Nut-runner with reverse rotation brake

Claim 1

IN A ROTARY NUT-RUNNING TOOL INCLUDING A MOTOR HAVING A ROTATION IN A POSITIVE DIRECTION, AND AN OUTPUT SPINDLE; A TORQUE RELEASABLE CAM CLUTCH COMPRISING A DRIVEN PART AXIALLY SLIDABLE RELATIVE TO AND DRIVINGLY SPLINED TO THE SPINDLE, A DRIVING PART CARRIED BY THE MOTOR, A SPRING YIELDABLY PRESSING THE DRIVEN PART AXIALLY INTO CLUTCHED ENGAGEMENT WITH THE DRIVING PART, CAM MEANS ON THE DRIVEN PART, AND CAMMING MEANS ON THE DRIVING PART COOPERABLE WITH THE CAM MEANS ON THE DRIVEN PART TO CAM THE LATTER AXIALLY ANGAINST THE RESISTANCE OF THE SPRING OUT OF ENGAGEMENT UPON THE DRIVING PART RELIZING A PREDETERMINED TORQUE LOAD, WHEREIN THE SPRING IS ADAPTED FOLLOWING SUCH DISENGAGEMENT TO RETURN THE DRIVEN PART AXIALLY INTO RE-ENGAGEMENT AND WHEREIN THE CAM MEANS OF THE DRIVEN PART IS COOPERABLE WITH THE CAMMING MEANS OF THE DRIVING PART TO CAUSE RELATIVE REVERSE ROTATION OF THE DRIVEN PART AND AS A CONSEQUENCE REVERSE ROTATION OF THE SPINDLE DURING THE TIME THE DRIVEN PART MOVES AXIALLY TO RE-ENGAGEMENT; AND BRAKING MEANS HAVING AUTOMATIC RESPONSE TO A PREDETERMINED LIMITED DEGREE OF SUCH REVERSE ROTATION TO BRAKE THE SPINDLE AGAINST FURTHER ROTATION WHILE PERMITTING THE DRIVEN PART TO RETURN AXIALLY TO RE-ENGAGEMENT.