Solenoid valve apparatus

Details Solenoid valve apparatus Solenoid valve apparatus

1997-05-23

1999-04-27

Lee, Kevin

Valves and valve actuation

Permanent or constantly energized magnet actuator

25112915, F16K 3106

Patent

active

058970967

ABSTRACT:
A solenoid valve has a biasing member for generating biasing force and a permanent magnet for generating magnetic force. When both the biasing force and the magnetic force act on a movable member, the direction of the biasing force opposes the direction of the magnetic force. Therefore, the position of the movable member is determined based on the balance between the biasing force and the magnetic force. As a result, even when the solenoid coil is not excited, a valve member moving together with the movable member stays apart from the valve seat by a predetermined distance to maintain an open fluid channel.

REFERENCES:
patent: 4251052 (1981-02-01), Hertfelder et al.
patent: 4426988 (1984-01-01), Ito et al.
patent: 4512546 (1985-04-01), Inada et al.
patent: 5029807 (1991-07-01), Fuchs
patent: 5094218 (1992-03-01), Everingham et al.
patent: 5113896 (1992-05-01), Tortellier
patent: 5217200 (1993-06-01), Hutchings et al.
patent: 5259416 (1993-11-01), Kunz et al.
patent: 5277399 (1994-01-01), McCabe
patent: 5787915 (1998-08-01), Byers et al.

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