Back to results
US 4,034,814 AGranted
Rotary harrows
OwnerCornelis van der Lelyinventor
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
OwnerCornelis van der Lelyinventor
Estimating the term…
A cultivator or harrow has a row of soil working members and each of these members is a rotatable support on a shaft that is driven to rotate about an upwardly extending axis. Each support is comprised by two similar diametrically opposed portions and each portion has a lower tine and an upper tool that differs in shape and form from the lower tine. The upper tool can be a pair of different tines or a tine-like extension of the support portion that functions as a rigid tine. The lower more resilient tine works the sub-soil and the upper tool works the topsoil. The lower tines of the two portions can be a single element of spring steel that is retained by quick release pins in lower support recesses and the fastening portions of the lower tines can bear on the heads of further pins that retain upper tines in their corresponding recesses so that one release means retains all of the tools on each support portion.
A soil-cultivating implement or rotary harrow comprising a frame and a plurality of soil-working members supported on said frame in a row that extends transverse to the normal direction of travel, at least one of said soil-working members being mounted on an upwardly extending shaft and comprising a support on said shaft, at least two soil-working tools connected to said support at the same side of the shaft, one above the other, and each tool being spaced laterally from said shaft, each of said two tools comprising a resilient tine and the tines of said two tools being deflectable above axes, the axes about which the tines are deflectable being inclined to one another.
A soil-cultivating implement or rotary harrow comprising a frame and a plurality of soil working members supported on said frame in a row that extends transverse to the normal direction of travel, at least one of said soil-working members being mounted on an upwardly extending shaft and comprising a support on said shaft, at least two soil-working tools connected to said support at the same side of the shaft and each of side two tools being spaced laterally from said shaft and comprising at least one resilient tine that is deflectable about a respective axis the axes about which said tines are deflectable being inclined to one another, the tine of a first tool having a different degree of resilience than the tine of a second tool and the soil-working portion of a first tine being located above the soil-working portion of the second tine.
Dependencies are inferred from the claim text.