Patent · US Expired

Method of making a bearing ring for a large roller bearing

US7146735B2 · kind B2 · utility

9Cited by

14References

6Claims

0Family size

Assignee

Rothe Erde GmbH · DE

Inventors

Josef Bracht · Erwitte, DE
Jörg Rollmann · Lippstadt, DE
Bernd Stakemeier · Erwitte, DE
Johannes Wozniak · Lippstadt, DE

Key dates

Filing date	Jun 11, 2003
Grant date	Dec 12, 2006
Priority date	—
Expiry date	Jul 31, 2023

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T29/49707
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A bearing ring for a large roller bearing is formed with at least one annular race which is hardened by heating by juxtaposing that race with an inductor across a spacing which is maintained during the heating and then quenching. The spacing is controlled selectively so that it is:

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