Patent ID: 6648341
Filing Date: 2003-11-18
Classification: B23B,Y10S,Y10T

Abstract:
A chuck for use with a manual or powered driver having a rotatable drive shaft, said chuck comprising:a generally cylindrical body having a nose section and a tail section, said tail section being configured to rotate with said drive shaft and said nose section having an axial bore formed therein; and a plurality of jaws movably disposed with respect to said body toward and away from said axial bore, wherein each said jaw includes a back surface, a longitudinal tool engaging ridge opposite said back surface and disposed facing generally parallel to the axis of said axial bore, and a plurality of grinds formed in said longitudinal tool engaging ridge, wherein said plurality of grinds form a plurality of elongated longitudinal tool engaging ridges, and wherein said grinds are formed along a helical pattern on said tool engaging jaw ridges when said tool engaging ridges are disposed at a predetermined position with respect to the axis of said axial bore.