Solenoid valve

Details Solenoid valve Solenoid valve

1983-07-14

1986-01-14

Rosenthal, Arnold

Fluid handling

Systems

Multi-way valve unit

251 65, 251356, 25112921, 25112915, F16K 3108, F16K 1104

Patent

active

045640467

ABSTRACT:
A solenoid valve having an exciter coil is formed with a central passage for guiding an armature of a permanently magnetic material which is polarized in the direction of its axial movement. At the other end of the passage there is provided a tubular core of a magnetically soft material which acts as a mechanical limit stop for the armature and is also shaped as a valve seat controlled by the end face of the armature. An outer magnetically conductive member is arranged at the other end of the coil around the armature and is spaced from the latter by an air gap so as to act as a magnetic holding member for the armature when the coil is energized and the armature is displaced to its working position away from the stop member. Thus at least the end of the armature which faces the valve seat is provided with a frustoconical attachment having on its periphery a plurality of guiding fingers. The tip of the attachment controls the valve seat while the fingers permit the flow of a fluid past the armature.

REFERENCES:
patent: 1485508 (1924-03-01), Kiley
patent: 3368788 (1968-02-01), Padula
patent: 3379214 (1968-04-01), Weinberg
patent: 3529806 (1970-09-01), Kozel
patent: 4005733 (1977-02-01), Riddel
patent: 4102526 (1978-07-01), Hargraves
patent: 4159026 (1979-06-01), Williamson
patent: 4211257 (1980-07-01), Sakakibara et al.
patent: 4322057 (1982-03-01), Yamanaka et al.
patent: 4326696 (1982-04-01), Ishikawa et al.

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