Patents by Inventor John Charles Kenzie Overall

John Charles Kenzie Overall 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: 5983890
    Abstract: A fireplace adapted to heat multiple heating zones of a building, controlled by a control circuit which adjusts the heat input to the fireplace, airflow through the fireplace and ducting of the airflow to the various zones individually in response to a call for heat by thermostats in the zones. The fireplace may also be adapted to provide cooled or circulated air to the zones and may also serve to provide heating to the zones in the event of an electrical power outage. The fireplace is provided with a cabinet having ducts through which air is conveyed by use of a fan to a tube-type heat exchanger, the heat exchanger also in communication with the hot flue gases exiting the combustion chamber of the fireplace. The air heated by the heat exchanger is conveyed to a multitude of fireplace outlets, each of which is provided with a damper which regulates the airflow through the outlet to one of the zones to be heated, depending on whether that zone calls for heat through its thermostat.
    Type: Grant
    Filed: January 9, 1998
    Date of Patent: November 16, 1999
    Assignee: Canadian Gas Research Institute
    Inventors: Martin Thomas, Sydney Richard Barkhouse, John Charles Kenzie Overall, Dick D. Gepilano, James Karl Georgieff, Heinz H. Rieger