Patents by Inventor Todd R. Betterley

Todd R. Betterley 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: 4989769
    Abstract: A guard for teeth on a cutting blade comprising a guard portion having a side part adapted to lay along one side of the teeth and a projecting part adapted to project past the points of the teeth, an anchor portion adapted to be fixed to the blade at a position spaced from the teeth, and a hinge portion of resiliently flexible polymeric material joining the guard and anchor portions. The hinge portion affords movement of the guard portion relative to the anchor portion from a normal protecting position along and projecting past the teeth, to a cut position spaced from the teeth so that the teeth can be used to cut material, while biasing the guard portion to its normal protecting position.
    Type: Grant
    Filed: July 20, 1989
    Date of Patent: February 5, 1991
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Frederic A. Longworth, Todd R. Betterley