Patents by Inventor Donald E. Bates

Donald E. Bates 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).

  • Heat pump monitor apparatus for fault detection in a heat pump system
    Patent number: 4574871
    Abstract: A fault detection apparatus which monitors a heat pump system used for maintaining a selected temperature in an enclosed space is disclosed. The apparatus includes measuring the run time for a heat pump compressor, ascertaining the status of the heat pump reversing valve, measuring the run time of an auxiliary heating unit, measuring the run time of the defrost cycle of the heat pump, and sensing outdoor temperature. The compressor, the auxiliary heating unit, and the defrost cycle run times are each compared with their respective expected run times for the outdoor temperature sensed and for a known heat loss rate for the enclosed space. The apparatus will send out an alarm signal when the heat pump system fails to operate within the expected parameters.
    Type: Grant
    Filed: May 7, 1984
    Date of Patent: March 11, 1986
    Inventors: David W. Parkinson, Donald E. Bates, Raymond F. Poteralski