Patents by Inventor Akira Nishihira

Akira Nishihira 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).

  • Molten-metal transferring ladle and molten-metal tapping method
    Patent number: 7354547
    Abstract: A pressure tapping type ladle for transferring molten-metal includes a ladle body for containing molten metal, a top cover covering a top opening of the ladle body, and an openable working cover covering an opening formed in a part of the top cover. The ladle also includes a molten-metal tapping portion extending from a lower portion of the ladle body to above the ladle body, wherein the working cover is equipped with a cover body covering the opening of the top cover, a gas inlet formed in a top panel of the cover body, and a heat-resistant layer provided inside the cover body. The heat-resistant layer is comprised of a gas-permeable fireproof material layer, and gas for pressurizing inside the ladle body is introduced from the gas inlet via the gas-permeable fireproof layer.
    Type: Grant
    Filed: January 13, 2006
    Date of Patent: April 8, 2008
    Assignees: Nippon Crucible Co., Ltd., Daiki Aluminum Industry Co. Ltd.
    Inventors: Bunji Ukaji, Kenji Ogawa, Toshiyuki Matsumoto, Akira Nishihira, Katsuyoshi Mukai
  • Molten-metal transferring ladle and molten-metal tapping method
    Publication number: 20060119024
    Abstract: A pressure tapping type ladle for transferring molten-metal includes a ladle body for containing molten metal, a top cover covering a top opening of the ladle body, and an openable working cover covering an opening formed in a part of the top cover. The ladle also includes a molten-metal tapping portion extending from a lower portion of the ladle body to above the ladle body, wherein the working cover is equipped with a cover body covering the opening of the top cover, a gas inlet formed in a top panel of the cover body, and a heat-resistant layer provided inside the cover body. The heat-resistant layer is comprised of a gas-permeable fireproof material layer, and gas for pressurizing inside the ladle body is introduced from the gas inlet via the gas-permeable fireproof layer.
    Type: Application
    Filed: January 13, 2006
    Publication date: June 8, 2006
    Applicants: NIPPON CRUCIBLE CO., LTD., DAIKI ALUMINUM INDUSTRY CO., LTD.
    Inventors: Bunji Ukaji, Kenji Ogawa, Toshiyuki Matsumoto, Akira Nishihira, Katsuyoshi Mukai
  • Carbonaceous ceramic composite for use in contact with molten nonferrous metal
    Patent number: 5135893
    Abstract: This invention provides a carbon-containing ceramic composite for molten non-ferrous metal, the composite being a sintered ceramic body to be used in contact with molten non-ferrous metal, the sintered body containing an aggregate of silicon carbide and/or silicone nitride, the sintered body being characterized in that it comprises,(a) 100 parts by weight of the aggregate,(b) 5 to 45 parts by weight of flake graphite, and(c) boron carbide in an amount of 10 to 40% by weight based on the flake graphite.
    Type: Grant
    Filed: November 30, 1990
    Date of Patent: August 4, 1992
    Assignee: Osaka Gas Company Limited
    Inventors: Shoji Dohi, Akio Nakashiba, Kengo Hamada, Shigenobu Yurugi, Hiroshi Sano, Yoshitaka Hayashi, Akira Nishihira, Hirokazu Asada, Mineyoshi Nishinou, Mamoru Imajo