Wedge lock butterfly valve

Details Wedge lock butterfly valve Wedge lock butterfly valve

1995-10-26

1998-04-28

Fox, John

Valves and valve actuation

Rotary valves

Butterfly

251308, F16K 122

Patent

active

057435120

ABSTRACT:
A butterfly valve assembly is disclosed wherein a wedged shaped pin is used to position and fasten the butterfly disc to the valve shaft. The valve shaft, butterfly disc and wedged shaped pin are designed to cooperate in a manner that prevents relative movement between the valve shaft and butterfly disc without the necessity of pre-assembling and drilling the valve shaft and butterfly disc. This allows manufacture and repair without having to maintain the valve shaft and butterfly disc as a matched set. In the preferred embodiment, the butterfly disc has two intersecting apertures, one for insertion of the valve shaft, the other for insertion of a wedged shaped locking pin. The valve shaft is notched such that when it is inserted in the corresponding disc a locking pin with a wedged shaped flat may be inserted through a corresponding disc aperture causing an interference fit between the shaft pin and disc thus locking the disc in position relative to the shaft.

REFERENCES:
patent: 3517689 (1970-06-01), Roos
patent: 4057217 (1977-11-01), MacDonald
patent: 4768750 (1988-09-01), Wilson

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