Patent · US Expired

Step-change gearbox

US6668670B1 · kind B1 · utility

1Cited by

7References

2Claims

0Family size

Assignee

ZF FRIEDRICHSHAFEN AG · DE

Inventors

Gerhard Führer · Friedrichshafen, DE
Hermann Lanz · Frickingen, DE
Roland Stauber · Friedrichshafen, DE

Key dates

Filing date	Apr 24, 2002
Grant date	Dec 30, 2003
Priority date	—
Expiry date	May 9, 2022

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T74/19233
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

Multi-speed step-change transmission for commercial vehicles having an one input shaft, a main shaft placed in an axial extension, one countershaft parallel thereto and one intermediate shaft parallel to the two shafts for the reverse gear and the shafts have gear wheels forming the ratio steps of the transmission. The sum of the tip radii of the intermediate gear (3) for the reverse gear and of the main shaft gear (1) for the first gear is smaller than the axial separation (a) between the main shaft (5) and the intermediate shaft (6).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.