Portable tool for machining conduit ends

Claim 1

A TOOL FOR MACHINING THE END OF A TUBULAR CONDUIT, SAID TOOL COMPRISING AN ELONGATE BODY; A CUTTER SUPPORT AT ONE END OF SAID BODY FOR ROTATABLY SUPPORTING A SHAFT ASSEMBLY IN LONGITUDINAL ALIGNMENT WITH SAID BODY, SAID CUTTER SUPPORT HAVING ONE END ADJACENT SAID ONE END OF SAID BODY AND ANOTHER END BETWEEN SAID BODY ENDS; A CUTTER ADVANCING SLEEVE THREADABLY ENGAGED WITH AND JOURNALED WITHIN SAID CUTTER SUPPORT AND PROJECTING BEYOND SAID ONE END OF SAID SUPPORT TO PROVIDE MEANS FOR IMPARTING ROTATION TO SAID SLEEVE, SAID ADVANCING SLEEVE FURTHER INCLUDING A PERIPHERALLY THREADED PORTION DISPOSED INTERMEDIATE ITS ENDS FOR ENGAGEMENT WITH AN INTERNALLY THREADED PORTION OF SAID CUTTER SUPPORT AND SAID ADVANCING SLEEVE BEING SEALINGLY SUPPORTED WITHIN SAID SUPPORT BY BUSHING MEANS DISPOSED BETWEEN SAID ADVANCING SLEEVE AND SAID SUPPORT AT EACH END OF SAID SUPPORT; A SHAFT ASSEMBLY PROJECTING FROM OPPOSITE ENDS OF AND ROTATABLY CARRIED BY SAID ADVANCING SLEEVE, SAID ASSEMBLY INCLUDING A SHAFT COAXIAL WITH SAID SLEEVE AND JOURNALED THEREWITHIN, A DRIVE SPINDLE COAXIAL WITH AND CARRIED BY THE END OF SAID SHAFT AT THE PROJECTING END OF SAID ADVANCING SLEEVE, AND A CUTTER BLADE SUPPORTING HEAD CARRIED BY THE OTHER END OF SAID SHAFT; A CONDUIT SUPPORT AT THE OPPOSITE END OF SAID BODY, SAID CONDUIT SUPPORT HAVING A CONCAVE SEAT THE WIDTH OF WHICH CORRESPONDS SUBSTANTIALLY TO THE OUTER DIAMETER OF SAID CONDUIT END AND WHICH IS POSITIONED TO SUPPORT SAID CONDUIT END IN AXIAL ALIGNMENT WITH AND FACING SAID SHAFT ASSEMBLY, SAID SUPPORT FURTHER HAVING OUTER SIDES SPACED A DISTANCE CORRESPONDING SUBSTANTIALLY TO THE