Apparatus for earth working

Claim 1

APPARATUS FOR EARTH-WORKING COMPRISING A FIRST GENERALLY RECTANGULAR FRAME, MEANS FOR CONNECTING SAID FRAME TO A PROPELLING VEHICLE FOR MAINTAINING SAID FRAME IN A SUBSTANTIALLY FIXED PLANAR POSITION, A PLURALITY OF EARTHWORKING IMPLEMENTS MOUNTED ON SAID FRAME, A SECOND GENERALLY RECTANGULAR FRAME LOCATED IN LONGITUDINAL ALIGNMENT WITH SAID FIRST FRAME, A PLURALITY OF EARTH-WORKING IMPLEMENTS MOUNTED ON SAID SECOND FRAME, QUADRANTFORMING MEMBERS HAVING FREE ENDS, SAID QUADRANT-FORMING MEMBERS HAVING PORTIONS EXTENDING DOWNWARDLY BELOW ONE FRAME, MULTIPLE TONGUES MOUNTED ON THE OTHER FRAME, EACH OF SAID TONGUES HAVING A BASE AND A FREE END WITH AN OPENING THERETHROUGH, PIVOT MEANS CONNECTING THE FREE ENDS OF SAID QUADRANT-FORMING MEMBERS TO THE BASE OF SAID TONGUES, EACH OF SAID MEMBERS HAVING A SERIES OF SPACED OPENINGS DISPOSED RADIALLY OF SAID PIVOTAL CONNECTION, THE OPENINGS OF SAID MEMBERS BEING ALIGNABLE WITH THE OPENING IN THE FREE END OF SAID TONGUES, AND PIN MEANS RECEIVABLE WITHIN SAID ALIGNED OPENINGS FOR MAINTAINING SAID FRAMES IN FIXED POSITION RELATIVE TO EACH OTHER, WHEREBY WHEN SAID FRAMES ARE CONNECTED SUBSTANTIALLY IN ALIGNMENT THE EARTH-WORKING IMPLEMENTS OF SAID FIRST AND SECOND FRAMES WILL PENETRATE THE EARTH SUBSTANTIALLY THE SAME AMOUNT AND WHEN SAID FRAMES ARE DISPOSED AT AN ANGLE TO EACH OTHER A PORTION OF THE WEIGHT OF ONE FRAME WILL BE TRANSFERRED TO THE OTHER FRAME TO CAUSE THE EARTH-WORKING IMPLEMENTS CARRIED BY EACH FRAME TO PENETRATE THE EARTH IN VARYING AMOUNTS.