Patents by Inventor Takatoshi Tomoyasu

Takatoshi Tomoyasu 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).

  • Coated electrode for arc welding
    Patent number: 4367394
    Abstract: A coated electrode for arc welding, comprising a steel wire core having a flux coating therein, the flux consisting essentially of 6-24% of TiO.sub.2, 2-15% of MgO, 10-30% of SiO.sub.2, 5-15% of Mn, 1-6% of Al.sub.2 O.sub.3, 20-60% of iron powder, not more than 2.5% of iron oxide and 0.5-2.5% of an organic component and having a weight ratio of MgO/(TiO.sub.2 +Al.sub.2 O.sub.3) in the range of 0.15-0.7, and a binder for the flux.
    Type: Grant
    Filed: March 5, 1981
    Date of Patent: January 4, 1983
    Assignee: Kabushiki Kaisha Kobe Seiko Sho
    Inventors: Yoshiya Sakai, Shigeo Nagaoka, Yohji Nakai, Takatoshi Tomoyasu
  • Gas-shielded-type coated arc welding electrode
    Patent number: 4166879
    Abstract: This invention relates to a gas shielded-type coated arc welding electrode, more particularly to the coated electrode consisting of a mild steel core and coating material which comprises 20 - 40% organic material by weight of a total coating material, and 5 - 25% anhydrous sodium silicate by weight of said of organic material wherein the molar ratio of SiO.sub.2 /Na.sub.2 O within said of anhydrous sodium silicate is 2.5 - 3.5. Such an electrode displays improved coating material moisture resistance and usability.
    Type: Grant
    Filed: August 6, 1976
    Date of Patent: September 4, 1979
    Assignee: Kobe Steel, Ltd.
    Inventors: Kuniaki Hayashi, Takatoshi Tomoyasu