Aerating apparatus

Claim 1

IN APPARATUS FOR AERATING TURF HAVING A FRAME, THE INVENTION COMPRISING AN AXLE MOUNTED UPON SAID FRAME, AT LEAST FIRST AND SECOND SUBSTANTIALLY CYLINDRICAL DRUMS ROTATABLY MOUNTED IN SPACED RELATIONSHIP TO EACH OTHER UPON SAID AXLE FOR ROTATION RELATIVE TO SAID FRAME, EACH OF SAID DRUMS HAVING ONLY A SINGLE ROW OF TUBES WHICH EXTEND SUBSTANTIALLY RADIALLY FROM THE PERIPHERY THEREOF, INDIVIDUAL DEPTH LIMITING MEANS MOUNTED ON SAID DRUMS AND SPACED AROUND AND FROM THE PERIPHERY THEREOF, SAID TUBES EXTENDING RADIALLY BEYOND SAID DEPTH LIMITING MEANS, EACH DRUM BEING ROTATABLE INDEPENDENTLY OF THE OTHER DRUM, A PLATE-LIKE DISK INDEPENDENT OF SAID DRUMS ROTATABLY, MOUNTED DIRECTLY UPON SAID AXLE AND ROTATABLE RELATIVE TO SAID FRAME AND INDEPENDENTLY OF SAID DRUMS, SAID DISK BEING LOCATED BETWEEN SAID FIRST AND SECOND DRUMS, A SINGLE ROW OF SUBSTANTIALLY RADIALLY EXTENDING TUBES CARRIED BY SAID DISK, SAID TUBES OF SAID DRUMS AND SAID DISK BEING POSITIONED FOR PENETRATION OF SAID TURF AND THE OUTERMOST END OF SAID TUBE PENETRATING SAID TURF TO FORM AND REMOVE A PLUG OF TURF DURING ROTATION OF SAID DRUMS AND SAID DISK, SAID TUBES IN EACH ROW ON SAID DRUMS AND ON SAID DISK BEING SPACED APART A DISTANCE SUCH THAT AT ANY TIME ONLY ONE TUBE IN EACH ROW IS AT FULL PENETRATION IN THE TURF.