Patents by Inventor Wilbur D. Norris

Wilbur D. Norris 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: 5409238
    Abstract: The present invention target practice device is fitted with a hub which, together with a malleable key, pivotally drives a holder upon which a target is mounted to at least two positions--a lay down position and a pop-up position. The malleable key has a composition that is sufficiently strong to enable the drive shaft of the motor to pivotally drive the holder, and yet be sufficiently weak to be sheared at a predetermined torque. Thus, if the target practice device enters into a "fail mode", instead of causing the drive motor to jam up and to thereby expose the target practice device to potential harm, the key is sheared off so that no damaging load is placed on the drive shaft of the drive motor.
    Type: Grant
    Filed: August 3, 1993
    Date of Patent: April 25, 1995
    Inventor: Wilbur D. Norris