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:
Jul. 19, 2011
Filed:
Mar. 25, 2009
Hideo Tanaka, Utsunomiya, JP;
Hideo Tanaka, Utsunomiya, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A planar pulse motor includes a movable element and a stator, wherein the movable element contains a magnetic material, and has a plurality of convex portions on a surface thereof facing the stator. The stator includes a plurality of magnetic field generators to drive the movable element, and each magnetic field generator includes a yoke having a plurality of teeth and a coil which excites the yoke. The planar pulse motor includes a controller which controls rotation of the movable element by energizing magnetic field generators selected from magnetic field generators, whose regions do not include a center line of the movable element along a driving direction of the movable element and do not include portions outside a region facing the movable element, of the plurality of magnetic field generators.