US 12,446,119 B2
Induction heating head
Paul D. Verhagen, Appleton, WI (US); Tiffany Anne Carter, Appleton, WI (US); and Alan Dale Sherrill, Appleton, WI (US)
Assigned to Illinois Tool Works Inc., Glenview, IL (US)
Filed by Illinois Tool Works Inc., Glenview, IL (US)
Filed on Apr. 30, 2020, as Appl. No. 16/863,231.
Application 16/863,231 is a continuation of application No. 13/770,010, filed on Feb. 19, 2013, granted, now 10,645,763.
Prior Publication US 2020/0260535 A1, Aug. 13, 2020
This patent is subject to a terminal disclaimer.
Int. Cl. H05B 6/10 (2006.01); H05B 6/14 (2006.01); H05B 6/36 (2006.01); H05B 6/42 (2006.01)
CPC H05B 6/101 (2013.01) [H05B 6/14 (2013.01); H05B 6/365 (2013.01); H05B 6/42 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An induction heating head comprising:
a conductive coil, wherein the conductive coil is wound in a stacked pancake spiral pattern having at least two layers and at least two turns in each layer to induce heat in a workpiece, wherein each layer is wound in a spiral pattern in a single plane;
a flux concentrator, disposed on a first face of the conductive coil and around a circumference of the conductive coil, whereby the flux concentrator concentrates flux toward a second face of the induction head opposite the first face, and wherein the conductive coil is held in a fixed position with respect to the flux concentrator, and wherein the second face is comprised of a wear surface disposed to prevent the coil from contacting the workpiece; and
a thermal insulator disposed between the coil and the wear surface.