Patent ID: 6293020
Filing Date: 2001-09-25
Classification: B21K,B23D,B26B,Y10S

Abstract:
A cutting instrument comprising:a cutting instrument body having a blade with a cutting edge;said cutting instrument body made of Type 60 Nitinol;said cutting instrument body having a hardness greater than about 50 on the Rockwell C scale, and said cutting edge heat treated to a hardness exceeding 57 on the Rockwell C scale for exceptional edge holding;an integral surface material on said instrument body having properties of extreme hardness, high electrical resistivity, chemical non-reactivity, slipperyness and a color selected from the group of light gold dark gold, red/purple, light blue, dark blue, silver and grey, said integral surface material being formed on said instrument body by heating said cutting instrument body to a temperature at which surfaces of said Type 60 Nitinol turns to a desired one of said colors, and allowing said cutting instrument body to cool slowly.