Patents by Inventor David B. Warner

David B. Warner 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).

  • Constraining ring for a hip cup
    Patent number: 5639280
    Abstract: The hip cup of this invention includes a porous metal outer shell, preferably formed from fiber metal, and a compression molded polyethylene component defining an articulating surface at its center for contact with a prosthetic femoral head. The porous outer shell is placed within a mold and the polyethylene component is compression molded within the shell. To prevent the porous shell from collapsing or distorting about its equatorial edge (and thereby distorting the articulating surface) a constraining ring is fitted over the edge of the shell prior to the molding of the polyethylene component. The ring is held in contact with the shell by the molded polyethylene. The constraining ring prevents the edges of the shell from radially distorting during impaction into a prepared acetabulum or during use.
    Type: Grant
    Filed: February 2, 1996
    Date of Patent: June 17, 1997
    Assignee: Zimmer, Inc.
    Inventors: David B. Warner, Stephen G. Gilbert
  • Femoral stem prosthesis
    Patent number: 5326376
    Abstract: A tapered, collarless femoral hip joint prosthesis formed of a surface hardened titanium alloy having a highly polished surface is provided.
    Type: Grant
    Filed: August 23, 1993
    Date of Patent: July 5, 1994
    Assignee: Zimmer, Inc.
    Inventors: David B. Warner, Leslie N. Gilbertson, Gregory S. Meadows, Kenneth S. Shipp