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. 24, 2004
Filed:
Mar. 23, 2001
Shinji Koganezawa, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A head drive device for positioning a read and/or write head for reading and/or writing information to and from a disk coated with a recording medium, the head drive device including a carriage, a main actuator for moving the carriage, a plurality of heads for reading and/or writing information to and from the disk, and a vibration control portion comprising a plurality of micro-actuators positioned between the carriage and the heads, such that when the main actuator and a first micro-actuator are driven to enable precise positioning of a desired head with respect to a surface of the disk a second micro-actuator is driven so as to offset vibrations generated at the carriage by the operation of the desired micro-actuator.