Butterfly valve

Details Butterfly valve Butterfly valve

1980-10-08

1982-11-09

Spiegel, H. Jay

Valves and valve actuation

Rotary valves

Butterfly

251308, F16K 122

Patent

active

043580866

ABSTRACT:
A butterfly valve includes a gasket on the pivotable member which has a peripheral ring portion and two end rings which are concentric to the shaft supporting the pivotable member, each end ring having a flange held under spring pressure between the pivotable member and bushings on the shaft ends. The gasket thus seals the valve against leakage to the outside and to the shaft.

REFERENCES:
patent: 2385510 (1945-09-01), Harwood
patent: 3215400 (1965-11-01), Muller
patent: 3471121 (1969-10-01), Geiselman
patent: 3526385 (1970-09-01), Rohrer
patent: 3697042 (1972-10-01), Killian
patent: 3837620 (1974-09-01), Malloy et al.
patent: 3902697 (1975-09-01), Robinson
patent: 3916943 (1975-11-01), Hester et al.
patent: 3988000 (1976-10-01), Reese
patent: 4025050 (1977-05-01), Manki
patent: 4036469 (1977-07-01), Robinson
patent: 4125248 (1978-11-01), Teramura
patent: 4146206 (1979-03-01), Malloy et al.

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