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:
Aug. 31, 2010
Filed:
Dec. 17, 2007
Tooru Ooiwa, Toyota, JP;
Tooru Ooiwa, Toyota, JP;
Denso Corporation, Kariya, JP;
Abstract
A magnet covering member made of a soft steel plate covers an outer surface of a magnetized permanent magnet placed in a rotor core of a rotor. The magnet covering member is detached from the permanent magnet when the rotor is incorporated into a stator of an alternator during an alternator assembling process. Because of a soft magnetic characteristic of the magnet covering member, an outer magnetic field generated by the permanent magnet placed between adjacent claw poles of the rotor core makes a magnetic short-circuit, and a magnetic attracting phenomenon caused by such a magnetic field is thereby reduced. The soft magnetic characteristic of the magnet covering member also serves to support the rotor.