Patents by Inventor Shane-Mau Wu

Shane-Mau Wu 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: 4429888
    Abstract: A ridable toy dump truck powered by foot pedals to selectively either rotate wheels to propel the dump truck across a surface or to lift or recover a dump bed. The rotational force derived from the foot pedals is transmitted through a chain to a drive shaft. A second sprocket on the drive shaft transmits rotational force to predetermined wheels to propel the vehicle, while a third sprocket on the drive shaft transmits force to raise or lower the dump bed. A sliding clutch selects whether the second or the third sprocket is driven. A control handle engages the clutch so that a rider may select between propelling the dump truck across a surface, or raising or lowering the dump bed.
    Type: Grant
    Filed: December 22, 1981
    Date of Patent: February 7, 1984
    Inventor: Shane-Mau Wu