Patents by Inventor Rumi Haruna

Rumi Haruna 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).

  • Method for regenerating gas turbine blade and gas turbine blade regenerating apparatus
    Patent number: 8876978
    Abstract: An object is to reduce changes in mechanical properties of a gas turbine blade base material during repair or regeneration of a gas turbine blade. For this purpose, a gas turbine blade after being operated is washed by being immersed into a strong alkaline washing solution, and the gas turbine blade after being washed with the strong alkaline washing solution is washed with water. The gas turbine blade after being washed with water is then washed by being immersed into a weak acid washing solution, and the gas turbine blade after being washed with the weak acid washing solution is subjected to heat treatment. The gas turbine blade after the heat treatment is then immersed into a strong acid washing solution, whereby the coating formed on the surface of the gas turbine blade is removed.
    Type: Grant
    Filed: February 14, 2008
    Date of Patent: November 4, 2014
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Tetsuji Kawakami, Ikumasa Koshiro, Rumi Haruna, Yoshitaka Uemura
  • METHOD FOR REGENERATING GAS TURBINE BLADE AND GAS TURBINE BLADE REGENERATING APPARATUS
    Publication number: 20100326466
    Abstract: An object is to reduce changes in mechanical properties of a gas turbine blade base material during repair or regeneration of a gas turbine blade. For this purpose, a gas turbine blade after being operated is washed by being immersed into a strong alkaline washing solution, and the gas turbine blade after being washed with the strong alkaline washing solution is washed with water. The gas turbine blade after being washed with water is then washed by being immersed into a weak acid washing solution, and the gas turbine blade after being washed with the weak acid washing solution is subjected to heat treatment. The gas turbine blade after the heat treatment is then immersed into a strong acid washing solution, whereby the coating formed on the surface of the gas turbine blade is removed.
    Type: Application
    Filed: February 14, 2008
    Publication date: December 30, 2010
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Tetsuji Kawakami, Ikumasa Koshiro, Rumi Haruna, Yoshitaka Uemura