Method of manufacturing surgical implants from cast stainless steel and product
AssigneeRichards Medical Company
InventorsJohn Murley, Bob Wigginton, Imogene Baswell
Life of this patent
Estimating the term…
Abstract
A surgical implant is disclosed manufactured from cast austenitic stainless steel and cold-forged to a final shape. The endoprosthesis is initially a preform which is cast oversized in shape and dimensions. It is then compressed using the cold-forging process to its final size and shape. Using a cast material as a starting material and then compressing it substantially reduces the porosity of the material and increases its strength compared to a machined product from a wrought material.
Claims21
A medical prosthesis formed as a result of a method comprising the steps of:
- casting an oversized preform substantially in the same configuration of the medical prosthesis to be formed, from a corrosion resistant, austenitic, stainless steel;
- and
- cold-forging the preform in a closed die having cavities that correspond in shape to but are smaller than the preform, to reduce the overall dimensions of the preform to a final finished size defined by the cavity, and to strengthen the preform.
A method of manufacturing a medical prosthesis comprising the step of:
- casting an oversized preform from austenitic stainless steel;
- and
- cold-forging the preform in closed dies to reduce the overall dimension of the preform to finished size and to strengthen the preform.
Dependencies are inferred from the claim text.