Valves and valve actuation – Lost motion between actuator and valve – Lever
Patent
1989-02-07
1990-03-27
Walton, George L.
Valves and valve actuation
Lost motion between actuator and valve
Lever
251 58, 251229, 251298, F16K 3116
Patent
active
049114026
ABSTRACT:
A material handling valve includes a housing having a vertical passageway therethrough and a seating surface extending around the lower end of the passageway. A support arm within the passageway has one end supported on the housing for pivotal movement about a horizontal first axis and has a tipping part at its opposite end. A valve member disposed below the housing is pivotally supported on the support arm. The valve member has on an upper side thereof a sheet of resilient material, and pivotal movement of the support arm moves it between positions in which the resilient sheet is respectively engaging and spaced from the seating surface to respectively obstruct and permit material flow. An actuating arm is pivotally supported about a second axis parallel to the first axis near an upper end of the housing, and a linkage arrangement operatively couples the actuating arm and support arm so that movement of the actuating arm effects pivotal movement of the support arm and valve member. The actuating arm can move to a position in which a spring in the linkage arrangement resiliently yieldably urges the valve member against the seating surface on the housing.
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Blunt William G.
McGlashen Eugene C.
Harborlite Corp.
Walton George L.
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