Patent ID: 7395874

Claim:
A slaving and blocking device for transmitting a torque from a driving slaving part to a driven part and for stopping the driven part at a torque engaging the driven part, comprising means for slaving fixable on the driving part in a manner fixed against relative rotation and having slaving claws that are offset from one another in a circumferential direction; a roller star wheel which is located in said means for slaving and is connectable to the driven part in a manner fixed against relative rotation; clamping bodies located in freewheeling fashion in the circumferential direction between said slaving claws and points of a star of said roller star wheel; a stationary clamping ring located concentrically to said means for slaving and said roller star wheel and having an inner annular face forming a counterpart clamping face for said clamping bodies; and radially displaceable centrifugal force elements located in said roller star wheel such that above a predetermined rpm said force elements clamp said roller star wheel firmly to said means for slaving, wherein the slaving and blocking device is a spindle block which transmits torque from a rotary drive to a driven spindle and stops the driven spindle at a torque that engages the driven spindle.