Patents by Inventor Richard S. Hansen

Richard S. Hansen 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).

  • Composite expandable shaft
    Patent number: 5379964
    Abstract: An expandable shaft of the slotted type made of a fiber and resin composite material. The shaft is fabricated by first forming the central cylindrical core and then forming the rails by pultrusion. The rails are then bonded to the outer surface of the core.
    Type: Grant
    Filed: August 10, 1993
    Date of Patent: January 10, 1995
    Assignees: Addax, Inc., Goldenrod, Inc.
    Inventors: Alessio G. Pretto, Louis J. Keester, Richard S. Hansen