Sand mulling apparatus

Claim 1

AN APPARATUS ADAPTED TO TREAT MOLDING SAND OR LIKE GRANULAR MATERIAL AND COMPRISING A BOWL ADAPTED TO RECEIVE THEREIN A PREDETERMINED AMOUNT OF THE SAND TO BE TREATED AND INCLUDING A BOTTOM WALL AND AN UPSTANDING CONTINUOUS CYLINDRICAL SIDE WALL, AN ASSEMBLY MOUNTED FOR ROTATION WITHIN SAID BOWL ABOUT THE CENTRAL VERTICAL AXIS THEREOF AND ADAPTED TO BE DRIVEN IN ONE DIRECTION, SAID ASSEMBLY COMPOSING A COMPARATIVELY LARGE CENTRAL HUB PRESENTING A SMOOTH UPPER FACE THE PERIPHERAL RIM REGION OF WHICH IS CIRCULAR, EXTENDS SUBSTANTIALLY HORIZONTALLY, AND IS SPACED A COMPARATIVELY SMALL DISTANCE INWARDS OF THE BOWL SIDE WALL, THE UNDERNEATH SURFACE OF SAID HUB BEING FORMED WITH A SERIES OF GENERALLY RADIALLY DIVERGENT VANES THEREON, SAID VANES EXTENDING FROM THE CENTRAL REGION OF THE HUB TO THE OUTER PERIPHERAL REGION, SAID ASSEMBLY ADDITIONALLY COMPRISING A SCOOP-TYPE PLOW FIXEDLY MOUNTED ON THE HUB AND POSITIONED RADIALLY OUTWARDLY OF THE PERIPHERAL EDGE OF THE LATTER FOR ELEVATING PORTIONS OF THE SAND, MEANS FOR INTRODUCING AIR UNDER PRESSURE TO THE INTERIOR OF THE BOWL BENEATH SAID HUB AND AT SAID CENTRAL REGION FOR FORCIBLE CENTRIFUGAL DISTRIBUTION BY SAID VANES, AND POWER MEANS FOR ROTATING THE ASSEMBLY IN SAID ONE DIRECTION.