Linear to rotary movement valve actuator

Details Linear to rotary movement valve actuator Linear to rotary movement valve actuator

1990-12-20

1992-08-04

Look, Edward K.

Expansible chamber devices

Rectilinearly moving working member and coaxial or parallel...

92 138, 74 99A, F01B 300

Patent

active

051349230

ABSTRACT:
The invention is directed to a pneumatic or hydraulic rotational power drive particularly suited for a ball stopcock type valve, the power drive consisting of a power cylinder being located coaxially to the rotation axis of the cock plug, the piston rod stroke of which is convertible, via a spindal drive, to the rotary movement of a driving member being positively engaged with the cock plug. In such arrangement, the power cylinder may be designed comprising a piston or diaphragm, and for double action, i.e., working in either direction or working solely unidirectional while being reset by means of spring action.

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patent: 3264949 (1966-08-01), Dietlin
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patent: 3417960 (1968-12-01), Stehlin
patent: 3450382 (1969-06-01), Calim
patent: 3776106 (1973-12-01), Pish
patent: 4359932 (1982-11-01), Childers
patent: 4361078 (1982-11-01), Cape et al.
patent: 4504038 (1985-03-01), King
patent: 4651969 (1987-03-01), Dowall

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