Patent ID: 7255559

Claim:
A disposable dental prophylaxis angle comprising: a driving shaft including a gear head, a shaft neck, a shaft shoulder and a shaft tail; a driven rotor including a rotor head, a rotor neck, a gear shoulder, a cup flange, a cup neck, and a cup holder; a driven rotor retainer having a horse-shoe shape, said rotor retainer connected to said rotor head to ensure that said rotor gear shoulder stays connected to said shaft gear head; a driving shaft locking means including a washer and a paw positioner, said shaft locking means locking a shoulder of said shaft tail to ensure said shaft gear head stays connected to said rotor gear shoulder; a housing including a longitudinal passageway opening outwardly for coupling with a handpiece and receiving said driving shaft, and a transverse passageway opening outwardly at a right angle to said longitudinal passageway for coupling with a prophy cup and receiving said driven rotor.