Folding agricultural implement

Claim 1

IN AN IMPLEMENT HAVING A TRANSVERSELY ELONGATED TOOL-CARRYING FRAME VERTICALLY MOVABLE BETWEEN OPERATING AND TRANSPORT POSITION ADAPTED FOR ATTACHMENT TO A TRACTOR HAVING A DRAWBAR AND INCLUDING A CENTRAL FRAME SECTION HAVING SUPPORTING WHEELS VERTICALLY MOVABLE RELATIVE THERETO AND FOLDING END SECTIONS ADAPTED TO BE SWUNG HORIZONTALLY FROM AN OPERATING POSITION IN TRANSVERSE ALIGNMENT WITH THE CENTRAL SECTION TO A NON-OPERATING TRANSPORT POSITION IN TANDEM RELATION THERETO, A HITCH FRAME EXTENDING FORWARDLY FROM THE CENTRAL SECTION AND PIVOTALLY CONNECTED TO THE TRACTOR DRAWBAR FOR VERTICAL SWINGING RELATIVE THERETO BETWEEN A RAISED TRANSPORT POSITION ON SAID WHEELS AND A LOWERED OPERATING POSITION, HINGE MEANS CONNECTING THE INNER END OF EACH OF SAID END SECTIONS TO THE ADJACENT OUTER END OF SAID CENTRAL SECTION, SAID HINGE MEANS BEING MOUNTED ON THE CENTRAL FRAME SECTION SO THAT THE HINGE AXIS THEROF IS TILTED AT AN ACUTE ANGLE IN A VERTICLE PLANE PARALLEL TO THE DIRECTION OF TRAVEL OF THE IMPLEMENT IN THE OPERATING POSITION THEREOF AND IS TILTED TO A SUBSTANTIALLY VERTICAL POSITION WHEN THE IMPLEMENT IS RAISED TO ITS TRANSPORT POSITION.