Non-spilling feed means for vertical centrifuge

Claim 1

A CENTRIFUGE COMPRISING A CENTRIFUGE BOWL HAVING VERTICAL AXIS OF ROTATION AND A CENTRAL OPENING IN ITS LOWER END, A FEED MIXTURE TUBE EXTENDING UPWARD INTO THE OPENING AND PRESENTING INSIDE THE BOWL AN UPWARDLY FACING OPEN END DEFINED BY A PERIPHERAL RIM, FEED MIXTURE ACCELERATOR MEANS MOUNTED INSIDE THE BOWL FOR ROTATION RELATIVE TO THE RIM, THE ACCELERATOR MEANS COMPRISING AT LEAST ONE ACCELERATOR VANE HAVING SIDES EXTENDING FROM ABOVE THE LEVEL OF THE RIM SUBSTANTIALLY VERTICALLY DOWNWARD INTO THE RIM TO CAUSE ROTATION OF THE FEED MIXTURE IN THE UPPER END OF THE FEED MIXTURE TUBE AND CONSEQUENT OUTWARD PROJECTION OF FEED MIXTURE FROM THE RIM OF THE FEED MIXTURE TUBE INTO THE BOWL, AND TO THEREBY PREVENT SPILLING OF FEED MIXTURE DOWN THE OUTSIDE OF THE TUBE WHEN THE FEED PRESSURE DROPS.