Patents by Inventor Donald G. Hillebrand

Donald G. Hillebrand 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: 4624493
    Abstract: An energy absorbing bumper mounting arrangement including a longitudinally extending tubular member having a forward portion secured to a vehicle bumper and an aft portion slidably received in a circular opening formed in a vehicle frame portion. A cylindrical capsule of thermoplastic polyester elastomer material has a central passage telescopically receiving the tubular member aft portion. Abutment means fixed on the tubular member engages an intermediate frame wall preventing its forward travel. A preloaded coil spring is concentrically disposed about the tubular member between the forward end of the capsule and the abutment means. The capsule is surrounded by a chamber defined by wall means formed in the frame. A predetermined impact load on the bumper causes the capsule to elastically and plastically deform in a radially outward manner such that upon contacting the chamber walls a permanent set corrugated-like undulation is formed resulting in the dissipation of impact energy.
    Type: Grant
    Filed: September 30, 1985
    Date of Patent: November 25, 1986
    Assignee: Chrysler Motors Corporation
    Inventors: Donald G. Hillebrand, Donald A. Mugford