Patents by Inventor Tomotaka Nagase

Tomotaka Nagase 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 lap welding process of welding together overlapped plated steel sheets
    Patent number: 6528756
    Abstract: Prior to welding together two overlapped plated steel sheets 4 and 5 by laser lap welding that irradiates parts of the plated steel sheets (4, 5) extending on a weld line (Lw), slits (4b) are formed intermittently in the upper plated steel sheet (4) with a laser beam (L). Subsequently, a welding head (1) is moved along the weld line (Lw) while the upper plated steel sheet (4) is pressed against the lower plated steel sheet (5) by pressure rollers. Parts of the upper plated steel sheet (4) extending on the weld line (Lw) and not provided with the slits (4b) are irradiated with the laser beam to laser-weld the plated steel sheets (4, 5) together. A vapor of the component of the coating layers coating the joining surfaces (4a, 5a) of the plated steel sheets (4, 5) produced from the coating layers by the heat produced by the laser beam is discharged through the slits (4b).
    Type: Grant
    Filed: March 29, 2001
    Date of Patent: March 4, 2003
    Assignee: Fuji Jukogyo Kabushiki Kaisha
    Inventors: Hidetaka Degawa, Shoji Kojima, Tomotaka Nagase, Hiroki Saito, Kazuyuki Hoshino, Satoshi Ueda, Koji Tomita, Kosuke Kawai, Hiroshi Shimazaki
  • Laser lap welding process of welding together overlapped plated steel sheets
    Publication number: 20010047983
    Abstract: Prior to welding together two overlapped plated steel sheets 4 and 5 by laser lap welding that irradiates parts of the plated steel sheets (4, 5) extending on a weld line (Lw), slits (4b) are formed intermittently in the upper plated steel sheet (4) with a laser beam (L). Subsequently, a welding head (1) is moved along the weld line (Lw) while the upper plated steel sheet (4) is pressed against the lower plated steel sheet (5) by pressure rollers. Parts of the upper plated steel sheet (4) extending on the weld line (Lw) and not provided with the slits (4b) are irradiated with the laser beam to laser-weld the plated steel sheets (4, 5) together. A vapor of the component of the coating layers coating the joining surfaces (4a, 5a) of the plated steel sheets (4, 5) produced from the coating layers by the heat produced by the laser beam is discharged through the slits (4b).
    Type: Application
    Filed: March 29, 2001
    Publication date: December 6, 2001
    Inventors: Hidetaka Degawa, Shoji Kojima, Tomotaka Nagase, Hiroki Saito, Kazuyuki Hoshino, Satoshi Ueda, Koji Tomita, Kosuke Kawai, Hiroshi Shimazaki