Percussion tool for tightening and loosening bolts and nuts

Claim 1

A POWER OPERATED IMPACT WRENCH TOOL COMPRISING A ROTATABLE OUTPUT SHAFT ADAPTED TO DRIVE A WORKPIECE WITH A SERIES OF TORSIONAL IMPULSES, A MOTOR FOR DRIVING SAID SHAFT WITH A SERIES OF ROTATIONAL IMPACTS, A SOURCE OF POWER, AN INITIATING ELEMENT MOVABLE BETWEEN A NORMAL POSITION AND AN OPERATED POSITION, MANUALLY CONTROLLED MEANS FOR EFFECTING MOVEMENT OF THE INITIATING ELEMENT FROM THE NORMAL TO THE OPERATED POSITION, MEANS OPERABLE UPON SUCH MOVEMENT FOR STARTING THE OPERATION OF THE TOOL, A TIME DELAY CONTROL MEANS INCLUDING A TIMING ELEMENT MOVABLE FORWARD FROM AN IDLE POSITION TO AN OPERATING POSITION, MEANS FOR MOVING THE TIMING ELEMENT FORWARD FROM ITS IDLE POSITION UPON OPERATION OF THE INITIATING ELEMENT, SAID CONTROL MEANS INCLUDING MEANS FOR RETARDING THE MOTION OF THE TIMING ELEMENT WHEREBY THE LATTER MOVES GRADUALLY AND PROGRESSIVELY FROM NORMAL TOWARD OPERATING POSITION DURING THE DELIVERY OF IMPACTS, SAID MOTION RETARDING MEANS CONTROLLING THE MOTION OF THE TIMING ELEMENT WHEREBY THE LATTER IS ARRANGED TO ATTAIN A PREDETERMINED OPERATING POSITION AFTER THE LAPSE OF A PREDETERMINED INTERVAL OF TIME FOLLOWING THE OPERATION OF THE INITIATING ELEMENT, MEANS FOR TERMINATING THE DELIVERY OF TORSIONAL IMPACTS TO THE SHAFT, SAID TERMINATING MEANS BEING OPERABLE AUTOMATICALLY IN RESPONSE TO THE MOVEMENT OF THE TIMING ELEMENT TO SAID PREDETERMINED OPERATING POSITION, AND MEANS FOR ADJUSTING THE DISTANCE BETWEEN THE IDLE POSITION AND THE OPERATING POSITION OF SAID TIMING ELEMENT WHEREBY TO REGULATE THE DURATION OF THE ROTATIONAL IMPACTS,