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. 14, 2008
Filed:
Apr. 18, 2005
Junichi Nakamura, Ozu, JP;
Tomohiro Haga, Ozu, JP;
Junichi Nakamura, Ozu, JP;
Tomohiro Haga, Ozu, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A flange on a shaft of a fluid dynamic bearing unit is to be provided with a hole connecting an outer periphery of the flange and an outer periphery of the shaft. A radial groove is provided on a surface of two flange half pieces, and a vertical groove communicating with the radial groove is provided on an inner circumferential surface of the flange half pieces. Upon combining the two flange half pieces with the grooves facing each other and attaching them to the shaft, a path connecting an outer periphery of the flange and an outer periphery of the shaft is formed. The groove may be formed in a desired cross-sectional shape such as a semicircle, triangle or rectangle. The groove may be formed only on either of the flange half pieces, and the groove can be formed by a simple process such as pressing.