Patents by Inventor Harushige Tamura

Harushige Tamura 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).

  • Multi-stage combustion method for inhibiting formation of nitrogen oxides
    Patent number: 4496306
    Abstract: A method comprising injecting a primary fuel and air into a furnace to burn the fuel and form a first-stage combustion zone, the air being supplied at a rate in excess of the stoichiometric rate required for the combustion of the fuel, and injecting a secondary fuel into the furnace around or downstream of the first-stage zone at a rate approximately equal to the stoichiometric rate required for the consumption of the excess oxygen resulting from the combustion in the first-stage zone the fuel being diluted with the surrounding combustion gas and to form a second-stage combustion zone around or downstream of the first-stage zone.
    Type: Grant
    Filed: April 18, 1984
    Date of Patent: January 29, 1985
    Assignee: Hitachi Shipbuilding & Engineering Co., Ltd.
    Inventors: Noboru Okigami, Hiroshi Hayasaka, Yoshitoshi Sekiguchi, Harushige Tamura
  • Multi-stage combustion method for inhibiting formation of nitrogen oxides
    Patent number: 4395223
    Abstract: A method comprising injecting a primary fuel and air into a furnace to burn the fuel and form a first-stage combustion zone, the fuel being diluted with surrounding combustion gas and the air being supplied at a rate in excess of the stoichiometric rate required for the combustion of the fuel, and injecting a secondary fuel into the furnace around or downstream of the first-stage zone at a range approximately equal to the stoichiometric rate required for the consumption of the excess oxygen resulting from the combustion in the first-stage zone the fuel being diluted with surrounding combustion gas and to form a second-stage combustion zone around or downstream of the first-stage zone.
    Type: Grant
    Filed: December 31, 1980
    Date of Patent: July 26, 1983
    Assignee: Hitachi Shipbuilding & Engineering Co., Ltd.
    Inventors: Noboru Okigami, Hiroshi Hayasaka, Yoshitoshi Sekiguchi, Harushige Tamura