Patents by Inventor Wataru Shimdada

Wataru Shimdada 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).

  • Welding apparatus
    Patent number: 4162389
    Abstract: In a welding apparatus for overlaying on a base metal, a reverse polarity soft plasma arc is formed between an electrode and the base metal and a welding rod is fed into the arc to weld the base metal by melting the welding rod and the feeding speed of the welding rod is controlled corresponding to the arc current to form a bead having low penetration.The electrode is oscillated and an active gas such as CO.sub.2 or O.sub.2 is incorporated in a shield gas at a rate controlled corresponding to the oscillation of the electrode.
    Type: Grant
    Filed: April 29, 1977
    Date of Patent: July 24, 1979
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Wataru Shimdada, Kazumichi Machida, Susumu Hoshinouchi, Seigo Hiramoto, Masaru Okada