Pulse-width-modulated solenoid valve

Details Pulse-width-modulated solenoid valve Pulse-width-modulated solenoid valve

1987-09-09

1988-08-23

Rosenthal, Arnold

Valves and valve actuation

Electrically actuated valve

Including solenoid

25112905, 25112914, 251333, F16K 3106

Patent

active

047655879

ABSTRACT:
A pulse-width-modulated solenoid valve has a body provided with an elongated chamber. The body has inlet and outlet openings communicating with the chamber, and has a seat surrounding the inlet opening and arranged to face into the chamber. An armature is mounted in the chamber for movement therealong toward and away from the seat. A coil is mounted on the body, and is adapted to be selectively energized to move the armature in one direction relative to the body. A return spring is arranged to urge the armature to move in the opposite direction relative to the body. The improvement provides a valve element which is mounted for movement with the armature toward and away from the seat, but also mounted for movement relative to the armature when the element engages the seat, such that the mass of the armature will not exert a substantial force against the seat. According to the improvement, the operating life of the valve may be greatly extended.

REFERENCES:
patent: 3737141 (1973-06-01), Zevner
patent: 4027850 (1977-06-01), Allen
patent: 4638837 (1987-01-01), Buike et al.
patent: 4666125 (1987-05-01), Marts et al.

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