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. 08, 2005
Filed:
Aug. 28, 2003
Ralf Dreibholz, Meckenbeuren, DE;
Gerhard Gumpoltsberger, Friedrichshafen, DE;
Michael Ebenhoch, Friedrichshafen, DE;
Ralf Dreibholz, Meckenbeuren, DE;
Gerhard Gumpoltsberger, Friedrichshafen, DE;
Michael Ebenhoch, Friedrichshafen, DE;
ZF Friedrichshafen AG, Friedrichshafen, DE;
Abstract
A transmission is described, in particular an automatic transmission, which has several shift control elements (A, B, C, D, E) and several gearwheels () which can be engaged via the shift control elements (A to E) to form a power flow, in which, to establish a transmission ratio in each case at least one of the shift control elements (A to E) is closed. The shift control elements (B, C, E), which are engaged during an up-shift, are formed as frictional shift control elements, and the shift control elements (A, D), which during up-shifts respectively only constitute a shift control element to be disengaged, are made as positive-locking gear elements.