Wire coil installing tool

Claim 1

A TOOL FOR INSERTING A WIRE COIL INSERT HAVING OUTER AND INNER SCREW THREAD FORMING PORTIONS OF CERTAIN PITCH AND INTERNAL PITCH DIAMETER, AND A DIAMETRICAL TANG EXTENDING AT ITS ROOT FROM THE TERMINAL END OF THE LAST CONVOLUTION OF SAID COIL INSERT AT THE LEADING END OF THE LATTER, COMPRISING: (A) AN ELONGATED TOOL BODY HAVING A DRIVING PORTION, A GENERALLY CYLINDRICAL INSERT SUPPORTING HEAD END PORTION, AND AN INTERVENING SHANK PORTION CONNECTING SAID INSERT SUPPORTING PORTION TO SAID DRIVING PORTION FOR TRANSFER FOR TORQUE FROM THE LATTER TO THE INSERT SUPPORTING PORTION ABOUT THE LONGITUDINAL AXIS OF THE LATTER, (B) MEANS MOUNTED TO SAID DRIVING PORTION TO APPLY TORQUE THERETO, (C) AN EXTERIOR MALE SCREW THREAD CARRIED BY SAID INSERT SUPPORTING PORTION OF A PITCH SUBSTANTIALLY EQUAL TO THAT OF THE INSERT AND OF A PITCH DIAMETER OF THE INABLY LESS THAN THE INTERNAL PITCH DIAMETER OF THE INSERT TO PERMIT CONTRACTION OF THE TURNS OF THE LATTER DURING TORQUE INSTALLATION THEREOF BY SAID TOOL IN AN INTERNALLY THREADED HOLE OF A WORKPIECE, (D) AT LEAST THE LEADING END OF SAID THREAD INSERT SUPPORTING PORTION BEING PROVIDED WITH A LONGITUDINAL HOLE TO DEFINE AN EXTERNALLY THREADED TUBULAR FLANGE TERMINATING IN A CIRCULAR EDGE, (E) SAID CIRCULAR EDGE BEING SPIRALLY ARRANGED ALONG AN APPRECIABLE EXTENT OF THE CREST OF THE LAST CONVOLUTION OF THE THREAD OF SAID FLANGE TO RIDE BENEATH THE TANG ROOT WHEN SAID INSERT IS SCREWED ONTO SAID THREADED INSERT SUPPORTING PORTION,AND (F) A LONGITUDINALLY-EXTENDING ABUTMENT SHOULDER FOR ENGAGEMENT BY THE TANG ROOT TO APPLY INSTALLATION TORQUE TO THE INSERT WHEN SUPPORTED ON SAID HEAD END PORTION, AND DEFINED BY AN AXIALLY LONGITUDINAL STEP IN SAID FLANGE CIRCULAR EDGE.