Patents by Inventor Timothy M. Chadwick

Timothy M. Chadwick 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).

  • Threaded insert for bone plate screw hole
    Patent number: 5976141
    Abstract: A threaded insert is designed to snap into a standard bone plate hole. The insert has an upper section divided into sectors by slots, a lower section having deflectable tabs with external projections, and a central threaded hole. When a standard bone screw is tightened in the insert, the insert rigidly fixes the screw to the plate by collapsing the threads of the insert onto the threads of the screw, and by expanding the sectors of the upper section to clamp the bone plate.
    Type: Grant
    Filed: February 23, 1995
    Date of Patent: November 2, 1999
    Assignee: Synthes (U.S.A.)
    Inventors: Rene Haag, Michael H. Mackin, Jeffrey W. Mast, Timothy M. Chadwick