Towed plow

Claim 1

IN AN AGRICULTURAL IMPLEMENT, A MAIN FRAME BAR EXTENDING OBLIQUELY TO THE DIRECTION IN WHICH THE IMPLEMENT IS ADAPTED TO BE PULLED, A PLURALITY OF DEPENDING EARTHWORKING TOOLS MOUNTED ON SAID MAIN FRAME BAR, A FORWARDLY EXTENDING HITCH BAR NONROTATABLY ATTACHED TO THE MAIN FRAME BAR, GENERALLY SHIFTABLE HITCH MEANS CARRIED BY SAID HITCH BAR ADAPTED TO BE SECURED TO A TRACTOR, AND FORWARD AND REAR FURROW WHEELS MOUNTED ON FORWARD AND REAR PORTIONS OF THE MAIN FRAME BAR, RESPECTIVELY, EACH OF SAID FURROW WHEELS BEING MOUNTED FOR GENERALLY VERTICAL MOVEMENT, A ROCKSHAFT JOURNALED ON THE MAIN FRAME BAR, A ROCK ARM SECURED TO A CENTRAL PORTION OF SAID ROCKSHAFT, A FIRST MEMBER NONROTATABLY SECURED TO ONE END OF SAID ROCKSHAFT, A SECOND MEMBER JOURNALED ABOUT THE OTHER END OF SAID ROCKSHAFT, A PAIR OF SEPARATELY OPERABLE POWER CYLINDERS MOUNTED ON THE FORWARD PORTION OF SAID MAIN FRAME BAR, MEANS CONNECTING SAID REAR FURROW WHEEL WITH SAID ROCK ARM, MEANS CONNECTING ONE CYLINDER TO SAID FIRST MEMBER TO SHIFT SAID REAR FURROW WHEEL, MEANS CONNECTING THE OTHER CYLINDER TO SAID SECOND MEMBER, MEANS CONNECTING THE SECOND MEMBER TO THE FRONT FURROW WHEEL TO SHIFT THE WHEEL DOWNWARDLY, CROSS SHAFT MEANS, FIRST MEANS INTERCONNECTING ONE END OF SAID CROSS SHAFT MEANS WITH SAID SECOND MEMBER TO ROTATE SAID CROSS SHAFT MEANS IN ONE DIRECTION WHEN SAID FRONT FURROW WHEEL IS LOWERED, AND SECOND MEANS INTERCONNECTING THE OTHER END OF SAID CROSS SHAFT MEANS WITH THE VERTICALLY SWINGABLE HITCH MEANS TO SWING THE FORWARD END OF THE SWINGABLE HITCH MEANS DOWNWARDLY WHEN SAID CROSS SHAFT MEANS IS ROTATED IN SAID ONE DIRECTION.