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. 28, 2014
Filed:
Jul. 28, 2014
Nidec Corporation, 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 rotating portion including a sleeve portion and a stationary portion. The stationary portion includes a shaft component which includes an inner shaft portion and an outer shaft portion. A radial dynamic pressure generating groove array is provided 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 radial dynamic pressure generating groove array and a lower radial dynamic pressure generating groove array. A range of a fixing region in an axial direction between the inner shaft portion and the outer shaft portion in an interference fit state is included in a range between the upper radial dynamic pressure generating groove array and the lower radial dynamic pressure generating groove array.