Patents by Inventor Robert L. Hennesen

Robert L. Hennesen 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).

  • Barrier guard for shears, presses and the like
    Patent number: 4528868
    Abstract: A barrier guard for a machine having a machine surface including spaced brackets mounted on the machine, spaced elongated links pivotally mounted on the spaced brackets, a grille mounted for sliding movement in first slots in the elongated links, second slots in the brackets, followers attached to the grille and located in the second slots to cause the grille to move rectilinearly in the first slots when the elongated links are caused to pivot, and a base bar on the grille for providing progressively greater clearances from the machine surface when the base bar moves in a predetermined direction.
    Type: Grant
    Filed: June 24, 1982
    Date of Patent: July 16, 1985
    Assignee: Niagara Machine & Tool Works
    Inventor: Robert L. Hennesen