Electromagnetic actuating device, in particular for a valve

Details Electromagnetic actuating device, in particular for a valve Electromagnetic actuating device, in particular for a valve

1995-03-07

1997-05-06

Picard, Leo P.

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

With magneto-mechanical motive device

335251, 25112915, H01F 700, H01F 710, F16K 3102

Patent

active

056275048

ABSTRACT:
Electromagnetic actuating device, in particular for a valve, includes a plunger which is axially movable between two extreme positions, an electromagnetic coil surrounding the plunger actuating it, and a permanent magnet holding the plunger in one of its extreme positions, and at least one pole plate located between plunger and permanent magnet. The holding force of the permanent magnet is considerably increased by providing that the permanent magnet, which is configured as a flat disk, be completely covered by the pole plate on the side facing the plunger.

REFERENCES:
patent: 4056255 (1977-11-01), Lace
patent: 5109171 (1992-04-01), Schmider
patent: 5115664 (1992-05-01), Hegde
patent: 5174025 (1992-12-01), Tasaki
patent: 5268662 (1993-12-01), Uetsuhara

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