Farming implement for ridging

Claim 1

An agricultural implement for being hauled by a tractor and comprising, emerging from a casing, a plurality of longitudinal parallel shafts revolving by pairs in opposite directions, driven from a common gearing actuated in turn from a power take-off of the tractor, wherein only an outermost pair of said shafts, or two non-adjacent ones of said shafts, revolving in opposite directions, are provided with rotary tools for breaking and cutting the soil and throwing clods towards each other, so as to dig during each pass a pair of parallel trenches and form a ridge therebetween, wherein said rotary tools consist of cylindrical hollow drums having horizontal axes and being provided with bottom walls having means for positioning and securing said drums to a respective one of the tool-supporting shafts, the cylindrical walls of said drums carrying at spaced intervals on their outer peripheries a plurality of cutters and a plurality of shovel-forming blades, said cutters and said blades being so arranged that their combined action loosens the soil and throws the same towards a central portion of the implement for forming the ridge, wherein diametrally opposite ones of said cutters, carried by said rotary tools, are longer than the others, and wherein said blades are interconnected by tie-rods tangent to the outer cylindrical walls of said tools, a weld spot being formed at each point of contact between said tie-rods and said cylindrical walls.