Combination piledriver and drivable threaded pipe sections

Claim 1

IN A TOOL JOINT FOR CONNECTING PIPE SECTIONS TOGETHER: A BOX MEMBER PROVIDED WITH AN INTEENAL TAPERED THREAD OF GENERALLY TRAPEZOIDAL FORM; A PIN MEMBER PROVIDED WITH AN EXTERNAL TAPERED THREAD OF GENERALLY TRAPEZOIDAL FORM COMPANION TO AND ADAPTED TO MESH WITH SAID INTERNAL TAPERED THREAD; SAID PIN MEMBER HAVING A DRIVE SHOULDER ENGAGING THE OUTER END OF SAID BOX MEMBER WHEN SAID PIN MEMBER IS FULLY TIGHTENED WITHIN SAID BOX MEMBER, SAID SHOULDER AND END BEING NORMAL TO THE COMMON AXIS OF SAID PIN MEMBER AND BOX MEMBER; SAID PIN MEMBER THREAD HAVING A DRIVE FACE NORMAL TO THE AXIS OF SAID PIN MEMBER, A BACK FACE INCLINED TOSAID DRIVE FACE AND A FLAT CREST BETWEEN SAID FACES SUBSTANTIALLY PARALLEL TO SAID PIN MEMBER AXIS; SAID BOX MEMBER THREAD HAVING A DRIVE FACE NORMAL TO THE AXIS OF SAID BOX MEMBER, A BACK FACE INCLINED TO SAID DRIVE FACE OF SAID BOX MEMBER AND A FLAT CREST BETWEEN SAID FACES OF SAID BOX MEMBER SUBSTANTIALLY PARALLEL TO SAID BOX AXIS; SAID DRIVE FACES ENGAGING EACH OTHER WHEN SAID PIN MEMBER SHOULDER AND THE BOX MEMBER END ENGAGE EACH OTHER, SAID INCLINED BACK FACES BEING FREE FROM CONTACT WITH EACH OTHER WHEN SAID PIN MEMBER SHOULDER AND BOX MEMBER END ARE COENGAGED; THE CREST OF SAID PIN MEMBER THREAD AND BOX MEMBER THREAD HAVING CLEARANCE WITH THE ROOTS OF SAID BOX MEMBER THREAD AND PIN MEMBER THREAD, RESPECTIVELY.