Patents by Inventor Dave C DeWaard

Dave C DeWaard 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).

  • Manure separation for digester method and apparatus
    Patent number: 7306731
    Abstract: A method and apparatus for removing settleable solids and unsettleable solids from a partially closed flush system in a diary milking operation whereby a first processing tank bottom removes settleable solids contained therein where the net current flow vertically in the process tank is less than the settling rate of the settleable solids contained therein. The process tank batch feeds a plurality of thickening tanks that are each allowed to settle for a period of time before transferring fluid is to a second separator. The method and apparatus is particularly conductive for feeding a digester.
    Type: Grant
    Filed: August 12, 2004
    Date of Patent: December 11, 2007
    Assignee: Daritech, Inc.
    Inventor: Dave C DeWaard