Patents by Inventor Masahiro Kuwashiro

Masahiro Kuwashiro 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).

  • Steelmaking process
    Patent number: 4168968
    Abstract: A cold charge of steel scrap is melt cut and melted in an arc furnace provided with special oxygen-fuel burners by which rapid melting is promoted, the interior of the furnace being maintained under negative pressure by a fume evacuation and filtration means thereby to draw in secondary air from the outside atmosphere and, moreover, to increase the burner combustion efficiency. The arc furnace is provided with water cooling devices including a water-cooled ring, carbonaceous bricks, high-alumina ramming masses, and burner tiles in parts of the furnace wall and roof, particularly at wall parts where the burners are mounted, the wall above the slag line, and a roof part where an exhaust gas outlet is formed.
    Type: Grant
    Filed: June 28, 1977
    Date of Patent: September 25, 1979
    Assignee: Toshin Seiko Kabushiki Kaisha
    Inventors: Isao Udo, Tatsuya Kai, Masahiro Kuwashiro
  • Steelmaking apparatus
    Patent number: 4077614
    Abstract: A cold charge of steel scrap is melt cut and melted in an arc furnace provided with special oxygen-fuel burners by which rapid melting is promoted, the interior of the furnace being maintained under negative pressure by a fume evacuation and filtration means thereby to draw in secondary air from the outside atmosphere and, moreover, to increase the burner combustion efficiency. The arc furnace is provided with water cooling devices including a water-cooled ring, carbonaceous bricks, high-alumina ramming masses, and burner tiles in parts of the furnace wall and roof, particularly at wall parts where the burners are mounted, the wall above the slag line, and a roof part where an exhaust gas outlet is formed.
    Type: Grant
    Filed: November 10, 1976
    Date of Patent: March 7, 1978
    Assignee: Toshin Seiko Kabushiki Kaisha
    Inventors: Isao Udo, Tatsuya Kai, Masahiro Kuwashiro
  • Furnace for producing steel from scrap steel and the like
    Patent number: 3990686
    Abstract: A furnace for producing steel from steel scrap and the like is constructed in a manner such that the interior surface of the furnace wall upward from a level spaced apart by a predetermined distance from the surface of a slag layer formed on the molten steel is lined with carbonaceous bricks, and water-cooling means are provided in this part of the furnace wall.
    Type: Grant
    Filed: February 14, 1975
    Date of Patent: November 9, 1976
    Assignee: Toshin Seiko Kabushiki Kaisha
    Inventors: Mitsuya Iguchi, Masahiro Kuwashiro