Patents by Inventor Joseph B. Lechtanski

Joseph B. Lechtanski 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).

  • System for monitoring the operation of an evaporator unit
    Patent number: 5677677
    Abstract: The difference between the temperature of a heat exchange medium leaving the evaporator unit of a chiller and the temperature of the refrigerant in the evaporator unit is monitored relative to a real time alarm limit for this temperature difference. The real time alarm limit is computed from time to time by a microprocessor. The value of the computed alarm limit will vary with the cooling load being experienced by the chiller's evaporator unit.
    Type: Grant
    Filed: April 21, 1995
    Date of Patent: October 14, 1997
    Assignee: Carrier Corporation
    Inventors: Paul J. Duff, John P. Larson, Joseph B. Lechtanski
  • System for monitoring the operation of a compressor unit
    Patent number: 5546073
    Abstract: The electrical current drawn by a drive motor for the compressor unit of a chiller is monitored relative to a real time alarm limit for this electrical current. The real time alarm limit is computed from time to time by a microprocessor. The value of the computed alarm limit will vary with the cooling load being experienced by the chiller's evaporator unit.
    Type: Grant
    Filed: April 21, 1995
    Date of Patent: August 13, 1996
    Assignee: Carrier Corporation
    Inventors: Paul J. Duff, John P. Larson, Joseph B. Lechtanski
  • System for monitoring the operation of a condenser unit
    Patent number: 5539382
    Abstract: The difference between the temperature of refrigerant leaving the condenser unit of a chiller and the temperature of water leaving the same condenser unit is monitored relative to a real time alarm limit for this temperature difference. The real time alarm limit is computed from time to time by a microprocessor. The value of the computed alarm limit will vary with the cooling load being experienced by the chiller's evaporator unit.
    Type: Grant
    Filed: April 21, 1995
    Date of Patent: July 23, 1996
    Assignee: Carrier Corporation
    Inventors: Paul J. Duff, John P. Larson, Joseph B. Lechtanski
  • System for monitoring condenser pressure
    Patent number: 5539385
    Abstract: Refrigerant pressure in the condenser unit of a chiller is monitored relative to a real time alarm limit for the refrigerant pressure. The real time alarm limit is computed from time to time by a microprocessor. The value of the computed alarm limit will vary with the cooling load being experienced by the chiller's evaporator unit.
    Type: Grant
    Filed: April 21, 1995
    Date of Patent: July 23, 1996
    Assignee: Carrier Corporation
    Inventors: Paul J. Duff, John P. Larson, Joseph B. Lechtanski