Fluid handling – Systems – Flow path with serial valves and/or closures
Patent
1993-03-18
1995-04-25
Schwadron, Martin P.
Fluid handling
Systems
Flow path with serial valves and/or closures
13761403, 251264, F16L 3728
Patent
active
054090393
ABSTRACT:
A service adapter includes a hollow adapter body; a valve seat in the adapter body; a threaded spindle threadedly engaging the adapter body and extending thereinto; a turning knob attached to the spindle, whereby a rotation of the turning knob effects a rotation and a linear displacement of the spindle relative to the adapter body; a valve stem disposed in the adapter body and adjoining the spindle; a valve body attached to the valve stem and cooperating with the valve seat; and a coupling connecting the spindle with the valve stem for transmitting from the spindle to the valve stem forces derived substantially solely from the linear displacement of the spindle. In this manner no appreciable tangential (circumferential) forces are applied to the valve stem to substantially prevent rotation of the valve stem and the valve body.
REFERENCES:
patent: 1484740 (1924-02-01), Rubino
patent: 1906313 (1933-05-01), Clifford
patent: 2892608 (1959-06-01), Collins
patent: 4289414 (1981-09-01), Recker
patent: 5139049 (1992-08-01), Jensen et al.
patent: 5156483 (1992-10-01), Mangas
Lee Kevin L.
Schwadron Martin P.
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