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:
Oct. 26, 2010
Filed:
May. 16, 2005
Fuminori Satoji, Kuwana, JP;
Ryouichi Nakajima, Kuwana, JP;
Isao Komori, Kuwana, JP;
Kazuo Okamura, Kuwana, JP;
Masafumi Okuma, Tokyo, JP;
Kenichi Mitani, Tokyo, JP;
Fuminori Satoji, Kuwana, JP;
Ryouichi Nakajima, Kuwana, JP;
Isao Komori, Kuwana, JP;
Kazuo Okamura, Kuwana, JP;
Masafumi Okuma, Tokyo, JP;
Kenichi Mitani, Tokyo, JP;
NTN Corporation, Osaka-Fu, JP;
Abstract
Assembly precision in a motor is improved and greater cost reduction is achieved. A fluid dynamic bearing apparatus includes a housing and bearing sleeve as fixed-side members, a shaft member as a rotational-side member having a portion for mounting a rotor magnet, and a disk hub. The shaft member is supported by the bearing sleeve in the radial direction in a non-contact manner by the hydrodynamic effect of a lubricating oil produced in a radial bearing gap between the inner circumferential surface of the bearing sleeve and the outer circumferential surfaceof the shaft member while the shaft member is in rotation. The apparatus includes a disk hub which is fixed on the shaft member and has a portion for mounting the rotor magnet, and the disk hub is a molded resin article formed by insert-molding using the shaft member as an insert piece.