Patent ID: 8203405

Claim:
An electromagnetic actuating apparatus comprising: an elongated actuating element having an engagement area at an end thereof, a stationary coil device for moving the elongated actuating element, the elongated actuating element has permanent magnet means for interacting with a stationary core area, a stationary mounting element, the mounting element is provided with a circumferentially closed annular bead on an end face thereof which faces the permanent magnet means and forms a stop for the permanent magnet means which acts as a yoke, is provided axially opposite the stationary core area for the elongated actuating element, the elongated actuating element is in the form of a piston at least in places, the elongated actuating element has two sections comprising a first section arranged in the area of the permanent magnet means and optimized for magnetic permeability, and a second section arranged in the engagement area and optimized for wear.