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:
Apr. 29, 2014
Filed:
Apr. 17, 2013
Zf Friedrichshafen Ag, Friedrichshafen, DE;
Heribert Scherer, Meckenbeuren, DE;
Gert Bauknecht, Friedrichshafen, DE;
Peter Ziemer, Tettnang, DE;
ZF Friedrichshafen AG, Friedrichshafen, DE;
Abstract
A motor vehicle multi-stage planetary transmission which has a housing that accommodates four planetary gear sets (P, P, P, P), shafts (-), three clutches (K, K, K) and three brakes (B, B, B) whose selective actuation implements various transmission ratios between drive and output shafts. The carriers of gear sets (P, P) are connected by shaft (), the ring gear of gear set (P) can be fixed to the housing, via shaft (), by actuating brake (B). A ring gear of gear set (P) and a sun gear of gear set (P) are coupled by shaft () which can be connected, via clutch (K), to the drive shaft. A sun gear of gear set (P) can be fixed, via brake (B), to the housing and can be coupled, by clutch (K), to drive shaft. The first and second clutches (K, K) are startup elements which initiate startup procedures.