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. 08, 2005
Filed:
Aug. 06, 2003
Atsushi Hase, Okazaki, JP;
Akira Hiramitsu, Okazaki, JP;
Yasuo Kinoshita, Aichi-ken, JP;
Yasuharu Terada, Toyota, JP;
Yuji Sekitomi, Anjo, JP;
Atsushi Hase, Okazaki, JP;
Akira Hiramitsu, Okazaki, JP;
Yasuo Kinoshita, Aichi-ken, JP;
Yasuharu Terada, Toyota, JP;
Yuji Sekitomi, Anjo, JP;
Toyoda Koki Kabushiki Kaisha, Kariya, JP;
Abstract
In a rotor having plural permanent magnets secured on a rotary shaft for use in, e.g., an electric motor which is incorporated preferably into a rack-type electric power steering device, a cylindrical cover is fit on the rotary shaft to cover the external surfaces of the plural permanent magnets, and one or both axial end portions of the cylindrical cover are plastically deformed thereby to secure the cylindrical cover onto the rotary shaft. Thus, the cylindrical cover is firmly secured to the rotary shaft and, even when one or more permanent magnets are separated from the rotary shaft or broken, prevents the separated permanent magnets or the broken fragments from scattering within a housing of the motor.