Positive pullback synchro valve actuator

Details Positive pullback synchro valve actuator Positive pullback synchro valve actuator

1986-01-23

1987-01-13

Walton, George L.

Valves and valve actuation

Mechanical movement actuator

Plural dissimilar mechanical movements

74 25, 74 89, 74568FS, 251251, 251263, 251305, F16K 31524

Patent

active

046358986

ABSTRACT:
The improved positive pullback synchro valve actuator of the present invention comprises a universal cam assembly having a frame supporting a deformable cam strip which is operatively connected to a plurality of contour adjustment screws and which may be adjusted to form the desired shape of the cam. The cam strip is further operatively connected to a plunger which is disposed for movement transversely of the cam strip and in the longitudinal direction. The apparatus is positive in its pullback, as the plunger is linked to the universal cam assembly, such that when the operator turns the universal cam assembly, there is assurance that the associated valve is closed. In some applications, the plunger may be connected to a shaft yoke which is disposed transversely of the plunger for converting the longitudinal movement into limited reciprocal rotational movement. In these embodiments, the shaft yoke engages a valve shaft which is urged by such yoke into limited reciprocal rotational movement. In such embodiments, a butterfly valve disc may be connected to the valve shaft for opening and closing the butterfly valve with respect to a butterfly valve seat.

REFERENCES:
patent: 2315171 (1943-03-01), Voorheis
patent: 3352167 (1967-11-01), Winters
patent: 3706438 (1972-12-01), Condon et al.
patent: 3792408 (1974-02-01), Gorgens et al.

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