Patents by Inventor Yoshifumi Arakawa

Yoshifumi Arakawa 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 machining apparatus
    Patent number: 6894248
    Abstract: A laser beam machining apparatus includes a laser oscillator, a machining head which that machines a workpiece using the laser beam. An optical duct has an optical system to guide the laser beam from the laser oscillator to the machining head. Purge gas is supplied into the optical duct from a purge gas supply port, and the purge gas is output from a purge gas exhaust port. A detector detects presence of undesired gas in the optical duct.
    Type: Grant
    Filed: May 20, 2003
    Date of Patent: May 17, 2005
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yoshifumi Arakawa, Shigeru Yokoi
  • LASER BEAM MACHINING APPARATUS
    Publication number: 20050061778
    Abstract: A laser beam machining apparatus includes a laser oscillator, a machining head which that machines a workpiece using the laser beam. An optical duct has an optical system to guide the laser beam form the laser oscillator to the machining head. Purge gas is supplied into the optical duct from a purge gas supply port, and the purge gas is output from a purge gas exhaust port. A detector detects presence of undesired gas in the optical duct.
    Type: Application
    Filed: May 20, 2003
    Publication date: March 24, 2005
    Inventors: Yoshifumi Arakawa, Shigeru Yokoi