Patents by Inventor Yasunari Matsumura

Yasunari Matsumura 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).

  • Tuyere structure of melting furnace
    Patent number: 8480951
    Abstract: A tuyere structure of a melting furnace includes: a tuyere main body which is covered on an outer periphery thereof with a ring member baked in advance, and is disposed in a hole portion provided in a tuyere brick; and a ramming material which fills a periphery of the ring member so as to fix the ring member.
    Type: Grant
    Filed: August 27, 2008
    Date of Patent: July 9, 2013
    Assignee: Nippon Steel & Sumitomo Metal Corporation
    Inventors: Yasunari Matsumura, Kohji Taoka
  • Taphole structure of melting furnace and repair method thereof
    Patent number: 8236233
    Abstract: A taphole structure of a melting furnace includes: a sleeve made of a fire-resistant brick, which is disposed inside a tapping hole provided in a furnace wall brick; and a ramming material which fills a gap between the sleeve and the tapping hole for fixing the sleeve. In addition, a repair method of the taphole which has expanded due to wear of a first ramming material during tapping, includes: forming a dismantled surface having a straight line shape by dismantling and removing a worn portion of the first ramming material in a straight line from an outer surface side toward an inner surface side of a furnace wall; and then filling a second ramming material into a gap between the dismantled surface having the straight line shape and a first sleeve for sealing.
    Type: Grant
    Filed: September 3, 2008
    Date of Patent: August 7, 2012
    Assignee: Nippon Steel Corporation
    Inventors: Yasunari Matsumura, Kohji Taoka
  • TAPHOLE STRUCTURE OF MELTING FURNACE AND REPAIR METHOD THEREOF
    Publication number: 20100327498
    Abstract: A taphole structure of a melting furnace includes: a sleeve made of a fire-resistant brick, which is disposed inside a tapping hole provided in a furnace wall brick; and a ramming material which fills a gap between the sleeve and the tapping hole for fixing the sleeve. In addition, a repair method of the taphole which has expanded due to wear of a first ramming material during tapping, includes: forming a dismantled surface having a straight line shape by dismantling and removing a worn portion of the first ramming material in a straight line from an outer surface side toward an inner surface side of a furnace wall; and then filling a second ramming material into a gap between the dismantled surface having the straight line shape and a first sleeve for sealing.
    Type: Application
    Filed: September 3, 2008
    Publication date: December 30, 2010
    Inventors: Yasunari Matsumura, Kohji Taoka
  • TUYERE STRUCTURE OF MELTING FURNACE
    Publication number: 20100320653
    Abstract: A tuyere structure of a melting furnace includes: a tuyere main body which is covered on an outer periphery thereof with a ring member baked in advance, and is disposed in a hole portion provided in a tuyere brick; and a ramming material which fills a periphery of the ring member so as to fix the ring member.
    Type: Application
    Filed: August 27, 2008
    Publication date: December 23, 2010
    Inventors: Yasunari Matsumura, Kohji Taoka