Portable crushing plant

Claim 1

IN A CRUSHING PLANT; AN ELONGATED FRAME HAVING FRONT AND REAR PORTIONS; PRIMARY AND SECONDARY CRUSHERS CARRIED BY THE FRAME AT THE REAR AND FRONT PORTIONS THEREOF, RESPECTIVELY, EACH OF SAID CRUSHERS HAVING AN INLET AND AN OUTLET; FEED MEANS ON THE REAR OF THE FRAME FOR FEEDING MATERIALS TO BE CRUSHED INTO THE INLET OF THE PRIMARY CRUSHER; ELONGATED FRONT AND REAR VIBRATORY UNITS CARRIED BY THE FRAME IN MATERIAL RECEIVING RELATION TO THE OUTLETS OF SAID FRONT AND REAR CRUSHERS, RESPECTIVELY, SAID VIBRATORY UNITS EXTENDING LONGITUDINALLY OF THE FRAME TOWARD ONE ANOTHER AND HAVING DISCHARGING ENDS ADJACENT TO ONE ANOTHER AND TO A COMMON DELIVERY ZONE INTERMEDIATE THE CRUSHERS, EACH OF SAID VIBRATORY UNITS HAVING MATERIAL SUPPORTING ELEMENTS FOR VIBRATORILY ADVANCING MATERIALS AT A PLURALITY OF LEVELS BUT IN THE SAME DIRECTION TOWARD ITS DISCHARGING END, THE UPPER ONE OF SAID ELEMENTS OF EACH VIBRATORY UNIT COMPRISING A SCREEN, AND A LOWER ONE OF SAID ELEMENTS BEING ADAPTED TO RECEIVE SCALPED MATERIALS THAT PASS THROUGH SAID SCREEN AND TO CONDUCT SCALPED MATERIALS OF FINISHED SIZE TO SAID DELIVERY ZONE; AND CONVEYOR MEANS MOUNTED ON THE FRAME IN POSITION TO RECEIVE CARRY-OVER MATERIAL FROM SAID SCREENS OF BOTH VIBRATORY UNITS, AND ADAPTED TO CONDUCT SUCH CARRY-OVER MATERIAL TO THE INLET OF THE SECONDARY CRUSHER.