Patents by Inventor Masayuki Watando

Masayuki Watando 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).

  • All position TIG welding process
    Patent number: 4366362
    Abstract: In a TIG welding process with controlled welding current pulses, DC current pulses with the frequency set at from tens to hundreds Hz (most preferably from 30 to 300 Hz) are fed to an electrode and current pulses are also fed to a filler wire so that an arc is caused to swing, whereby a large pool of molten metal can be maintained in a positive and stable manner due to the high arc pressure obtained when the welding current pulses at from tens to hundreds Hz is used.
    Type: Grant
    Filed: February 3, 1981
    Date of Patent: December 28, 1982
    Assignee: Ishikawajima-Harima Jukogyo Kabushiki Kaisha
    Inventors: Ichiro Ohta, Akio Tejima, Masayuki Watando, Akira Yamaoka, Kouzi Ishiwata, Minoru Yamada