John A Crep

US Patent:

39785289, Sep 7, 1976

Filed:

Jun 26, 1975

Appl. No.:

5/590722

Inventors:

John Anthony Crep - West Nyack NY

Assignee:

Howmedica, Inc. - New York NY

International Classification:

A61F 124

US Classification:

3 191

Abstract:

This application describes a shoulder prosthesis having a metal humeral cup component with an extending stem for insertion into the intramedullary canal of the humerus bone. The shoulder or intracancellous component has a ball embraced within the cup between a pair of ultra high molecular weight polyethylene lining inserts, which are locked within the cup under a strong resilient plastic lock ring, which snaps into a circular groove about the rim of the cup. The mouth of the cup and lock ring have mutually engaging bevelled surfaces. The ball and attached scapular component freely pivot or articulate within the cup and lining inserts.