Patents Assigned to Yamamoto Rock Machine Co. Ltd.
  • Piercing apparatus
    Patent number: 6698532
    Abstract: A piercing apparatus compact in size having a decreased number of hoses is suited for use as an iron runner port-opening machine for a blast furnace or the like furnace in an iron mill.
    Type: Grant
    Filed: March 5, 2003
    Date of Patent: March 2, 2004
    Assignees: Nippon Steel Corporation, Yamamoto Rock Machine Co., Ltd., Nittetsu Plant Designing Corporation
    Inventors: Manabu Gotou, Keisuke Morimitsu, Hiromi Kawakami, Tuneo Iwasaki, Kazuo Haga, Yoshiichi Yatagai, Manpei Hontani, Hiroyuki Takao
  • Piercing apparatus
    Patent number: 6601655
    Abstract: A piercing apparatus compact in size having a decreased number of hoses is suited for use as an iron runner port-opening machine for a blast furnace or the like furnace in an iron mill.
    Type: Grant
    Filed: May 9, 2000
    Date of Patent: August 5, 2003
    Assignees: Nippon Steel Corporation, Yamamoto Rock Machine Co. Ltd., Nittetsu Plant Designing Corporation
    Inventors: Manabu Gotou, Keisuke Morimitsu, Hiromi Kawakami, Tuneo Iwasaki, Kazuo Haga, Yoshiichi Yatagai, Manpei Hontani, Hiroyuki Takao