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:
May. 15, 1979
Filed:
Nov. 14, 1977
Applicant:
Inventors:
Otto Dudek, Oelde, DE;
Klaus Ortmann, Witten, DE;
Lothar Reichmann, Witten, DE;
Wilhelm Schafer, Witten, DE;
Assignee:
Mannesmann Aktiengesellschaft, Dusseldorf, DE;
Primary Examiner:
Int. Cl.
CPC ...
C21D / ;
U.S. Cl.
CPC ...
148 165 ; 291592 ; 118505 ;
Abstract
A method of quench hardening a gear having a gear rim, a hub, and two rim carrying gear disk includes carburizing the gear and quenching it subsequently in a saline bath, and is improved by releasably covering the perforated disks with perforated supplemental disks, the perforations are closed during carburization but open during quenching. The gear is turned about its vertically positioned axis during quenching; the supplemental disks are removed subsequently so that the gear disks are not carburized.