Patent ID: 8327853

Claim:
A bistable magnetic holding device, characterised in that it comprises: a nonmagnetic support casing forming a channel with a rectangular cross-section, a magnetic core including a base and three legs arranged perpendicularly to this base, the two outer legs and the base forming a “U”, a permanent magnet in the shape of a bar inserted between the base and the middle leg, a coil surrounding the middle leg, a movable flat magnetic part set above the upper part of the support casing, a magnetic flux, aligned with the direction of motion of this movable magnetic part, being established between the magnetic core and this movable magnetic part, return motion and guidance means built into the inside walls of the support casing so as to allow a return, toward the upper part of the support casing, of the magnetic core to a position where the upper part of the three legs is in contact with the lower surface of the upper part of the support casing, and to allow the guidance in translation of the outside surfaces of the outside legs of the magnetic core within the support casing.