Patents by Inventor Chon-Liang Tsai

Chon-Liang Tsai 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 and apparatus for underwater submerged arc welding
    Patent number: 4069408
    Abstract: According to the method and apparatus of this invention, water is kept away from the arc in underwater arc welding by means of material contained in a water-tight enclosure. The water-tight enclosure is formed by pressing the seal at the bottom of the enclosure against the object to be welded and by closing the opening for the electrode on top of the enclosure by using the fluid nature of a viscous polymer. Gas generated in the enclosure during welding is expelled through check valves located along two longitudinal sides of the enclosure.The enclosure is prepared above the water surface and then delivered to the welding site. No inert gas is needed.
    Type: Grant
    Filed: June 7, 1976
    Date of Patent: January 17, 1978
    Assignee: Massachusetts Institute of Technology
    Inventors: Koichi Masubuchi, Chon-Liang Tsai