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US 4,227,580 AGranted
Implement with side screening plates and soil roller
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 harrow has an elongated frame beam supporting a row of rotatable soil-working members mounted side-by-side on upwardly extending shafts. The frame beam and row of soil-working members extend transverse to the direction of travel of the harrow. At each lateral end of the row, a screening plate is positioned and pivoted to the frame beam. Each screening plate extends in a substantially vertical plane in the general direction of travel. Also, each plate has a lower support portion that rides over the ground and side edges that are inclined upwardly. The screening plates are supported on arms that can be pivoted to relocate the plates 180 degrees so they can rest in inverted positions on top of the frame beam during transport. A roller is pivoted to the frame and positioned to the rear of the soil working members and the screening plates are located between the roller and the members, when seen from the side.
A harrow comprising an elongated frame extending transverse to the normal direction of travel and a plurality of adjacent soil-working members supported in a row on said frame, drive means being provided for rotating said soil-working members about upwardly extending axis and each of said members comprising a substantially horizontal support with at least one downwardly extending tine, a substantially vertical screening plate being normally positioned adjacent each opposite lateral side of said row, said plate extending in the general direction of travel and having a lower edge, said lower edge being positioned to ride over the ground during travel, said plate being pivoted to said frame through arm means and said arm means extending from said plate upwardly and then substantially horizontally, in the longitudinal direction of said frame, said arm means being pivoted to the frame a substantial distance from the lateral side thereof and said distance corresponding substantially to the distance between the axes of rotation of two adjacent soil-working members, said plate being freely turnable upwardly and downwardly to match ground undulations during travel, a soil compressing roller being connected to the frame by pivotable supports, said roller being positioned to the rear and spaced from said row and said plate being positioned between the roller and said soil working members, when viewed from the side, to screen the space between the roller and said members.
A harrow comprising an elongated frame extending transverse to the normal direction of travel, a plurality of soil-working members supported in a row on said frame, said soil-working members being rotatably mounted on upwardly extending shafts and each of said members comprising a support with at least one downwardly extending tine, a substantially vertical screening plate being normally positioned adjacent each opposite lateral side of said row and said plate extending in the general direction of travel, said plate having a lower edge that rides over the ground during travel, said plate being pivotably connected to said frame through arm means and said arm means extending from said plate and connected to said frame a substantial distance from the lateral side of said frame, said plate being pivotably connected to said frame and freely turnable upwardly or downwardly about an axis which extends generally parallel to the direction of travel of the harrow to match ground undulations, a soil compressing roller being connected to the frame by pivotable supports, said roller being positioned to the rear and spaced from said row and said plate being positioned between the roller and said soil working members, when viewed from the side, to screen the space between the roller and said members.
A harrow comprising an elongated frame extending transverse to the harrow's normal direction of travel, a plurality of soil-working members supported in a row along said frame, each soil-working member being rotatably mounted on a shaft having a substantially vertical axis and comprising a support having at least two downwardly extending tines and each of said two tines being spaced substantially the same radius from said shaft, substantially vertically disposed screening plates normally positioned adjacent the opposite lateral sides of said row and each plate extending in the general direction of harrow travel, a soil compressing roller connected to said frame and located behind said soil working members, said screening plate being positioned laterally outwardly and immediately adjacent an outer soil working member, said screening plate having a lower edge adapted to ride on the ground during travel, arm means pivotally connecting said screening plate to said frame, said arm means extending inboard from the screening plate and being pivoted to the top of said frame a substantial distance from the lateral side of said row, inboard of the shaft for said outer soil working member, said plate being freely turnable about an axis which extends generally parallel to the normal direction of travel, whereby said plate independently rides along the ground at levels both above and below the surface of the supporting roller during travel.
Dependencies are inferred from the claim text.