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. 20, 2014
Filed:
Nov. 21, 2011
Stefan Beck, Eriskirch, DE;
Gerhard Gumpoltsberger, Friedrichshafen, DE;
Christian Sibla, Friedrichshafen, DE;
Michael Wechs, Lindau, DE;
Juergen Wafzig, Eriskirch, DE;
Stefan Beck, Eriskirch, DE;
Gerhard Gumpoltsberger, Friedrichshafen, DE;
Christian Sibla, Friedrichshafen, DE;
Michael Wechs, Lindau, DE;
Juergen Wafzig, Eriskirch, DE;
ZF Friedrichshafen AG, Friedrichshafen, DE;
Abstract
A multi-step transmission having a housing accommodating eight shafts and four planetary gearsets (), and at least six shift elements comprising brakes and clutches which implement different transmission ratios between a drive shaft and output shaft. A carrier of gearset () is connected to shaft () which can be fixed, via brake (), to the housing and further is connectable, via a first clutch, to shaft () which is coupled to a carrier of gearset () and is connectable, via a second clutch, to the drive shaft. A ring gear of gearset () is coupled to shaft () which can be fixed, via brake (), to the housing. The drive shaft is additionally coupled to a sun gear of gearset (). A ring gear of gearset () is connected to shaft (). The gearset () is a plus planetary gearset.