Patents Assigned to Sio-Societa per l'Industria Dell'Ossigenc e di Altri Gas
  • Method and device for welding protected metal parts
    Patent number: 4296300
    Abstract: A method and apparatus for welding or brazing of sheetmetal or plate covered with a temperature degradable protective coat, such as zinc or plastic. A cooling saddle supplied with liquid nitrogen is arranged on the side of the plate opposite that adjacent the welding torch. During the formation of the weld, gaseous nitrogen escapes through holes in the saddle to cool the protective coat and keep it from melting or volatilizing.
    Type: Grant
    Filed: December 19, 1978
    Date of Patent: October 20, 1981
    Assignee: Sio-Societa per l'Industria Dell'Ossigenc e di Altri Gas
    Inventor: Augusto Bottiglia