Angular adjusting means for a land clearing implement

Claim 1

AN IMPLEMENT INCLUDING A FRAME COMPRISING A TRANSVERSE SUPPORTING BEAM, A PAIR OF DRAFT ARMS, MEANS ADJUSTABLY CONNECTING SAID DRAFT ARMS TO SAID BEAM WHEREBY SAID ARMS MAY BE MOVED INWARDLY AND OUTWARDLY RELATIVE TO SAID BEAM, A PAIR OF LATERALLY SPACED SUPPORTING STRUCTURE CONNECTED TO SAID BEAM, EACH SAID STRUCTURE INCLUDING SPACED PLATE MEMBERS CONNECTED TOGETHER AND PROVIDING A VERTICAL SLOT, WITH STOPS AT HORIZONTALLY SPACED ENDS OF SAID SLOT, A PLOW BLADE DISPOSED BELOW SAID BEAM, A PAIR OF LATERALLY SPACED UPRIGHT LEGS CONNECTED TO SAID BLADE, MEANS PIVOTALLY CONNECTING SAID LEGS TO SAID SUPPORTING STRUCTURES BETWEEN SAID PLATE MEMBERS AND WITHIN SAID SLOT WHEREBY SAID BLADE MAY BE TILTED RELATIVE TO THE GROUND MEANS FOR PIVOTING SAID LEGS INCLUDING A PAIR OF FLUID EXTENSIBLE MEMBERS, MEANS PIVOTALY CONNECTING EACH EXTENSIBLE MEMBER TO EACH DRAFT ARM, EACH EXTENSIBLE MEMBER INCLUDING A CYLINDER, A PISTON AND RAM RECIPROCABLE WITHIN EACH CYLINDER, MEANS FOR DIRECTING FLUID UNDER PRESSURE TO SAID CYLINDER ON OPPOSITE SIDES OF SAID PISTON FOR MOVING THE SAME, AND MEANS PIVOTALLY CONNECTING SAID RAMS ABOVE SAID SLOT TO THE SAID LEGS, SAID STOPS LIMITING THE PIVOTAL MOVEMENT OF SAID LEGS.