Patents by Inventor Markus Liedtke

Markus Liedtke 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).

  • Method for connecting thick-walled metal workpieces by welding
    Patent number: 8373083
    Abstract: The invention relates to a method for connecting thick-walled metal workpieces by welding. In order to create the weld joint, the cross-sections are provided with a maximum of three weld regions according to wall thickness, the welding being carried out by a combined use of welding methods: the first weld region (root) is welded by means of laser beam welding or hybrid laser-arc welding, the second weld region is welded by means of hybrid laser-arc welding, and the third weld region required occasionally depending on the thickness of the sheet metal is welded by means of hybrid laser-arc welding or simply arc welding. The invention also relates to a seam preparation corresponding to the respective welding method used.
    Type: Grant
    Filed: June 26, 2008
    Date of Patent: February 12, 2013
    Assignee: V & M Deutschland GmbH
    Inventors: Steffen Keitel, Jan Neubert, Wolfgang Scheller, Markus Liedtke, Christian Caesar
  • METHOD AND DEVICE FOR CONNECTING THICK-WALLED METAL WORKPIECES BY WELDING
    Publication number: 20100206850
    Abstract: The invention relates to a method for connecting thick-walled metal workpieces by welding. In order to create the weld joint, the cross-sections are provided with a maximum of three weld regions according to wall thickness, the welding being carried out by a combined use of welding methods: the first weld region (root) is welded by means of laser beam welding or hybrid laser-arc welding, the second weld region is welded by means of hybrid laser-arc welding, and the third weld region required occasionally depending on the thickness of the sheet metal is welded by means of hybrid laser-arc welding or simply arc welding. The invention also relates to a seam preparation corresponding to the respective welding method used.
    Type: Application
    Filed: June 26, 2008
    Publication date: August 19, 2010
    Applicant: V & M DEUTSCHLAND GMBH
    Inventors: Steffen Keitel, Jan Neubert, Wolfgang Scheller, Markus Liedtke, Christian Caesar