Patent ID: 8366120

Claim:
A chuck for a bit comprising: a body including a first end and a second end spaced from the first end along a longitudinal axis of the body, with the second end of the body including an engaging groove adapted for releasably receiving the bit, with the second end further including a coupling section having a first chamfered flat face parallel to and spaced from the longitudinal axis, with the first end of the body being adapted for releasably coupling with a tool such that rotational movement of the tool causes rotational movement of the bit; a sleeve mounted around the body and movable relative to the body along the longitudinal axis between a coupling position and a releasing position, with the sleeve including a first compartment slideably receiving the second end of the body and a second compartment spaced from the first compartment along the longitudinal axis and slideably receiving the first end of the body, with the sleeve further including an engaging section having a first flat surface parallel to and spaced from the longitudinal axis and coupled with the first chamfered flat face of the coupling section of the body, wherein the sleeve and the body jointly rotate about the longitudinal axis when the sleeve is manually rotated while allowing movement of the sleeve relative to the body along the longitudinal axis between the coupling position and the releasing position, with the sleeve further including a flange on an outer periphery thereof, with the flange adapted to be gripped by a user for moving the sleeve from the coupling position to the releasing position, with the flange adapted for providing friction when the sleeve is manually rotated about the longitudinal axis by rotating the flange; a positioning member mounted between the sleeve and the body and movable between an engaged position and a disengaged position, with the positioning member being in the engaged position with the bit engaged with and retained by the positioning member in the engaging groove of the body when the sleeve is in the coupling position, with the positioning member movable between the engaged position and the disengaged position with the bit removable from the engaging groove of the body when the sleeve is in the releasing position; and a spring mounted between the body and the sleeve, with the spring biasing the sleeve to the coupling position.