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:
Nov. 22, 2011
Filed:
Dec. 06, 2007
Ralf Boss, Kressbronn, DE;
Gerhard Gumpoltsberger, Friedrichshafen, DE;
Hans-peter Freudenreich, Griesingen, DE;
Ralf Boss, Kressbronn, DE;
Gerhard Gumpoltsberger, Friedrichshafen, DE;
Hans-Peter Freudenreich, Griesingen, DE;
ZF Friedrichshafen AG, Friedrichshafen, DE;
Abstract
Multi-stage transmission having six or seven forward gears and three reverse gears comprises three planetary gear sets (P, P, P), six rotatable shafts (), as well as six shifting elements (), whereby the shaft () is permanently connected to input element (An) and to the sun gear of the second planetary gear set (P), the shaft () is permanently connected to the output element (Ab) and the ring gear of the third planetary gear set (P), the shaft () is permanently connected to the ring gear of the second planetary gear set (P), the shaft () is permanently connected to the web of the third planetary gear set (P), the shaft () is permanently connected to the ring gear of the first planetary gear set (P), to the web of the second planetary gear set (P), and to the sun gear of the third planetary gear set (P), the shaft () is permanently connected to the web of the first planetary gear set (P), whereby the sun gear of the first planetary gear set (P) is connected torque-proof to a transmission housing (G), whereby the shafts (), () can be connected via a brake (,) to a transmission housing (G), and whereby the clutch () detachably connects the shaft () to the shaft (), the clutch () detachably connects the shaft () to the shaft (), the clutch () detachably connects the shaft () to the shaft (), and whereby a further clutch () is provided, via which the shaft () is detachably connected to the shaft (), the shaft () is detachably connected to the shaft (), or the shaft () is detachably connected to the shaft ().