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. 19, 2013
Filed:
Feb. 04, 2009
Gert Bauknecht, Friedrichshafen, DE;
Gerhard Gumpoltsberger, Friedrichshafen, DE;
Peter Ziemer, Tettnang, DE;
Mark Mohr, Tettnang, DE;
Gert Bauknecht, Friedrichshafen, DE;
Gerhard Gumpoltsberger, Friedrichshafen, DE;
Peter Ziemer, Tettnang, DE;
Mark Mohr, Tettnang, DE;
ZF Friedrichshafen AG, Friedrichshafen, DE;
Abstract
A multi-stage transmission comprising planetary gearsets (P, P, P, P), shafts, and shift elements. Gearsets (P, P) form a front -mounted gear gearset and gearsets (P, P) form a main gearset. The carriers of gearsets (P, P) are coupled via shaft () which couples a main gearset element. The ring gear of gearset (P) couples the sun gear of gearset (P) via shaft () that couples drive shaft () via clutch (). The sun gear of gearset (P) couples housing (G) by shaft () via brake (), and shaft () via clutch (). The ring gear of gearset (P) couples housing (G) by shaft () via brake (). Shaft () couples main gearset element, and, via brake (), housing (G). Shaft () couples another main gearset element and, via clutch (), shaft (). The output shaft couples a further main gearset element.