Patents by Inventor Robert A. Shiffler

Robert A. Shiffler 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: 4067588
    Abstract: A construction vehicle, such as a wheel-type loader, has a ladder assembly mounted on a side thereof for access to an operator's cab mounted on a platform of the vehicle. The ladder assembly comprises a pair of vertically disposed and parallel hand rails releasably attached to the side of the vehicle and a plurality of horizontally disposed and vertically spaced steps secured between the hand rails. Upper flared portions of the hand rails diverge upwardly and outwardly away from each other to form guide means to guide the feet of an operator descending from the platform onto an upper step of the ladder assembly.
    Type: Grant
    Filed: February 9, 1976
    Date of Patent: January 10, 1978
    Assignee: Caterpillar Tractor Co.
    Inventors: Michael P. Morge, Robert A. Shiffler