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:
Nov. 15, 2005
Filed:
Mar. 26, 2002
Shigeo Obata, Hyogo, JP;
Kaoru Matsuoka, Osaka, JP;
Koichi Shinohara, Ibaragi, JP;
Yoshihiro Ueno, Osaka, JP;
Tatsuhiko Inagaki, Osaka, JP;
Hideki Kuwajima, Kyoto, JP;
Hiromi Kita, Nara, JP;
Shigeo Obata, Hyogo, JP;
Kaoru Matsuoka, Osaka, JP;
Koichi Shinohara, Ibaragi, JP;
Yoshihiro Ueno, Osaka, JP;
Tatsuhiko Inagaki, Osaka, JP;
Hideki Kuwajima, Kyoto, JP;
Hiromi Kita, Nara, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
An information-recording/-reproducing device comprises a rotor assembly formed of a disc portion having information recording layer provided on the main surface and an axle portion, the disc portion being connected at the center of a surface opposite to the main surface with the rotating axle so that the rotating axis crosses at right angle with the main surface of disc portion at the center of rotation, a bearing for supporting the axle of disc portion freely rotatable, a rotating magnet fixed to a rotor yoke, a stator disposed opposing to the rotating magnet, and a motor for rotating the disc portion with the rotating axis of the axle as the center of rotation. Preferably, the disc portion with the rotating axle portion having a round column shape or a cylindrical shape, further may have a shallow hollow in the central part of the main surface which being a surface opposite to the surface having the rotating axle.