Patents by Inventor Randall Joseph DuVal

Randall Joseph DuVal 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-generator with chopper circuit
    Patent number: 9381593
    Abstract: An engine driven welder-generator including a chopper circuit and being adapted to produce an AC weld output, a DC weld output, and an auxiliary output is provided. The engine driven welder-generator is capable of selectively running at a low engine speed or a high engine speed based on operator inputs and may produce both AC and DC power outputs while utilizing the chopper circuit. The engine driven welder-generator is also adapted to provide an auxiliary output during an AC welding process and a DC welding process.
    Type: Grant
    Filed: October 13, 2014
    Date of Patent: July 5, 2016
    Assignee: ILLINOIS TOOL WORKS INC.
    Inventors: Randall Joseph DuVal, Daniel C. Fosbinder
  • ENGINE DRIVEN WELDER-GENERATOR WITH CHOPPER CIRCUIT
    Publication number: 20150028013
    Abstract: An engine driven welder-generator including a chopper circuit and being adapted to produce an AC weld output, a DC weld output, and an auxiliary output is provided. The engine driven welder-generator is capable of selectively running at a low engine speed or a high engine speed based on operator inputs and may produce both AC and DC power outputs while utilizing the chopper circuit. The engine driven welder-generator is also adapted to provide an auxiliary output during an AC welding process and a DC welding process.
    Type: Application
    Filed: October 13, 2014
    Publication date: January 29, 2015
    Inventors: Randall Joseph DuVal, Daniel C. Fosbinder
  • Engine driven welder-generator with chopper circuit
    Patent number: 8859937
    Abstract: An engine driven welder-generator including a chopper circuit and being adapted to produce an AC weld output, a DC weld output, and an auxiliary output is provided. The engine driven welder-generator is capable of selectively running at a low engine speed or a high engine speed based on operator inputs and may produce both AC and DC power outputs while utilizing the chopper circuit. The engine driven welder-generator is also adapted to provide an auxiliary output during an AC welding process and a DC welding process.
    Type: Grant
    Filed: July 26, 2013
    Date of Patent: October 14, 2014
    Assignee: Illinois Tool Works Inc.
    Inventors: Randall Joseph DuVal, Daniel C. Fosbinder
  • ENGINE DRIVEN WELDER-GENERATOR WITH CHOPPER CIRCUIT
    Publication number: 20130306611
    Abstract: An engine driven welder-generator including a chopper circuit and being adapted to produce an AC weld output, a DC weld output, and an auxiliary output is provided. The engine driven welder-generator is capable of selectively running at a low engine speed or a high engine speed based on operator inputs and may produce both AC and DC power outputs while utilizing the chopper circuit. The engine driven welder-generator is also adapted to provide an auxiliary output during an AC welding process and a DC welding process.
    Type: Application
    Filed: July 26, 2013
    Publication date: November 21, 2013
    Applicant: Illinois Tool Works Inc.
    Inventors: Randall Joseph DuVal, Daniel C. Fosbinder
  • Engine driven welder-generator with chopper circuit
    Patent number: 8502115
    Abstract: An engine driven welder-generator including a chopper circuit and being adapted to produce an AC weld output, a DC weld output, and an auxiliary output is provided. The engine driven welder-generator is capable of selectively running at a low engine speed or a high engine speed based on operator inputs and may produce both AC and DC power outputs while utilizing the chopper circuit. The engine driven welder-generator is also adapted to provide an auxiliary output during an AC welding process and a DC welding process.
    Type: Grant
    Filed: April 7, 2010
    Date of Patent: August 6, 2013
    Assignee: Illinois Tool Works Inc.
    Inventors: Randall Joseph DuVal, Daniel C. Fosbinder
  • ENGINE DRIVEN WELDER-GENERATOR WITH CHOPPER CIRCUIT
    Publication number: 20100314372
    Abstract: An engine driven welder-generator including a chopper circuit and being adapted to produce an AC weld output, a DC weld output, and an auxiliary output is provided. The engine driven welder-generator is capable of selectively running at a low engine speed or a high engine speed based on operator inputs and may produce both AC and DC power outputs while utilizing the chopper circuit. The engine driven welder-generator is also adapted to provide an auxiliary output during an AC welding process and a DC welding process.
    Type: Application
    Filed: April 7, 2010
    Publication date: December 16, 2010
    Applicant: Illinois Tool Works Inc.
    Inventors: Randall Joseph DuVal, Daniel C. Fosbinder