Patents by Inventor David W. Barr

David W. Barr 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: 5072715
    Abstract: An improved slingshot includes an elongated mainframe and a fork assembly pivotally mounted about a transverse axis at the forward end of the mainframe. The fork assembly includes a pivotal flip-fork resiliently biased to normally assume a lowered neutral non-shooting position in which is lies below the path of flight of a projectile shot by the slingshot. The flip-fork is pivotally movable against the bias to an upright shooting position upon stretching of a power band connected to the flip-fork. Upon being moved to its shooting position, the flip-fork stores energy in addition to that being stored in the elastic power band as the latter is stretched to load the slingshot. The mainframe of the slingshot includes a hand grip located between forward and rearward ends of the mainframe and rearward and forward frame portions extend respectively rearwardly and forwardly of the hand grip.
    Type: Grant
    Filed: April 25, 1990
    Date of Patent: December 17, 1991
    Inventor: David W. Barr