Fluid opening and closing valve

Details Fluid opening and closing valve Fluid opening and closing valve

1996-07-29

1998-03-17

Fox, John

Valves and valve actuation

With means to increase head and seat contact pressure

Spring

137 74, F16K 522

Patent

active

057277710

ABSTRACT:
In a valve for opening and closing a fluid path by rotating a plug in a sleeve made of teflon resin, a plug body and valve stem are connected together. The plug is pressed by a spring to form a seal so that a rotating and opening/closing operation of the plug is smooth. The plug is made in a shape of top cut conical form, wherein contacting protrusions which are formed at both ends of a fluid path are positioned within valve chamber to contact the plug. When a valve sheet of teflon resin is burned by fire, the plug is urged downward so as to closely contact the surfaces of the contacting protrusions so that fluid does not leak around the plug.

REFERENCES:
patent: 1624512 (1927-04-01), Shipley
patent: 1805668 (1931-05-01), Kelley
patent: 3108779 (1963-10-01), Anderson
patent: 3177887 (1965-04-01), Priese
patent: 4345738 (1982-08-01), Ripert
patent: 4531537 (1985-07-01), Smith
patent: 5312086 (1994-05-01), Hollingworth

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