Patent ID: 6267184
Filing Date: 2001-07-31
Classification: A01B

Abstract:
A connecting rod for a pull-type agricultural tillage device, comprising:a. a center frame positioned between a pair of inner wings, said center frame connected to each said inner wings by a universal joint, 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 slideably attached to the center frame;d. a spring assembly for controlling the movement of each differential bar, further comprising:i. a spring co-axial to each differential bar:ii. an inner stop block and an outer stop block, said stop blocks attached to the center frame and slideably supporting the differential bar:iii. an inner sliding block slideably attached to the differential bar, said inner sliding block for compressing said spring:iv. an outer sliding block affixed to the differential bar, said outer sliding block contacting the inner slide block: andv. a pair of tie rods, each tie rod affixed to the inner stop and outer stop;e. a tongue assembly which can prevent the movement of each differential bar, further comprising:i. a tongue pivotally affixed to a hitch center frame, said tongue capable of rotating and contacting the differential bar: andii. a tongue spring for biasing the tongue towards the differential bar: andf. a `L`-shaped linkage pivotally attached to the center frame and differential bar, said linkage controlling the motion of the pivot in the slot.