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:
Jan. 10, 2012
Filed:
May. 15, 2009
Koji Muraoka, Kyoto, JP;
Junpei Kitamura, Kyoto, JP;
Masashi Hirayama, Kyoto, JP;
Takuya Teramoto, Kyoto, JP;
Hiroyoshi Teshima, Kyoto, JP;
Yuji Yabuuchi, Kyoto, JP;
Koji Muraoka, Kyoto, JP;
Junpei Kitamura, Kyoto, JP;
Masashi Hirayama, Kyoto, JP;
Takuya Teramoto, Kyoto, JP;
Hiroyoshi Teshima, Kyoto, JP;
Yuji Yabuuchi, Kyoto, JP;
Nidec Corporation, Kyoto, JP;
Abstract
An electric motor includes a stator portion, a rotor portion, and a bearing mechanism, wherein the rotor portion includes a rotor holder having a substantially cylindrical shape with a closed end, and a field magnet fixed to an inner circumference of the rotor holder; the stator portion includes a stator, a base portion to which the stator is fixed, and a magnetic member; and the magnetic member includes a cylindrical portion having a substantially cylindrical shape into which a lower end portion of an insulator of the stator is inserted, the lower end portion being a portion of an outer portion of the insulator and opposing the base portion, and a flat portion having a substantially annular shape which spreads outwardly in a radial direction from a lower edge of the cylindrical portion and opposes a lower edge of the field magnet.