Patents by Inventor Lee R. Van Dixhorn

Lee R. Van Dixhorn 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).

  • Coolant circulation system for engine heat pump
    Patent number: 5249742
    Abstract: A coolant fluid circulation subsystem for engine driven heat pump systems including a coolant fluid loop through the engine and a recuperator, and through a thermostatic control valve operable to convey and to modulate flow from a coolant reservoir during engine operation, with the coolant fluid being selectively switchable, between first or second heat exchangers in heat exchange relation with the indoor and outdoor ambient condition selectively. An auxiliary pump and coolant fluid heater are provided in the subsystem to increase the heat contained in the coolant fluid and to exchange heat to the indoor ambient condition.
    Type: Grant
    Filed: July 24, 1992
    Date of Patent: October 5, 1993
    Assignee: Gas Research Institute
    Inventors: William G. Atterbury, Douglas E. Boyd, Jan B. Yates, Lee R. Van Dixhorn