Controllable dental turbine

摘要

A regulatable dental turbine includes an actuator arrangement which is provided for regulating the speed by varying the amount of an essentially constant volume stream of drive fluid striking a turbine wheel of the dental turbine. The change of the direction based on the actuator arrangement may bypass a portion of the volume hitting the blades of the dental turbine or may create a portion of the stream as a deceleration force acting on the turbine wheel. The actuator arrangement can operate in a speed-dependent fashion based on the flow deflected by the blades of the wheel on an impact surface or can act with a speed sensor determining the rate of rotation of the turbine wheel.