Patents by Inventor Randal K. Draper

Randal K. Draper 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).

  • Shrouded electric outboard motor
    Patent number: 5445545
    Abstract: The present invention relates to an aquatic propulsion system of modular construction. The system includes an electric motor and a gearbox that are removables as a unit. The electric motor and gearbox are housed in a two piece enclosure. A retaining ring threadably engages one of said pieces while engaging a flange on the other piece to secure the two pieces together. Optional struts are attached to the retaining ring that support a shroud around the system's propeller.
    Type: Grant
    Filed: October 11, 1994
    Date of Patent: August 29, 1995
    Inventor: Randal K. Draper