Patents by Inventor Ralph H. Fisher

Ralph H. Fisher 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).

  • Reversible cycle heating and cooling system
    Patent number: 4553401
    Abstract: A reversible mode heating and cooling system comprises a reversible heat pump unit having a compressor, a reversible valve, an indoor heat exchanger in heat exchange relationship with indoor ambient air a water cooled concentrator, refrigerant expansion means, an outdoor heat exchanger in heat exchange relationship with outdoor ambient air and an auxiliary heat exchanger in heat exchange relationship with a water source for enhancing the capacity and efficiency of the system to transfer heat to the refrigerant during the heating mode at low outdoor ambient temperatures. The concentrator is disposed downstream of the outdoor heat exchanger (condenser) in the cooling mode of operation to cool the refrigerant exiting the heat exchanger for enhancing its ability to absorb heat in the indoor heat exchanger (evaporator).
    Type: Grant
    Filed: January 14, 1985
    Date of Patent: November 19, 1985
    Inventor: Ralph H. Fisher
  • Reversible cycle heating and cooling system
    Patent number: 4493193
    Abstract: A reversible mode heating and cooling system comprises a conventional reversible heat pump unit having a compressor, a reversible valve, an indoor heat exchanger in heat exchange relationship with indoor ambient air, refrigerant expansion means and an outdoor heat exchanger in heat exchange relationship with outdoor ambient air, and operatively associated therewith, an auxiliary heat exchanger in heat exchange relationship with a heat exchange fluid for enhancing the capacity and efficiency of the system to evaporate refrigerant during the heating mode and to condense refrigerant during the cooling mode. The auxiliary heat exchanger is arranged for selective parallel or simultaneous parallel and series flow of refrigerant through the auxiliary heat exchanger and the outdoor heat exchanger to enhance the heating efficiency of the system at very low outdoor ambient temperatures.
    Type: Grant
    Filed: October 17, 1983
    Date of Patent: January 15, 1985
    Assignees: Rutherford C. Lake, Jr., John E. Duberg
    Inventor: Ralph H. Fisher
  • Reversible cycle heating and cooling system
    Patent number: 4409796
    Abstract: A reversible mode heating and cooling system comprises a conventional reversible heat pump unit having a compressor, a reversible valve, an indoor heat exchanger in heat exchange relationship with indoor ambient air, refrigerant expansion means and an outdoor heat exchanger in heat exchange relationship with outdoor ambient air, and operatively associated therewith, an auxiliary heat exchanger in heat exchange relationship with a heat exchange fluid for enhancing the capacity and efficiency of the system to evaporate refrigerant during the heating mode and to condense refrigerant during the cooling mode. The auxiliary heat exchanger is arranged for selective parallel or simultaneous parallel and series flow of refrigerant through the auxiliary heat exchanger and the outdoor heat exchanger to enhance the heating efficiency of the system at very low outdoor ambient temperatures and the cooling efficiency of the system at very high outdoor ambient temperatures.
    Type: Grant
    Filed: March 5, 1982
    Date of Patent: October 18, 1983
    Assignees: Rutherford C. Lake, Jr., Hayters Enterprises, Inc., John E. Duberg
    Inventor: Ralph H. Fisher