Butterfly valve

Details Butterfly valve Butterfly valve

1978-12-08

1980-12-30

Schwadron, Martin P.

Valves and valve actuation

Mechanical movement actuator

Plural dissimilar mechanical movements

744248VA, 251252, 251269, 251306, F16K 3150, F16K 31528

Patent

active

042418976

ABSTRACT:
A butterfly valve made of a synthetic resin comprising; a valve casing, a valve plate, a valve shaft connected to said valve plate, pivoted turnably to said valve casing and having one end thereof protruding into an axial cylinder formed to protrude from said valve casing, and a rotary moving member engaged with the outer circumference of said valve shaft turnably and slidably in the axial direction, retarding the rotation of an operation handle shaft and transmitting it to said valve shaft.

REFERENCES:
patent: 1403056 (1922-01-01), Noble
patent: 1858101 (1932-05-01), McAfee
patent: 2179165 (1939-11-01), Sifkovitz
patent: 2738684 (1956-03-01), Shafer
patent: 2883144 (1959-04-01), Kendig
patent: 2896887 (1959-07-01), Beltz
patent: 3319925 (1967-05-01), Kojima et al.
patent: 3396938 (1968-08-01), Matsui
patent: 3417960 (1968-12-01), Stehlin
patent: 3606801 (1971-09-01), Williams
patent: 3667785 (1972-06-01), Kapeker

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