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:
Dec. 29, 2015
Filed:
Aug. 09, 2012
Yuki Kawahara, Osaka, JP;
Hiroyuki Ushio, Shijonawate, JP;
Naoki Tomiyama, Hirakata, JP;
EXEDY Corporation, Osaka, JP;
Abstract
A lock-up device basically includes a piston, a first plate, a second plate, a plurality of outer peripheral side torsion springs and a plurality of inner peripheral side torsion springs. The piston is configured to press a friction member that is fixed to a lateral surface of the piston onto a front cover or release pressing of the friction member. Further, the piston has a plurality of engaging portions formed by partially bending the piston towards the turbine. The second plate is coupled to the turbine. The outer peripheral side torsion springs are disposed between the piston and the first plate. The outer peripheral side torsion springs are configured to transmit torque from the piston to the first plate while the circumferential ends thereof are engaged with the engaging portions of the piston.