Patents by Inventor Kunpei Ito

Kunpei Ito 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).

  • Pierce metal for joining different materials and method of joining different materials using pierce metal
    Patent number: 11407056
    Abstract: A pierce metal includes a head and a shaft. The shaft is configured to penetrate through an aluminum die-cast member with a protruded tip surface of the shaft being exposed from the aluminum die-cast member, and an outer peripheral surface of the shaft is configured to come into contact with a through-hole of the aluminum die-cast member, upon joining the aluminum die-cast member and the iron-based member together. The head and the iron-based member in contact with the protruded tip surface are configured to be held under pressure and applied with electric power by weld electrodes to perform spot welding of the protruded tip surface and the iron-based member, upon joining the aluminum die-cast member and the iron-based member together. The outer peripheral surface includes a non-contact part configured to come into non-contact with the through-hole in a state in which the shaft is penetrated through the aluminum die-cast member.
    Type: Grant
    Filed: April 1, 2020
    Date of Patent: August 9, 2022
    Assignee: SUBARU CORPORATION
    Inventors: Tatsunori Matsunaga, Takashi Iizuka, Seigo Shimizu, Kunpei Ito, Yugo Tomita
  • PIERCE METAL FOR JOINING DIFFERENT MATERIALS AND METHOD OF JOINING DIFFERENT MATERIALS USING PIERCE METAL
    Publication number: 20200361022
    Abstract: A pierce metal includes a head and a shaft. The shaft is configured to penetrate through an aluminum die-cast member with a protruded tip surface of the shaft being exposed from the aluminum die-cast member, and an outer peripheral surface of the shaft is configured to come into contact with a through-hole of the aluminum die-cast member, upon joining the aluminum die-cast member and the iron-based member together. The head and the iron-based member in contact with the protruded tip surface are configured to be held under pressure and applied with electric power by weld electrodes to perform spot welding of the protruded tip surface and the iron-based member, upon joining the aluminum die-cast member and the iron-based member together. The outer peripheral surface includes a non-contact part configured to come into non-contact with the through-hole in a state in which the shaft is penetrated through the aluminum die-cast member.
    Type: Application
    Filed: April 1, 2020
    Publication date: November 19, 2020
    Inventors: Tatsunori MATSUNAGA, Takashi Iizuka, Seigo Shimizu, Kunpei Ito, Yugo Tomita