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:
Sep. 12, 2006
Filed:
Oct. 07, 2004
Applicants:
Jiro Asai, Okazaki, JP;
Shinichi Ogawa, Oobu, JP;
Inventors:
Jiro Asai, Okazaki, JP;
Shinichi Ogawa, Oobu, JP;
Assignee:
Denso Corporation, Kariya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02K 21/12 (2006.01); H02K 1/22 (2006.01);
U.S. Cl.
CPC ...
Abstract
A total of three permanent magnets, installed in a rotor core closely to an outer cylindrical surface of the rotor core, are disposed at predetermined angular pitches in the circumferential direction of the rotor core. All of the permanent magnets are magnetized in such a manner that the direction of magnetization is the same when seen in the radial direction. A plurality of magnet-less holes, extending in the axial direction in the vicinity of the outer cylindrical surface of the rotor core, are provided between two adjacent permanent magnets.