Patents by Inventor Hendrik J. Van Der Does

Hendrik J. Van Der Does 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).

  • Treatment element and method for treating the inside of pipes
    Patent number: 5364473
    Abstract: A treatment element is provided for treating the inside of pipes, which element is bulged out by a medium flow presence in the pipe (1), while the movement of the element through the pipe can be controlled by a flexible pulling element. This treatment element (2) comprises a radially free compressible bag, the edge (5) of the open edge (6) of which is connected to the flexible pulling element (4). A wall pan (3) running in the peripheral direction of the bag is pressed against the inner wall of the pipe by the thrust of the medium, through which the inner wall is treated.
    Type: Grant
    Filed: February 25, 1993
    Date of Patent: November 15, 1994
    Assignee: Milieu Diensten Combinatie B.V.
    Inventor: Hendrik J. Van Der Does