Fluid handling – Systems – Flow path with serial valves and/or closures
Patent
1991-01-29
1992-08-25
Chambers, A. Michael
Fluid handling
Systems
Flow path with serial valves and/or closures
251122, 2513353, F16K 104
Patent
active
051410273
ABSTRACT:
A dual control stem valve, to be universally installed for the staged control of a flow of matter facilitating; a valve body having a readily couplable inlet port and outlet port, the valve body having a primary bore connecting a primary valve seat arrangement, the primary bore receiving a rotatably positionable primary valve stem comprising an impassable valve end optionally communicatable to the primary valve seat arrangement, whereupon, when communication of the valve end of the primary valve stem to the primary valve seat arrangement is made the flow of matter is positively terminated from continuing further enabling absolute initial control of the continuance of flow, the primary valve stem having within a secondary stem bore connecting a secondary valve seat arrangement, the secondary stem bore receiving an independent secondary valve stem comprising a valve end rotatably positionably communicatable to the secondary valve seat arrangement enabling the rate of flow to be separately variably controlled, and accordingly, be immediately continually reinstated at a similar flow rate.
REFERENCES:
patent: 779357 (1905-01-01), Gardner
patent: 865318 (1907-09-01), Roberts
patent: 1478584 (1923-12-01), Schweinert
patent: 3870080 (1975-03-01), Landwehr
patent: 4064908 (1977-12-01), Loe
patent: 4175726 (1979-11-01), Richards
patent: 4311170 (1982-01-01), Dolan
patent: 4313466 (1982-02-01), Adams
patent: 4414999 (1983-11-01), Basta
patent: 4687180 (1987-08-01), Simonelli
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