Patents by Inventor Kazuna TSUZUKI

Kazuna TSUZUKI 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).

  • Wheel disc manufacturing method and wheel disc
    Patent number: 11186119
    Abstract: A manufacturing method for a wheel disc, includes forming a flange portion, wherein the flange portion is formed such that an inner mold and an outer mold having a cylindrical inner surface with a first inside radius larger than the first outside radius and placed above the inner mold coaxially to the inner mold are brought close relative to each other in an axial direction by one stroke so that the outer edge of the disc material is bent downward, and the cylindrical inner surface of the outer mold is provided with recessed portions hollowed outwardly in a wheel radial direction, the recessed portions being formed in ranges corresponding to the window portions in the wheel circumferential direction and in a range from a middle position to a bottom end in the wheel axial direction.
    Type: Grant
    Filed: December 16, 2020
    Date of Patent: November 30, 2021
    Assignee: CENTRAL MOTOR WHEEL CO., LTD.
    Inventors: Kazuna Tsuzuki, Shinji Yamada
  • WHEEL DISC MANUFACTURING METHOD AND WHEEL DISC
    Publication number: 20210101405
    Abstract: A manufacturing method for a wheel disc, includes forming a flange portion, wherein the flange portion is formed such that an inner mold and an outer mold having a cylindrical inner surface with a first inside radius larger than the first outside radius and placed above the inner mold coaxially to the inner mold are brought close relative to each other in an axial direction by one stroke so that the outer edge of the disc material is bent downward, and the cylindrical inner surface of the outer mold is provided with recessed portions hollowed outwardly in a wheel radial direction, the recessed portions being formed in ranges corresponding to the window portions in the wheel circumferential direction and in a range from a middle position to a bottom end in the wheel axial direction.
    Type: Application
    Filed: December 16, 2020
    Publication date: April 8, 2021
    Applicant: CENTRAL MOTOR WHEEL CO., LTD.
    Inventors: Kazuna TSUZUKI, Shinji YAMADA
  • Wheel disc manufacturing method and wheel disc
    Patent number: 10913308
    Abstract: A manufacturing method for a wheel disc, includes forming a flange portion, wherein the flange portion is formed such that an inner mold and an outer mold having a cylindrical inner surface with a first inside radius larger than the first outside radius and placed above the inner mold coaxially to the inner mold are brought close relative to each other in an axial direction by one stroke so that the outer edge of the disc material is bent downward, and the cylindrical inner surface of the outer mold is provided with recessed portions hollowed outwardly in a wheel radial direction, the recessed portions being formed in ranges corresponding to the window portions in the wheel circumferential direction and in a range from a middle position to a bottom end in the wheel axial direction.
    Type: Grant
    Filed: November 17, 2015
    Date of Patent: February 9, 2021
    Assignee: CENTRAL MOTOR WHEEL CO., LTD.
    Inventors: Kazuna Tsuzuki, Shinji Yamada
  • WHEEL DISC MANUFACTURING METHOD AND WHEEL DISC
    Publication number: 20190143746
    Abstract: A manufacturing method for a wheel disc, includes forming a flange portion, wherein the flange portion is formed such that an inner mold and an outer mold having a cylindrical inner surface with a first inside radius larger than the first outside radius and placed above the inner mold coaxially to the inner mold are brought close relative to each other in an axial direction by one stroke so that the outer edge of the disc material is bent downward, and the cylindrical inner surface of the outer mold is provided with recessed portions hollowed outwardly in a wheel radial direction, the recessed portions being formed in ranges corresponding to the window portions in the wheel circumferential direction and in a range from a middle position to a bottom end in the wheel axial direction.
    Type: Application
    Filed: November 17, 2015
    Publication date: May 16, 2019
    Applicant: CENTRAL MOTOR WHEEL CO., LTD.
    Inventors: Kazuna TSUZUKI, Shinji YAMADA