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:
Sep. 02, 2014
Filed:
Nov. 26, 2010
Tetsuhiro Takenaka, Miyoshi, JP;
Tetsuhiro Takenaka, Miyoshi, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A torsional vibration attenuation apparatus includes a driving rotation member and a driven rotation member which can be twisted in an enlarged torsion angle range with a non-linear torsional property, thereby preventing an excessively large torque from being transmitted from driving member to the driven member. The torsional vibration attenuation apparatus includes a boss, a cam member having a cam surface formed in an elliptical shape and provided on the outer peripheral portion of the boss to be integrally rotated with the boss, and a pair of arm members each provided between the cam member and a coil spring and having one end held in contact with the can surface and the other end held in engagement with a spring seat of the coil spring.