Tool for the installation of thin walled inserts

Claim 1

A COMBINED DRIVING AND LOCKING TOOL FOR A HOLLOW INSERT HAVING EXTERNAL THREADS AND INTERNAL DRIVING GROOVES, AND A COUNTERBORE AT THE UPPER END OF THE INSERT, PROVIDING A THIN DEFORMABLE WALL PORTION, SAID TOOL COMPRISING A PILOT ELEMENT AT ONE END THEREOF ENGAGEABLE WITH SAID DRIVING GROOVES AND ADAPTED TO ROTATE SAID INSERT INTO A BORE, A SHOULDER LONGITUDINALLY SPACED FROM SAID PILOT ELEMENT HAVING AN OUTSIDE DIAMETER OF A DIMENSION LYING BETWEEN THAT OF THE INSIDE DIAMETER OF THE COUNTERBORE AND THE OUTSIDE DIAMETER OF THE INSERT, SAID TOOL HAVING A FLEXIBLE PORTION SPACED LONGITUDINALLY A PREDETERMINED DISTANCE FROM SAID SHOULDER LESS THAN THE DEPTH OF THE COUNTERBORE, AN ENLARGEMENT AT THE OTHER END OF THE TOOL, SAID ENLARGEMENT BEING PROVIDED WITH MEANS ENGAGEABLE BY A WRENCH FOR ROTATING THE TOOL TO DRIVE THE INSERT INTO A BORE, SAID ENLARGEMENT BEING ADAPTED TO BE STRUCK BY A HAMMER TO CAUSE SAID SHOULDERS TO APPLY AXIAL FORCE TO THE COUNTERBORED PORTION OF THE INSERT TO BUCKLE IT OUTWARDLY TO LOCK THE INSERT IN SAID BORE.