Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Yuji Kobayashi0
Kiyoshi Akiyama0
Masaaki Yamakata0
Date of Patent
March 16, 2010
0Patent Application Number
105756810
Date Filed
July 8, 2004
0Patent Primary Examiner
Patent abstract
A case (100), a rotor (200) that is freely rotatably supported in the case (100), and stators (110) for rotating the rotor by magnetic force are provided. The stator (110) contains a core (111) mounted at the outside of the case (100), and a magnetic coil (112) wound around the core (111). An end face of the core (111) constituting a magnetic pole is formed of at least non-laminate ferromagnetic substance, and exposed to the inner surface of the case (100) so as to form a part of the inner wall of the case (100).
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