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:
Dec. 28, 2010
Filed:
Nov. 06, 2008
Manabu Ochi, Hitachinaka, JP;
Katsuhiko Kimura, Kasumigaura, JP;
Souichirou Yamada, Yokohama, JP;
Tetsuo Itou, Yokohama, JP;
Manabu Ochi, Hitachinaka, JP;
Katsuhiko Kimura, Kasumigaura, JP;
Souichirou Yamada, Yokohama, JP;
Tetsuo Itou, Yokohama, JP;
Hitachi Media Electronics Co., Ltd., Iwate, JP;
Abstract
An objective lens actuator which drives an objective lens in a focusing direction and a tracking direction, so as to focus lights on a recording surface of an optical disc, as a recording medium of information. The objective lens actuator includes a magnet, a lens holder which is configured to hold the objective lens thereon, and four pieces of tracking coils which are disposed in a line on a side surface of the lens holder for holding the objective lens thereon, facing to the magnet.