Proportional electromagnetic flow valve

Details Proportional electromagnetic flow valve Proportional electromagnetic flow valve

1989-02-15

1991-06-04

Rivell, John

Valves and valve actuation

Fluid actuated or retarded

Pilot or servo type motor

251 44, 25112907, F16K 3140

Patent

active

050207725

ABSTRACT:
A remotely controllable proportional pilot flow valve includes a common steel armature with a concave attracted end which is magnetically semi-saturated in the design range of energization, providing a flat force response curve. The armature has a recessed midsection to improve tolerance to particulate contamination in the working fluid and two opposed flats for improved venting.

REFERENCES:
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patent: 4553732 (1985-06-01), Brundage et al.
patent: 4750704 (1988-06-01), Brundage
patent: 4766921 (1988-08-01), Williams
Rotors, H. C. Electromagnetic Devices, John Wiley & Sons, NYC Jun. 1941.
Lee & Blackburn, "Steady State Axial Forces on Control Valve Pistons", ASME Paper No. 51-A52, Aug. 7, 1951.
Inoue, R. "Contaminant Effects on Electrohydraulic Control Valves", SAE Technical Paper 820649 (May 1982).
Hydraulics & Pneumatics, vol. 40, No. 5, May 1987, Zin, Z. L. "Basics of Breakdown Forces in Spool Valves".

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