Patents by Inventor Hans Schalch

Hans Schalch 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).

  • Method and apparatus for making a water-tight radiator element
    Patent number: 4580715
    Abstract: The open ends of a flat tube are closed by rolling together the edge portions of the wide, opposing sidewalls of the tube by means of two flanging rolls successively guided over these edge portions in opposite directions. One of the flanging rolls makes a longer pass than the other. The edge portions thus rolled closed are then welded to one another in a semi- or fully-automatic TIG process. The result is a clean, symmetrically shaped radiator element.
    Type: Grant
    Filed: December 2, 1983
    Date of Patent: April 8, 1986
    Assignee: Neotech Holding AG.
    Inventor: Hans Schalch