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:
Feb. 12, 2002
Filed:
Sep. 20, 2000
Applicant:
Inventors:
Mark Ulrich, New London, WI (US);
David M. Bickel, Oshkosh, WI (US);
Don Wiseman, Neenah, WI (US);
Randall Baxter, Black Creek, WI (US);
Assignee:
Illinois Tool Works Inc., Glenview, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B 6/10 ;
U.S. Cl.
CPC ...
H05B 6/10 ;
Abstract
A method and apparatus for induction heating includes a power supply, and a controller, and an induction head. The induction head includes a flexible coiled, such as one formed with Litz wire. The head also includes a thermal insulator, for disposing between the head and the workpiece. The insulator reflects heat back to the workpiece, protecting the coil, but is transparent to inductive (E-M) energy. The power supply is a variable output frequency power supply, such as one having a resonant tank, to adapt to the inductance of the head.