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. 27, 2005
Filed:
Aug. 22, 2002
Yuji Fujita, Yokohama, JP;
Asao Nakano, Kamakura, JP;
Yasuo Amano, Yokohama, JP;
Nobuyuki Ushifusa, Yokohama, JP;
Kouki Uefune, Odawara, JP;
Takashi Yamaguchi, Tsuchiura, JP;
Toshiyuki Ajima, Hitachi, JP;
Yuji Fujita, Yokohama, JP;
Asao Nakano, Kamakura, JP;
Yasuo Amano, Yokohama, JP;
Nobuyuki Ushifusa, Yokohama, JP;
Kouki Uefune, Odawara, JP;
Takashi Yamaguchi, Tsuchiura, JP;
Toshiyuki Ajima, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A disk drive comprising a rotor, to which a disk and a plurality of magnets are fixed, and an open-slot type integrally molded stator disposed about an outer periphery of the magnets, and wherein the stator comprises coils formed by etching metallic films on teeth. The invention may also be applied to a closed-slot type stator. With either type, it is possible to produce an opening that is equal to or smaller than the thickness of a coil wire and cogging torque is minimized.