Folding implement frame for grain drills and the like

Details Folding implement frame for grain drills and the like Folding implement frame for grain drills and the like

A - Human Necessities

01

B

111/17, 111/20

A01B 49/04 (2006.01) A01B 73/06 (2006.01) A01C 15/00 (2006.01)

Patent

CA 1264127

FOLDING IMPLEMENT FRAME FOR GRAIN DRILLS AND THE LIKE Abstract of the Invention A pull-type folding implement, such as a grain drill has individual and independent radial flotation for each of its drill units such that each unit can rise and fall, while remaining level, independently of the other, as well as cock and cant independently of the other as may be necessary to accommodate uneven ground terrain, yet the units may be folded into compact, fore- and-aft extending transport positions in which ground wheels thereof are retracted off the ground and the units are carried by a main, fore-and-aft carrier frame of the implement. A third, center unit may be provided between the two outer units and utilizes its own set of ground wheels during both field working and over-the-road travel when the other units are folded in, the center unit likewise having a floating connection with the carrier frame which permits the center unit to rise and fall, cock and cant when experiencing terrain irregularities. Because the weight of the two outer units is borne entirely by the carrier frame when the outer units are folded in for transport, a safety interlock is provided which prevents unfolding of the outer units from the carrier frame unless the ground wheels of the outer units have first been lowered into ground engaging positions capable of supporting the load of the outer units. Special cocked pivot assem- blies coupling the outer units with the central carrier frame cause the units to be likewise cocked about their longitudinal axes when folded into the transport position such that depending, outboard extremities of the units are provided with an extra measure of ground clearance at that time.

485258

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