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:
May. 19, 2009
Filed:
Jun. 15, 2006
Masanori Murakami, Kanagawa, JP;
Masanori Murakami, Kanagawa, JP;
Fujitsu General Limited, Kanagawa, JP;
Abstract
A rotorhas permanent magnetsdisposed on a surface of a disk-shaped back yokein such a manner that long sides of each permanent magnet extend in a radial direction and that a South pole and a North pole of the permanent magnetare arranged in a circumferential direction. The four permanent magnetsare equally spaced from one another in the circumferential direction, and circumferentially-opposed magnetic poles of any two adjacent permanent magnetsare of the same magnetic polarity. Rotor coresof a generally fan-shape are fixed to the back yoke to generally cover the four permanent magnetsA flux barrierfor reducing the short-cutting of magnetic flux of the permanent magnetis provided between any two adjacent rotor coresand is disposed at a radially-extending central portion of the permanent magnet