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. 29, 2015
Filed:
Feb. 26, 2012
Hiroyuki Amano, Susono, JP;
Yu Miyahara, Susono, JP;
Shingo Aijima, Susono, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota-Shi, JP;
Abstract
A torsional vibration damping device in which a first rolling contact surface that is curved with a center of curvature at a location offset from a rotation center of a rotating body, which rotates upon receiving a torque, is formed along a circumferential direction of the rotating body at a location offset from the rotation center of the rotating body in a radial direction, and which includes the rolling element that is brought into contact with the first rolling contact surface by receiving a centrifugal force resulting from rotation with the rotating body and that rolls along the first rolling contact surface through torsional vibrations of the rotating body is described. The rolling element includes a first rolling element that rolls along the first rolling contact surface and that is formed in a hollow shape, and a second rolling element that is arranged inside the first rolling element such that the second rolling element rolls along a second rolling contact surface formed inside the first rolling element.