Mold and core blowing machine

Claim 1

IN A MOLD BLOWING MACHINE HAVING A SAND RESERVOIR WITH AN OPENING FOR CHARGING WITH SAND, MEANS FOR CLOSING SUCH OPENING, A BLOW VALVE OPERATIVE TO ADMIT HIGH PRESSURE AIR TO SAID RESERVOIR, AN EXHAUST VALVE OPERATIVE TO RELIEVE THE PRESSURE IN SAID RESERVOIR, A BLOW HOLE THROUGH WHICH SAND IS DISCHARGED FROM SAID RESERVOIR BY SUCH HIGH PRESSURE AIR, AND CLAMP MEANS OPERATIVE TO CLAMP A MOLD BOX OR THE LIKE FIRMLY IN POSITION TO RECEIVE SAND DISCHARGED THROUGH SUCH BLOW HOLE; SAID CLAMP MEANS INCLUDING A PAIR OF PIVOTALLY MOUNTED FLUID PRESSURE OPERATED PISTON-CYLINDER ASSEMBLIES, A CRADLE SUPPORT ASSEMBLY FOR SAID MOLD BOX PIVOTALLY MOUNTED ON THE ROD ENDS OF SAID PISTON CYLINDER ASSEMBLIES ABOUT A COMMON HORIZONTAL PIVOT AXIS, EACH SAID CRADLE PIVOT BEING CONFINED IN A CAM SLOT MEANS SECURED TO SAID CRADLE AND REBENT PORTIONS, SLOT MEANS SECURED TO SAID CRADLE AND EXTENDING FROM SUCH HORIZONTAL PIVOT AXIS GENERALLY PARALLEL TO SAID CAM SLOTS, A PIVOT ON SAID MACHINE ADJACENT SAID REBENT PORTION OF SAID CAM SLOTS AND ENGAGED IN SAID SLOT MEANS SECURED TO SAID CRADLE, WHEREBY VERTICAL MOVEMENT OF SAID CRADLE BY SAID PISTON-CYLINDER ASSEMBLIES WILL CAUSE SAID CRADLE TO ROTATE ABOUT SUCH HORIZONTAL PIVOT AXIS AS SUCH AXIS MOVES THROUGH THE REBENT PORTION OF SAID CAM SLOTS THEREBY TO FACILITATE THE WITHDRAWAL OF A MOLD FROM SUCH MOLD BOX.