Shaft kiln discharge mechanism

Claim 1

IN A SHAFT KILN FOR BURNING REFRACTORY MATERIALS HAVING A VERTICAL COLUMN WHEREIN SAID MATERIALS ARE BURNED, SAID SHAFT KILN HAVING A FEED END AT THE TOP OF THE COLUMN AND A DISCHARGE END AT THE BASE OF THE COLUMN ENCLOSED IN A COLLECTING CHAMBER, A DISCHARGE MECHANISM WITHIN SAID COLLECTING CHAMBER COMPRISING A TABLE WITH RECTANGULAR TOP LARGER THAN THE OPENING AT THE BASE OF THE COLUMN PERPENDICULAR TO SAID VERTICAL COLUMN TO SUPPORT SAID MATERIALS IN THE COLUMN INSIDE SAID CONNECTING CHAMBER, A HOLLOW DRAG BAR WHICH RECIPROCATES ACROSS SAID TABLE HAVING AN ORIFICE ON EACH END, A GUIDE TRACT AT EACH END OF SAID DRAG BAR SLIDABLY ATTACHED TO SAID DRAG BAR TO STABILIZE IT DURING ITS RECIPROCATING MOTION, A PAIR OF HOLLOW PUSH RODS ATTACHED AT ONE END TO SAID DRAG BAR AND HAVING A COUPLING AT THE OPPOSITE END AND HAVING ORIFICES AT EACH END, A PAIR OF HYDRAULIC CYLINDERS AND PISTONS PROVIDE RECIPROCATING MOTION ACROSS THE WIDTH OF THE COLUMN AT THE DISCHARGE END OF THE SHAFT KILN TO SAID HOLLOW PUSH RODS, THERE BEING ATTACHED BY SAID COUPLINGS TO SAID PUSH RODS, A COOLING LIQUID SUPPLY, A PAIR OF FLEXIBLE HOSES CONNECTING THE ORIFICES ON SAID DRAG BAR TO THE ORIFICES ON SAID PUSH RODS, ANOTHER PAIR OF FLEXIBLE HOSES CONNECTING THE ORIFICES ON THE COUPLING END OF SAID PUSH RODS AND SAID COOLING LIQUID SUPPLY.