Patent ID: 6269886
Filing Date: 2001-08-07
Classification: A01B

Abstract:
In a ground-working cultivator, said cultivator having a center section connected to a tractor mount by a center hitch frame, a pair of inner wing sections next to the center section, said inner wing sections connected to the center hitch frame by a wing hitch frame, a pair of outer wing sections positioned next to the inner wing sections, each wing section and center section having a plurality of toolbars, each toolbar, each wing section and center section support by a plurality of caster wheels and packing wheels, the center section having a center frame, each inner wing having an inner wing frame, and each outer wing having an outer wing frame, said center frame pivotally connected to the inner wing frame by a universal joint, the improvement comprising a differential connecting rod and a draft cable further comprising:a. said universal joint supported on the center frame by a spherical bearing and a pivot;b. a bracket affixed to the center frame, said bracket having a slot for allowing said pivot to move;c. a pair of differential bars each bar slideable attached to the center frame each said differential bar having, a spring, an inner stop block and outer stop block, said stop blocks attached to the center frame and slideably supporting the differential bar, an inner sliding block slideably attached to the differential bar, said inner sliding block for compressing said spring, and outer sliding block affixed to the differential bar, said outer sliding block contacting the inner slide block and a pair of tie rods, each tie rod affixed to the inner stop;d. an `L`-shaped linkage pivotally attached to the center frame and differential bar, said linkage controlling the motion of the pivot in the slot;e. a draft support wire;f. an outer wing hitch attached to the outer wing, said wire pivotally attached to the outer wing hitch;g. an inner hitch attached to the wing hitch frame, said wire pivotally attached to the inner hitch; andh. a folding support arm attached to the wing hitch frame, said wire affixed to the arm.