Safety release for pneumatic split rim tire mount

Claim 1

IN A SPLIT RIM TIRE MOUNT OF THE TYPE INCLUDING ONE HALF RIM FIXED ON A ROTARY SPINDLE HAVING AN AXIAL PASSAGE COMMUNICATING A SOURCE OF AIR SUPPLIED UNDER PRESSURE WITH A TIRE MOUNTED ON SUCH SPLIT RIM TIRE MOUNT AND HAVING ANOTHER HALF RIM MOUNTED ON ONE END OF A TUBULAR SHAFT AXIALLY SHIFTABLE WITHIN SUCH ROTARY SPINDLE, THE TUBULAR SHAFT HAVING A PISTON SECURED TO ITS OPPOSITE END DISPOSED IN A CYLINDER MOUNTED ON SAID SPINDLE IN COMMUNICATION WITH THE AIR PASSAGE THEREIN FOR URGING SAID PISTON IN A DIRECTION TO SHIFT SUCH MOVABLE HALF RIM TOWARD THE FIXED HALF RIM UNDER THE INFLUENCE OF THE AIR PRESSURE WITHIN SAID PASSAGE; A SAFETY RELEASE MECHANISM COMPRISING A ROD MOUNTED WITHIN THE TUBULAR SHAFT FOR MOVEMENT THEREWITH AND AXIALLY THEREOF, A VALVE SEAT IN THE PISTON ENGAGEABLE BY ONE END OF SAID ROD, YIELDABLE MEANS BETWEEN THE TUBULAR SHAFT AND SAID ROD FOR URGING SAID ONE END OF SAID ROD AGAINST SAID VALUE SEAT FOR NORMALLY CLOSING THE SAME, A WHEEL RETAINER MOUNTED ON THE OPPOSITE END OF THE TUBULAR SHAFT HAVING A CENTRAL BORE CONFINING THE OPPOSITE END OF SAID ROD, QUADRANTAL SLOTS FORMED IN SAID WHEEL RETAINER TO A DEPTH SPACED OUTWARDLY FROM MOVABLE HALF RIM ON THE TUBULAR SHAFT, A SAFETY RING HAVING QUADRANTAL SPOKES ARRANGED IN SAID QUADRANTAL SLOTS AND HAVING A CENTRAL HUB ARRANGED IN THE CENTRAL BORE OF SAID WHEEL RETAINER AND SLIDABLY ARRANGED ON THE SAID OPPOSITE END OF SAID ROD, A CAP NUT ON THE EXTREME END OF SAID WHEEL RETAINER LIMITING OUTWARD MOVEMENT OF SAID