Patents by Inventor Burton A. Featheringill

Burton A. Featheringill 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).

  • Sump-vented controller mechanism for vacuum sewerage transport system
    Patent number: 5570715
    Abstract: An apparatus for preventing waterlogging of the sensor and controller valves used to regulate operation of the vacuum interface valve in a sump vented vacuum sewerage system. A float valve operates in accordance with the sewage level in a sump pit and communicates atmospheric pressure to the sensor and controller valves while the sewage level is below a predetermined limit, but closes passage of sewage therethrough once the sewage level exceeds the predetermined limit. A pressure-relief valve may also be operatively connected to the float valve that vents excessive hydrostatic pressure buildups in the sump pit to the atmosphere.
    Type: Grant
    Filed: April 26, 1995
    Date of Patent: November 5, 1996
    Assignee: Airvac, Inc.
    Inventors: Burton A. Featheringill, John M. Grooms