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:
Jun. 14, 2005
Filed:
Dec. 19, 2000
Applicant:
Kazuya Ono, San Carlos, CA (US);
Inventor:
Kazuya Ono, San Carlos, CA (US);
Assignee:
Nikon Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B027/42 ;
U.S. Cl.
CPC ...
Abstract
An actuator has a pair of electromagnets and a curved magnetic member that is magnetically coupled to the electromagnets. The magnetic force acting on the curved magnetic member has less of a tendency to induce torque to the table than a straight magnetic member, because the geometry of the magnetic force between the curved magnetic member and electromagnets remain relatively unchanged over the permitted range of movement of the magnetic member.