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:
Feb. 10, 2006
Yukitoshi Ogawa, Ichinomiya, JP;
Takayuki Ishikawa, Anjou, JP;
Akihiko Kita, Anjo, JP;
Shigeo Tsuzuki, Anjo, JP;
Hiroyuki Nozaki, Anjo, JP;
Hironobu Imaizumi, Aikoh-gun, JP;
Yukitoshi Ogawa, Ichinomiya, JP;
Takayuki Ishikawa, Anjou, JP;
Akihiko Kita, Anjo, JP;
Shigeo Tsuzuki, Anjo, JP;
Hiroyuki Nozaki, Anjo, JP;
Hironobu Imaizumi, Aikoh-gun, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Aisin Aw Co., Ltd., Yokohama, JP;
NHK Spring Co., Ltd., Kanagawa, JP;
Abstract
A coned disc spring is arranged between a second component and a third component provided inside a tubular first component and movable in an axial direction. The coned disc spring comprises a body having a circular dish shape, teeth closely fitting into spline grooves formed on an inner peripheral surface of the first component and projecting to a radial outer side on an outer periphery of the body, and a stress relaxation portion formed by notching a base of the tooth in an approximately circular arc shape in a direction at least one of a circumferential direction and a radial direction of the body.