Pressure relief valve

Details Pressure relief valve Pressure relief valve

2005-05-31

2005-05-31

Krishnamurthy, Ramesh (Department: 3753)

Fluid handling

Processes

C137S015180, C137S315270, C137S514000, C137S514300, C137S536000, C251S337000

Reexamination Certificate

active

06899113

ABSTRACT:
A pressure relief apparatus including a housing, a valve disposed in the housing, the valve having a first shoulder, a retainer disposed between the housing and the valve spool, the retainer having a second shoulder, a biasing member disposed between the first and second shoulders, and a metallic seal interface between the housing and the valve. The valve may be constructed with no dynamic elastomeric seals to reduce hysteresis.

REFERENCES:
patent: 1377199 (1921-05-01), Granby
patent: 1960272 (1934-05-01), Lovekin
patent: 2740425 (1956-04-01), Garland
patent: 3084710 (1963-04-01), Gondek
patent: 3550617 (1970-12-01), Johnson
patent: 3626976 (1971-12-01), Kraakman
patent: 3796228 (1974-03-01), Bedo et al.
patent: 4336826 (1982-06-01), Grawunde
patent: 5603348 (1997-02-01), Geringer
patent: 5678604 (1997-10-01), Plauborg et al.
patent: 5871109 (1999-02-01), Litten
patent: 5927323 (1999-07-01), Kikuchi et al.
patent: 6532987 (2003-03-01), Itoh et al.

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