Patents by Inventor Yeong Do Park

Yeong Do Park 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).

  • SPOT WELDING METHOD FOR HIGH STRENGTH STEEL SHEET
    Publication number: 20150174688
    Abstract: A spot welding method for a high strength steel sheet is provided. The method includes a first pulse step for applying electric current of about 8 to 9 kA about 1 to 3 cy and a first cooling step for cooling for about 1 to 3 cy. In addition, the method includes a second pulse step for applying electric current less than the electric current applied in the first pulse step and a second cooling step for cooling for about 1 to 3 cy. A third pulse step includes applying electric current greater than the electric current applied in the second pulse step.
    Type: Application
    Filed: August 5, 2014
    Publication date: June 25, 2015
    Inventors: Ji Hong Yoo, Seung Hyun Hong, Yeong Do Park, Jae Won Kim