Patents by Inventor John W. Hamer, III

John W. Hamer, III 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).

  • VARIABLE SWITCHING FREQUENCY POWER SUPPLY FOR PLASMA CUTTERS AND PLASMA ARC WELDERS
    Publication number: 20180281099
    Abstract: A power supply, for a plasma cutter or a plasma arc welder, having a variable switching frequency and method of operating the power supply is generally disclosed. The power supply includes a switch for setting the switching frequency and a chopper control circuit for determining current output from the power supply, determining an operating frequency based on the determined current output and setting the switching frequency based on the determined operating frequency.
    Type: Application
    Filed: January 29, 2018
    Publication date: October 4, 2018
    Inventors: Philip K. Higgins, Karunakar Gujja, John W. Hamer, III
  • Variable switching frequency power supply plasma cutters
    Patent number: 9908196
    Abstract: A power supply, for a plasma cutter or a plasma arc welder, having a variable switching frequency and method of operating the power supply is generally disclosed. The power supply includes a switch for setting the switching frequency and a chopper control circuit for determining current output from the power supply, determining an operating frequency based on the determined current output and setting the switching frequency based on the determined operating frequency.
    Type: Grant
    Filed: April 10, 2014
    Date of Patent: March 6, 2018
    Assignee: The ESAB Group Inc.
    Inventors: Philip K. Higgins, Karunakar Gujja, John W. Hamer, III
  • Variable Switching Frequency Power Supply Plasma Cutters
    Publication number: 20160067812
    Abstract: A power supply, for a plasma cutter or a plasma arc welder, having a variable switching frequency and method of operating the power supply is generally disclosed. The power supply includes a switch for setting the switching frequency and a chopper control circuit for determining current output from the power supply, determining an operating frequency based on the determined current output and setting the switching frequency based on the determined operating frequency.
    Type: Application
    Filed: April 10, 2014
    Publication date: March 10, 2016
    Applicant: The ESAB Group, Inc.
    Inventors: Philip K. Higgins, Karunakar Gujja, John W. Hamer, III