Patents by Inventor Werner H. Leikam

Werner H. Leikam 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).

  • Clarifier tanks
    Patent number: 5269928
    Abstract: A clarifier tank having a center column is provided with a center-driven bottom rake mechanism for settled sludge removal, a rotating scum rake mechanism comprised of pipes with longitudinal openings for scum removal via the center column, the rake mechanisms rotating in the same or opposite directions at different speeds, and submerged effluent pipes projecting from the sidewall of the tank toward the center of the tank to drain the clarified sewage into an effluent launder exterior of the tank.
    Type: Grant
    Filed: December 18, 1992
    Date of Patent: December 14, 1993
    Assignee: Dorr-Oliver Incorporated
    Inventor: Werner H. Leikam