Swaging tool for forming joints

Claim 1

A SWAGING TOOL FOR JOINING A FITTING HAVING A RECESS ON THE INNER WALL THEREOF ONTO A TUBING TO FORM A HIGH PRESSURE SEAL ASSEMBLY COMPRISING: A DRAW MANDREL HAVING A NOSE PORTION WHOSE DIAMETER IS EQUAL TO THE INSIDE DIAMETER OF SAID TUBING AND A SHAFT PORTION OF A REDUCED DIAMETER; A SLEEVE FORMED OF A RESILIENT MATERIAL AND POSITIONED ON THE SHAFT PORTION OF SAID MANDREL SUCH THAT ONE END OF HTE SLEEVE ABUTS AGAINST SAID NOSE PORTION; A SPACER POSITIONED SO AS TO SLIDABLY SUPPORT SAID MANDREL, SAID MANDREL ADAPTED TO BE INSERTED INTO THE END OF THE TUBING HAVING THE FITTING THEREON WITH THE SURFACE OF SAID SPACER ADAPTED TO ABUT AGAINST THE OTHER END OF THE SLEEVE, RETAINING MEANS ADAPTED TO ENCIRCLE SAID FITTING FOR FULLY SUPPORTING THE OUTER SURFACE OF SAID FITTING RADIALLY OPPOSITE THE INNER SURFACE THEREOF PROVIDED WITH SAID RECESS; HYDRAULIC MEANS FOR BUILDING UP A HYDRAULIC FORCE FOR AXIALLY MOVING SAID MANDREL RELATIVE TO SAID SPACER TO CAUSE SAID SLEEVE TO EXPAND RADIALLY OUTWARDLY TO THEREBY SWAGE THE WALL OF SAID TUBING TO CONFORM TO THE INNER WALL OF SAID FITTING; AND A PRESSURE GAUGE FOR INDICATING WHEN SAID HYDRAULIC FORCE HAS REACHED A PREDETERMINED VALUE SO AS TO FORM A BINDING PRESSURE-TIGHT CONNECTION BETWEEN THE WALLS OF SAID TUBING AND SAID FITTING.