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US 5,627,504 AGranted
Electromagnetic actuating device, in particular for a valve
AssigneeAVL Medical Instruments AG
InventorErich Kleinhappl
Life of this patent
Estimating the term…
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.
Claims7
Electromagnetic actuating device, comprising:
- a plunger which is axially movable between a first and a second extreme position, said plunger defining a first diameter,
- an electromagnetic coil surrounding said plunger for actuation of said plunger,
- a permanent magnet configured as a non-perforated flat disk and located outside said electromagnetic coil for holding said plunger in said first extreme position, said non-perforated flat disk defining a second diameter which is greater than said first diameter, and
- a non-perforated first pole plate located between said plunger and said permanent magnet, said first pole plate being dimensioned to completely cover said permanent magnet on a side thereof facing said plunger.
1 more element
Dependencies are inferred from the claim text.