Patents by Inventor Mark F. Clifford

Mark F. Clifford 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).

  • Patent number: 5953837
    Abstract: A cylindrical tank is situated on a bed of a vehicle. A tank opening is provided at a top of the tank. An agitator is provided within the tank. A heating unit such as an oil fired boiler, comprises a burner unit situated on the bed, and fire tube heating elements which longitudinally span an interior surface of the tank. Drain outlets are provided in a bottom of the tank. Discharge tubes run from the drain outlets to discharge outlets beneath the tank. Drain hoses may be connected to the discharge outlets and routed to an appropriate drainage location. A plow blade apparatus is connected to a front of the cab. The plow blade apparatus is generally trough shaped and includes a first Archimedean screw disposed longitudinally therein. An inclined trough has a low end thereof disposed next to the plow blade apparatus. The inclined trough spans from the plow blade apparatus to a high end above the tank. The inclined trough contains a second Archimedean screw disposed longitudinally therein.
    Type: Grant
    Filed: October 19, 1998
    Date of Patent: September 21, 1999
    Inventor: Mark F. Clifford