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:
Aug. 09, 2011
Filed:
Apr. 23, 2008
Kaoru Uenosono, Ehime, JP;
Akira Ninomiya, Ehime, JP;
Takahiro Kishi, Ehime, JP;
Panasonic Corporation, Osaka, JP;
Abstract
According to the present invention, when processing shafts in a centerless grinding machine, engagement between the shafts is prevented without rearranging the shafts, and thus outer circumferential faces of the shafts can be precisely processed. A shaftis used in a hydrodynamic bearing device, and includes a cylindrical column formed with an outer circumferential faceforms a hydrodynamic radial bearing portion, a tapped holethat is formed at a first end of the cylindrical column, and a first projecting portionformed at a second end of the cylindrical column. When the first end and the second end of the shaftsare arranged side by side in an axis direction, the first projecting portionof the shaftcan not interfere with the tapped holeof the other shaft