Nonjamming vacuum valve having tapered plunger

Details Nonjamming vacuum valve having tapered plunger Nonjamming vacuum valve having tapered plunger

1990-08-30

1992-01-21

Michalsky, Gerald A.

Valves and valve actuation

Fluid actuated or retarded

Flexible wall expansible chamber reciprocating valve actuator

137205, 1372361, 137907, F16K 31126

Patent

active

050822381

ABSTRACT:
A vacuum valve having a substantially tapered plunger for use in a vacuum operated sewerage transport system, the valve capable of facilitating a flow rate of thirty gallons per minute. It will not jam in the open or semi-open position as a result of repetitive cycling of the valve by the associated control unit. The plunger is mounted at one end of an axially disposed shaft of a piston operator in the valve chamber, which is effectively sealed to prohibit air leakage into a vacuum pressure conduit when the valve is in the closed position. Additional sealing elements are required and are designed to seal all liquids from entering the chambers containing the piston driving means or its associated control unit.

REFERENCES:
patent: 2504057 (1950-04-01), Trefil
patent: 3476147 (1969-11-01), Hitt et al.
patent: 3762384 (1973-10-01), Day et al.
patent: 3807431 (1974-04-01), Svanteson
patent: 3824033 (1974-07-01), Chacour
patent: 4009865 (1977-03-01), Davlin
patent: 4171853 (1979-10-01), Cleaver et al.
patent: 4223701 (1980-09-01), Bible et al.
patent: 4674464 (1987-06-01), Akagi
patent: 4732192 (1988-03-01), Shen
patent: 4782811 (1988-11-01), Hewette
patent: 4826132 (1989-05-01), Moldenhauer

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