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. 03, 2012
Filed:
Aug. 27, 2009
Applicants:
Kesatoshi Takeuchi, Shiojiri, JP;
Kazuyoshi Nakamura, Azumino, JP;
Mamoru Sugimoto, Chino, JP;
Inventors:
Assignee:
Seiko Epson Corporation, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02K 47/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
To provide a technique that improves an efficiency of using a magnetic field in a brushless electric machine. A brushless electric machine includes a first member having N sets (N is an integer of 2 or more) of electromagnetic groups, and a second member that has N+1 sets of magnetic field forming member groups and can move in a predetermined moving direction in relative to the first member. One set of the electromagnetic coil group and one set of the magnetic field forming member group are alternately disposed along a direction perpendicular to the moving direction.