Patents Assigned to Hans-Ernst Sachse
  • Guiding mandrin for drainage ducts
    Patent number: 4713058
    Abstract: Guiding mandrin for drainage ducts featuring a wedge that by being pushed in or pulled out of the split tip of the mandrin tube will cause said tip to increase or reduce its diameter according to requirement. Hereby, a firm contact between guiding mandrin and drainage duct can be established which will significantly facilitate the handling of the drainage duct.
    Type: Grant
    Filed: March 27, 1986
    Date of Patent: December 15, 1987
    Assignee: Hans-Ernst Sachse
    Inventor: Hans-Ernst Sachse