Flow limiting valve

Details Flow limiting valve Flow limiting valve

1982-07-01

1983-12-27

Weakley, Harold W.

Fluid handling

Line condition change responsive valves

Line flow effect assisted

1374844, 137501, F16K 1734

Patent

active

044224702

ABSTRACT:
The invention is an improved pressure compensating flow limiting valve which maintains an optimum performance curve at differing flow rates. The invention is the specific placing of a vent passage in the valve spool immediately downstream of the fluid jet passing across the spool in a metering mode with the vent passage connected to one of the servo chambers which positions the spool. The effect of the exiting fluid jet draws some fluid from the vent passage thereby dropping the pressure level in that servo chamber sufficiently to offset certain dynamic forces on the spool and balance the spring forces on the spool with these forces regardless of the flow rate through the valve.

REFERENCES:
patent: 1994320 (1935-03-01), McLaughlin
patent: 2646078 (1953-07-01), Adams
patent: 2800141 (1957-07-01), Hedland
patent: 2881793 (1959-04-01), Lee
patent: 3979907 (1976-09-01), Paul

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