Patents Examined by Ta Ba Hoang
  • Induction heating system with a flexible coil
    Patent number: 6229126
    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.
    Type: Grant
    Filed: May 5, 1998
    Date of Patent: May 8, 2001
    Assignee: Illinois Tool Works Inc.
    Inventors: Mark Ulrich, David M. Bickel, Don Wiseman, Randall Baxter