Threaded element installing tool

Claim 1

A TOOL FOR SCREWING A THREADED ELEMENT INTO A CARRIER PART INCLUDING A FIRST SECTION ADAPTED TO BE TURNED ABOUT AN AXIS, MEANS CARRIED BY SAID FIRST SECTION HAVING THREADS FOR THREADEDLY ENGAGING SAID ELEMENT IN DRIVING RELATION, A SECOND SECTION MOUNTED FOR ROTATION WITH SAID FIRST SECTION AND FOR LIMITED ROTARY MOTION RELATIVE THERETO ABOUT SAID AXIS, MEANS FORMING A SHOULDER FOR ENGAGING AXIALLY INWARDLY AGAINST SAID ELEMENT AND TRANSMITTING AXIALLY INWARD FORCE FROM SAID SECOND SECTION TO SAID ELEMENT, A SET OF FIRST TEETH ON SAID FIRST SECTION PROJECTING AXIALLY INWARDLY AND SPACED CIRCULARLY APART ABOUT SAID AXIS, AND A SET OF SECOND TEETH ON SAID SECOND SECTION PROJECTING AXIALLY OUTWARDLY TOWARD AND ENGAGING SAID FIRST TEETH AND SPACED CIRCULARLY APART ABOUT SAID AXIS, AT LEAST SOME OF THE INDIVIDUAL TEETH HAVING CAMMING SURFACES WHICH ARE INCLINED TO ADVANCE CIRCULARLY AS THEY ADVANCE AXIALLY AND WHICH ENGAGE OTHERS OF THE TEETH IN A RELATION CAMMING SAID SECOND SECTION AXIALLY TOWARD AND AGAINST SAID ELEMENT IN RESPONSE TO RELATIVE ROTATION OF THE FIRST SECTION IN A DIRECTION TO ADVANCE SAID ELEMENT INTO THE CARRIER PART, WHEREBY UPON ROTATION OF SAID FIRST SECTION IN A REVERSE UNSCREWING DIRECTION SAID INCLINED CAMMING SURFACES RELEASE SAID SECOND SECTION AND SHOULDER FOR AXIAL RETRACTING MOVEMENT RELATIVE TO THE FIRST SECTION.