Fluid handling – Line condition change responsive valves – With separate connected fluid reactor surface
Patent
1985-06-10
1986-12-23
Schwadron, Martin P.
Fluid handling
Line condition change responsive valves
With separate connected fluid reactor surface
F16K 31363
Patent
active
046306404
ABSTRACT:
A flow regulator valve has a first fluid opening at one end and a second fluid opening at the side of the valve body. A sleeve bore extends from the first opening and contains a stem which is co-axial with the sleeve bore, but spaced from it. A compensating spool is slideably mounted between the sleeve bore and the stem and may move to completely close the second opening or to provide partial opening. A control spring biases the spool to the open position, but a fluid passage through the stem wall permits the pressure of the fluid at the first opening to be applied to bias the spool to the closed position. A valve element containing an orifice establishes the nominal flow rate desired, while the pressure drop across the spool causes it to assume a position to maintain the desired flow rate. A valve element control spring may be used to maintain the valve element in the "off" position until the pressure rises to a desired threshold. Venting of the cavity in which the valve element is located is provided.
REFERENCES:
patent: 3402735 (1968-09-01), Kates
patent: 3643685 (1972-02-01), Hays
patent: 3825032 (1974-07-01), Peruglia
patent: 4074693 (1978-02-01), Kates
patent: 4237922 (1980-12-01), Maier
patent: 4250915 (1981-02-01), Rikuta
patent: 4495794 (1985-01-01), Takada et al.
Hepperle Stephen M.
Prescott Charles J.
Quist Raymond H.
Schwadron Martin P.
Sun Hydraulics Corp.
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