Proportional pressure control solenoid valve

Details Proportional pressure control solenoid valve Proportional pressure control solenoid valve

1997-06-12

1999-04-20

Michalsky, Gerald A.

Fluid handling

Systems

Multi-way valve unit

13759617, 251 50, F15B 13044

Patent

active

058948600

ABSTRACT:
A proportional pressure control solenoid valve includes a valve spool with dual feedback pins slidable relative to the spool within a common bore of the spool as the spool moves. The feedback pins have unequal cross sectional areas defining an operative feedback area and enabling minimization of the valve's size in a cost efficient manner. To control output pressure as a function of control current, an electro-magnetically generated force initiates modulation of the valve with assistance from a hydraulic feedback force and in opposition to the force of modulating spring.

REFERENCES:
patent: 4643225 (1987-02-01), Imhof
patent: 5186093 (1993-02-01), Kervagoret
patent: 5191827 (1993-03-01), Kervagoret
patent: 5234030 (1993-08-01), Kervagoret et al.
patent: 5571248 (1996-11-01), Seetharaman et al.
patent: 5577534 (1996-11-01), Ward
patent: 5592972 (1997-01-01), Niethammer
patent: 5640987 (1997-06-01), Sturman
patent: 5647645 (1997-07-01), Muller et al.

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