Patents by Inventor Norihito HATA

Norihito HATA 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).

  • Reusability determination method for gear and reusability determination system for gear
    Patent number: 12007299
    Abstract: Provided is a reusability determination method for a gear that makes it possible to determine reusability of a gear during or after use to increase the reuse ratio. The reusability determination method for a gear of the present invention includes a step of measuring a content of retained ? phases in the gear, a step of calculating a change rate of the content of the retained ? phases, a step of measuring residual stress applied to the gear, a residual stress ratio calculation step of calculating a residual stress ratio to residual stress in an initial state of the gear, and a reusability determination step of determining whether or not the gear is reusable on the basis of results of the calculation in the retained ? phase change rate calculation step and the residual stress ratio calculation step.
    Type: Grant
    Filed: December 17, 2020
    Date of Patent: June 11, 2024
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Tomohisa Kanazawa, Mitsuhiro Yoshimoto, Norihito Hata, Masao Hayakawa, Susumu Meguro, Takanobu Hiroto, Yoshitaka Matsushita
  • Reusability Determination Method for Gear and Reusability Determination System for Gear
    Publication number: 20220326114
    Abstract: Provided is a reusability determination method for a gear that makes it possible to determine reusability of a gear during or after use to increase the reuse ratio. The reusability determination method for a gear of the present invention includes a step of measuring a content of retained ? phases in the gear, a step of calculating a change rate of the content of the retained ? phases, a step of measuring residual stress applied to the gear, a residual stress ratio calculation step of calculating a residual stress ratio to residual stress in an initial state of the gear, and a reusability determination step of determining whether or not the gear is reusable on the basis of results of the calculation in the retained ? phase change rate calculation step and the residual stress ratio calculation step.
    Type: Application
    Filed: December 17, 2020
    Publication date: October 13, 2022
    Inventors: Tomohisa KANAZAWA, Mitsuhiro YOSHIMOTO, Norihito HATA, Masao HAYAKAWA, Susumu MEGURO, Takanobu HIROTO, Yoshitaka MATSUSHITA