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:
Apr. 02, 2019
Filed:
Feb. 17, 2017
Applicant:
Ricoh Imaging Company, Ltd., Tokyo, JP;
Inventor:
Eiichi Ito, Chiba, JP;
Assignee:
RICOH IMAGING COMPANY, LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 27/64 (2006.01); H02K 41/02 (2006.01);
U.S. Cl.
CPC ...
G02B 27/646 (2013.01); H02K 41/02 (2013.01); H02K 2201/18 (2013.01);
Abstract
A stage apparatus includes a movable member configured to move in a direction parallel to a predetermined plane, a base member configured to support the movable member to move relative to the base member, and a thrust generator including: a magnet provided on one of the movable member and the base member, and a coil provided on the other of the movable member and the base member. The magnet and the coil generating a thrust to move the movable member in a direction parallel to the predetermined plane. A magnetic flux density of the magnet toward the coil changes along the thrust direction.