Spring-loaded valve actuator

Details Spring-loaded valve actuator Spring-loaded valve actuator

1980-03-17

1981-03-31

Schwadron, Martin P.

Valves and valve actuation

Rotary valves

Biased

74523, 74543, F16K 500, F16K 506

Patent

active

042589037

ABSTRACT:
A spring-loaded valve actuator assembly having a hollow handle containing a compression spring urged against a movable piston attached to one end of a cable such that the handle remains in the valve-shut position when the handle is at rest. The other end of the cable is secured to the valve housing at an anchor adjacent to an arcuate guide and is in tension at all times to provide spring compression that normally urges the handle toward the shut position. The handle is connected to a rotatable ball valve contained in a valve housing situated in a conduit pipe fluid line, so that it can rotate the ball valve from the full closed to the full open position. As actuating force on the handle is decreased, the handle moves automatically toward its biased shut position because of the stored compression force of the spring which is constantly exerted against the piston inside the handle.

REFERENCES:
patent: 138580 (1873-05-01), Pigot
patent: 443326 (1890-12-01), Leverich
patent: 772874 (1904-10-01), Donaldson
patent: 3360234 (1967-12-01), Thorburn
patent: 3382733 (1968-05-01), Miller et al.
patent: 3513716 (1970-05-01), Evans
patent: 3690195 (1972-09-01), Wilfert
patent: 3903679 (1975-09-01), Sorenson et al.
patent: 4075907 (1978-02-01), Petrzelka

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