Patents by Inventor Robert H. Ravin

Robert H. Ravin 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).

  • Diesel heat pump
    Patent number: 4658771
    Abstract: A diesel powered emergency electrical generator for providing a back-up power supply for critical building systems. The diesel engine is heated by a heat pump in series with a resistance heater. The heat pump is normally cycled on and off to maintain the desired engine temperature and the resistance heater is employed only when the heat pump is unable, for whatever reason, to maintain the desired engine temperature. The heat pump includes a refrigerant to coolant condenser and an air to refrigerant evaporator and includes a centrifugal pump which operates continuously to maintain a continuous circulation of coolant through the engine and through the heat pump.
    Type: Grant
    Filed: September 20, 1985
    Date of Patent: April 21, 1987
    Assignee: Geo-Thermal Systems, Inc.
    Inventor: Robert H. Ravin
  • Diesel heat pump
    Patent number: RE33051
    Abstract: A diesel powered emergency electrical generator for providing a back-up power supply for critical building systems. The diesel engine is heated by a heat pump in series with a resistance heater. The heat pump is normally cycled on and off to maintain the desired engine temperature and the resistance heater is employed only when the heat pump is unable, for whatever reason, to maintain the desired engine temperature. The heat pump includes a refrigerant to coolant condenser and an air to refrigerant evaporator and includes a centrifugal pump which operates continuously to maintain a continuous circulation of coolant through the engine and through the heat pump.
    Type: Grant
    Filed: May 2, 1988
    Date of Patent: September 12, 1989
    Assignee: Electric Specialty, Inc.
    Inventor: Robert H. Ravin