Valves and valve actuation – Fluid actuated or retarded – With mechanical movement between actuator and valve
Patent
1979-10-17
1981-09-08
Schwadron, Martin P.
Valves and valve actuation
Fluid actuated or retarded
With mechanical movement between actuator and valve
251 62, 251203, 251231, 405105, 405106, 74520, F16K 31122
Patent
active
042880599
ABSTRACT:
Apparatus for controlling fluid flow through a gate opening includes frame means that define the opening, and guide means which are adapted to retain a gate disc in slidable relation with the opening. Drawing means for laterally displacing the disc relative to the opening are pivotably connected to lever means having long and short ends. A fulcrum between the ends is pivotably connected to the disc. The short end is disposed to bear against a fixed portion of the guide means when the disc is closed, and the long end is connected to the drawing means to obtain a mechanical advantage in drawing pressure when displacing the disc to a partially open position. The lever means may be a single lever, but a preferred embodiment discloses a pair of levers to apply a uniform drawing pressure on the disc via a hydraulic cylinder that is anchored in a wall of a closed tank which contains the apparatus. A piston rod of the cylinder faces outwardly of the tank to avoid contamination and subsequent corrosion and is connected to the lever means by rods which are slidably sealed in passages leading through the wall.
REFERENCES:
patent: 1047506 (1912-12-01), Dawson
patent: 1482836 (1924-02-01), Brubaker et al.
patent: 2386589 (1945-10-01), Caldwell
patent: 2487185 (1949-11-01), Schofield
patent: 2490555 (1949-12-01), Songer
patent: 2503469 (1950-04-01), Caldwell
patent: 2643521 (1953-06-01), Hatch
patent: 4028896 (1977-06-01), Whipps
patent: 4070863 (1978-01-01), Brown
Sakovich Michael M.
Schwadron Martin P.
Walton G. L.
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