Patent ID: 9369031
Filing Date: 2016-06-14
CPC Classification: H01F,H02K

Claim Text:
1. An electromagnetic actuator, comprising: (a) a magnetically soft housing having at least two field coils which are distanced from each other axially, (b) an armature which is mounted in the housing concentrically to the field coils, wherein at least one permanent magnet ring encloses the armature radially, wherein the armature is mounted in the housing in a manner allowing sliding by means of an axle in a first end-face bearing of the housing, and by means of a bearing tube as the second bearing, and (c) a non-magnetic sleeve, radially surrounding the at least one permanent magnet ring and the armature, holding the at least one permanent magnet ring in contact with the armature, and connected via the end face thereof to each of the end faces of the armature by means of press fitting, swaging or crimping, allowing the armature and the at least one permanent magnet ring to slide axially together.