Loading pressure compensation type logic valve

Details Loading pressure compensation type logic valve Loading pressure compensation type logic valve

1991-10-16

1992-12-29

Michalsky, Gerald A.

Fluid handling

Line condition change responsive valves

With separate connected fluid reactor surface

91446, 13761418, 1376253, 251 29, G05D 700, F16K 31383

Patent

active

051743299

ABSTRACT:
A fluid-operated valve includes a control spool, actuated by a source of pilot pressure to control a pilot flow of fluid from a loading pressure inlet port to a drain line. The pilot flow passes a throttle which reduces the fluid pressure acting in one direction, thereby performing stroke compensation of the actuation of a valve poppet. A differential pressure compensation valve is moved to partially block fluid flow to a rate control orifice group in response to a difference in pressure on the two sides of the rate control orifice group to control further the actuation of the valve poppet, whereby differential pressure is compensated.

REFERENCES:
patent: 3596677 (1971-08-01), Clark et al.
patent: 3724494 (1973-04-01), Alber
patent: 4462566 (1984-07-01), French
patent: 4809746 (1989-03-01), Wolfges
patent: 4997159 (1991-03-01), Yoshino et al.
patent: 5000220 (1991-03-01), Eick et al.

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