Coil tie spacer cone and pulling device for the removal thereof from concrete installations

Claim 1

THE COMBINATION WITH A FRUSTO-CONICAL SPACER MEMBER HAVING A CENTRAL BORE EXTENDING AXIALLY THERETHROUGH, THE END OF THE BORE ADJACENT THE SMALL BASE OF THE COME FRUSTUM BEING PROVIDED WITH A FIRST SERIES OF INTERNAL RIGHT HAND THREADS, ANOTHER PORTION OF THE BORE ADJACENT THE LARGE BASE OF THE CONE FRUSTUM BEING FORMED WITH A SERIES OF LEFT HAND THREADS, OF A CONE PULLER DEVICE FOR EXTRACTING SAID SPACER MEMBER FROM A POSITION OF EMBEDMENT IN A MASS A HARDENED CONCRETE WHEREIN SAID SERIES OF RIGHT HAND THREADS ARE THREADEDLY RECEIVED ON THE FREE CLOSELY WOUND CONVOLUTIONS OF A HOLLOW COIL TIE EMBEDDED IN SAID MASS, SAID CONE PULLER DEVICE COMPRISING AN ELONGATED PULL ROD HAVING A TORQUE APPLYING HANDLE AT ONE END THEREOF, THE OTHER END OF SAID PULL ROD BEING FORMED WITH A SERIES OF THREADS FOR MATING ENGAGEMENT WITH SAID SERIES OF LEFT HAND THREADS, AND MEANS ON SAID PULL ROD PROVIDING A SHOULDER TO LIMIT THE EXTENT OF THREADED RECEPTION OF THE PULL ROD BY SAID SERIES OF LEFT HAND THREADS, WHEREBY UPON CONTINUED TURNING MOVEMENT OF THE PULL ROD AFTER COMPLETE MATING ENGAGEMENT WITH SAID SERIES OF LEFT HAND THREADS, THE SPACER MEMBER WILL BE TURNED BODILY WITH THE PULL ROD TO INITIALLY LOOSEN THE SAME FROM THE SURROUNDING CONCRETE AND TO THEREAFTER CAUSE THE SAME TO BECOME UNTHREADED FROM SAID COIL TIE.