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:
Dec. 12, 2006
Filed:
Jun. 11, 2003
Applicants:
Josef Bracht, Erwitte, DE;
Jörg Rollmann, Waltrop, DE;
Bernd Stakemeier, Erwitte, DE;
Johannes Wozniak, Lippstadt, DE;
Inventors:
Josef Bracht, Erwitte, DE;
Jörg Rollmann, Waltrop, DE;
Bernd Stakemeier, Erwitte, DE;
Johannes Wozniak, Lippstadt, DE;
Assignee:
Rothe Erde GmbH, Dortmund, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21D 53/10 (2006.01); C21D 9/40 (2006.01); H05B 6/10 (2006.01);
U.S. Cl.
CPC ...
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: