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:
Jul. 19, 2011
Filed:
Dec. 03, 2010
Michael Kamm, Bodnegg, DE;
Gabor Diosi, Friedrichshafen, DE;
Josef Haupt, Tettnang, DE;
Gerhard Gumpoltsberger, Friedrichshafen, DE;
Peter Ziemer, Tettnang, DE;
Martin Brehmer, Constance, DE;
Michael Kamm, Bodnegg, DE;
Gabor Diosi, Friedrichshafen, DE;
Josef Haupt, Tettnang, DE;
Gerhard Gumpoltsberger, Friedrichshafen, DE;
Peter Ziemer, Tettnang, DE;
Martin Brehmer, Constance, DE;
ZF Friedrichshafen AG, Friedrichshafen, DE;
Abstract
A multi-speed automatic transmission of a planetary design for a motor vehicle, the transmission comprises an input shaft (AN) and an output shaft (AB); first, second, third and fourth planetary gear sets (RS, RS, RS, RS); and at least third, fourth, fifth, sixth, seventh and eighth rotatable shafts () and first, second, third, fourth and fifth shifting elements (A, B, C, D, E) whose selective engagement defines different gear ratios between the input shaft (AN) and the output shaft (AB) such that eight forward gears and at least one reverse gear can be implemented. When shifting from one forward gear into one of a successive higher and a successive lower forward gear, only a single one of the first, the second, the third, the fourth and the fifth shift elements is disengaged and only a single one of the first, the second, the third, the fourth and the fifth shift elements is engaged.