Patents by Inventor Elmar Schwill

Elmar Schwill 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).

  • Tandem buried arc welding
    Patent number: 9278404
    Abstract: A system and method is provided in which at least two welding power supplies are coupled to respective weld torches where the power supplies each provide a pulse welding waveform to their respective weld torches such that the welding pulses are out of phase with each other such that the respective welding pulses do not overlap during welding. The system also includes a ground current switch which switches the ground current path during welding to minimize arc interference and arc blow.
    Type: Grant
    Filed: February 3, 2012
    Date of Patent: March 8, 2016
    Assignee: LINCOLN GLOBAL, INC.
    Inventors: Timothy O'Donnell, Elmar Schwill
  • TANDEM BURIED ARC WELDING
    Publication number: 20130200054
    Abstract: A system and method is provided in which at least two welding power supplies are coupled to respective weld torches where the power supplies each provide a pulse welding waveform to their respective weld torches such that the welding pulses are out of phase with each other such that the respective welding pulses do not overlap during welding. The system also includes a ground current switch which switches the ground current path during welding to minimize arc interference and arc blow.
    Type: Application
    Filed: February 3, 2012
    Publication date: August 8, 2013
    Applicant: LINCOLN GLOBAL, INC.
    Inventors: Timothy O'Donnell, Elmar Schwill
  • SPIRALLY WELDED CONICAL TOWER SECTIONS
    Publication number: 20100095508
    Abstract: An apparatus and method for manufacturing conical tower sections is provided in which a plate member is continuously rolled such that a conical shape is imparted on the tower section. A plate is rolled such that a seam angle is continuously changed to effect a diameter change in the tower section to create conical shape.
    Type: Application
    Filed: October 22, 2008
    Publication date: April 22, 2010
    Applicant: LINCOLN GLOBAL, INC.
    Inventors: Patrick Wahlen, Elmar Schwill, Teresa Melfi