Patent ID: 7563061

Claim:
A chuck assembly comprising: a cylindrical body defining a bore; a jaw assembly associated with said cylindrical body and having one or more jaw elements, the one or more jaw elements movable in said bore between a non-clamping and clamping position; a drive mechanism coupled with said jaw assembly for moving the one or more jaw elements between said non-clamping and clamping positions; and a centering mechanism for centering a tool in said jaw assembly in said non-clamping position, said centering mechanism including at least one tool engaging centering member extending radially inward into said bore, said tool engaging member including a head portion cantilevered from a tail portion, said head portion continuous with said tail portion and said head portion angled with respect to said tail portion, said head portion adapted to engage the tool and said head portion positioned in said bore of said cylindrical body, said head portion movable in said bore between adjacent jaw elements.