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US 4,537,262 AGranted
Soil cultivation
OwnerCornelis van der Lelyinventor
Life of this patent
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OwnerCornelis van der Lelyinventor
Estimating the term…
A soil cultivating machine comprises two transverse rows of fixed tines and three transversely extending rollers. The front roller has discs which cut parallel slits in the soil. The two following rollers have transversely extending releasable blades mounted on angle-irons which form shallow V's pointed in the direction of the rollers' rotation and which are twisted about 90.degree. from their outboard ends to their centers. The rollers are drivingly interconnected by a chain transmission so that the middle roller rotates slower than the other two and the rear roller rotates faster than it would if freely rotating on the ground. The tines are in rows between the rollers and their depth of soil penetration relative to the underlying soil is adjustable. The rollers are mounted on a generally horizontal framework which is adjustable, however, so it can be inclined slightly either forward or aft to increase or decrease the penetration of the front roller's discs.
A soil cultivating machine comprising a carrying frame and a plurality of cultivating members arranged on said frame, said cultivating members comprising three rollers arranged in series transverse to the machine's direction of travel during operations, said rollers being provided with cultivating elements and being drivably interconnected with each other during operation, the machine further comprising a framework and further cultivating members, said framework supporting said further cultivating members, said rollers being mounted on said carrying frame, said framework being adjustably connected to said carrying frame by two independently operable height adjustment means at two respective horizontally spaced apart locations so that said carrying frame and said rollers mounted thereon are movable as a whole relatively upwardly and downwardly with respect to said framework to which said further cultivating members are fastened, said rollers serving to establish the working depth of said further cultivating members.
A soil cultivating machine comprising a frame and a plurality of cultivating members arranged on said frame, said cultivating members comprising at least two rollers arranged transverse to the machine's direction of travel during operation, said cultivating members including at least two rows of cultivating tools connected to extend downwardly from said frame, said frame including a carrier frame, at least one of said rollers being disposed in front of said rows of cultivating tools with respect to said direction of travel and at least a further said roller of said rows disposed to the rear of said cultivating tools for levelling and crumbling the soil worked by said cultivating tools, wherein said rollers are drivably interconnected with each other during operation and supported by means of said carrier frame, said latter frame being in spaced apart locations pivotally connected to a portion of said frame, and means interengaging said frame portion and said carrier frame for providing for their relative vertical adjustment and defining the working depth of said cultivating tools.
Dependencies are inferred from the claim text.