Flow control valve

Details Flow control valve Flow control valve

2007-05-22

2007-05-22

Krishnamurthy, Ramesh (Department: 3753)

Fluid handling

Line condition change responsive valves

Direct response valves

C137S512100, C137S515500, C251S118000

Reexamination Certificate

active

10799169

ABSTRACT:
A two-stage fluid pressure control valve has five components. An inlet socket with separate fluid flow orifices sealably engages an outlet socket which also has separate fluid flow orifices. A pressure check piston having a fluid flow orifice along its longitudinal central axis slidably engages the inlet socket and the outlet socket. A spring located along the central axis of the outlet socket biases the pressure check piston in an open position, allowing fluid to flow through all orifices. Fluid flow through the control valve may impact the pressure check piston to overcome the spring force, moving the pressure check piston to a closed position, whereby fluid flows only through the orifice in the pressure check piston.

REFERENCES:
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patent: 5215113 (1993-06-01), Terry
patent: 5473700 (1995-12-01), Fenner, Jr.
patent: 6830064 (2004-12-01), Ji

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