Patent ID: 8272646

Claim:
A quick change jaw assembly for a chuck having a rotational axis comprising: a master jaw configured for mounting to the chuck for movement toward and away from the rotational axis, the master jaw including a first pair of coplanar abutment surfaces defining a first aperture; a clamping device including a dovetail portion being disposed in the first aperture of the master jaw, wherein the dovetail portion rests above the first pair of coplanar top surfaces of master jaw, the clamping device further including a cylindrical member extending from the dovetail portion, the cylindrical member being disposed in the aperture of the master jaw; a top jaw formed with a groove longitudinally extending along a length of the top jaw, the groove being complementary to the dovetail portion and configured for engaging the dovetail portion, the top jaw including a second pair of coplanar abutment surfaces extending along opposite sides of the groove; and a cam disposed in the master jaw for actuating the clamping device for urging the second pair of coplanar abutment surfaces of the top jaw into coengagement with the first pair of coplanar abutment surfaces of the master jaw.