Valves and valve actuation – Valve – Seats
Patent
1980-01-28
1981-07-07
Ward, Jr., Robert S.
Valves and valve actuation
Valve
Seats
251174, 277236, F16K 2500
Patent
active
042770475
ABSTRACT:
A metallic sealing device for a valve including a fluid passage therein and an inner valve positioned in said fluid passage, which comprises an annular groove having nearly T-shape in section formed around the fluid passage by the valve body and a metallic seat holder fixed thereto and a metallic seat arranged in said annular groove and partially projecting into the fluid passage. The metallic seat consists of a metallic sheet having shoulders formed at the sides to limit the projection of the seat into the fluid passage and an extension of one of said sides extending, in the nearly T-shaped groove at the part opposite to the fluid passage toward the other of said sides, thereby promoting the fluid sealing property as well as elastic property of the metallic seat itself and nullifying the dependency of the sealing property on the fluid flowing direction to utilize the function of the fluid pressure at the time of shutting off the fluid passing through the fluid passage. The metallic seat is formed by press-forming of a single sheet metal, without applying other machining process, and it contacts at its projecting end with the inner valve, thereby achieving superior fluid shut-off performance, good durability, easy machinability or the other advantages by the metal-to-metal contact without using synthetic resin or rubber.
REFERENCES:
patent: 3077331 (1963-02-01), Burtis
patent: 3156445 (1964-11-01), Swain
patent: 3197174 (1965-07-01), Killian
patent: 3208718 (1965-09-01), White
patent: 3335999 (1967-08-01), Lowrey
patent: 3394915 (1968-07-01), Gachot
patent: 3544066 (1970-12-01), Fawkes
Tokyo Koso Kabushiki Kaisha
Ward, Jr. Robert S.
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