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:
May. 05, 2015
Filed:
Aug. 03, 2011
Ralf Dreibholz, Meckenbeuren, DE;
Juergen Wafzig, Eriskirch, DE;
Michael Wechs, Lindau, DE;
Markus Renninger, Oerlenbach, DE;
Thomas Rosemeier, Meckenbeuren, DE;
Johannes Kaltenbach, Friedrichshafen, DE;
Rudolf Kauffeldt, Bodolz, DE;
Ralf Dreibholz, Meckenbeuren, DE;
Juergen Wafzig, Eriskirch, DE;
Michael Wechs, Lindau, DE;
Markus Renninger, Oerlenbach, DE;
Thomas Rosemeier, Meckenbeuren, DE;
Johannes Kaltenbach, Friedrichshafen, DE;
Rudolf Kauffeldt, Bodolz, DE;
ZF Friedrichshafen AG, Friedrichshafen, DE;
Abstract
A double clutch transmission of countershaft design having a central shaft and a concentric hollow transmission shaft, one countershaft, and two power-shift elements. Two hollow shafts are disposed on the countershaft coaxially to the countershaft, each of which can be fixed, via one shift device, to the countershaft, and to which at least two gearwheels are fixed. A further hollow shaft is coaxially provided on either the central or hollow transmission shafts and can be connected, via a shift device, to the central or hollow transmission shaft, and to which at least two further gearwheels of the gear stages are fixed. At least three transmission ratios are possible by engaging three of the gear stages on the shift-element side into the power flow, thereby enabling one transmission ratio to be at least partially implemented by a respective sole engagement on the shift-element side into the power flow.