Fluid handling – Line condition change responsive valves – With separate connected fluid reactor surface
Patent
1991-06-05
1992-03-24
Nilson, Robert G.
Fluid handling
Line condition change responsive valves
With separate connected fluid reactor surface
G05D 701
Patent
active
050978632
ABSTRACT:
A flow control valve for maintaining a selected and constant flow rate over a range of liquid delivery pressures is disclosed which includes a housing, a cavity defined within the housing, an input channel in fluid communication with the cavity, the input channel adapted to transport liquid into the cavity, an output channel in fluid communication with the cavity, the output channel adapted to transport liquid from the cavity, an adjustment member receivable into the housing, a spring operative with the adjustment member, a sleeve, the sleeve having a plurality of apertures defined therein, the sleeve disposed within the cavity, a piston sized to fit within the sleeve, the piston adapted for reciprocal movement in the sleeve, the piston operative to vary the operational size of the apertures in the sleeve, the spring adapted to impart a force upon the piston to move the piston in a direction away from the sleeve, a membrane positioned between the sleeve and the piston, the membrane attached at one end to the piston, and at the other end to the sleeve, whereby introduction of liquid under pressure through the input channel into the cavity will occasion movement of the piston against the force of the spring, thus affecting the operational size of the apertures in the sleeve, for maintaining the selected liquid flow rate.
REFERENCES:
patent: 2917075 (1959-12-01), Terry
patent: 2984261 (1961-05-01), Kates
patent: 3277924 (1966-10-01), Nezworski
patent: 3902521 (1975-09-01), Keller
patent: 4210309 (1980-07-01), Grenier
patent: 4513777 (1985-04-01), Wright
McCann Gerald P.
Verley Donald
McCann's Engineering and Manufacturing Co.
Nilson Robert G.
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