Pressure relief valve and cryopump utilizing the same

Details Pressure relief valve and cryopump utilizing the same Pressure relief valve and cryopump utilizing the same

1991-12-02

1992-08-11

Rivell, John

Fluid handling

Line condition change responsive valves

Direct response valves

137542, 251900, F16K 1506, F16K 2500

Patent

active

051370506

ABSTRACT:
A self-cleaning pressure relief valve has a spring-biased valve closure with an annular contact edge which makes contact with an o-ring to seal the valve. The annular contact edge is slightly larger in radius than the central radius of the o-ring so that changing pressure on the closure causes the contact edge to slide along the surface of the o-ring.

REFERENCES:
patent: 1170412 (1916-02-01), Campbell
patent: 2072271 (1937-03-01), Meadows
patent: 2364812 (1944-12-01), Pierson
patent: 2599622 (1952-06-01), Folmsbee
patent: 2621885 (1952-12-01), Schmitt
patent: 2624542 (1953-01-01), Ghormley
patent: 2650793 (1953-09-01), Clark, Jr. et al.
patent: 3208758 (1965-09-01), Carlson et al.
patent: 4303251 (1981-12-01), Harra et al.
patent: 4655046 (1987-04-01), Eacobacci et al.
patent: 4674530 (1987-06-01), Bickford
patent: 4697617 (1987-10-01), Bourke et al.
"Del-Seal" Ultra-High Vacuum Flanges, technical data sheet of MDC Manufacturing, date unknown.

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