Patents by Inventor Paul Di Pietro

Paul Di Pietro 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).

  • Control method and system for metal arc welding
    Patent number: 7705270
    Abstract: A method of controlling an arc welding system during a welding process is disclosed. The welding process has a plurality of welding cycles in which a consumable electrode is advanced towards a workpiece. The method includes dynamically regulating a rate of advancement and instantaneous melt rate of the electrode during each welding cycle in response to predetermined events occurring during the welding process. The melt rate may be coordinated with the rate of advancement of the electrode to provide a wide range of stable deposition rates with a shielding gas such as CO2. An arc welding system for carrying out the method is also disclosed.
    Type: Grant
    Filed: May 30, 2003
    Date of Patent: April 27, 2010
    Assignee: University of Wollongong
    Inventors: John Norrish, Christopher David Cook, Dominic Cuiuri, Paul Di Pietro, Gary Dean
  • Control method and system for metal arc welding
    Publication number: 20060138115
    Abstract: A method of controlling an arc welding system during a welding process is disclosed. The welding process has a plurality of welding cycles in which a consumable electrode is advanced towards a workpiece. The method includes dynamically regulating a rate of advancement and instantaneous melt rate of the electrode during each welding cycle in response to predetermined events occurring during the welding process. The melt rate may be coordinated with the rate of advancement of the electrode to provide a wide range of stable deposition rates with a shielding gas such as CO2. An arc welding system for carrying out the method is also disclosed.
    Type: Application
    Filed: May 30, 2003
    Publication date: June 29, 2006
    Inventors: John Norrish, Christopher Cook, Dominic Cuiuri, Paul Di Pietro, Gary Dean
  • Simulator and optimizer of laser cutting process
    Patent number: 5854751
    Abstract: A system and method for stabilizing the cutting front temperature of a laser beam on a workpiece in order to improve the quality of the laser beam cut. The technique and system models the temperature of a virtual grid of nodes on the workpiece's surface and determines the effect of the laser beam on each node's temperature including the creation of the kerf. An optimization technique is then performed on the results from temperature model which creates a power data profile to indicate the correct level of power which the laser should be operated for every point on the laser cut. The technique and system is especially useful when boundary, turns or holes are required where the cutting conditions change creating excessive heat accumulation.
    Type: Grant
    Filed: October 15, 1996
    Date of Patent: December 29, 1998
    Assignee: The Trustees of Columbia University in the City of New York
    Inventors: Paul Di Pietro, Y. Lawrence Yao