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:
Jun. 23, 2009
Filed:
Oct. 20, 2005
Applicants:
Takehito Tamaoka, Kyoto, JP;
Kazushi Miura, Kyoto, JP;
Inventors:
Takehito Tamaoka, Kyoto, JP;
Kazushi Miura, Kyoto, JP;
Assignee:
Nidec Corporation, Kyoto, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02K 21/16 (2006.01); H02K 1/27 (2006.01); H02K 1/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A spindle motor according to an embodiment of the invention includes a rotor hub formed of a ferromagnetic material and a rotor magnet held by the rotor hub. The rotor hub has a flange having a shield surface that faces an upper end surface of the rotor magnet via a clearance in the axial direction and formed of a ferromagnetic material. On the outside in the radial direction of an outer peripheral surface of the rotor magnet in the flange, a rim projected downward from the shield surface of the flange is formed.