Patents by Inventor Shelby A. Evans

Shelby A. Evans 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).

  • Patent number: 6033332
    Abstract: The invention comprises an all gear mechanism for a continuously variable transmission that provides a wide range of output speeds and torque. The basic elements of the transmission are two planetary gear sets used as a power divider and a power combiner along with a one-way clutch and a hydraulic pump and hydraulic pump control devices. The controlling devices provide a continuously variable force against the low rpm power path. A high rpm gear train and a low rpm gear train are provided to vary the output. Appropriate sized gears are used to produce the desired overall output ratio. The output ratio is determined by engine capability or by the operator.
    Type: Grant
    Filed: September 4, 1998
    Date of Patent: March 7, 2000
    Inventor: Shelby A. Evans