Patents by Inventor Keiji Ostuka

Keiji Ostuka 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).

  • Laser beam welding method and apparatus
    Publication number: 20040118818
    Abstract: While steel sheets are positioned and held by a holding mechanism, a first laser beam is applied to a heating region of the steel sheet to space the steel sheet from the other steel sheet by a predetermined distance. A second laser beam is applied to a welding region to weld the steel sheets. An amount of heat applied by the first laser beam, a moving speed of the first laser beam, and a focused spot diameter of the first laser beam are set to keep the sheet irradiated with the first laser beam in an unmelted state and plastically deform the sheet.
    Type: Application
    Filed: October 21, 2003
    Publication date: June 24, 2004
    Inventors: Koji Oda, Naoki Fukai, Jun Kitagawa, Junya Tanabe, Keiji Ostuka