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. 10, 2006
Filed:
Dec. 11, 2001
Tsuyoshi Kakuta, Kurume, JP;
Hirohiko Oowaki, Fukuoka, JP;
Kensei Fukuda, Miyaki-gun, JP;
Fuminobu Furukawa, Onojo, JP;
Tsuyoshi Kakuta, Kurume, JP;
Hirohiko Oowaki, Fukuoka, JP;
Kensei Fukuda, Miyaki-gun, JP;
Fuminobu Furukawa, Onojo, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
The invention provides a motor which can reduce a generation of a cogging, has a thin size, and can generate a strong torque. In a motor having an armature including a back yoke formed in a cylindrical shape and a wound coil and a magnet formed in a cylindrical shape and magnetized by a plurality of magnetic poles on a cylindrical circumferential surface, the back yoke forms a convex portion protruding from the back yoke toward the magnet in a current switching portion of the coil. The invention further provided a disc apparatus using the motor mentioned above.