Patents by Inventor Walter Quitmann

Walter Quitmann 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).

  • Pressure roll for jacketing steel pipes with thermoplastic strip
    Patent number: 4178200
    Abstract: A roll or roller for urging extruded thermoplastic strip onto an axially advancing, rotating pipe is constructed from a silicon rubber core with a shore hardness of 40 and having a softer silicon rubber jacket with a shore hardness not exceeding 30. The core is traversed by axial bores.
    Type: Grant
    Filed: March 9, 1978
    Date of Patent: December 11, 1979
    Assignee: Mannesmann Aktiengesellschaft
    Inventors: Karl-Heinz Hakert, Walter Quitmann
  • Wrapping of pipes or tubes
    Patent number: 3972761
    Abstract: A steel pipe with longitudinal welding seam is wrapped helically by means of a polyethylene ribbon which is normally stretched, but temporary stretch relief provides for a thicker envelope above and adjacent to the seam. A ribbon deflector roll and a pressure roll provide the stretching through a speed differential which is changed as stretch relief.
    Type: Grant
    Filed: February 3, 1975
    Date of Patent: August 3, 1976
    Assignee: Mannesmann Aktiengesellschaft
    Inventors: Helmut Landgraf, Walter Quitmann