Valve mechanism incorporating universal seat spring

Valves and valve actuation – With means to increase head and seat contact pressure – Seat pressed to valve

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Details

251315, 29173, 267161, F16K 2500

Patent

active

042733090

ABSTRACT:
A valve mechanism according to the present invention incorporates at least one movable valve seat that is received within a seat pocket of the valve body and establishes sealing engagement with a movable valve element. An annular universal seat spring formed of a material such as standard carbon steel is deformed from a generally flat configuration to a frusto-conical configuration during assembly of the valve and exerts a force urging the valve seat against the valve element. Depending upon the depth of the seat pocket, the length of the valve seat and the size or thickness of the valve element, the seat spring will be deformed within its elastic limits or beyond the elastic limits of the material thereof, whereupon it will take a permanent set. In either case, the seat spring compensates for tolerance variations and exerts a spring force within a preselected narrow force range to ensure effective sealing capability and low torque operation.

REFERENCES:
patent: 2174171 (1939-09-01), Wasson
patent: 2211760 (1940-08-01), Berg
patent: 2860869 (1958-11-01), Utvitch
patent: 3091428 (1963-05-01), Magos
patent: 3774896 (1973-11-01), Rode
patent: 3794291 (1974-02-01), Suyama
patent: 3883112 (1975-05-01), Milleville
patent: 3964737 (1976-06-01), Schober

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