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:
Mar. 05, 2002
Filed:
Oct. 21, 1999
Nobuyuki Okunaga, Odawara, JP;
Toshihisa Okazaki, Odawara, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
In a magnetic disk drive having a magnetic circuit which provides a driving force to a carriage holding a magnetic head so as to position the magnetic head, the magnetic circuit includes a driving coil attached fixedly to the carriage and a magnet-yoke assembly . The magnet-yoke assembly is supported in a housing at one point thereof so as to be able to rotate in the direction parallel to the surface of the magnetic disk. The assembly is rotatably supported by means of a bearing and the bearing is provided with an initial displacement so as to increase the axial bearing rigidity thereof. A base is provided with a slip guide which allows the magnet-yoke assembly to rotate with low friction and serves to provide the initial displacement to the bearing. A visco-elastic member is provided for restricting the rotation of the assembly.