Patents by Inventor Ryosuke HIRAISHI

Ryosuke HIRAISHI 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).

  • Heat treatment method and assembly method for fitted component
    Patent number: 11000924
    Abstract: A heat treatment method is provided in which a first steel component (11) formed with a coating (111) thereon is fitted in first holes (123, 124) of a second steel component (12) subjected to a quenching treatment. The heat treatment method includes a heating step of heating the second steel component to a first temperature (T1) equal to or higher than a tempering temperature (T0) of the second steel component and higher than a temperature of the first steel component by a temperature difference (?T) for achieving shrink fitting and a shrink-fitting step of shrink-fitting the first steel component in the first holes of the second steel component in a state of maintaining the temperature difference for achieving shrink fitting between the first steel component and the second steel component.
    Type: Grant
    Filed: March 6, 2020
    Date of Patent: May 11, 2021
    Assignee: NISSAN MOTOR CO., LTD.
    Inventors: Tsuyoshi Sugimoto, Ryosuke Hiraishi, Kenji Yasui, Yukichi Okayama, Kei Tanaka, Takeshi Oshio
  • HEAT TREATMENT METHOD AND ASSEMBLY METHOD FOR FITTED COMPONENT
    Publication number: 20200206850
    Abstract: A heat treatment method is provided in which a first steel component (11) formed with a coating (111) thereon is fitted in first holes (123, 124) of a second steel component (12) subjected to a quenching treatment. The heat treatment method includes a heating step of heating the second steel component to a first temperature (T1) equal to or higher than a tempering temperature (T0) of the second steel component and higher than a temperature of the first steel component by a temperature difference (?T) for achieving shrink fitting and a shrink-fitting step of shrink-fitting the first steel component in the first holes of the second steel component in a state of maintaining the temperature difference for achieving shrink fitting between the first steel component and the second steel component.
    Type: Application
    Filed: March 6, 2020
    Publication date: July 2, 2020
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Tsuyoshi Sugimoto, Ryosuke Hiraishi, Kenji Yasui, Yukichi Okayama, Kei Tanaka, Takeshi Oshio
  • HEAT TREATMENT METHOD AND ASSEMBLY METHOD FOR FITTED COMPONENT
    Publication number: 20190255665
    Abstract: A heat treatment method is provided in which a first steel component (11) formed with a coating (111) thereon is fitted in first holes (123, 124) of a second steel component (12) subjected to a quenching treatment. The heat treatment method includes a heating step of heating the second steel component to a first temperature (T1) equal to or higher than a tempering temperature (T0) of the second steel component and higher than a temperature of the first steel component by a temperature difference (?T) for achieving shrink fitting and a shrink-fitting step of shrink-fitting the first steel component in the first holes of the second steel component in a state of maintaining the temperature difference for achieving shrink fitting between the first steel component and the second steel component.
    Type: Application
    Filed: September 16, 2016
    Publication date: August 22, 2019
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Tsuyoshi SUGIMOTO, Ryosuke HIRAISHI, Kenji YASUI, Yukichi OKAYAMA, Kei TANAKA, Takeshi OSHIO