Patents by Inventor Norbert Friedrich Karl Sann

Norbert Friedrich Karl Sann 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).

  • Patent number: 7252759
    Abstract: A top or bottom mounted, in-line, in-tank return line filter element is mounted in a hydraulic reservoir. The reservoir includes a holding tank, at least one outlet extending from and one return line extending to the reservoir, an in-tank return line within the reservoir and extending to one return line, and an in-tank return line filter element mounted within the in-tank return line. The in-tank return line filter element includes an end cap, a filter media and a by-pass valve coupled thereto. The end cap includes a central fluid opening, a mounting surface for the filter media, and a peripheral attaching mechanism for attaching the filter element to the in-tank return line to form a filter assembly. The mounting surface is positioned between the central opening and the attaching mechanism such that an in-line, in-tank filter element is provided.
    Type: Grant
    Filed: July 12, 2004
    Date of Patent: August 7, 2007
    Assignee: Schroeder Industries, LLC
    Inventors: Steven R. Evanovich, Augustus O. Schroeder, Norbert Friedrich Karl Sann, Michael Otto Sakraschinsky, Christopher B. Bortnik, Joseph Francis Ickes