US 6,227,188 B1 · Method for improving wear resistance of abrasive tools

Abstract

A drill bit is provided with a cylindrical body portion fabricated from a plastic material. The body portion is fastened in concentric, end to end relation to a cylindrical cutter fabricated from a metallic material and having an array of cutting elements disposed thereon. The body portion and cutter are preferably tubular, wherein the cutting elements are disposed in an annular array, to facilitate core or crown drilling operations. The wall thickness of the tubular body portion may be increased relative that of the cutter to compensate for wear during drilling. The tubular body portions also may fabricated from a composite polymer including wear resistant particles, whiskers, fibers and the like disposed on inner and outer surfaces of the polymer body, or dispersed throughout the body.

Claims15

Dependent claims

A lightweight cutting tool comprising:

a cutter of substantially cylindrical configuration including an array of cutting elements, said cutter having a cutting end and a coupling end;
a shaft of substantially cylindrical configuration fabricated from a non-metallic composite material, said shaft having a cutter engagement end and a drill engagement end;
said cutter and said shaft adapted for concentric, end to end engagement with one another wherein said coupling end is substantially rigidly engaged with said cutter engagement end;
said drill engagement end being adapted for operative engagement with a driver for rotation of said cutting tool about the concentric axis.

1 more element

Dependencies are inferred from the claim text.

Method for improving wear resistance of abrasive tools

Life of this patent

Method for improving wear resistance of abrasive tools

Life of this patent

Abstract

Claims15