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. 06, 2011
Filed:
Mar. 25, 2008
Kesatoshi Takeuchi, Shioziri, JP;
Mamoru Sugimoto, Chino, JP;
Isamu Sejimo, Matsumoto, JP;
Kazuyoshi Nakamura, Azumino, JP;
Kesatoshi Takeuchi, Shioziri, JP;
Mamoru Sugimoto, Chino, JP;
Isamu Sejimo, Matsumoto, JP;
Kazuyoshi Nakamura, Azumino, JP;
Seiko Epson Corporation, , JP;
Abstract
The brushless motor has a first and second drive member. The first drive member is equipped with M phase coil groups each having N electromagnetic coils where M is an integer of 1 or greater and N is an integer of 1 or greater. The second drive member has a plurality of permanent magnets, and is able to move relative to the first drive member. The first drive member has 2 (M×N) magnetic body cores. Each phase electromagnetic coil is coiled on a periodically selected magnetic body core at a ratio of 1 to 2M from among the arrangement of 2 (M×N) magnetic body cores.