Patents by Inventor Fred E. Simpson

Fred E. Simpson 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).

  • Openable dual windshield arrangement for construction vehicles
    Patent number: 4072338
    Abstract: The frame of an operator's cab has a sub-frame pivotally mounted thereon. An upper windshield is fixedly mounted on the sub-frame and a lower windshield is slidably mounted in a co-linear track defined on the main frame and on the sub-frame. A first latch is mounted on the sub-frame to releasably attach the sub-frame and upper windshield in a generally vertical closed position or a generally horizontal open position on the frame of the operator's cab.
    Type: Grant
    Filed: April 5, 1976
    Date of Patent: February 7, 1978
    Assignee: Caterpillar Tractor Co.
    Inventors: Dean M. Lawrence, Fred E. Simpson