Expanding device for plastic pipe

Claim 1

AN EXPANDING DEVICE OF THE CHARACTER DESCRIBED FOR EXPANDING THE END PORTION OF A PLASTIC PIPE TO FORM A BELLEND, THE DEVICE EMBODYING A CONICAL BODY THAT IS FLAT UPON ITS OPPOSITE ENDS, CYLINDRICAL GUIDE MEANS FOR SHIFTING THE CONICAL BODY IN A HORIZONTAL DIRECTION, THE CONICAL BODY BEING PROVIDED UPON ITS CIRCUMFERENTIAL SURFACE WITH A MULTIPLICITY OF EQUIDISTANTLY SPACED DOVETAIL GROOVES, EXPANDING BLADES HAVING A DOVETAIL UPON THEIR LOWER EDGES FOR RIDING ENGAGEMENT WITH RESPECT TO THE DOVETAIL SLOTS, THE SEVERAL BLADES BEING RADIAL, MEANS TO ENGAGE THE OPPOSITE ENDS OF THE BLADES TO MAINTAIN THE BLADES AGAINST SHIFTING LONGITUDINALLY AND WHEREBY THE CONICAL BODY MEMBER CAUSES THE BLADES TO MOVE OUTWARDLY TO AN EXPANDING POSITION WITH RESPECT TO THE PIPE, THE GUIDE MEANS INCLUDING A PAIR OF TELESCOPIC SLEEVES, A PLATE FIXED TO THE LARGE ENDS OF THE CONICAL BODY, A PISTON ROD CONNECTED TO THE PLATE AND A CYLINDER HAVING A PISTON THAT IS CONNECTED TO THE PISTON ROD AND THAT IS OPERABLE TO SHIFT THE CONIAL BODY TO AND FROM AN EXPNDING RELATION WITH RESPECT TO THE BLADES, CUPS FIXED TO ONE SLEEVE AT THE SMALLER END OF THE CONICAL BODY AND WITH THE CUP AT THE OPPOSITE END BEING CARRIED BY A MOUNTING BRACKET, THE EDGES OF THE CUPS ENGAGING THE OPPOSITE ENDS OF THE BLADES, TO MAINTAIN THE BLADES AGAINST SLIDING MOVEMENT DURING THE MOVEMENT OF THE CONICAL BODY, THE INNER SLEEVE HAVING AN AXIAL BORE THAT IS THREADED AT ONE END TO RECEIVE A THREADED BOLT, THE INNER SLEEVE AT ITS OPPOSITE END BEING MOUNTED WITHIN THE BORE OF A FIXED BRACKET AND WITH THE PISTON ROD PASSING THROUGH A BORE OF THE INNER SLEEVE TO BE CONNECTED TO THE PLATE.