| US 7,491,916 B1 | ||
| Induction coil design for portable induction heating tool and method for its use | ||
| John P. Barber, Dayton, Ohio (US); Robert C. Cravens, II, Beavercreek, Ohio (US); Antonios Challita, Bellbrook, Ohio (US); and Susan A. Stanton, Sunbury, Ohio (US) | ||
| Assigned to Nexicor LLC, Cincinnati, Ohio (US) | ||
| Filed on Jan. 31, 2007, as Appl. No. 11/700,422. | ||
| Application 11/700422 is a continuation of application No. 11/068592, filed on Feb. 28, 2005, granted, now 7,202,450. | ||
| Application 11/068592 is a continuation of application No. 10/800540, filed on Mar. 15, 2004, granted, now 6,875,966. | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. H05B 6/14 (2006.01); H05B 6/40 (2006.01) | ||
| U.S. Cl. 219—616 [219/633; 219/618; 219/673; 156/380.2] | 20 Claims |
| 1. A coil head for an induction heating apparatus, said coil head comprising:
(a) an outer member;
(b) an inner member, said inner member having an inner side wall and an outer side wall, said inner side wall forming an opening
fbr receiving a workpiece; and
(c) an induction coil disposed between said inner and outer members, said induction coil comprising an electrical winding
that runs substantially along said outer side wall of said inner member, wherein said induction coil is a primary source of
thermal energy for heating said workpiece;
further comprising: at least one external heat pipe that runs into said coil head at a location different than at said opening
for the workpiece, wherein said heat pipe tends to transfer thermal energy away from said inner side wall of said inner member,
and away from said opening; and
wherein said heat pipe is not the primary source of thermal energy for heating the workpiece.
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