Patents by Inventor Robert E. Emrie

Robert E. Emrie 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).

  • Underdrain unit with air/water backwash for granular filtration system
    Patent number: 4331542
    Abstract: A self-supporting underdrain unit to be placed upon the substantially horizontal floor of a filter tank to provide a liquid filtration system is disclosed. The self-supporting underdrain unit provides separately controllable fluid and exhaust gas header systems for backwashing. The exhaust gas and backwashing fluid are mixed in a turbulent mixing zone to provide superior backwashing and cleansing action.
    Type: Grant
    Filed: August 1, 1980
    Date of Patent: May 25, 1982
    Assignee: Enviroquip, Inc.
    Inventor: Robert E. Emrie