Patents by Inventor Won Beom CHANG

Won Beom CHANG 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).

  • Screw thread structure for preventing being pulled out and tool for manufacturing same
    Patent number: 10871182
    Abstract: The present invention provides a looseness-prevention screw thread structure including a screw thread having a predetermined pitch, a no-load flank which is an inclined surface in a direction in which the screw thread is advanced, and a load flank which is an inclined surface in a direction in which the screw thread is retracted, the no-load flank and the load flank being formed at both sides of the screw thread, in which the no-load flank of the screw thread includes: a first tangential portion which abuts against an arc portion formed at a thread crest of an opposing fastening object; and a second tangential portion which has a preset angle with respect to the first tangential portion and abuts against the arc portion.
    Type: Grant
    Filed: January 5, 2016
    Date of Patent: December 22, 2020
    Assignee: DAE KWANG METAL.CO.LTD
    Inventors: Hyeon Woo Seo, Won Beom Chang
  • SCREW THREAD STRUCTURE FOR PREVENTING BEING PULLED OUT AND TOOL FOR MANUFACTURING SAME
    Publication number: 20180003212
    Abstract: The present invention provides a looseness-prevention screw thread structure including a screw thread having a predetermined pitch, a no-load flank which is an inclined surface in a direction in which the screw thread is advanced, and a load flank which is an inclined surface in a direction in which the screw thread is retracted, the no-load flank and the load flank being formed at both sides of the screw thread, in which the no-load flank of the screw thread includes: a first tangential portion which abuts against an arc portion formed at a thread crest of an opposing fastening object; and a second tangential portion which has a preset angle with respect to the first tangential portion and abuts against the arc portion.
    Type: Application
    Filed: January 5, 2016
    Publication date: January 4, 2018
    Applicant: DAE KWANG METAL.CO.LTD
    Inventors: Hyeon Woo SEO, Won Beom CHANG