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:
Mar. 16, 2010
Filed:
Jul. 08, 2004
Applicants:
Masaaki Yamakata, Tokyo, JP;
Yuji Kobayashi, Tokyo, JP;
Kiyoshi Akiyama, Tokyo, JP;
Inventors:
Assignee:
Rigaku Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02K 7/09 (2006.01);
U.S. Cl.
CPC ...
Abstract
A case (), a rotor () that is freely rotatably supported in the case (), and stators () for rotating the rotor by magnetic force are provided. The stator () contains a core () mounted at the outside of the case (), and a magnetic coil () wound around the core (). An end face of the core () constituting a magnetic pole is formed of at least non-laminate ferromagnetic substance, and exposed to the inner surface of the case () so as to form a part of the inner wall of the case ().