Earth opening device

Claim 1

A FURROWING AND EARTH MARKING APPARATUS FOR FORMING FURROWS IN THE TOP OF AN EARTH RIDGE TO PREPARE A BED FOR PLANTS COMPRISING A HORIZONTAL AXLE EXTENDING TRANSVERSELY OF THE APPARATUS, A FIRST AND A SECOND DISK EACH HAVING A CURVED FACE AND A SUBSTANTIALLY FLAT FACE, SAID DISKS BEING ROTATABLY MOUNTED ON THE AXLE SO AS TO BE LOCALLY PERPENDICULAR THERETO AND SO THAT THE FLAT FACES OF THE DISKS OPEN ONTO EACH OTHER, A DRAW BAR SPACED FROM AND SUBSTANTIALLY PARALLEL TO THE AXLE, A PAIR OF PARALLEL MEMBERS EACH AFFIXED TO THE DRAW BAR AT ONE OF THEIR ENDS AND MOUNTING THE AXLE ENDS AT THEIR OTHER ENDS, AXLE BOWING MEANS CONNECTED BETWEEN THE DRAW BAR AND THE CENTRAL PORTION OF THE AXLE AND SELECTIVELY OPERABLE TO BOW THE AXLE REARWARDLY OF THE ENDS OF THE AXLE TO TOE-IN THE DISKS, AND AN EARTH MARKING WHEEL HAVING PERIPHERAL PROJECTIONS THEREON PIVOTALLY LINKED TO THE AXLE BETWEEN THE DISKS, WHEREBY THE DISKS ENGAGE AND DISENGAGE THE UPPER SURFACE OF THE RIDGE TO PROVIDE FURROWS FOR BEDDING PLANTS WITHOUT DISTURBING THE PROFILE OF THE PREPARED RIDGE, AND THE PROJECTIONS MARK THE EARTH BETWEEN THE FURROWS TO INDICATE PARTICULAR BEDDING LOCATIONS FOR THE PLANTS.