Patents by Inventor Eberhard Dejmek

Eberhard Dejmek 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).

  • Device for internal welding of pipes or the like
    Patent number: 4500764
    Abstract: Apparatus for internal welding of pipes is provided with an external mechanism for rotating a pipe to be treated and a car insertable into the pipe and operable within the pipe. The car which carries a welding equipment is rigidly mounted to a central shaft which is freely pivotally mounted by means of bearings in two subframes each of which carries a number of tread rollers which can be locked against the inner surface of the pipe, so that the subframes during the operation are rotated together with the pipe whereas the car hangs downwardly within the pipe.
    Type: Grant
    Filed: August 9, 1983
    Date of Patent: February 19, 1985
    Assignee: VEB Gaskombinat Schwarze Pumpe
    Inventors: Erich Girodi, Gunter Bornowski, Eberhard Dejmek, Andreas Knabe, Roland Koch, Bernd Urbach, Arnold Weisselberg