Patent ID: 8365837

Claim:
A tillage assembly comprising: a mounting comprising structure operatively linking an upper mounting plate, a lower mounting plate oriented beneath the upper mounting plate, a resilient element between the upper mounting plate and the lower mounting plate, and a pivot structure forward of the resilient element comprising a horizontal pivot axis about which relative pivoting movement occurs between the lower mounting plate and the upper mounting plate to thereby deform the resilient element; a support arm extending downwardly and rearwardly from the mounting structure and interconnected with the lower mounting plate to pivot therewith about the horizontal pivot axis; a rotatable hub attached to the support arm distal from the mounting structure, the rotatable hub having a rotation axis passing therethrough; a concave rotatable tillage blade attached to the rotatable hub concentric with the rotation axis; and, wherein the support arm comprises at least a resilient portion that deflects laterally in response to lateral movement of the tillage blade due to impact with obstacles.