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US 4,072,196 AGranted
Cultivators
OwnerCornelis van der Lelyinventor
Life of this patent
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OwnerCornelis van der Lelyinventor
Estimating the term…
A cultivator has groups of soil working members positioned in a row that extends transverse to the direction of travel. Each group includes a plurality of tined soil working members and a drive system that rotates each group as well as the individual soil working members of each group. The drive system is connectable to the p.t.o. of a tractor and comprises an elongated drive shaft that is geared to the central shaft of each group and a sun pinion of each central shaft is meshed with planet pinions on the shafts about which the soil working members rotate. The pinion gears of each group are housed in a circular disc-shaped casing so that the entire casing of each group rotates about its central shaft during operation. A forward coupling member is attached to the frame for connection to the tractor and a rear support roller provides support to regulate the working depths of the soil working members.
A soil cultivator comprising a frame movable over the ground and soil working means supported on said frame, said soil working means including a plurality of rotors mounted on respective, substantially central shafts, said rotors being positioned side-by-side transverse to the direction of normal travel of said cultivator to work adjoining strips of land and the shafts of adjacent rotors being driven in relative opposite directions, each rotor being rotatable about a first upwardly extending axis defined by the corresponding central shaft on that rotor, and driving means, comprising a pinion transmission, being connected to said central shaft, said rotor having support means that is freely rotatable about said central shaft and said support means mounting a plurality of soil working members, said members being rotatable about corresponding upwardly extending axes defined by further shafts journalled on said support means, said driving means being drivenly connected to said further shafts and the latter extending substantially parallel to said first mentioned shaft, said soil working members comprising substantially horizontal elongated tine supports and tines extending downwardly from the outer ends of said supports.
A soil cultivator comprising a frame movable over the ground and soil working means supported on said frame, said soil working means including a plurality of rotors mounted on respective, substantially central shafts, said rotors being positioned side-by-side transverse to the direction of normal travel of said cultivator to work adjoining strips of land and the shafts of adjacent rotors being driven in relative opposite directions, each rotor having a common support that is freely rotatable about a first upwardly extending axis defined by the corresponding central shaft on that rotor, driving means comprising a pinion transmission, being connected to said central shaft, a plurality of soil working members being mounted on said common support and positioned around said central shaft, said members being rotatable about corresponding upwardly extending axes defined by further shafts journalled on said common support, said driving means comprising sun and planet gears that drivenly interconnect said further shafts to said central shaft and the latter extending substantially parallel to said further shafts, said soil working members each comprising a substantially horizontal elongated tine support and at least one tine extending downwardly from said support.
Dependencies are inferred from the claim text.