Tractor-mounted folding drag hitch

Claim 1

A FOLDING DRAG HITCH FOR USE IN COMBINATION WITH A TRACTOR, SAID HITCH COMPRISING: (A) A CENTRAL FRAME SECTION HAVING AN ELONGATED GENERALLY HORIZONTAL ROCKSHAFT FOR SUPPORTING AN IMPLEMENT, (B) A PAIR OF SIDE FRAME SECTIONS EACH HAVING AN ELONGATED GENERALLY HORIZONTAL ROCKSHAFT FOR SUPPORTING IMPLEMENTS, SAID SIDE FRAME SECTIONS BEING PIVOTALLY CONNECTED IN OPPOSITE GENERALLY SIDE-BY-SIDE ALIGNMENT IN OPERATING POSITION WITH EACH ONE ON A DIFFERENT SIDE OS SAID CENTRAL FRAME SECTION, (C) A PAIR OF UNIVERSAL JOINTS CONNECTING THE OPPOSITE OUTER ENDS OF THE ROCKSHAFT OF THE CENTRAL FRAME SECTION OF THE INNER ENDS FO THE ROCKSHAFTS OF THE SIDE FRAME SECTIONS FOR UNIVERSAL COOPERATIVE ROCKING MOVEMENTS, (D) ACTUATING MEANS CONNECTED TO THE ROCKSHAFT OF SAID CENTRAL FRAME SECTION FOR ROTARY MOVEMENT OF SAID ROCKSHAFTS BETWEEN A FIRST POSITION WHEREIN THE IMPLEMENTS CARRIED THEREBY ARE DISPOSED IN A LOWER GROUND-WORKING CONDITION AND A SECOND POSITION WHEREIN SAID IMPLEMENTS ARE DISPOSED IN A GENERALLY ANGULARLY UPWARDLY EXTENDING INOPERATIVE CONDITION, SAID ACTUATING MEANS COMPRISING: (1) A FLUID PRESSURE OPERATED CYLINDER SECURED TO SAID CENTRAL FRAME SECTION, (2) A RADIALLY EXTENDING CRANK ARM SECURED TO THE ROCKSHAFT OF SAID CENTRAL FRAME SECTION, AND (3) AN EXTENSIBLE AND RETRACTABLE PISTON ROD COOPERATING WITH SAID CYLINDER AND SECURED TO SAID CRANK ARM, AND (E) LINKAGE MEANS CONNECTED TO EACH OF THE SIDE FRAME SECTIONS AND RESPONSIVE TO SAID ACTUATING MEANS FOR CAUSING SWINGING MOVEMENTS OF SAID SIDE FRAME SECTIONS ABOUT THEIR PIVOTAL CONNECTIONS TO SAID CENTRAL FRAME SECTION BETWEEN LOWER POSITIONS WHEREIN SAID SIDE FRAME SECTIONS ARE GENERALLY COPLANAR WITH SAID CENTRAL FRAME SECTION AD INOPERATIVE POSITIONS WHEREIN SAID SIDE FRAME SECTIONS ARE DISPOSED IN GENERALLY FORWARDLY PROJECTING RELATIONSHIP OF OPPOSITE SIDES OF THE TRACTOR.