Fluid pressure actuated flow control valve

Details Fluid pressure actuated flow control valve Fluid pressure actuated flow control valve

1993-02-17

1995-05-30

Rivell, John

Fluid handling

With repair, tapping, assembly, or disassembly means

With holding means functioning only during transportation...

137556, 251 635, 92128, 921711, F16K 5100, F16K 3700, F01B 2900, F01B 3100

Patent

active

054193613

ABSTRACT:
A valve of the type in which a movable valve member is spring loaded to a normally closed position and operated to an open position by a fluid pressure responsive actuator and wherein the valve closing spring and pressure responsive actuator are enclosed in a removable actuator casing. A spring compressing mechanism is provided which is adjustable to a first condition in which a valve closing spring and pressure responsive actuator are allowed to operate the valve member in the normal fashion and to a second condition in which the spring is compressed sufficient to relieve closing pressure on the valve member and enable safe disassembly of the actuator casing and spring.

REFERENCES:
patent: 809590 (1906-01-01), Watson et al.
patent: 2744719 (1956-05-01), McRae
patent: 2754805 (1956-07-01), Beman
patent: 3112959 (1963-12-01), Kateley
patent: 3141448 (1964-07-01), Candelise
patent: 3175473 (1965-03-01), Boteler et al.
patent: 4423748 (1984-01-01), Ellett
patent: 4774386 (1988-05-01), Frazes
patent: 4881453 (1989-11-01), Armstrong
patent: 4898210 (1990-02-01), Nitta

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