Tools for installing threaded elements

Claim 1

A TOOL FOR SCREWING A THREADED ELEMENT INTO A BORE, COMPRISING A FIRST SECTION ADAPTED TO BE TURNED ABOUT A PREDETERMINED AXIS, MEANS MOUNTED TO TURN WITH SAID FIRST SECTION AND HAVING THREADS FOR ENGAGING AND HOLDING SAID ELEMENT, A SECOND SECTION ADAPTED TO TURN WITH AND RELATIVE TO SAID FIRST SECTION ABOUT SAID AXIS, MEANS FORMING A SHOULDER POSITIONED TO BE PRESSED AXIALLY INWARDLY AGAINST SAID ELEMENT BY SAID SECOND SECTION, A PLURALITY OF ROLLING MEMBERS AT DIFFERENT LOCATIONS ABOUT SAID AXIS FOR TRANSMITING AXIALLY INWARD FORCES FROM SAID FIRST SECTION TO THE SECOND SECTION, AND MEANS FORMING, IN ENGAGEMENT WITH EACH ROLLING MEMBER, A FIRST SURFACE THROUGH WHICH AXIAL LOAD FORCES ARE TRANSMITTED FROM SAID FIRST SECTION TO SAID MEMBER AND AN OPPOSED SECOND SURFACE THROUGH WHICH SAID FORCES ARE TRANSMITTED TO SAID SECOND SECTION, EACH ROLLING MEMBER BEING FREE FOR MOVEMENT RADIALLY OF SAID AXIS BETWEEN SAID TWO SURFACES ENGAGED THEREBY, SAID TWO SURFACES BEING SHAPED TO GRADUALLY ADVANCE AXIALLY APART RELATIVE TO ONE ANOTHER AS THE SURFACES ADVANCE IN ONE RADIAL DIRECTION.