Tire changing tool

Claim 1

A TIRE TOOL AS FOR MOUNTING A PNEUMATIC TIRE CASING ON A WHEEL SUPPORTED ON A RELATIVELY FIXED SUPPORTING DEVICE TO HAVE AT LEAST ONE OUTWARDLY CURVING PERIPHERAL FLANGE OF THE RIM TERMINATING IN AN AXIALLY OUTWARDLY PRESENTED PERIPHERAL EDGE, COMPRISING A TIRE BEAD-ENGAGING ELEMENT HAVING LEADING AND TRAILING ENDS AND AXIALLY OPPOSED TOP AND BOTTOM SIDES, SAID BOTTOM SIDE ADAPTED TO BE IN SLIDING ENGAGEMENT WITH SAID PHERIPHERAL EDGE OF THE RIM, SAID TOP SIDE HAVING AN AXIALLY OUTWARDLY PRESENTED GUIDE FACE EXTENDING TO A RADIALLY OUTWARDLY PRESENTED OUTER PORTION WHICH IS SUBSTANTIALLY COEXTENSIVE WITH THE ENGAGED PORTION OF SAID PERIPHERAL EDGE OF THE RIM, SAID ELEMENT HAVING ON THE TOP SIDE THEREOF A WALL PROVIDING A RADIALLY OUTWARDLY PRESENTED BEAD-URGING FACE GENERALLY AT A DIHEDRAL ANGLE TO SAID GUIDE FACE OF SAID ELEMENT, SAID BEAD-URGING FACE BEING FORWARDLY DIVERGENT WITH RESPECT TO SAID OUTER PORTION FROM A POINT ADJACENT THE TRAILING END OF THE ELEMENT TO A LEADING PORTION OF THE SAME OF SUBSTANTIAL BREADTH, SAID ELEMENT HAVING A DOWNTURNED ANGULAR EXTENSION FROM SAID OUTER PORTION ADAPTED TO CONFORM TO THE RADIALLY OUTWARDLY PRESENTED PERIPHERAL PORTIONS OF THE RIM FLANGE AND TENDING TO LIMIT RADIALLY INWARD MOVEMENT OF THE ELEMENT UPON YIELDING ENGAGEMENT OF THE TIRE BEAD WITH SAID BEAD-URGING FACE, AND TURNING MEANS ON SAID ELEMENT FOR SLIDING THE SAME AROUND SAID PERIPHERAL EDGE OF THE RIM, SAID DOWNTURNED ANGULAR EXTENSION BEING CONCAVO-CONVEX WITH THE CONVEX SIDE AS A SMOOTHLY ROUNDED CONTINUATION OF SAID GUIDE FACE, SAID CONCAVOCONVEX EXTENSION BEING ADAPTED TO CONFORM RADIALLY INWARDLY TO SAID CURVING PERIPHERAL FLANGE AND THE EXTENSION ALSO INCLUDING A ROUNDED TERMINAL END PRESENTED FORWARDLY OF SAID LEADING END OF THE ELEMENT AND TO BE INTURNED TO A SUBSTANTIAL EXTENT WITH RESPECT TO SAID PERIPHERAL EDGE OF THE RIM FLANGE.