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:
Nov. 12, 2013
Filed:
Oct. 13, 2008
Gerhard Gumpoltsberger, Friedrichshafen, DE;
Matthias Reisch, Ravensburg, DE;
Ralf Dreibholz, Meckenbeuren, DE;
Mark Mohr, Tettnang, DE;
Gerhard Gumpoltsberger, Friedrichshafen, DE;
Matthias Reisch, Ravensburg, DE;
Ralf Dreibholz, Meckenbeuren, DE;
Mark Mohr, Tettnang, DE;
ZF Friedrichshafen AG, Friedrichshafen, DE;
Abstract
A power shift parallel shift transmission with parallel torque transmission branches, the input sides of which have an intermediate element which can be connected by an associated power shift element to a common input element, and the output sides of which can be connected by drive output elements with a common output element and can be connected to the appropriate intermediate element by a transmission ratio step that is engaged by an associated clutch. The transmission ratio steps are sequentially distributed in alternation in the order of their transmission ratios across the intermediate elements and in groups of adjacent transmission ratios across the drive output elements. To simply increase the number of gear steps in a space-saving manner, at least one of the drive output elements is in driving connection with the common output element via at least two alternatively shiftable output transmission ratio steps that have different transmission ratios.