Patents by Inventor Masayasu MINATANI

Masayasu MINATANI 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).

  • Stir pin, friction stir welding tool, and machine tool
    Patent number: 11938559
    Abstract: A stir pin includes a base end portion configured to be held rotatably about a first axis, a stirring portion provided to project from a shoulder member to be rotatable about the first axis together with the base end portion, and an intermediate portion including a second portion connected to the stirring portion to be rotatable about the first axis together with the stirring portion and having a second diameter passing through the first axis, and a first portion provided between and connected to the base end portion and the second portion to be rotatable about the first axis together with the base end portion and the second portion. The first portion has an end surface to which the second portion is connected and which has a maximum diameter larger than the second diameter. The end surface has a ring-shaped receiving surface configured to receive a material waste.
    Type: Grant
    Filed: March 31, 2022
    Date of Patent: March 26, 2024
    Assignee: YAMAZAKI MAZAK CORPORATION
    Inventors: Seigo Ouchi, Eiji Matsubara, Masayasu Minatani, Toru Murakami
  • STIR PIN, FRICTION STIR WELDING TOOL, AND MACHINE TOOL
    Publication number: 20220226928
    Abstract: A stir pin includes a base end portion configured to be held rotatably about a first axis, a stirring portion provided to project from a shoulder member to be rotatable about the first axis together with the base end portion, and an intermediate portion including a second portion connected to the stirring portion to be rotatable about the first axis together with the stirring portion and having a second diameter passing through the first axis, and a first portion provided between and connected to the base end portion and the second portion to be rotatable about the first axis together with the base end portion and the second portion. The first portion has an end surface to which the second portion is connected and which has a maximum diameter larger than the second diameter. The end surface has a ring-shaped receiving surface configured to receive a material waste.
    Type: Application
    Filed: March 31, 2022
    Publication date: July 21, 2022
    Applicant: Yamazaki Mazak Corporation
    Inventors: Seigo OUCHI, Eiji MATSUBARA, Masayasu MINATANI, Toru MURAKAMI