Patents by Inventor Hiroshi Saita

Hiroshi Saita 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).

  • Flux for overlay welding
    Patent number: 4436563
    Abstract: A flux for overlay welding, essentially containing by weight 30-70% of CaF.sub.2, 10-30% of Al.sub.2 O.sub.3, 1-15% of CaO, 5-25% of SiO.sub.2 and 5-25% of MgO such that the total amount of CaF.sub.2, Al.sub.2 O.sub.3, CaO, SiO.sub.2 and MgO is greater than 70%, while satisfying the conditions of MgO/(Al.sub.2 O.sub.3 +SiO.sub.2).gtoreq.0.20, MgO/SiO.sub.2 .ltoreq.2.0 and MgO/Al.sub.2 O.sub.3 .ltoreq.2.0.
    Type: Grant
    Filed: July 21, 1982
    Date of Patent: March 13, 1984
    Assignee: Kabushiki Kaisha Kobe Seiko Sho
    Inventors: Osamu Tanaka, Kazuhiro Takeba, Hiroshi Saita, Yukinobu Matsushita, Koji Koyabu
  • Coated welding electrode containing chromium
    Patent number: 4131784
    Abstract: The present invention relates to a coated welding electrode containing at least 0.5% of Cr based on the total weight of the welding electrode and comprising a metal core and a coating flux composition. In this welding electrode, the content of Na and K components in the coating flux calculated as (Na.sub.2 O + K.sub.2 O) is reduced below 1% based on the total weight of the coating flux composition, whereby amounts of fumes generated at the welding step, especially the amount of toxic soluble Cr, are suppressed and minimized.
    Type: Grant
    Filed: March 23, 1977
    Date of Patent: December 26, 1978
    Assignee: Kobe Steel, Ltd.
    Inventors: Shinji Kimura, Tomokazu Godai, Shoji Minato, Minoru Kobayashi, Makoto Yamaga, Shingo Maki, Yoshizo Hashimoto, Tetsuo Suga, Hiroshi Saita