Valves and valve actuation – Pivoted valves
Patent
1993-05-17
1994-04-26
Fox, John C.
Valves and valve actuation
Pivoted valves
251 86, F16K 1500
Patent
active
053059875
ABSTRACT:
An improved eccentric, rotary plug valve able to control fluid flow in a conduit having a plug assembly including a plug, having a spherical seating surface adjustably fastened to a hub element by a stud, a seat ring retained within a valve housing, a valve shaft engaging said hub element within the valve housing and further engaging suitable actuating means fastened to the exterior of said valve housing and having reciprocating stem motion, an elastically, deformable crank capable of locking on to said shaft and able to convert said reciprocating actuator motion into rotary shaft motion; said stud being threadingly engaged within said hub element and capable of permitting alteration of the geometric location of the center of the spherical seating surface of the plug to match it exactly with that of the seat ring in order to affect tight shut-off regardless of machining tolerances within the housing, hub, or plug, and where the geometry between plug or hub element and the housing interior is very streamlined.
REFERENCES:
patent: 2998957 (1961-09-01), Vulliez
patent: 3963211 (1976-06-01), Myers
patent: 4074889 (1978-02-01), Engel
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