Fluid handling – Line condition change responsive valves – Direct response valves
Patent
1983-04-13
1984-10-02
Nilson, Robert G.
Fluid handling
Line condition change responsive valves
Direct response valves
1375395, 251332, 251363, F16K 1504
Patent
active
044742088
ABSTRACT:
A safety valve formed of a body with a fluid inlet and outlet and a passageway there between having a reduced diameter port providing an internal radial ledge, a cylindrical seat member supported on the internal ledge, the seat member having a circumferential groove in the upper face, the groove having an inner frusto-conical surface tapering inwardly in the upper direction so that the width of the groove is wider at the top than at the bottom, a toroidal elastomeric seal received in the seat member groove, the lower portion of the seal being configured to correspond to the groove with an integral upwardly extending reduced internal diameter lip portion, a cylindrical seat retainer member engaging the upper end of the seat member to retain it in position and simultaneously engaging a portion of the upper surface of the seal to retain it in the groove, and a spring biased ball member positioned above the seat member permitting so that fluid flow through the valve body when the fluid pressure exceeds a pre-selected level.
REFERENCES:
patent: 2322139 (1943-06-01), Kaelin
patent: 2409220 (1946-10-01), Melichar
patent: 2959188 (1960-11-01), Kepner
patent: 3346008 (1967-10-01), Scaramucci
patent: 3359995 (1967-12-01), Parisi
Baird Manufacturing Company
Nilson Robert G.
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