Variable seat check valve

Details Variable seat check valve Variable seat check valve

1976-08-16

1978-05-02

Nilson, Robert G.

Fluid handling

Line condition change responsive valves

Direct response valves

13751629, 251332, F16K 1504

Patent

active

040869369

ABSTRACT:
Apparatus for use in a reciprocating pump wherein a one-way check valve opens to admit fluid from a reservoir during the pump upstroke and a second one-way check valve opens to expel fluid from the pump during the downstroke. The apparatus includes a valve seat having a frusto-conical shape and formed from resilient material, and a spherical metallic ball, together with a rigid seat edge liner for restricting the seat resilient expansion. In operation, the invention enables the check valve in the check position to automatically compensate for excessive forces against the ball by distributing these forces over a variable spherical ball/seat surface to provide a predetermined maximum pressure on the valve seat.

REFERENCES:
patent: 639403 (1899-12-01), Klopp
patent: 1764186 (1930-06-01), Teesdale
patent: 2223509 (1940-12-01), Brauer
patent: 2371293 (1945-03-01), Hoof
patent: 3126028 (1964-03-01), Kurfiss
patent: 3134572 (1964-05-01), Glasgow
patent: 3323560 (1967-06-01), Ehlers
patent: 3324880 (1967-06-01), Roberts
patent: 3327991 (1967-06-01), Wallace

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