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. 23, 2012
Filed:
Apr. 22, 2011
Applicants:
Takuya Yamane, Kyoto, JP;
Haruhiko Ito, Kyoto, JP;
Hisakazu Motomochi, Kyoko, JP;
Shigeo Hayashi, Kyoto, JP;
Inventors:
Takuya Yamane, Kyoto, JP;
Haruhiko Ito, Kyoto, JP;
Hisakazu Motomochi, Kyoko, JP;
Shigeo Hayashi, Kyoto, JP;
Assignee:
Nidec Corporation, Kyoto, JP;
Primary Examiner:
Int. Cl.
CPC ...
G11B 17/028 (2006.01);
U.S. Cl.
CPC ...
Abstract
In a chucking device, a rolling guide portion is arranged below an upper cover portion of a rotor holder and radially inwards of a cylinder portion of the rotor holder. This helps restrain the noises generated by the rolling movement of balls from propagating to the outside. Moreover, the turntable and the rolling guide portion are formed of a single resin member extending continuously through a through-hole defined in the rotor holder.