US Patent 9504478 Rotary tool with improved coupling assembly

A surgical device comprising a handle assembly comprising a drive shaft; a handle assembly adapter for connection to the handle assembly comprising a transmission shaft for connection to the drive shaft; and a nosepiece assembly for connection to the adapter and for securing the shaft of a working element to the transmission shaft; wherein the adapter and the nosepiece assembly each comprise a locking collar; wherein the adapter and the handle assembly each comprise a connector assembly comprising a housing comprising an opening; a collet sleeve disposed within the opening, connected to an input shaft, and comprising a lumen for receiving an output shaft; a locking element for locking and unlocking the output shaft to the collet sleeve; and a cam element movable between first and second positions such that movement of the locking collar causes the cam element to move between the first position and the second position.