Vibratory cutter means for mining machines

Claim 1

IN A MINING MACHINE, A FRAME, A CUTTER SUPPORT MOVABLE RELATIVE TO SAID FRAME, A CUTTER, A SLIDABLE GUIDING CONNECTION BETWEEN SAID CUTTER AND SAID CUTTER SUPPORT ACCOMMODATING MOVEMENT OF SAID CUTTER ALONG SAID CUTTER SUPPORT IN FORWARD AND RETURN DIRECTIONS, A HYDRAULIC CYLINDER AND PISTON CONNECTED BETWEEN SAID CUTTER SUPPORT AND CUTTER AND BALANCED IN ACCORDANCE WITH THE FORCES OF NORMAL CUTTING ON SAID CUTTER TO RETAIN SAID CUTTER IN FORWARDLY EXTENDED RELATION WITH RESPECT TO SAID CUTTER SUPPORT, AND MEANS FOR SUPPLYING A MOVING COLUMN OF LIQUID UNDER PRESSURE THROUGH SAID CYLINDER AND ALONG THE PRESSURE SIDE OF SAID PISTON, GREATER THAN THE FORCES OF NORMAL CUTTING, COMPRISING A POWER DRIVEN PUMP HAVING LIQUID CONNECTION WITH THE OPPOSITE END OF SAID CYLINDER FROM SAID CUTTER SUPPORT AND CUTTER, A RETURN LIQUID CONNECTION LEADING FROM SAID CYLINDER AND ACCOMMODATING THE FLOW OF A MOVING COLUMN OF LIQUID THROUGH SAID CYLINDER, AND A VALVE IN SAID RETURN LIQUID CONNECTION AND RECIPROCABLY DRIVEN TO INTERMITTENTLY BLOCK THE MOVING COLUMN OF LIQUID FLOWING THROUGH SAID CYLINDER, AND TO THEREBY CREATE WATER-HAMMER-LIKE PULSATING FORCES ON SAID PISTON AND CUTTER.