Patents Assigned to Rudolf Harmstorf
  • Method and an apparatus for moving a rope- or cable-like element through a cable channel pipe
    Patent number: 4941774
    Abstract: A method for introducing and moving a rope- or cable-like element in and through a cable channel pipe filled with water wherein a flow of water is pumped through the cable channel pipe, and the element is floated through the cable channel pipe jointly with the water flow.
    Type: Grant
    Filed: October 15, 1987
    Date of Patent: July 17, 1990
    Assignee: Rudolf Harmstorf
    Inventor: Rudolf Harmstorf