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. 27, 2007
Filed:
Dec. 20, 2002
Kazuhito Kurita, Kanagawa, JP;
Norimasa Matsuo, Kanagawa, JP;
Kazuhito Kurita, Kanagawa, JP;
Norimasa Matsuo, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
The present invention is directed to a drive device comprising an electromechanical transducer () attached to one end of a drive shaft () and adapted to be expanded and contracted in the axial direction of the drive shaft () in accordance with drive voltage to thereby allow the drive shaft () to undergo displacement in the axial direction thereof, and an optical pick-up () movably supported in the axial direction of the drive shaft () and moved along the drive shaft () as the result of the fact that the drive shaft () is caused to undergo displacement by the electromechanical transducer () to apply a drive voltage higher than that at the time of steady transfer to the electromechanical transducer () at the time of starting.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile