Patents Represented by Attorney Wayne Siverton

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  • Control method for a cryogenic unit
    Patent number: 6076360
    Abstract: Apparatus and methods for improving efficiency of a temperature conditioning system which employs a cryogenic liquid. A vapor powered ventilation motor is normally powered by vapor from the low pressure end of the evaporation coils. However, supplemental vapor is provided at start-up to provide immediate ventilation. In addition, vapor which bleeds off valves is cycled through the vapor powered motor or used to maintain a slight positive pressure when the system is shut down.
    Type: Grant
    Filed: July 10, 1998
    Date of Patent: June 20, 2000
    Assignee: Thermo King Corporation
    Inventors: Herman H. Viegas, Bradley G. Ellingson, Mark J. Buenz