Patent ID: 8844900
Filing Date: 2014-09-30
Classification: F16K,H01F,Y10T

Abstract:
1. An activation element of an electromagnetic actuating unit of a hydraulic valve, comprising: an essentially cylindrical armature, which has a lateral surface and a base surface, slidably arranged in the actuating unit, the armature being formed by an extrusion process with the lateral surface and the base surface of the armature being formed without material-removing post-processing steps, the lateral surface of the armature having a groove extending radially into the essentially cylindrical armature arranged so that two spaces, which are separated from the armature in an axial direction, communicate with one another, the armature, the groove has a profile with an axial component and a component in a circumferential direction of the armature wherein the armature has a covering surface and a magnet cone constructed on the covering surface so as to form an outer lateral surface and define a cylindrical cavity in the armature, with the outer lateral surface of the magnet cone being formed by the extrusion process without material-removing post-processing steps.