Valves and valve actuation – Lost motion between actuator and valve – Overload release
Patent
1986-01-29
1986-10-28
Schwadron, Martin P.
Valves and valve actuation
Lost motion between actuator and valve
Overload release
251 79, 403 36, F16K 3144
Patent
active
046194371
ABSTRACT:
Disclosed is a torque limiting valve handle having one more independently adjustable spring loaded balls urged in contact with depressions formed in the inside surface of a housing adapted for external manual engagement. The adjustment of the torque limit setting of the valve handle is protected from tampering or inadvertent modification by unauthorized personnel by the access to the adjustment requiring disassembly of the parts. One embodiment provides a torque lock in one direction of rotation. Another embodiment provides a torque limit override feature in either direction of rotation by an axial displacement of the housing of the handle with respect to an adaptor fixedly secured to the valve stem of the valve to which it is secured.
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Purkey Richard E.
Williams William J.
Fox John C.
Schwadron Martin P.
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