Patent ID: 8123523

Claim:
A dental tool, comprising: a prophy angle; and an adapter for receiving and driving the prophy angle, wherein the prophy angle includes a housing and a rotor, and the adapter includes a body, a drive shaft for driving the rotor, a slidable sleeve, and a nose for receiving the prophy angle, wherein the rotor includes a lock, the housing includes a lock receiver for receiving the lock, the lock receiver permitting rotation of the lock within the lock receiver and restraining linear movement of the lock in a direction substantially parallel to a rotational axis of the rotor and towards an opening in the housing, wherein the lock having a lock channel configured to receive a tip of a drive shaft, the engagement of the lock channel and the tip restraining movement of the rotor in a direction towards the drive shaft and restraining movement of the rotor in the direction substantially parallel to the rotational axis of the rotor, wherein in a retracted position of the slidable sleeve, a gear of the drive shaft is revealed, and in an extended position of the slidable sleeve, the slidable sleeve at least partially covers the gear.