Patents by Inventor Hass Bertil

Hass Bertil 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).

  • Electrical resistance welding apparatus
    Patent number: 4356373
    Abstract: A welding gun for electrical resistance welding has an electrode holder arm (1,2,3) made as a shell construction. The current supply to the stationary electrode (5) as well as the coolant supply to and returning from the electrode is effected with the aid of two copper tubes (14) which run parallel to each other inside the arm. The interior cavity of the arm is filled with foamed plastics (20).
    Type: Grant
    Filed: March 21, 1980
    Date of Patent: October 26, 1982
    Assignee: AB Volvo
    Inventors: Karl E. Mattson, Hass Bertil