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. 23, 2004
Filed:
Jul. 11, 2002
Gerhard Führer, Friedrichshafen, DE;
Hermann Lanz, Frickingen, DE;
Roland Stauber, Friedrichshafen, DE;
Marcus Raeder, Bermatingen, DE;
ZF Friedrichshafen AG, Friedrichshafen, DE;
Abstract
In a transmission ( ) for a motor vehicle with a main transmission part ( ) which possesses a plurality of gear steps and wherein, between each step a step-jump in the gear ratio is provided, and with a split transmission part ( ) for the separation of the step-jumps of the gear steps of the main transmission part ( ) and with an area group transmission part ( ) for the extension of the over-all gear ratio of the gear steps of the main transmission part with a slow and a rapid gear ratio area, the average gear step-jump of the upper gear steps is approximately at least 0.7% less than the geometric step-jump calculated theoretically from the total gear ratio.