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. 22, 2002
Filed:
Jun. 09, 2000
Herbert Schiller, Buehlertal, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
In an electric motor, in particular a commutator motor, with a magnet body ( ) disposed on a rotor shaft ( ) in manner fixed against relative rotation for scanning the revolution and/or rpm, which magnet body has a carrier ring ( ), seated with a press fit on the rotor shaft ( ), and a multi-pole ring magnet ( ) received by the carrier ring, in order to produce the carrier ring of metal for the sake of greater axial force transmission to the rotor shaft ( ), the carrier ring ( ) is embodied with a first annular portion for the press fit and with a second annular portion ( ), adjacent to it in the axial direction, that has an inside diameter for receiving the ring magnet ( ) that is greater than the outside diameter of the rotor shaft ( ). As a result, the stresses caused by the press fit are not transmitted to the ring magnet ( ), which is fragile (FIG. ).