Patents by Inventor Ju Menzel

Ju Menzel 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).

  • Apparatus for and a method of electrochemically polishing pipe inside surfaces
    Patent number: 4772367
    Abstract: An apparatus and a method serving for electrochemically polishing and/or pickling the inner surfaces (16) of pipes (10) provide for a polishing head (12) to be moved through the pipe. The polishing head (12) comprises a dielectric outer wall which defines a narrow working gap (28) together with the inner pipe surface (16) to be cleaned, the electrolyte flowing through said gap. This permits electrochemical polishing of high quality of the inside surface of the pipe with little consumption of electrolyte. The electrolyte stream may be divided into cathodic and anodic partial streams (30 and 32, respectively).
    Type: Grant
    Filed: May 8, 1987
    Date of Patent: September 20, 1988
    Assignee: Poligrat GmbH
    Inventors: Ju Menzel, Georg Henkel