Patents by Inventor Ikuno KUMAZAWA

Ikuno KUMAZAWA 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 of producing turbine blade
    Patent number: 8726504
    Abstract: The present invention relates to a method of producing turbine blade, which comprises, (a) forging a plurality of turbine blades in a state where the plurality of turbine blades are integrally connected in a longitudinal direction, (b) heat treating the plurality of turbine blades in the integrally connected state, (c) machining the plurality of turbine blades in the integrally connected state, and (d) separating the plurality of turbine blades into individual turbine blades. According to the method, the number of processes for the forging work can be decreased, and forging efficiency can be enhanced. Moreover, an amount of burr which occurs during the forging work can be reduced, and hence, a yield of material can be improved, as compared with a case where the turbine blade is forged as a single body.
    Type: Grant
    Filed: July 9, 2012
    Date of Patent: May 20, 2014
    Assignee: Daido Steel Co., Ltd.
    Inventors: Koji Kimura, Hiroshi Asano, Ikuno Kumazawa
  • METHOD OF PRODUCING TURBINE BLADE
    Publication number: 20130014388
    Abstract: The present invention relates to a method of producing turbine blade, which comprises, (a) forging a plurality of turbine blades in a state where the plurality of turbine blades are integrally connected in a longitudinal direction, (b) heat treating the plurality of turbine blades in the integrally connected state, (c) machining the plurality of turbine blades in the integrally connected state, and (d) separating the plurality of turbine blades into individual turbine blades. According to the method, the number of processes for the forging work can be decreased, and forging efficiency can be enhanced. Moreover, an amount of burr which occurs during the forging work can be reduced, and hence, a yield of material can be improved, as compared with a case where the turbine blade is forged as a single body.
    Type: Application
    Filed: July 9, 2012
    Publication date: January 17, 2013
    Applicants: MITSUBISHI HEAVY INDUSTRIES, LTD., DAIDO STEEL CO., LTD.
    Inventors: Koji KIMURA, Hiroshi ASANO, Ikuno KUMAZAWA