Patents by Inventor Edgar Graupner

Edgar Graupner 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).

  • Flat ring packing
    Patent number: 6290237
    Abstract: A flat ring packing to be placed between two flanges comprises two packing layers of packing material and an intermediate ring of metal, which is disposed between the two packing layers and has a common central longitudinal axis therewith. Each packing layer is fixed on the intermediate ring substantially without play radial and parallel to the axis by means of a connection.
    Type: Grant
    Filed: July 19, 1999
    Date of Patent: September 18, 2001
    Assignee: IDT Industrie-und Dichtungstechnik GmbH
    Inventor: Edgar Graupner