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:
Sep. 25, 2012
Filed:
Sep. 30, 2008
Misa Nakayama, Tokyo, JP;
Shinichi Yamaguchi, Tokyo, JP;
Koki Naka, Tokyo, JP;
Kazumasa Ito, Tokyo, JP;
Toshinori Tanaka, Tokyo, JP;
Misa Nakayama, Tokyo, JP;
Shinichi Yamaguchi, Tokyo, JP;
Koki Naka, Tokyo, JP;
Kazumasa Ito, Tokyo, JP;
Toshinori Tanaka, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
A linear motor includes a stator having field poles arranged linearly with opposing polarities arranged in an alternating manner; and a rotor having an armature core with teeth that faces a pole face of the field poles with a gap, and coils wound around the teeth. The stator and the rotor are supported in a slidable manner, a direction perpendicular to a sliding direction of the rotor and in parallel with the pole face is defined as a stacking direction. A head of each of the teeth has an extended portion extended in the sliding direction. At least heads of the teeth arranged at both ends of the armature core along the sliding direction is divided into a plurality of areas along the stacking direction. At least one of extended portions arranged on adjacent areas is extended by a different length along the sliding direction.