The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 20, 2004
Filed:
May. 24, 2001
Rudolf Schneider, Meckenbeuren, DE;
Stefan Unseld, Weissensberg, DE;
ZF Friedrichshafen AG, Friedrichshafen, DE;
Abstract
The invention is based on an electromagnetic hysteresis unit ( ) with magnetic north pole ( ) which are arranged to alternate with magnetic south pole ( ) on a magnet body ( ) in a peripheral direction ( ) about an axis of rotation ( ) at a distance from the magnetic south poles ( ). The magnet body ( ) comprises a magnet coil ( ). A hysteresis ring ( ) connected with a rotor ( ) can be moved with a slight play in relation to the poles ( ). It is proposed that the peripheral surfaces of the north pole ( ) and south pole ( ) lie on the same circle and opposite the same peripheral surface of the hysteresis ring ( ). Thereby is created a radial construction space for embedding the hysteresis ring ( ) in the rotor ( ) which consists of material of good heat conductivity and optionally for providing cooling ribs.