Patents by Inventor Ulf Andrén

Ulf Andrén 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).

  • Arc welding method and apparatus for arc welding
    Patent number: 9132501
    Abstract: An electric arc welding method is provided, wherein an electrode assembly comprises at least two fusible continuous electrodes acting on a workpiece for generating a weld pool via electric arcs, wherein the at least two electrodes are arranged in sequential order relative to a welding direction and laterally separated relative to each other, wherein steps are performed of monitoring at least one stability parameter (Stab_par) for each electrode of the electrode assembly; determining if one electrode of the electrode assembly violates a stability criterion (Crit); separating at least temporarily the one electrode violating the stability criterion (Crit) from one or more adjacent electrodes when a violation of the stability criterion (Crit) of the one electrode is detected.
    Type: Grant
    Filed: February 24, 2009
    Date of Patent: September 15, 2015
    Assignee: ESAB AB
    Inventors: Daniel Lennartsson, Tomas Johansson, Ulf Andrén, Bo Melin
  • ARC WELDING METHOD AND APPARATUS FOR ARC WELDING
    Publication number: 20120043307
    Abstract: An electric arc welding method is provided, wherein an electrode assembly comprises at least two fusible continuous electrodes acting on a workpiece for generating a weld pool via electric arcs, wherein the at least two electrodes are arranged in sequential order relative to a welding direction and laterally separated relative to each other, wherein steps are performed of monitoring at least one stability parameter (Stab_par) for each electrode of the electrode assembly; determining if one electrode of the electrode assembly violates a stability criterion (Crit); separating at least temporarily the one electrode violating the stability criterion (Crit) from one or more adjacent electrodes when a violation of the stability criterion (Crit) of the one electrode is detected.
    Type: Application
    Filed: February 24, 2009
    Publication date: February 23, 2012
    Applicant: ESAB AB
    Inventors: Daniel Lennartsson, Tomas Johansson, Ulf Andrén, Bo Melin