Patents by Inventor Tom Bunker

Tom Bunker 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).

  • Engine driven welder with field current boost
    Patent number: 6528765
    Abstract: A method and apparatus for a generator driven CV welding power supply includes a generator driven by an engine, and a CV electronic field controller. The generator includes a field winding and a welding output winding. The electronic field controller is connected to the field winding and has an engine feedback input. The controller also has a voltage boost circuit responsive to the engine RPM (or engine speed command signal). A wire feeder includes a motor powered by the generator output, and the boosted field current helps start the wire feeder when the engine is idling. The speed of the engine is reduced when there is no welding arc.
    Type: Grant
    Filed: December 19, 2001
    Date of Patent: March 4, 2003
    Assignee: Illinois Tool Works Inc.
    Inventors: Tom Bunker, John Leisner
  • Engine driven welder with field current boost
    Publication number: 20020053560
    Abstract: A method and apparatus for a generator driven CV welding power supply includes a generator driven by an engine, and a CV electronic field controller. The generator includes a field winding and a welding output winding. The electronic field controller is connected to the field winding and has an engine feedback input. The controller also has a voltage boost circuit responsive to the engine RPM (or engine speed command signal). A wire feeder includes a motor powered by the generator output, and the boosted field current helps start the wire feeder when the engine is idling. The speed of the engine is reduced when there is no welding arc.
    Type: Application
    Filed: December 19, 2001
    Publication date: May 9, 2002
    Applicant: Illinois Tool Works Inc.
    Inventors: Tom Bunker, John Leisner
  • Engine driven welder with field current boost
    Patent number: 6359259
    Abstract: A method and apparatus for a generator driven CV welding power supply includes a generator driven by an engine, and a CV electronic field controller. The generator includes a field winding and a welding output winding. The electronic field controller is connected to the field winding and has an engine feedback input. The controller also has a voltage boost circuit responsive to the engine RPM (or engine speed command signal). A wire feeder includes a motor powered by the generator output, and the boosted field current helps start the wire feeder when the engine is idling. The speed of the engine is reduced when there is no welding arc.
    Type: Grant
    Filed: September 24, 1999
    Date of Patent: March 19, 2002
    Assignee: Illinois Tool Works Inc.
    Inventors: Tom Bunker, John Leisner