Patents by Inventor Chang Keon Cho

Chang Keon Cho 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).

  • Steel structure including pre-stressing brackets for improving load-carrying capacity and serviceability
    Patent number: 8621797
    Abstract: A steel structure including pre-stressing brackets for improving load-carrying capacity and serviceability comprises: a steel girder; a plurality of connecting brackets connected to the bottom surface of the steel girder spaced and apart from one; and a cover plate connected to the bottom surfaces of the connecting brackets. Since the cover plate is installed regardless of the connecting portion of the steel girder, pre-stressing section can be consecutively formed therefore pre-stress effect is improved. Moreover, since the connecting brackets space the cover plate a constant distance from the steel girder, the moment of inertia is increased so the span of a bridge might be increased.
    Type: Grant
    Filed: May 4, 2011
    Date of Patent: January 7, 2014
    Assignees: Yooho Development & Construction Co. Ltd., Industry-Academic Cooperation Foundation, Yonsei University
    Inventors: Sang Hyo Kim, Jin Hee Ahn, Jung Ho Yoo, Seung Soo Han, Chang Keon Cho, Kyu Tae Choi
  • STEEL STRUCTURE INCLUDING PRE-STRESSING BRACKETS FOR IMPROVING LOAD-CARRYING CAPACITY AND SERVICEABILITY
    Publication number: 20130097947
    Abstract: A steel structure including pre-stressing brackets for improving load-carrying capacity and serviceability comprises: a steel girder; a plurality of connecting brackets connected to the bottom surface of the steel girder spaced and apart from one; and a cover plate connected to the bottom surfaces of the connecting brackets. Since the cover plate is installed regardless of the connecting portion of the steel girder, pre-stressing section can be consecutively formed therefore pre-stress effect is improved. Moreover, since the connecting brackets space the cover plate a constant distance from the steel girder, the moment of inertia is increased so the span of a bridge might be increased.
    Type: Application
    Filed: May 4, 2011
    Publication date: April 25, 2013
    Inventors: Sang Hyo Kim, Jin Hee Ahn, Jung Ho Yoo, Seung Soo Han, Chang Keon Cho, Kyu Tae Choi