Butterfly valve

Details Butterfly valve Butterfly valve

1996-01-04

1998-01-20

Rivell, John

Fluid handling

Line condition change responsive valves

Direct response valves

137527, 181226, F16K 1503, F01N 108

Patent

active

057092419

ABSTRACT:
A butterfly valve adapted to be arranged in a pipe through which fluid can flow, the pipe having an axis and an outlet end, the valve comprising a valve shaft having an axis eccentric to the pipe axis, and a valve element integrally supported by the valve shaft. The valve is opened by a fluid pressure acting on the valve element. A part of the valve element on one side of the valve shaft has a tip portion bent along a pleat line substantially parallel to the shaft axis toward the upstream side of a fluid flow. The valve is arranged at the outlet end of the pipe to form a clearance between the valve element part around the pleat line and the outlet end of the pipe, to thereby allow the fluid to flow out through the clearance, when the valve opens from a closed position thereof.

REFERENCES:
patent: 386461 (1888-07-01), Goll
patent: 1330265 (1920-02-01), Hinton
patent: 3274917 (1966-09-01), Tolbert, Sr.
patent: 3327732 (1967-06-01), Deve
patent: 3352318 (1967-11-01), Yanowitz
patent: 4609068 (1986-09-01), Backlund
patent: 4699244 (1987-10-01), Bergluist et al.
patent: 5355673 (1994-10-01), Sterling et al.

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