Butterfly-valve

Details Butterfly-valve Butterfly-valve

1981-06-30

1983-10-25

Schwadron, Martin P.

Valves and valve actuation

Rotary valves

Butterfly

F16K 122

Patent

active

044114052

ABSTRACT:
A butterfly valve comprises a closure member 8 having a warped curve periphery pivotably disposed within a tubular body 1. An elastic seal and a cooperating seat are provided on the closure member and tubular body, respectively, or vice versa. At each point of a mean line of seat, a plane T tangent to the seat forms a roughly constant acute angle x of 20.degree. to 30.degree. with a tangent t to the path of the corresponding point of the closure member at the point of contact of the seal and seat.

REFERENCES:
patent: 2278421 (1942-04-01), Brown
patent: 2980388 (1961-04-01), White
patent: 3078069 (1963-02-01), Broadbent
patent: 3448465 (1969-06-01), Pierce et al.
patent: 3680833 (1972-08-01), McNeely, Jr.
patent: 4154426 (1979-05-01), Santy et al.

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