Patents by Inventor Yasumasa Nakashima

Yasumasa Nakashima 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).

  • Spot joining method and spot joining device
    Patent number: 6832713
    Abstract: A spot joining device comprises a joining tool, an induction motor for rotating the joining tool, a servo motor for vertically moving the joining tool along an axis of the joining tool, and a receiving member placed opposite to the joining tool. The joining tool includes a short-column shaped shoulder and a pin protruded downwardly along the axis from a central portion of a lower face of the shoulder at a tip end portion thereof. Two works such as aluminum alloy plates are lapped and placed on a receiving member. When the joining tool is rotated and moved downwardly, a joint spot of the works is heated and softened due to friction heat generated by the rotating pin. Thereby, plastic flow occurs in the vicinity of the joint spot. The vicinity of the joint spot is stirred and the works are fused at the joint spot. Thus, the works are spot-joined.
    Type: Grant
    Filed: May 2, 2001
    Date of Patent: December 21, 2004
    Assignee: Kawasaki Jukogyo Kabushiki Kaisha
    Inventors: Yuzo Kano, Masayuki Inuzuka, Seiichiro Yamashita, Yasumasa Nakashima, Yasuhide Nagao, Tomoyuki Iwashita
  • Spot joining method and spot joining device
    Publication number: 20010045447
    Abstract: A spot joining device comprises a joining tool, an induction motor for rotating the joining tool, a servo motor for vertically moving the joining tool along an axis of the joining tool, and a receiving member placed opposite to the joining tool. The joining tool includes a short-column shaped shoulder and a pin protruded downwardly along the axis from a central portion of a lower face of the shoulder at a tip end portion thereof. Two works such as aluminum alloy plates are lapped and placed on a receiving member. When the joining tool is rotated and moved downwardly, a joint spot of the works is heated and softened due to friction heat generated by the rotating pin. Thereby, plastic flow occurs in the vicinity of the joint spot. The vicinity of the joint spot is stirred and the works are fused at the joint spot. Thus, the works are spot-joined.
    Type: Application
    Filed: May 2, 2001
    Publication date: November 29, 2001
    Inventors: Yuzo Kano, Masayuki Inuzuka, Seiichiro Yamashita, Yasumasa Nakashima, Yasuhide Nagao, Tomoyuki Iwashita