Patents by Inventor Naoki Mabuchi

Naoki Mabuchi 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).

  • Patent number: 12358563
    Abstract: An automotive crashworthiness energy absorptive part absorbs crashworthiness energy by crushing axially when a crashworthiness load is input from a front side or a rear side of an automotive body, and includes: a tubular member formed of a steel sheet with a tensile strength of 590 MPa to 1180 MPa, the tubular member including a top portion and a pair of side wall portions continuous from both ends of the top portion via corner portions; a closed cross section space forming wall member formed of a steel sheet with a tensile strength lower than the tubular member, the closed cross section space forming wall member being disposed on an inner surface side of the tubular member and forming a closed cross section space between the closed cross section space forming wall member and at least the corner portion; and a resin provided in the closed cross section space.
    Type: Grant
    Filed: March 19, 2021
    Date of Patent: July 15, 2025
    Assignee: JFE STEEL CORPORATION
    Inventors: Kazuhiko Higai, Tsuyoshi Shiozaki, Yoshikiyo Tamai, Shigeaki Kitamura, Naoki Mabuchi
  • Patent number: 11975762
    Abstract: A crashworthiness energy absorption part includes: a tubular member having tensile strength of 590 to 1180 MPa grade; a closed cross section space forming wall part having tensile strength lower than the tubular member and having both edge portions joined to inner surfaces of a pair of side wall portions of the tubular member, and forming a closed cross section space between the closed cross section space forming wall part and a part of a peripheral wall portion of the tubular member; and a resin configured to fill the closed cross section space, includes a rubber-modified epoxy resin and a curing agent, and has tensile breaking elongation of 80% or more, adhesive strength to the tubular member and closed cross section space forming wall part of 12 MPa or higher, and a compression nominal stress of 6 MPa or higher at a compression nominal strain of 10%.
    Type: Grant
    Filed: December 12, 2019
    Date of Patent: May 7, 2024
    Assignee: JFE STEEL CORPORATION
    Inventors: Kazuhiko Higai, Tsuyoshi Shiozaki, Yoshikiyo Tamai, Shigeaki Kitamura, Naoki Mabuchi
  • Publication number: 20230219623
    Abstract: An automotive crashworthiness energy absorptive part absorbs crashworthiness energy by crushing axially when a crashworthiness load is input from a front side or a rear side of an automotive body, and includes: a tubular member formed of a steel sheet with a tensile strength of 590 MPa to 1180 MPa, the tubular member including a top portion and a pair of side wall portions continuous from both ends of the top portion via corner portions; a closed cross section space forming wall member formed of a steel sheet with a tensile strength lower than the tubular member, the closed cross section space forming wall member being disposed on an inner surface side of the tubular member and forming a closed cross section space between the closed cross section space forming wall member and at least the corner portion; and a resin provided in the closed cross section space.
    Type: Application
    Filed: March 19, 2021
    Publication date: July 13, 2023
    Applicant: JFE STEEL CORPORATION
    Inventors: Kazuhiko HIGAI, Tsuyoshi SHIOZAKI, Yoshikiyo TAMAI, Shigeaki KITAMURA, Naoki MABUCHI
  • Publication number: 20220089223
    Abstract: A crashworthiness energy absorption part includes: a tubular member having tensile strength of 590 to 1180 MPa grade; a closed cross section space forming wall part having tensile strength lower than the tubular member and having both edge portions joined to inner surfaces of a pair of side wall portions of the tubular member, and forming a closed cross section space between the closed cross section space forming wall part and a part of a peripheral wall portion of the tubular member; and a resin configured to fill the closed cross section space, includes a rubber-modified epoxy resin and a curing agent, and has tensile breaking elongation of 80% or more, adhesive strength to the tubular member and closed cross section space forming wall part of 12 MPa or higher, and a compression nominal stress of 6 MPa or higher at a compression nominal strain of 10%.
    Type: Application
    Filed: December 12, 2019
    Publication date: March 24, 2022
    Applicant: JFE STEEL CORPORATION
    Inventors: Kazuhiko HIGAI, Tsuyoshi SHIOZAKI, Yoshikiyo TAMAI, Shigeaki KITAMURA, Naoki MABUCHI
  • Patent number: 4542953
    Abstract: In a terminal stage for connecting a wire terminal thereto for use in an electrical apparatus comprising an electrically conductive terminal plate having at least two threaded holes at least two terminal screws to be screwed in the respective threaded holes, and an electrically insulating supporting member having a first wall portion substantially perpendicular to the terminal plate and for supporting the terminal plate, there are provided at least two movable members each being movable in the direction substantially perpendicular to the terminal plate and each having a first portion extending in the direction substantially parallel to the terminal plate and supporting the terminal screws, a second portion formed integrally with the first portion substantially perpendicularly to the terminal plate, and a third portion integrally formed with the second portion and extending in the direction substantially parallel to the terminal plate, each of the movable members being adapted to be stably held in at least one
    Type: Grant
    Filed: March 27, 1984
    Date of Patent: September 24, 1985
    Assignee: Idec Izumi Corporation
    Inventors: Kazumasa Iwamoto, Naoki Mabuchi, Junji Kawano