Patents by Inventor William W. Sellers

William W. Sellers 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).

  • Asphalt heating system
    Patent number: 4661684
    Abstract: An asphalt heating system is comprised of a fuel fired, flue type tank heater, a heat transfer oil system for heating the oil circulated through the plant, and an electric booster heater for heating the oil and for use as a back-up heating means for the tank heater. Control means are provided for automatically activating the electric booster heater in the event of flame failure of the tank heater.
    Type: Grant
    Filed: October 16, 1978
    Date of Patent: April 28, 1987
    Inventor: William W. Sellers
  • Storage tank heater
    Patent number: 4172445
    Abstract: A tank heater for a storage tank is provided with a fuel fired burner assembly, a heat transfer tube extending from the burner assembly a substantial longitudinal extent within the storage tank for the transfer of heat to the contents of the storage tank and a combustion chamber within the heat transfer tube adjacent the burner assembly, the combustion chamber being constructed in the form of a plurality of concentric tubes in a configuration to control the rate of heat dissipation.
    Type: Grant
    Filed: December 12, 1977
    Date of Patent: October 30, 1979
    Inventor: William W. Sellers