Double gated valve

Details Double gated valve Double gated valve

1991-03-14

1992-03-10

Fox, John C.

Fluid handling

Systems

Flow path with serial valves and/or closures

13761421, 251328, F16K 300

Patent

active

050942700

ABSTRACT:
There is disclosed a gate valve having a pair of side-by-side through conduit gates which are adapted to be reciprocated relatively to one another by a fail safe actuator of such construction as to move the upstream gate to closed position before the downstream gate and the downstream gate to open position before the upstream gate.

REFERENCES:
patent: 759448 (1904-05-01), Kiser
patent: 2749940 (1952-03-01), Bronson, II
patent: 3003742 (1961-10-01), Kearns
patent: 4193574 (1980-03-01), Barnes et al.
patent: 4275763 (1981-06-01), Fahrig
patent: 4294284 (1981-10-01), Herd
patent: 4499919 (1985-02-01), Forester
patent: 4524796 (1985-06-01), Ayers, Jr. et al.
patent: 4645179 (1987-02-01), Ali
patent: 4824074 (1989-04-01), Baugh

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