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:
Feb. 01, 2011
Filed:
Oct. 23, 2007
Applicants:
Rikuhiro Hanai, Tokyo, JP;
Takashi Mochida, Chiba, JP;
Yuji Shishido, Kanagawa, JP;
Inventors:
Assignee:
Sony Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 19/20 (2006.01);
U.S. Cl.
CPC ...
Abstract
An automatic balancing apparatus is disclosed. The automatic balancing apparatus includes a housing, magnetic fluid, and a plurality of balancers. The housing is rotatable. The magnetic fluid is contained in the housing. Each of the plurality of balancers is movable in the housing and has a magnet and a yoke which is mounted thereto and which has a raised portion or a depressed portion formed on an inner circumferential side of a rotation of the housing.