Control valve for bleeding fluid actuator

Details Control valve for bleeding fluid actuator Control valve for bleeding fluid actuator

1976-12-20

1978-02-21

Weakley, Harold W.

Fluid handling

Systems

Multi-way valve unit

13762567, 251DIG1, 251324, F16K 3100

Patent

active

040747026

ABSTRACT:
A control valve for bleeding fluid from a valve actuator has a slide valve with a piston on one end thereof mounted for movement within a uniform diameter piston chamber. The piston is movable longitudinally within the piston chamber between a seated position at an outer end of the piston chamber and an unseated set position adjacent the opposite inner end of the chamber. An O-ring is positioned in an annular groove in the inner wall defining the piston chamber adjacent the inner end of the piston chamber and contacts the outer periphery of the piston in fluid-tight sealing relation when the piston is in a raised unseated position adjacent the inner end of the piston chamber. The outer periphery of the piston is spaced from the adjacent inner wall of the piston chamber to permit fluid to pass between the piston and the wall when the piston is out of contact with the O-ring.

REFERENCES:
patent: 2524142 (1950-10-01), Seeloff
patent: 2556308 (1951-06-01), Weatherhead
patent: 2621885 (1952-12-01), Schmitt
patent: 3902663 (1975-09-01), Elmer
patent: 3943974 (1976-03-01), Connelly

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