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:
Apr. 29, 2014
Filed:
Sep. 13, 2012
Shuji Iwasaki, Kyoto, JP;
Yoichi Sekii, Kyoto, JP;
Takehito Tamaoka, Kyoto, JP;
Hideki Nishimura, Kyoto, JP;
Kazuto Miyajima, Kyoto, JP;
Takuro Iguchi, Kyoto, JP;
Kazuhiro Sato, Kyoto, JP;
Takeyuki Shuto, Kyoto, JP;
Shuji Iwasaki, Kyoto, JP;
Yoichi Sekii, Kyoto, JP;
Takehito Tamaoka, Kyoto, JP;
Hideki Nishimura, Kyoto, JP;
Kazuto Miyajima, Kyoto, JP;
Takuro Iguchi, Kyoto, JP;
Kazuhiro Sato, Kyoto, JP;
Takeyuki Shuto, Kyoto, JP;
Nidec Corporation, Kyoto, JP;
Abstract
A motor includes a shaft component including an inner shaft portion and an outer shaft portion. A radial gap is defined between a sleeve portion and the outer shaft portion. A radial dynamic pressure generating groove array is arranged on at least one surface of an inner circumferential surface of the sleeve portion and an outer circumferential surface of the outer shaft portion, which define the radial gap. The radial dynamic pressure generating groove array includes an upper and lower radial dynamic pressure generating groove array. The inner shaft portion is fixed to the outer shaft portion in an interference fit. An axial range of a fixing region of the inner shaft portion and the outer shaft portion which is in the interference fit is included in a range between the upper and lower radial dynamic pressure generating groove array.