Patents by Inventor Richard J. Stafford, III

Richard J. Stafford, III 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).

  • Active railroad spike and tie plate interconnection therefor
    Patent number: 5024381
    Abstract: A rail spike for holding a tie plate on a tie, embodied in accordance with the invention so that tie cutting is prevented, spike removal for track maintenance is facilitated, and a free rail load wave is allowed. This preferably is attained by providing the spike with left and right side tapered shoulders and a tapered rear surface, such that a unique wedging and swaging action occurs in the tie plate hole during a final driving of the spike, limiting the depth of penetration of the spike into the tie and securely maintaining the gauge of the tie plate on the tie.
    Type: Grant
    Filed: March 10, 1989
    Date of Patent: June 18, 1991
    Assignee: Stafford Rail Products, Inc.
    Inventor: Richard J. Stafford, III