Patents by Inventor Jay A. Seifert

Jay A. Seifert 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).

  • Traction-driven composite sludge raking mechanism for sedimentation tanks
    Patent number: 3959152
    Abstract: A large sedimentation tank having a traction-driven composite sludge raking mechanism provided with lift capability, and comprising a rotary traction-driven drive arm of girder-like construction exposed above the liquid level, and draft-connected to an inner load yielding self-liftable rake arm operating in the central sludge accumulation zone in the tank, and also connected to an outer complementary rake structure operating in an outer annular zone to move sludge therefrom into the central accumulation zone.
    Type: Grant
    Filed: March 17, 1975
    Date of Patent: May 25, 1976
    Assignee: Dorr-Oliver Incorporated
    Inventors: Jay A. Seifert, Donald R. Hill, Michael Smith