Valves and valve actuation – Fluid actuated or retarded – With mechanical movement between actuator and valve
Patent
1997-05-20
1999-10-19
Walton, George L.
Valves and valve actuation
Fluid actuated or retarded
With mechanical movement between actuator and valve
74110, 74516, 74520, 74522, 251232, 251279, 251280, F16K 31122, F16K 3144
Patent
active
059674865
ABSTRACT:
A valve actuator having a pivotal cam-lever driven push-pull mechanical linkage system. A power mechanism moves a cam-lever member which then moves a connecting rod to move a push-pull member to lift out or push in a conventional valve stem. This then opens or closes the valve. In an alternative embodiment, the actuator includes an adjustable block member to which the cam-lever is pivotally attached. This provides a separate adjustability for the ultimate maximum movement of the push-pull member and thereby also of the valve stem in order to ensure a proper closing force is imparted to the valve. Also in this embodiment, it is preferred that the push-pull member includes at least one spring washer disposed therein. This provides a desirable compressibility in the system during the imposition of the force that the push-pull member exerts on the valve stem during the opening and/or closing process.
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McCrory Gene A.
Rehder David L.
Scull Peter B.
Walton George L.
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