Valves and valve actuation – Lost motion between actuator and valve
Patent
1995-03-27
1997-03-18
Michalsky, Gerald A.
Valves and valve actuation
Lost motion between actuator and valve
25112912, 251159, 251163, 251174, F16K 322
Patent
active
056115164
ABSTRACT:
In a preferred ball-valve construction, a valve body has spaced inlet and outlet ports on an axis of flow that is controlled by an interposed ball; the ball is rotatable about a body-fixed axis which intersects the axis of flow at the geometric center of the ball. In the closed condition of the valve, an annular valve-seat member associated with one of the ports has circumferentially sealed contact with the ball. The annular valve-seat member is guided for axial displaceability into and out of its engageability with the ball, and actuation of the valve utilized coordination of valve-seat displacement with ball rotation such that valve-seat engagement with the ball is only for the closed condition of the valve, and such that, valve-opening rotation of the ball can occur only while the annular valve-seat member is in axial-clearance relation with the ball. Various embodiments are disclosed.
REFERENCES:
patent: 3007490 (1961-11-01), Passmore
patent: 3245653 (1966-04-01), Lavigueur
patent: 3404864 (1968-10-01), Reddy
patent: 3830693 (1974-08-01), Beser et al.
patent: 4676480 (1987-06-01), Garceau et al.
patent: 5228645 (1993-07-01), Reinicke
patent: 5247964 (1993-09-01), DeLange
patent: 5333833 (1994-08-01), Reinicke
Cardin Joseph M.
Dalene Arnold
Reinicke Robert H.
Marotta Scientific Control, Inc.
Michalsky Gerald A.
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