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:
Jun. 16, 2015
Filed:
Apr. 09, 2013
GM Global Technology Operations Llc, Detroit, MI (US);
Shanghai Jiao Tong University, Shanghai, CN;
Li Chen, Shanghai, CN;
Jian Yao, Shanghai, CN;
Chunhao J. Lee, Troy, MI (US);
Chengliang Yin, Shanghai, CN;
Chi-Kuan Kao, Troy, MI (US);
Farzad Samie, Franklin, MI (US);
Dongxu Li, Warren, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Shanghai Jiao Tong University, Shanghai, CN;
Abstract
An actuation system for actuating a clutch piston of a transmission includes an actuator and a lever. A first end of the lever is attached to the actuator. The lever is pivotable about a lever connection location. Movement of the actuator rotates the lever about the lever connection location. A spring assembly is pivotable about a spring connection location, and pivotably connected to the lever at a second end of the lever. When the actuator is disposed in an un-actuated position, the spring assembly is positioned such that a pre-loaded spring force is directed along a zero moment path to generate a zero moment in the lever. When the actuator is disposed in an actuated position, the spring assembly is rotated so that the spring force is directed along a moment generating path in order to generate a moment in the lever to rotate the lever.