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:
Aug. 09, 2005
Filed:
Mar. 27, 2002
Eberhard Biermann, Ravensburg, DE;
Eberhard Biermann, Ravensburg, DE;
ZF Friedrichshafen AG, Friedrichshafen, DE;
Abstract
A multi-speed transmission with an input shaft () and an output shaft () with two spur gear speeds (ST, ST) that are connected tightly on the input side with the input shaft () and generate two output rotational speeds (n, n), with a main gearset that is connected with the output shaft () and is constructed as a two webbed four shaft transmission with two coupled, shiftable planetary gearsets (RS, RS) to which the output rotational speeds (n, n) of the spur gear speeds (ST, ST) are transferable through several shifting elements (A to E) through their selective closing to the clutch of at least six forward gears and can be shifted without group shifting. A total of six shifting elements (A to F) are provided. The output rotational speed (n) of the first spur gear speed (ST) is transferable through the sixth shifting element (F) to the second shaft of the main gearset, and at least eight forward gears and maximally two reverse gears are shiftable.