Patents Assigned to Kyoei Seiko Kabushiki Kaisha
  • Electric arc furnace for steel making, with no refractory bricks at the furnace wall
    Patent number: 4161620
    Abstract: An electric arc furnace for steel making includes a shell portion and a separate furnace bed portion made, the shell portion having a plurality of water-cooling boxes, instead of refractory bricks, along its inner circumferential surface, and the furnace bed portion being made slightly larger in outside diameter than the shell portion, the two portions being separably combined into a furnace.
    Type: Grant
    Filed: October 31, 1977
    Date of Patent: July 17, 1979
    Assignee: Kyoei Seiko Kabushiki Kaisha
    Inventor: Syoji Nakamura
  • Furnace roof for the electric arc furnace
    Patent number: 4152534
    Abstract: A furnace roof for an electric arc furnace which is divided into several blocks so that local damage, if any, of the furnace roof can be repaired easily by replacing a block which has been damaged with a new spare one, without taking down the whole furnace roof for repairs.
    Type: Grant
    Filed: December 9, 1977
    Date of Patent: May 1, 1979
    Assignee: Kyoei Seiko Kabushiki Kaisha
    Inventor: Kenji Iwashita