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US 4,981,756 AGranted
Method for coated surgical instruments and tools
AssigneeVac-Tec Systems, Inc.
InventorHarbhajan S. Rhandhawa
Life of this patent
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Abstract
A process for producing corrosion resistant and wear resistant medical tools and instruments by coating high strength low-carbon martensitic stainless steels with a thin, hard layer of refractory metal compound, preferably via cathodic arc plasma deposition technology. The invention also covers the coated medical tools produced via such process.
Claims19
A corrosion resistant, coated medical tool consisting of:
- (a) a high strength, solid stainless steel tool;
- and
- (b) a thin, high-density coating on the surface of said tool of a zirconium-based or hafnium-based metal compound.
A corrosion resistant, coated medical tool comprising:
- (a) a high strength, low-carbon martensitic stainless steel tool;
- and
- (b) a high density coating of less than 3 microns composed of zirconium nitride, said coating applied by cathodic arc plasma deposition.
A corrosion resistant, coated medical tool consisting of:
- (a) a high strength, solid stainless steel tool;
- and
- (b) a thin coating on the surface of said tool of zirconium nitride.
A process for coating metal medical tools consisting of:
- cleaning said tool prior to coating;
- and
- applying onto the surface of said tool a coat of a thin high density layer of a zirconium-based or hafnium-based metal compound.
Dependencies are inferred from the claim text.