Butterfly valve

Details Butterfly valve Butterfly valve

1980-11-21

1982-02-02

Spiegel, H. Jay

Valves and valve actuation

With means to increase head and seat contact pressure

With positive reduction

251 58, 251228, 251248, 251305, F16K 2500

Patent

active

043135927

ABSTRACT:
A butterfly valve includes an annular valve seat and a disc-like valve member mounted both for rotation about an axis parallel to the valve seat and for axial displacement relative to the seat. The actuating mechanism automatically effects sequential motion of the valve member, first to rotate it to closed position and to shift it into sealed engagement against the valve seat, and vice versa, and includes structure which self-locks in the latter position.

REFERENCES:
patent: 1740041 (1929-12-01), Schmidt
patent: 2811981 (1957-11-01), Harris
patent: 2833511 (1958-05-01), Fletcher
patent: 2934310 (1960-04-01), Kinney et al.
patent: 3272223 (1966-09-01), Sass
patent: 3776505 (1973-12-01), Nakanishi
patent: 3931955 (1976-01-01), Jacobs

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