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. 16, 2007
Filed:
Jul. 22, 2003
Kazuya Kimura, Kariya, JP;
Hiroyuki Gennami, Kariya, JP;
Kazuhiro Kuroki, Kariya, JP;
Ken Suitou, Kariya, JP;
Yoshikazu Fukutani, Kariya, JP;
Kazuya Kimura, Kariya, JP;
Hiroyuki Gennami, Kariya, JP;
Kazuhiro Kuroki, Kariya, JP;
Ken Suitou, Kariya, JP;
Yoshikazu Fukutani, Kariya, JP;
Kabushiki Kaisha Toyota Jidoshokki, Aichi-Ken, JP;
Abstract
An electric motor includes a housing and a circular stator. The housing has an inner circumferential surface. The housing also has a first predetermined thermal expansion coefficient. The housing further has an elastic part. The stator core is pressed to an inside of the housing by tight fit. The stator core has an outer circumferential surface. The stator core also has a second predetermined thermal expansion coefficient that is different from the first predetermined thermal expansion coefficient. A void is defined between the inner circumferential surface and the outer circumferential surface so as to prevent the inner and the outer circumferential surfaces from contacting each other in a circular region. When the housing and the stator core expand or shrink so as to tightly fit each other due to a differential between the first and second predetermined thermal expansion coefficients, the elastic part corresponding to the void is elastically deformed.