Patents Assigned to Shinto Kogyo Kabushiki Kaisha
  • Water jacket of arc furnace
    Patent number: 6563855
    Abstract: A metal-made water-cooling jacket for electric arc furnaces, characterized by comprising an Al diffusion layer having a thickness ranging from 200 to 800 &mgr;m, the Al concentration of the outermost surface of the Al diffusion layer being from 10 to 50 wt. %, formed on the surface of the metal by calorizing treatment.
    Type: Grant
    Filed: June 3, 2002
    Date of Patent: May 13, 2003
    Assignee: Shinto Kogyo Kabushiki Kaisha
    Inventors: Makoto Nishi, Masao Maesato, Tosirou Takami
  • Part or jig for gas carburizing furnace
    Patent number: 6231996
    Abstract: A part or jig of a metal for a gas carburizing furnace has an Al diffusion layer which has an Al content of 10 to 50 wt % in the surface portion of the part or jig, the Al diffusion layer being formed by carrying out the calorizing treatment.
    Type: Grant
    Filed: December 8, 1997
    Date of Patent: May 15, 2001
    Assignee: Shinto Kogyo Kabushiki Kaisha
    Inventors: Kenji Umeno, Tatsuya Oishi
  • Aluminum-diffusion coated steel pipe gating system
    Patent number: 4452296
    Abstract: An aluminum-diffusion coated steel pipe having an aluminum-coated layer on at least the inner surface of the steel pipe to be in contact with molten metal is used as a gating pipe system in a casting mold comprising a mold body and a gating system for pouring molten metal into the mold body. This aluminum-diffusion coated steel pipe can be further subjected to a secondary heat treatment in a high-temperature oxidizing atmosphere.
    Type: Grant
    Filed: July 26, 1982
    Date of Patent: June 5, 1984
    Assignees: Hitachi Kinzoku Kabushiki Kaisha, Shinto Kogyo Kabushiki Kaisha
    Inventors: Tomiaki Amano, Tetsuya Eda, Sunao Nishi, Shigeyoshi Shichiri, Takayuki Fukunaga