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. 31, 2002
Filed:
Jul. 14, 1999
Applicant:
Inventor:
Chin-Sung Liu, Miao-Li, TW;
Assignee:
Acute Applied Technologies, Inc., Chutung, TW;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B 2/116 ;
U.S. Cl.
CPC ...
G11B 2/116 ;
Abstract
A magnetic coil actuator which can provide a higher output but maintains the original volume and the same power consumption is disclosed. The coil actuator uses a movable magnetic coil which is adjusted of its shape to meet the magnetic field of a static magnet. The coil is suitably bent to have its two diametric sections falling into the magnetic lines of the magnet, so as to maximize the usage rate of the coil to the magnetic field. Therefore, the coil actuator provides a higher output applicable to a tracking or focusing device of a pickup head, and meets the requirements of high speed optical recording devices.