Gate valve

Details Gate valve Gate valve

1993-09-21

1994-07-26

Schwadron, Martin P.

Fluid handling

Systems

Flow path with serial valves and/or closures

13761421, 251328, F16K 300

Patent

active

053320026

ABSTRACT:
There is disclosed two embodiments of a gate valve having a pair of parallel-sided gates for opening and closing a flowway through the valve body upon reciprocation within a gate cavity intersecting the flowway intermediate its ends. The gates are connected to an actuator stem by a lost motion connection which causes one to be moved from closed toward open position prior to the other, and the one gate has a passageway therein for moving into a position to connect the cavity with the flowway prior to movement of the gates together toward open position.

REFERENCES:
patent: 3152760 (1964-10-01), Bowman
patent: 3194269 (1965-07-01), Williams
patent: 4824074 (1989-04-01), Baugh
patent: 4856551 (1989-08-01), Brakelmann
patent: 5037064 (1991-08-01), Pond
patent: 5094270 (1992-03-01), Reimert
patent: 5135032 (1992-08-01), Parks, Jr.

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