Patents by Inventor Chang-Kun CHUN

Chang-Kun CHUN 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 welding hollow structure
    Patent number: 8590767
    Abstract: In the method for welding a hollow structure of the present invention, a rib is placed between a first joining member and a second joining member, and friction stir welding and fixing a place where the rib is placed between the first and the second joining member are conducted. Thus, friction stir welding is accomplished without changing the shape of an extrusion part or partly changing the shape of the extrusion part with insertion of a simply shaped rib.
    Type: Grant
    Filed: June 21, 2011
    Date of Patent: November 26, 2013
    Assignees: Research Institute of Industrial Science & Technology, Hyundai Rotem Company, Winxen Co., Ltd.
    Inventors: Chang-Kun Chun, Woong-Seong Chang, Tae-Sung Roh, In-Gyu Park
  • METHOD FOR WELDING HOLLOW STRUCTURE
    Publication number: 20120325894
    Abstract: In the method for welding a hollow structure of the present invention, a rib is placed between a first joining member and a second joining member, and friction stir welding and fixing a place where the rib is placed between the first and the second joining member are conducted. Thus, friction stir welding is accomplished without changing the shape of an extrusion part or partly changing the shape of the extrusion part with insertion of a simply shaped rib.
    Type: Application
    Filed: June 21, 2011
    Publication date: December 27, 2012
    Applicants: Research Institute of Industrial Science & Technology, WINXEN CO., LTD., HYUNDAI ROTEM COMPANY
    Inventors: Chang-Kun CHUN, Woong-Seong Chang, Tae-Sung Roh, In-Gyu Park