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:
Jun. 10, 2003
Filed:
Sep. 14, 2001
Donald K. Dabelstein, Renton, WA (US);
Matthew D. Carter, Portland, OR (US);
The Boeing Company, Chicago, IL (US);
Abstract
A method for induction heating a workpiece made of a material such as ferrous material or alloy is carried out by placing a non-magnetic conductive shield in proximity to a current concentrating surface of the workpiece and exposing the workpiece with a shield in place to a time varying magnetic field. The magnetic field induces eddy currents in the surface of the workpiece. The conductive shield is placed in sufficient proximity to reduce or eliminate the eddy currents in the portion covered by the shield. At least a part of the uncovered portion of the workpiece is heated above the austenitizing or solution temperature of the material. At the same time, the covered portions of the workpiece are protected from overheating by the shield. The workpiece is then quenched to complete the hardening process.