Patent ID: 6924965
Filing Date: 2005-08-02
Classification: H01F,H02K

Abstract:
1. An electromagnetically operated device, comprising an electromagnet, said electromagnet including a magnetic guide having a movable armature and at least one air gap, a magnetizing coil provided on said magnetic guide, said magnetic guide having at least a part formed as an insert of a magnetically hard material, said magnetic guide having an immovable part formed as a cylinder, said movable armature being provided with a cover of said cylinder, said magnetizing coil being located inside said cylinder coaxially to the latter, a rod extending along an axis of said cylinder, located in an inner hollow of said cylinder, and having at least a part of composed of a electromagnetically soft material, said armature being formed so as to close said magnetic guide with formation of a three dimensional closed structure including said cylinder, said cover, said rod with a possibility of providing a holding force which is equal to a pulling force formed by a winding of said magnetizing coil during a supply of a short-term current pulse to the winding of said magnetizing coil and demagnetization of a material of said rod.