Patents by Inventor Shigeaki Yamamoto

Shigeaki Yamamoto 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).

  • Shielded metal arc welding electrode for Cr-Mo low alloy steels
    Patent number: 4503129
    Abstract: A shielded arc welding electrode containing in a core wire or a covering flux thereof alloy elements in the proportions satisfying the following conditions. ##EQU1## in which B.sub.w is a coefficient of yield in deposited metal of a wire-originating element, B.sub.f is a coefficient of yield in the deposited metal of a flux-originating element, [elementary symbol (%)].sub.w is the percentage by weight of a component element of the core wire to the total weight thereof, [elementary symbol(%)].sub.f is the percentage by weight of a component element of the flux to the total weight thereof, and A.sub.f is the flux ratio (the weight ratio of the applied flux to the total weight of the welding electrode).
    Type: Grant
    Filed: September 3, 1982
    Date of Patent: March 5, 1985
    Assignee: Kabushiki Kaisha Kobe Seiko Sho
    Inventors: Naoki Okuda, Akihiko Usui, Shigeaki Yamamoto, Shogo Natsume