Patents by Inventor Yutaka Nishikawa

Yutaka Nishikawa 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).

  • Patent number: 4764224
    Abstract: A baked flux of high basicity for submerged arc welding which has a chemical composition suitable for use in universal combination with various types of welding wires in welding low alloying steels. The baked flux reduces the oxygen content and diffusible hydrogen content of the weld metal to form a weld metal having a high toughness, enables forming regular beads without causing weld defects such as lack of fusion and slag inclusion, and facilitates welding work. The performance of baked fluxes is described in comparison with that of the conventional baked fluxes.
    Type: Grant
    Filed: July 1, 1987
    Date of Patent: August 16, 1988
    Assignee: Kabushiki Kaisha Kobe Seiko Sho
    Inventors: Naoki Okuda, Yutaka Nishikawa, Takakiyo Aoki
  • Patent number: 4336441
    Abstract: A welding method for welding a base metal with a welding wire of specified alloy composition using a TIG welding process, automatically controlling an arc length between a nonconsumable electrode and the base metal, deflecting the arc forward in the welding advance direction by the influence of magnetic fields resulting from DC current flow through the welding wire to prevent arc blow, weaving the arc forward in the welding advance direction by pulsating the current flowing through the weld wire, and heat treating a final weld layer with the nonconsumable electrode.
    Type: Grant
    Filed: October 15, 1979
    Date of Patent: June 22, 1982
    Assignee: Kobe Steel, Ltd.
    Inventors: Tomokazu Godai, Tohru Sugiyama, Yutaka Nishikawa