Flow modulating control valve assembly

Details Flow modulating control valve assembly Flow modulating control valve assembly

1991-10-15

1994-04-05

Michalsky, Gerald A.

Valves and valve actuation

Fluid actuated or retarded

Pilot or servo type motor

251 38, 251 45, F16K 31385

Patent

active

052997758

ABSTRACT:
A flow modulating fluid control valve assembly utilizing a spring biased armature to directly operate a pilot passage in a main flow control valve. An electromagnetic coil assembly opens the valve by shifting the armature and its seal away from the pilot passage allowing the control valve to open and follow the armature until its seal again restricts the pilot passage and achieves a new force balance position for the control valve. Precise modulation is achieved by shaping the force vs. displacement curves for the electromagnetic assembly opening force acting on the armature and the same curve for the spring and other forces acting in a closing direction on the armature so they have substantially different slopes and intersect at a locus of points in the operating range of movement of the armature.

REFERENCES:
patent: 4429708 (1984-02-01), Strueh
patent: 4623118 (1986-11-01), Kumar
patent: 4699351 (1987-10-01), Wells
patent: 4793589 (1988-12-01), Eldredge et al.
patent: 4863098 (1989-09-01), Kolze et al.
patent: 4995586 (1991-02-01), Gensberger et al.
patent: 5048790 (1991-09-01), Wells

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