Valves and valve actuation – With means to increase head and seat contact pressure – With positive reduction
Patent
1990-03-27
1990-10-16
Walton, George L.
Valves and valve actuation
With means to increase head and seat contact pressure
With positive reduction
251172, 251174, 251177, 251301, F16K 2500, F16K 118
Patent
active
049629115
ABSTRACT:
The present invention is directed to an improved valve comprising a valve housing, a fluid path therethrough, a seat disposed about the fluid path, a rotatable, curved wedge disposed in the fluid path, an actuator for rotating the wedge between its closed and opened positions and a fixed member for displacing the wedge longitudinally toward the seat as it is rotated between its opened and closed positions. Preferably, the seat is biased toward the hemi-wedge. The rotatable, curved wedge has a curved sealing surface for cooperation with the seat. The wedge includes a bore through its thinner end forming a part of the fluid flow path when opened while its thicker end blocks the fluid flow path in the closed position. The sides of the wedge are curved, one side providing a convex sealing surface and the other side providing a concave thrust surface. Rotation of the hemi-wedge from the opened to the closed position displaces the sealing surface thereof toward the seat while maintaining the same relative orientation between the sealing surface and the seat.
REFERENCES:
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patent: 3123334 (1964-03-01), Hitz
patent: 3404864 (1968-10-01), Reddy
patent: 3521855 (1970-07-01), Jensen
patent: 3799188 (1974-03-01), Chronister
patent: 4130268 (1978-12-01), Kojima et al.
patent: 4253485 (1981-03-01), Legille
patent: 4319734 (1982-03-01), Acar
patent: 4477055 (1984-10-01), Partridge
Soderberg Research & Development, Inc.
Walton George L.
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