Soil cultivating implements or rotary harrows

A cultivating implement comprising a plurality of soil-working members positioned in a row that extends transverse to the direction of travel, each of said soil-working members having a substantially horizontal support mounted for rotation on an upwardly extending shaft and driving means connected to rotate said soil-working members, each support having at least one downwardly extending holder that is spaced from said shaft and fitted with soil-working means, the latter means including a lower soil-working portion and an upper fastening portion with a cavity, the lower part of said holder being received in said cavity and fastening means connected to said holder for releasably retaining same in said cavity and preventing relative turning, said lower part having a cross-section which is smaller than the cross-section of the remainder of said holder, said lower part extending substantially parallel to said shaft which forms the axis of rotation of the soil-working member and being inclined rearwardly with respect to the normal direction of rotation of that member, said holder including an abutment surface above its lower end that engages a cooperating abutment surface of the fastening portion of said soil-working means, said fastening means being received in cooperating bores in said upper fastening portion and the lower part of said holder, said upper fastening portion comprising an inverted frusto-conical portion that merges into the lower soil-working portion.

A cultivating implement comprising a plurality of soil-working members positioned in a row that extends transverse to the direction of travel, each of said soil-working members having a substantially horizontal support mounted for rotation on an upwardly extending shaft and driving means connected to rotate said soil-working members, each support having at least one downwardly extending holder that is spaced from said shaft and fitted with a tine, said tine including a lower soil-working portion and an upper fastening portion with a cavity, the lower part of said holder being received in said cavity and fastening means connected to said holder for releasably retaining same in said cavity and preventing relative turning, said lower part of the holder having a cross-section which is smaller than the cross-section of the remainder of the holder and said lower part extending substantially parallel to said shaft which forms the axis of rotation of the soil-working member and being inclined rearwardly with respect to the normal direction of rotation of that member, said m holder including an abutment surface above its lower end that engages a cooperating abutment surface of the fastening portion of said soil-working means, said fastening means being received in cooperating bores in said upper fastening portion and the lower part of said holder, said upper fastening portion comprising an inverted frusto-conical portion that merges into the lower soil-working portion.