Patents by Inventor Kazutoshi Itoo

Kazutoshi Itoo 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).

  • Turbine generator and operating method thereof, and nuclear power plant and operating method thereof
    Patent number: 6459750
    Abstract: A turbine generator has a water cooling system for cooling the inside of a stator coil with water, wherein the water cooling system includes a water storage tank for storing water; pipes connecting the water storage tank and the stator coil, the pipes being provided in an inlet side and in an outlet side; a decarbonated air injection unit connected to the inlet side of the pipe by a pipe or a decarbonated air injection unit connected to the water storage tank; a heater for heating the water, the stator coil having an oxide film on a surface in contact with the water, the oxide film being formed before starting operation of the generator by high temperature water injected with the decarbonated air and heated by the heater; and a control unit for effecting control so that the decarbonated air is always and continuously injected into the cooling water during operation of the generator.
    Type: Grant
    Filed: June 2, 2000
    Date of Patent: October 1, 2002
    Assignee: Hitachi, Ltd.
    Inventors: Kazutoshi Itoo, Kenya Ohashi, Kazumi Fujii, Takahiko Sano