US 4,090,571 AGranted

Soil cultivating implements

OwnerCornelis van der Lelyinventor

Life of this patent

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Abstract

An implement preferably has elongated, stationary beams that extend horizontally transverse to the normal direction of travel. Staggered soil cultivating rotors are fastened to the beams at spaced apart locations and are ground driven to work closely adjacent strips of soil or a single broad path. Each rotor is freely rotatable about an upwardly extending shaft and has downwardly extending soil working members, such as tines, with lower active portions. Each active portion can have a lower outwardly directed part that, during rotation, describes a circle having a radius about equal to or less than the length of the active portion. The outwardly directed tine part increases ground contact and improves rotation. The rotors can be mounted in pairs; the rotors of each pair being angled from the vertical so that they rotate in opposite directions from one another. The beams can be turned to a limited extent to change the working positions of the rotors and a supporting roller can be interconnected to the beams at the rear thereof to regulate the working depths of the soil working members.

Claims6

Dependent claims

A soil cultivating implement comprising a frame having elongated frame beams that extend transverse to the direction of travel and a plurality of tined soil working members supported on said beams, said soil working members being arranged in a number of pairs on each of said beams and the beams being arranged one behind the other, with respect to the direction of travel of the implement, the soil working members of each pair being freely rotatable about corresponding upwardly extending axes and having tines positioned to work adjoining strips of soil, the axes of rotation of the soil working members of said pair converging in an upward direction when viewed from the rear, said soil working members being rotated responsive to contact of their tines with the ground and the soil working members of said pair being normally rotated in relative opposite directions, the pairs of soil working members on the forward beam being positioned to work strips of soil located between other strips of soil worked by the members on a rearward beam, each beam, together with respective pairs of soil working members, being independently turnable about the longitudinal axis of that beam and means fixing said beam in any of a plurality of chosen positions.

Dependencies are inferred from the claim text.