Patent · US Expired

Differential gear and method of making same

US6656079B2 · kind B2 · utility

11Cited by

11References

9Claims

0Family size

Assignee

Daimlerchrysler AG · US

Inventors

Tycho Eulenstein · Kassel, DE
Willi Netuschil · Hofgeismar, DE
Rudolf Paasch · Echterdingen, DE

Key dates

Filing date	Mar 19, 2001
Grant date	Dec 2, 2003
Priority date	—
Expiry date	Mar 19, 2021

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T74/19693
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A differential gear includes a differential housing consisting of cast iron and a differential crown wheel consisting of case hardened steel. The differential gear, while being of reproducible quality, can be produced simply and cost-effectively. The differential housing has, on the circumference onto which the differential crown wheel is pressed, a bearing shoulder, to which the differential crown wheel is fastened via a nickel-containing welded joint. The composition of the welded joint is influenced by the use of a nickel-containing additional material which is added to the welding melt in the form of an annular foil arranged between the bearing shoulder and the differential crown wheel.

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