Patent ID: 7780242
Filing Date: 2010-08-24
Classification: E02F,E21C

Abstract:
1. A rotatable tool assembly for insertion into a tool holder having a cylindrical opening having a given diameter, said tool assembly comprising a tool body having a tapered forward cutting end, an axial shank extending rearwardly of said forward cutting end, and a rearwardly facing annular surface between a rearward end of said forward cutting end and a forward end of said shank, a compressible sleeve around said shank, said compressible sleeve having an outer surface, a forward end, and a longitudinal slot having generally parallel spaced apart slot edges, said compressible sleeve having a cut out portion at said forward end, an annular wear ring having a central opening and a projection extending radially inward of said central opening, said wear ring around a central portion of said compressible sleeve with said projection axially aligned behind said cut out portion and compressing said compressible sleeve, and said outer surface being free of obstruction to the axial movement of said wear ring along said sleeve to said forward end.