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:
Feb. 06, 2007
Filed:
Mar. 26, 2003
Yoshinori Ogawa, Nagano, JP;
Yoshinori Ogawa, Nagano, JP;
Nidec Sankyo Corporation, Nagano, JP;
Abstract
A motor in which drive coils are arranged in an axial direction of a cylindrical rotor magnet of which an outer peripheral surface is magnetized, the drive coils are cylindrical bodies having respectively center holes into which a rotor shaft is to be inserted, curling cases each of which is formed by bending a flat plate made of a magnetic material into a tubular shape, surround the drive coils, respectively, and surround a cylindrical surface of the rotor magnet with a predetermined gap therebetween, and portions of the surfaces of the curling cases, which face the drive coils associated therewith, serve as yoke parts, respectively, while other portions of the curling cases, which face the rotor magnet, are formed to be pole teeth, and also serve as yoke plates.