open and a closed position and urged to said closed position by a pressure thrust, elastic means opposing the closure of said valve means by exerting thereon an elastic counterthrust opposed to said pressure thrust, said means being normally in a condition of normal strain or stress wherein it creates a first level of elastic counterthrust such as to be overcome by said pressure thrust when it exceeds a first predetermined level; and means for bringing said elastic means to at least another condition of strain or stress, wherein it creates a second level of elastic counterthrust such as to be overcome by said pressure thrust when it exceeds a second predetermined level.

REFERENCES:
patent: 1301405 (1919-04-01), Dexter
patent: 2163597 (1939-06-01), Grove
patent: 2984225 (1961-05-01), Young
patent: 3006362 (1961-10-01), Spence
patent: 3335242 (1967-08-01), Johnson
patent: 3825029 (1974-07-01), Genbauffe
patent: 3911947 (1975-10-01), Boxall
patent: 4573398 (1986-03-01), Johnson et al.
patent: 5218991 (1993-06-01), Gray

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