Electro-magnetically operated valve

Details Electro-magnetically operated valve Electro-magnetically operated valve

1997-04-10

1999-11-30

Rivell, John

Valves and valve actuation

Electrically actuated valve

Solenoid having plural coils

335279, F16K 3106, H01F 300

Patent

active

059928212

ABSTRACT:
An electro-magnetically operated valve which has a pole piece, an armature member mounted for movement relative to the pole piece, and an electro-magnetic device associated with the pole piece for effecting movement of the armature member between a first position spaced from the pole piece to a second position where the armature member contacts the pole piece, where at least a portion of the armature member and/or the pole piece has in or on a coating or layer of material having a higher mechanical hardness or a higher magnetic permeability than the material of the armature and/or pole piece.

REFERENCES:
patent: 3573690 (1971-04-01), Jones et al.
patent: 3743898 (1973-07-01), Sturman
patent: 4114648 (1978-09-01), Nakajima et al.
patent: 4168688 (1979-09-01), Bart
patent: 4231525 (1980-11-01), Palma
patent: 5460329 (1995-10-01), Sturman
patent: 5479901 (1996-01-01), Gibson et al.
patent: 5488340 (1996-01-01), Maley

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