Patent ID: 7303394

Claim:
A hand held piece for dental or surgical use, comprising: a hollow shaft associated with means for driving in rotation, and in the hollow shaft are mounted a clamp for gripping a shank of a removable tool, a loosening sleeve and a sliding pusher placed in a rear end of the hollow shaft and controlled by a manual button for moving the clamp and the loosening sleeve towards each other, wherein the clamp includes an annular part and jaws arranged for gripping the shank of the removable tool via resilience in a working position, the jaws extending longitudinally from the annular part towards the loosening sleeve, wherein the loosening sleeve includes external oblique surfaces capable of abutting against free ends of the jaws to move the jaws apart, wherein the loosening sleeve is mounted in a front end of the hollow shaft, and wherein the clamp is slideably mounted in the shaft, and the jaws thereof are directed forwards, and the clamp is longitudinally connected to the pusher to enable an operator to move the clamp forwards to abut against the loosening sleeve.