Electromagnetic solenoid valve with variable force motor

Details Electromagnetic solenoid valve with variable force motor Electromagnetic solenoid valve with variable force motor

1990-11-01

1991-12-24

Rosenthal, Arnold

Electrical generator or motor structure

Dynamoelectric

Linear

310 17, 310 30, 25112908, 13762565, 335280, F16K 3106, H02K 3302

Patent

active

050755846

ABSTRACT:
A solenoid valve which includes a valve body having a central bore from which fluid passages radially extend. A valve spool is axially slidably captured within the valve body bore to control passage of fluid among the valve body passages. An electromagnetic variable force motor is mounted on the valve body and includes a housing of ferromagnetic construction with a pole piece of ferromagnetic construction coaxial with the valve spool and surrounded by an electrical coil. An armature comprising a ball of ferromagnetic construction is positioned coaxially with the pole piece in abutting engagement with the valve spool. A coil spring is positioned to engage the ball-armature and to urge the same axially away from the pole piece. The characteristic of magnetic attraction between the ball-armature and the opposing face of the pole piece as a function of separation therebetween is substantially identical with spring rate, both preferably being a linear function of ball-armature displacement.

REFERENCES:
patent: 4595035 (1986-06-01), Warrick

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