Patents by Inventor David M. Bickel

David M. Bickel has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Induction heating system with a flexible coil
    Patent number: 6346690
    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: September 20, 2000
    Date of Patent: February 12, 2002
    Assignee: Illinois Tool Works Inc.
    Inventors: Mark Ulrich, David M. Bickel, Don Wiseman, Randall Baxter
  • 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