Patents by Inventor Valentin Schroder

Valentin Schroder 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).

  • Split ring seal of a centrifugal pump
    Patent number: 4867638
    Abstract: A split ring seal of a centrifugal pump comprises two rings that consist of a sintered material and that are respectively connected in a frictional or positive manner to a front cover disk of the impeller and to the pump housing which are made of a cast polyamide as produced by the activated anionic polymerization of monomeric laurinlactam.
    Type: Grant
    Filed: March 9, 1988
    Date of Patent: September 19, 1989
    Assignee: Albert Handtmann Elteka GmbH & Co KG
    Inventors: Albert A. Handtmann, Gunter Haupt, Erwin Gebhard, Franz Fischer, Valentin Schroder