Tire changing machine

Claim 1

A TIRE CHANGING MACHINE ADAPTED TO ASSIST IN THE REMOVAL OF A TIRE CASING FROM AND ITS MOUNTING ON A WHEEL RIM OF THE TYPE INCLUDING A SPLIT LOCK RING, SAID MACHINE COMPRISING A BASE, UPSTANDING SUPPORT MEANS ON SAID BASE DEFINING AN UPSTANDING CENTER AXIS AND INCLUDING MEANS ADAPTED TO SUPPORT A WHEEL RIM IN AN ELEVATED HORIZONTALLY DISPOSED POSITION ABOVE SAID BASE, A PRESSURE HEAD, MEANS MOUNTING SAID PRESSURE HEAD FROM SAID BASE ABOVE SAID SUPPORT MEANS FOR GUIDED MOVEMENT TOWARD AND AWAY FROM SAID SUPPROT MEANS, MOTOR MEANS OPERATIVELY CONNECTED BETWEEN SAID BASE AND SAID PRESSURE HEAD FOR RAISING AND LOWERING THE LATTER, DEPENDING PRESSURE LEG MEMBERS CARRIED BY SAID PRESSURE HEAD AND INCLUDING FOOT PORTIONS ADAPTED TO ENGAGE THE UPPER SIDE WALL OF A TIRE CASING DISPOSED ON A WHEEL RIM SUPPORTED FROM SAID SUPPORT MEANS AT POINTS SPACED CIRCUMFERENTIALLY ABOUT SAID SIDE WALL FOR URGING THE LATTER DOWNWARDLY RELATIVE TO SAID RIM UPON THE LOWERING OF SAID PRESSURE HEAD RELATIVE TO SAID SUPPORT MEANS A PLURALITY OF DEPENDING ELONGATED LONGITUDINALLY EXTENDABLE LEG ELEMENTS SUPPORTED FROM SAID BASE ABOVE SAID UPSTANDING SUPPORT MEANS AND INCLUDING LOWER END PORTIONS ADAPTED TO ENGAGE SAID UPPER SIDE WALL AFTER THE LATTER HAS BEEN DEPRESSED BY SAID LEG MEMBERS AND TO MAINTAIN SAID SIDE WALL IN A DEPRESSED CONDITION AS SAID PRESSURE HEAD IS RAISED RELATIVE TO SAID BASE, SAID LEG ELEMENTS AND SAID BASE INCLUDING COACTING MEANS PIVOTALLY SECURING THE UPPER ENDS OF SAID LEG ELEMENTS TO SAID BASE FOR ROTATION ABOUT HORIZONTAL AXES DISPOSED AT GENERALLY RIGHT ANGLES TO SAID CENTER AXIS, SAID PRESSURE HEAD ALSO INCLUDING DEPENDING LIFT ARMS INCLUDING LOWER END PORTIONS ADAPTED TO RELEASABLY ENGAGE AND LIFT SAID RIM AS SAID PRESSURE HEAD IS RAISED WHILE SAID LEG ELEMENTS HOLD SAID SIDE WALL IN SAID DEPRESSED CONDITION.