Patents by Inventor Steven B. Helgeson

Steven B. Helgeson 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).

  • Transport temperature control unit and methods of defrosting an evaporator coil of the same
    Patent number: 7032395
    Abstract: A transport temperature control unit and methods of defrosting an evaporator coil of a transport temperature control unit. The transport temperature control unit includes an evaporator coil, an ambient air temperature sensor for sensing an ambient air temperature, a return air temperature sensor for sensing a return air temperature, a discharge air temperature sensor for sensing a discharge air temperature, an evaporator coil temperature sensor for sensing an evaporator coil temperature, and a controller. The controller initiates a defrost cycle when a large temperature differential occurs over the evaporator coil.
    Type: Grant
    Filed: March 24, 2003
    Date of Patent: April 25, 2006
    Assignee: Thermo King Corporation
    Inventors: Jay L. Hanson, Steven B. Helgeson
  • Transport temperature control unit and methods of defrosting an evaporator coil of the same
    Publication number: 20030202557
    Abstract: A transport temperature control unit and methods of defrosting an evaporator coil of a transport temperature control unit. The transport temperature control unit includes an evaporator coil, an ambient air temperature sensor for sensing an ambient air temperature, a return air temperature sensor for sensing a return air temperature, a discharge air temperature sensor for sensing a discharge air temperature, an evaporator coil temperature sensor for sensing an evaporator coil temperature, and a controller. The controller initiates a defrost cycle when a large temperature differential occurs over the evaporator coil.
    Type: Application
    Filed: March 24, 2003
    Publication date: October 30, 2003
    Applicant: Thermo King Corporation
    Inventors: Jay L. Hanson, Steven B. Helgeson