Patents by Inventor Joe H. Trumbly

Joe H. Trumbly 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).

  • Foldable propeller assembly
    Patent number: 5183384
    Abstract: A marine propeller assembly which folds completely parallel to a drive shaft axis when the boat motor is disengaged is disclosed. When the boat motor is disengaged the propeller blades fold rearward due to the force caused by the moving water under the boat. When the boat motor is engaged and the drive shaft beings to rotate, the centrifugal force causes the propeller blades to extend out 90 degrees to the drive shaft.
    Type: Grant
    Filed: May 16, 1988
    Date of Patent: February 2, 1993
    Inventor: Joe H. Trumbly