Actuator for a rotary valve

Details Actuator for a rotary valve Actuator for a rotary valve

1992-08-27

1993-12-14

Walton, George L.

Valves and valve actuation

Mechanical movement actuator

Plural dissimilar mechanical movements

74 182, 74 23, 74 57, 251214, 251252, 2513353, F16K 31528

Patent

active

052694925

ABSTRACT:
A hermetically-sealed actuator for a rotary valve is provided in which a valve operator is operative to move a stem axially, axial movement of the stem, in turn, producing rotation of a rotary cam member that is operatively connected to rotate a valve spindle, the axially movable stem being hermetically sealed by a bellows mechanism, thus hermetically isolating the rotary cam member from the valve operator, the maximum angular extent of rotation of the cam member being determined by the ramp cam angle and angular extent of helical slots formed in the rotary cam member and which are engaged by trunnions fast with the stem.

REFERENCES:
patent: 1155576 (1915-10-01), Isley
patent: 1987135 (1935-01-01), Sugden
patent: 3096966 (1963-07-01), McFarland, Jr.
patent: 3184214 (1965-05-01), King
patent: 3399695 (1968-09-01), Stehlin
patent: 3811651 (1974-05-01), Gallagher et al.
patent: 4120479 (1978-10-01), Thompson et al.
patent: 4293117 (1981-10-01), Mueller
patent: 4350322 (1982-09-01), Mueller
patent: 4468002 (1984-08-01), Tremblay
patent: 4586693 (1986-05-01), Tinner

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