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:
Mar. 09, 2010
Filed:
Mar. 19, 2007
Takafumi Asada, Osaka, JP;
Hiroaki Saito, Ehime, JP;
Daisuke Itou, Osaka, JP;
Hiroyuki Kiriyama, Ehime, JP;
Tomoharu Takeda, Ehime, JP;
Takafumi Asada, Osaka, JP;
Hiroaki Saito, Ehime, JP;
Daisuke Itou, Osaka, JP;
Hiroyuki Kiriyama, Ehime, JP;
Tomoharu Takeda, Ehime, JP;
Panasonic Corporation, Osaka, JP;
Abstract
An object of the present invention is to provide a hydrodynamic bearing type rotary device which can improve rotation performance, suppress a friction torque, and reduce power consumption of motor, and a recording and reproducing apparatus including the same. A shaft having a flange on one end and a hub on the other end is provided with a bearing of a sleeve so as to be rotatable. The sleeve includes a communication hole. A third gap between the hub and the sleeve end surface is a flow path, and is connected to the communication hole. Provided that a first gap between a thrust plateand the flangeis S, a second gap between the flangeand a lower end surface of the sleeveis S, and a third gap between the upper end surface of the sleeveand the hubis S, widths of the gaps satisfy the relational expression, S(S+S).