Patents by Inventor Masanobu HIRAYAMA

Masanobu HIRAYAMA 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 manufacturing a gear
    Patent number: 11148187
    Abstract: A method for manufacturing a gear which effectively prevent a crack from occurring inside a tooth part when rolling processing is performed on a teeth part of a gear raw material is achieved. A method according to one embodiment for manufacturing a gear by performing rolling processing on a tooth part of a sintered gear raw material. The method includes, when the rolling processing is performed on the tooth part of the gear raw material, pressing the gear raw material toward a center of rotation of the gear raw material by a rolling machine and, when at least the rolling processing is performed on the tooth part of the gear raw material toward a center of a thickness thereof by a pressing machine, pressing a region where an internal density of the tooth part of the gear raw material decreases.
    Type: Grant
    Filed: January 7, 2019
    Date of Patent: October 19, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masanobu Hirayama, Takahide Katagiri, Yugo Tsutsumi, Manabu Hirose, Yasuhiro Katsukawa
  • METHOD AND APPARATUS FOR MANUFACTURING GEAR
    Publication number: 20190262891
    Abstract: A method for manufacturing a gear which effectively prevent a crack from occurring inside a tooth part when rolling processing is performed on a teeth part of a gear raw material is achieved. A method according to one embodiment for manufacturing a gear by performing rolling processing on a tooth part of a sintered gear raw material. The method includes, when the rolling processing is performed on the tooth part of the gear raw material, pressing the gear raw material toward a center of rotation of the gear raw material by a rolling machine and, when at least the rolling processing is performed on the tooth part of the gear raw material toward a center of a thickness thereof by a pressing machine, pressing a region where an internal density of the tooth part of the gear raw material decreases.
    Type: Application
    Filed: January 7, 2019
    Publication date: August 29, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masanobu HIRAYAMA, Takahide KATAGIRI, Yugo TSUTSUMI, Manabu HIROSE, Yasuhiro KATSUKAWA