pittman

Claim 1

IN A PIPE SHOULDER FACING MACHINE, A TUBULAR CYLINDRICAL MANDREL HAVING A THREADED CONICAL TIP ON ITS FORWARD END ADAPTED TO BE THREADED INTO THE JOINT OF A PIPE, MEANS ON THE REAR END OF THE MANDREL FOR ROTATING THE TIP INTO AND OUT OF THE JOINT, A CUTTER ASSEMBLY COMPRISING A SLEEVE JOURNALED ON THE MANDREL BEHIND THE TIP AND HAVING A CONCENTRIC GEARWHEEL FIXED THEREON, RADIAL POST MEANS EXTENDING LATERALLY FROM THE SLEEVE, A LONGITUDINAL SUPPORT BAR EXTENDING SECURABLY THROUGH THE POST MEANS AND HAVING A HEAD ON ITS FORWARD END, A RADIALLY INWARDLY EXTENDING CUTTER MOUNTED ON SAID HEAD AND HAVING A BLADE ON ITS INWARD END, ADAPTED TO ENGAGE WITH THE END OF A PIPE, SAID MANDREL HAVING AN ANNULAR GROOVE BEHIND SAID TIP IN WHICH THE CUTTER BLADE IS POSITIONED, MEANS MOUNTED ON THE MANDREL BEHIND THE CUTTER ASSEMBLY SLEEVE FOR FEEDING THE ASSEMBLY FORWARDLY, A DRIVE ASSEMBLY HAVING A RELATIVELY STATIONARY MEMBER MOUNTED ON THE MANDREL BETWEEN THE CUTTER ASSEMBLY AND THE FEED MEANS, A DRIVE SHAFT JOURNALED ON THE MEMBER AND HAVING A PINION ENGAGEABLE WITH THE GEARWHEEL, SAID MEMBER COMPRISING A REAR SLEEVE SLIDABLY JOURNALED ON THE MANDREL AND HAVING A LATERALLY EXTENDING WEB CARRYING A BEARING THROUGH WHICH THE DRIVE SHAFT IS JOURNALED, SAID DRIVE SHAFT BEING SLIDABLE IN THE BEARING AND HAVING A FITTING THEREON PROVIDED WITH AN ANNULAR GROOVE, A LONGITUDINALLY MOVABLE SHIFT BAR MOUNTED ON THE WEB AND HAVING A LATERAL FINGER ENGAGED IN THE FITTING GROOVE, AND A CLUTCH LEVER PIVOTED INTERMEDIATE ITS ENDS ON THE WEB AND PIVOTED AT ITS INWARD END TO THE SHIFT BAR.