Patents by Inventor Donald M. Boldt

Donald M. Boldt 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).

  • System for transport of mixtures of solid particulate fuel and air, and rotary distributor suitable for use therein
    Patent number: 4313386
    Abstract: Fine particulate solid fuel particles are delivered from a venturi ejector to a rotating double-armed distributor which distributes fuel and air sequentially to conduits leading to the burner ejector of a kiln. The distributor is sealed and pressurized with air so as to provide the conduits with additional pulses of air following the times at which they receive fuel and air from the distributing operation.
    Type: Grant
    Filed: November 1, 1979
    Date of Patent: February 2, 1982
    Assignee: The Keller Corporation
    Inventors: Donald M. Boldt, Elton McClellan