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:
Jan. 27, 2004
Filed:
Jan. 31, 2000
Fujitsu Limited, Kawasaki, JP;
Abstract
Provided is a storage apparatus in which the resonant frequency of carriage driving coils is high and precision in positioning a carriage is excellent. The storage apparatus is, for example, an optical disk drive having rails laid parallel to one radius of a disk, and able to read or writing data from or on the disk using a carriage movable along the rails. The carriage is moved using driving coils mounted on the flanks of the carriage and magnetic circuits each composed of a permanent magnet and yokes which are located outside the carriage. The driving coils are each shaped like a parallelepiped whose sides extending in a direction along the flank of the carriage are longer than other sides extending in a direction perpendicular to the flank. The permanent magnet or yokes of each magnetic circuit is opposed to a plane containing the long sides of each of the parallelepiped-shaped driving coils. Consequently, the rigidity of the carriage driving coils has been raised and precision in positioning the carriage has been improved.