Safety valves

Details Safety valves Safety valves

1990-01-08

1990-10-16

Rivell, John

Fluid handling

With lock or seal

251291, 251327, F16K 3506, F16K 302

Patent

active

049627856

ABSTRACT:
A gate valve comprising housing walls secured together in face to face relationship, a gate plate reciprocable between an upper open position wherein the gate plate is oriented for allowing the flow of fluid and a lower closed position wherein the gate plate is oriented for precluding the flow of fluid. Locking components are provided and comprise a first arm laterally offset from one housing wall and a second arm laterally offset from the gate plate for movement therewith. Each arm has a hole therethrough, the holes being in alignment when the gate plate is in the lower closed position. A pad lock is positionable through the holes for securing the gate plate against being raised to the upper open position when the gate plate is locked in the lower closed position.

REFERENCES:
patent: 830411 (1906-09-01), Butchart
patent: 1986128 (1935-01-01), Trott
patent: 2986370 (1961-05-01), Girton
patent: 3448762 (1969-06-01), Schmitt
patent: 4231389 (1980-11-01), Still et al.
patent: 4257447 (1981-03-01), Clarkson
patent: 4325534 (1982-04-01), Roark et al.

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