Patents by Inventor Al S. Huff

Al S. Huff 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).

  • Weir skimmer
    Patent number: 4224156
    Abstract: An apparatus for controlling the liquid level of overflow ponds and the like. It comprises a vertical standpipe having a polymer feed inlet near its bottom, a valve for controlling flow of polymer to the polymer feed inlet, at least 1 fluid discharge inlet near the bottom of the vertical standpipe. A flexible hose connects the fluid discharge inlet to a corresponding opening located in a horizontal plate which is adapted to ride up and down on the standpipe. The horizontal plate is fitted with a float, filter and a valve shut off plunger.
    Type: Grant
    Filed: November 9, 1978
    Date of Patent: September 23, 1980
    Assignee: Nalco Chemical Company
    Inventors: Dennis G. Pardikes, William F. Flowers, Al S. Huff, Andrew J. Young