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. 04, 2012
Filed:
Apr. 17, 2006
Kenji Ito, Kuwana, JP;
Isao Komori, Kuwana, JP;
Fuminori Satoji, Kuwana, JP;
Fuyuki Ito, Kuwana, JP;
Yoshiharu Inazuka, Kuwana, JP;
Kenji Ito, Kuwana, JP;
Isao Komori, Kuwana, JP;
Fuminori Satoji, Kuwana, JP;
Fuyuki Ito, Kuwana, JP;
Yoshiharu Inazuka, Kuwana, JP;
NTN Corporation, Osaka-shi, JP;
Abstract
The present invention aims to achieve a reduction in cost for a fluid dynamic bearing device. The fluid dynamic bearing device supports a shaft member () radially in a non-contact fashion by a dynamic pressure action generated in a radial bearing gap between an outer peripheral surface of the shaft member () and an inner peripheral surface () of a bearing member (), and is composed of the shaft member (), the bearing member (), a cover member (), and a seal member (). The shaft member () is inserted into an inner periphery of the bearing member (), and an opening at a lower end thereof is sealed by the cover member (). The seal member () is attached to an opening at an upper end of the bearing member (), forming a seal space (S) between itself and the outer peripheral surface of the shaft member (). Dynamic pressure grooves (G) of radial bearing portions (Rand R) are formed in an inner peripheral surface () of the bearing member () by molding.