Patents by Inventor Fumikatsu Esaka

Fumikatsu Esaka 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).

  • Process and apparatus for welding workpieces with two or more laser beams whose spots are oscillated across welding direction
    Patent number: 5841097
    Abstract: Laser welding process and apparatus wherein a plurality of laser beams are focussed by a focussing device on surfaces of workpieces such that spots of the laser beams are located in the vicinity of an interface as viewed in a direction perpendicular to a direction of extension of an interface of the workpiece, and the beam spots and the workpieces are fed relative to each other by a feeding device in the direction of extension of the interface, while at the same time the beam spots are oscillated by an oscillating device at a predetermined frequency relative to the workpieces in a direction intersecting the direction of extension of the interface such that the beam spots are moved across the interface.
    Type: Grant
    Filed: December 23, 1996
    Date of Patent: November 24, 1998
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Fumikatsu Esaka, Toshiyuki Takasago, Eiji Nishi