Rotary harrows
OwnerCornelis van der Lelyinventor
Life of this patent
Estimating the term…
Abstract
A rotary harrow has a plurality of soil working members mounted in a row and each of the members is rotatably mounted on an upwardly extending shaft. Each soil working member includes a downwardly extending support on the lower end of a corresponding shaft and a soil working tool is mounted on the support. Each tool includes at least one pair of tines having respective coils that encircle the support and the entire tool can be made from a single length of spring steel rod. A transverse bolt with clamps couples the support with a connecting portion of the tool between the coils.
Claims8
A soil cultivating implement or rotary harrow comprising a frame supporting a plurality of soil working members mounted on substantially vertical shafts and rotatable about said shafts, said shafts being journaled in a portion of said frame and being positioned in a row that extends transverse to the normal direction of travel, supports being connected to the lower ends of said shafts and said supports being located below said frame portion, at least two downwardly extending tines being fastened to each support and said tines having coils that encircle said support, the longitudinal axes of said coils substantially coinciding with the axis of rotation of the corresponding soil working member, lower active portions of said tines being substantially straight and extending substantially parallel to the axis of rotation of said soil working member, said active portions being interconnected to respective coils by intermediate substantially horizontal portions that are integral with said coils and active portions.
A soil cultivating implement or rotaty harrow comprising a frame supporting a plurality of soil working members mounted on substantially vertical shafts and rotatable about said shafts, said shafts being journalled in a portion of said frame and being positioned in a row that extends transverse to the normal direction of travel, supports being connected to the lower ends of said shafts and said supports being located below said frame portion, at least two tines fastened to said support by coils that encircle said support, said tines having respective lower, downwardly extending active portions and intermediate, substantially horizontal parts connected to said coils, the longitudinal axes of said coils substantially coinciding with the axis of rotation of the corresponding soil working member, one tine being connected to said support by an upper coil and the second tine being connected to the support by a lower coil, the lowermost ends of said tines being located at substantially the same soil working levels.
Dependencies are inferred from the claim text.