Patents by Inventor Jimmie J. Trushlood

Jimmie J. Trushlood 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 controlling air flow to a vehicle air conditioning unit
    Patent number: 5623835
    Abstract: An engine cooling fan control system includes a vehicle speed sensor, a pressure sensor for sensing the pressure of refrigerant provided to a refrigerant condenser forming part of the vehicle air conditioning system and a controller responsive to the vehicle speed and refrigerant pressure signals to operate an engine cooling fan. The engine cooling fan is activated continuously while vehicle speed is below a first speed threshold if the refrigerant pressure exceeds a first pressure. While the vehicle speed is above the first speed threshold, but below a second speed threshold, the engine cooling fan is activated for a predetermined duration if the refrigerant pressure is above the first pressure. Finally, while the vehicle speed is above the second speed threshold, the engine cooling fan is activated in response to the refrigerant pressure exceeding the first pressure and deactivated in response to the refrigerant pressure falling below a second lower pressure.
    Type: Grant
    Filed: August 31, 1995
    Date of Patent: April 29, 1997
    Assignee: Cummins Engine Company, Inc.
    Inventors: Robert J. Layman, Rebecca J. Darr, Jimmie J. Trushlood