Patent ID: 7156402

Claim:
A drill chuck comprising: a chuck body centered on and rotatable about an axis and having a screwthread; a main sleeve axially fixed but rotatable about the axis on the body and formed centered on the axis with a plurality of angled forwardly open guides; respective clamping jaws displaceable in the guides; a pusher axially engageable with clamping jaws and axially forwardly displaceable relative to the chuck body to shift the clamping jaws axially forward and radially inward in the respective guides and axially rearwardly displaceable relative to the chuck body to shift the clamping jaws axially rearward and radially outward in the respective guides; a coupling jaw threadedly engaging the screwthread of the chuck body, engageable with the pusher for axially coupling the coupling jaw to the pusher, and having a deflectable front end; and means for coupling the sleeve to the coupling jaw for joint rotation therewith.