Valves and valve actuation – With means to increase head and seat contact pressure – Seat pressed to valve
Patent
1995-08-31
1996-08-27
Fox, John C.
Valves and valve actuation
With means to increase head and seat contact pressure
Seat pressed to valve
251188, 137241, F16K 520
Patent
active
055492754
ABSTRACT:
A valve mechanism for installation in a pipe line for controlling the movement of a flowable material therein which comprises a central body section with end sections connected thereto and forming therewith a valve stopper chamber, the end sections each having an associated annular projection extending into the valve stopper chamber with fluid-flow passages extending outwardly therefrom; a valve stopper in the chamber having a flow passage extending therethrough and sealing surfaces bounding the flow passage; a structure for moving the stopper to a valve open position substantially aligning the stopper flow passage with the end section flow passages, and to a valve closed position blocking the end section flow passages; and a gasket encircling each end section projection and thrust structure operable to press the gaskets against the stopper sealing surfaces when the stopper is in valve open and valve closed positions.
REFERENCES:
patent: 2863629 (1958-12-01), Knox
patent: 3064938 (1962-11-01), Knox
Fox John C.
Haefliger William W.
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