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:
Sep. 06, 2005
Filed:
Oct. 09, 2003
Mark Christofis, Troy, MI (US);
Rex R. Corless, Sterling Heights, MI (US);
Rajendra G. Kumashi, Clarkston, MI (US);
William R. Miller, Jr., South Lyon, MI (US);
Norman Szalony, Brighton, MI (US);
Ted Szczomak, Shelby Township, MI (US);
Mark Christofis, Troy, MI (US);
Rex R. Corless, Sterling Heights, MI (US);
Rajendra G. Kumashi, Clarkston, MI (US);
William R. Miller, Jr., South Lyon, MI (US);
Norman Szalony, Brighton, MI (US);
Ted Szczomak, Shelby Township, MI (US);
Visteon Global Technologies, Inc., Van Buren Township, MI (US);
Abstract
A method of induction heat treatment of articles having curved outer surfaces, such as differential housings. The method employs a semi-rectangular induction coil that is adapted to provide a plurality of lateral magnetic fields that are used to induce currents in, and thereby provide heat to, a portion of the curved section of the article. The method and induction coil are particularly adapted to provide an induction hardening heat treatment of a curved heat treatment portion of a differential housing. The differential housing was cast from nodular iron. The induction-hardening heat treatment comprised heating the heat treatment portion of the differential housing above the austenite transition temperature and quenching to below the martensite transformation temperature.