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:
Mar. 26, 2013
Filed:
Nov. 04, 2009
Vijay A. Neelakantan, Rochester Hills, MI (US);
Bret M. Olson, Whitelake, MI (US);
Jesse B. Bradley, Royal Oak, MI (US);
Ajit S. Grewal, Canton, MI (US);
Vijay A. Neelakantan, Rochester Hills, MI (US);
Bret M. Olson, Whitelake, MI (US);
Jesse B. Bradley, Royal Oak, MI (US);
Ajit S. Grewal, Canton, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A shift mechanism for a dual clutch transmission employs a rotating barrel cam having at least three tracks which are engaged by and translate at least three associated cam followers. The cam followers extend from shift fork bodies which slide on rails and include shift forks which bi-directionally translate at least three synchronizer clutches which engage at least five forward gears or speeds and reverse. A single electric motor and gear train drive the barrel cam.