Cultivator and tines

Claim 1

A cultivator comprising at least one soil-working member of said cultivator, said soil-working member comprising a support on a shaft rotatable about an upwardly extending axis, tine means secured to said support and depending downwardly towards the ground, sid tine means being offset from said shaft and positioned to trace a circular path on the ground during rotation, said tine means including a tine having an upper fastening portion secured to said support and a lower straight soil-working portion being inclined and extending downwardly in a trailing position with respect to the intended direction of rotation, said soil-working portion having sides comprising concave grooves and said sides having rounded corners therebetween and terminating in a tip, said soil-working portion being gradually flattened towards said tip, the cross-section of said soil-working portion having two relatively perpendicular diagonal measurements which vary from one another along the length of said soil-working portion, one of said measurements being progressively longer than the other towards said tip, and said one diagonal measurement extending substantially tangentially with respect to a circle centered upon the axis of rotation of said shaft, whereby said soil-working portion is sufficiently strong to be moved through hard soil and said tine prepares a strip of soil with a crumbled surface during operation.