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US 4,324,093 AGranted
Device for displacing crop lying on the ground
AssigneeC. van der Lely N.V.
InventorsAry van der Lely, Cornelis J. G. Bom
Life of this patent
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AssigneeC. van der Lely N.V.
InventorsAry van der Lely, Cornelis J. G. Bom
Estimating the term…
A device for displacing crop lying on the ground such as a side-delivery rake or tedder, has a frame supporting a row of ground-driven rake wheels each of which is movable up and down with respect to the frame. The device can be coupled to a tractor by a fastening structure that includes a frame portion passed through a central hole in one rake wheel. The frame portion connects the beam carrying the rake wheels, to a drawbar of the frame portion. By passing the frame portion through the rake wheel, the fastening structure can be of minimal dimensions reducing the damaging effect of forces applied to the fastening structure during use of the device. The rake wheels are similar to one another except the wheel with a central hole. The hole is surrounded by a circular hub rotatably mounted on fixed rollers on a structure connected to the frame. A supporting ground wheel for the frame is pivoted to a frame support and the pivot interconnected with the frame by a stabilizer that resists the extreme pivotal movements of the ground wheel.
A device for displacing crop lying on the ground comprising a frame and a plurality of rotatable rake wheels supported on the frame by crank means that allows upward and downward movements of the wheels, said wheels being positioned to rotate and contact the ground, at least one of said wheels comprising bearing means that surrounds an enlarged center hole and said bearing means being interconnected to the frame by said crank means, said frame including a portion that extends through the hole with substantial clearance to interconnect with the remainder of said frame, said portion being displaceable within said hole relative to said one wheel during operation, whereby the latter can follow uneven ground.
A device as claimed in claim 28, wherein, viewed at right angles to the plane of said one rake wheel, the inner boundary of said hub and that of said bearing means substantially coincide.
A device for displacing crop lying on the ground comprising a frame and a plurality of rotatable rake wheels supported on the frame by crank means, said wheels being mounted in a row for free rotation responsive to contact with the ground and said wheels being connected to an elongated frame beam by crank means, at least one of said wheels comprising a ring-shaped hub that surrounds an enlarged central hole and said hub being mounted on bearing means that is interconnected to said beam by said crank means so that said one wheel is displaceable upwardly and downwardly within said hole with respect to said frame, a frame portion extending through said hole with substantial clearance to a connection with said beam and said portion comprising coupling means for attachment to a prime mover, said portion being displaceable within said hole relative to said one wheel during operation whereby the latter can follow uneven ground.
An agricultural implement comprising a frame movable over the ground and at least one ground wheel connected to support said implement, said wheel being journalled in a carrier and said carrier being pivoted on arm means connected to said frame, a stabilizing rod interconnecting said pivot to a supporting element on the frame and said rod being freely displaceable between limits relative to the element for a portion of its length to allow said wheel to pivot about an upwardly extending axis during travel, means resisting the displacement of the rod relative to said element when the rod displacement exceeds said limits, said rod being passed through an opening in said element, said rod mounting spring means and a fixed stop on each side of the element, a further stop for said spring means at each side of said element and said spring means being positioned at each side of the element between stops to resist the displacement of the rod and the pivoting of said wheel.
Dependencies are inferred from the claim text.