Valves and valve actuation – With means to increase head and seat contact pressure – With positive reduction
Patent
1986-11-12
1987-10-20
Schwadron, Martin P.
Valves and valve actuation
With means to increase head and seat contact pressure
With positive reduction
49488, 251203, 251329, 251368, F16K 314
Patent
active
047009276
ABSTRACT:
A slide gate has a frame made up of parallel channel guides extending vertically from and cooperating with a horizontal bottom to define a gate opening. The channel guides each have mutually spaced first and second guide flanges protruding laterally into the gate opening. A gate disc is supported by the frame for vertical movement between a lowered position resting on the frame bottom and closing off the gate opening, and an open position spaced thereabove. The gate disc has side portions received between the first and second guide flanges of the channel guides, and these side portions carry seal assemblies. A plurality of vertically spaced pivotal pressure pads are mounted on each of the channel guides between their respective first and second guide flanges. Adjustable mechanisms are employed to pivotally adjust the pressure pads to bear against the disc side portions when the disc is in its lowered position, with the result that the seal assemblies are compressed between the disc side portions and the first guide flanges.
REFERENCES:
patent: 1979490 (1934-11-01), Robertson
patent: 2560308 (1951-07-01), Spraragen
patent: 3319425 (1967-05-01), Andrae
patent: 3351180 (1967-11-01), Herzog et al.
patent: 3704722 (1972-12-01), Coleman
patent: 3760593 (1973-09-01), Whipps
patent: 3980094 (1976-09-01), Schroder et al.
patent: 4131131 (1978-12-01), Frisch
Hepperle Stephen M.
Rodney Hunt Company
Schwadron Martin P.
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