Patents by Inventor Takao Nakagaki

Takao Nakagaki 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).

  • Steam turbine plant
    Patent number: 7278267
    Abstract: A steam turbine plant partially utilizes a hydrocarbon fuel such as an LNG as a fuel to improve the efficiency of the plant. A steam turbine plant includes a boiler, a steam turbine, a feedwater system, and a superheating combustor. The boiler generates steam, and the steam turbine is driven by the steam generated in the boiler. The feedwater system recovers the steam exhausted from the steam turbine and supplies the steam to the boiler as a feedwater. The superheating combustor is provided between the boiler and the steam turbine, wherein fuel originated from hydrocarbon fuel and oxidizer are mixed with the steam generated in the boiler and combusted in the superheating combustor to increase the temperature of the steam.
    Type: Grant
    Filed: February 23, 2005
    Date of Patent: October 9, 2007
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masahiko Yamada, Katsuya Yamashita, Koichi Goto, Takao Nakagaki
  • Steam turbine plant
    Publication number: 20050229603
    Abstract: A steam turbine plant partially utilizes a hydrocarbon fuel such as an LNG as a fuel to improve the efficiency of the plant. A steam turbine plant includes a boiler, a steam turbine, a feedwater system, and a superheating combustor. The boiler generates steam, and the steam turbine is driven by the steam generated in the boiler. The feedwater system recovers the steam exhausted from the steam turbine and supplies the steam to the boiler as a feedwater. The superheating combustor is provided between the boiler and the steam turbine, wherein fuel originated from hydrocarbon fuel and oxidizer are mixed with the steam generated in the boiler and combusted in the superheating combustor to increase the temperature of the steam.
    Type: Application
    Filed: February 23, 2005
    Publication date: October 20, 2005
    Inventors: Masahiko Yamada, Katsuya Yamashita, Koichi Goto, Takao Nakagaki
  • Fuel cell containing a fuel supply means, gas generating means and temperature control means operated to prevent the deposition of carbon
    Patent number: 6099983
    Abstract: A fuel cell includes: a fuel supplying portion for supplying a fuel which is reformed at a temperature below 450.degree. C.; a gas generating portion for reforming the supplied fuel to generate a hydrogen containing gas; a temperature control portion for rapidly raising the temperature of the reformed hydrogen containing gas from 450.degree. C. to 600.degree. C. to supply the hydrogen containing gas while maintaining the temperature thereof; and a power generating portion for allowing the temperature controlled fuel to react with a separately supplied oxidizer to generate electricity. The power generating portion comprises at least a fuel electrode, to which the fuel temperature-controlled by the temperature control portion is supplied, and an oxidizer electrode, which is provided so as to face the fuel electrode via an electrolyte layer 6. A plurality of single cells with this construction may be laminated to form a laminated body 12.
    Type: Grant
    Filed: October 17, 1997
    Date of Patent: August 8, 2000
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takao Nakagaki, Takashi Ogawa, Michio Hori, Toshiaki Hayashi, Takehito Nishida