Patent ID: 7104341

Claim:
A deep tillage point structure adapted for connection to an upright shank for forward movement through a compacted layer of soil, the point structure comprising: a main body having a fore-and-aft extending leading nose with a front surface which extends upwardly and rearwardly from a nose leading edge for initiating fracture of the compacted layer, a tapered top surface extending rearwardly and upwardly from the front surface, the tapered top surface including outwardly facing surfaces extending downwardly from an apex, the apex extending from adjacent the nose leading edge and terminating in an apex aft end at a central fore-and-aft location on the main body, the surfaces forming an included angle at the apex and causing an initial parting stress of the fractured compacted layer as soil moves rearwardly along a length of the apex to an uppermost rear portion of the apex adjacent the upright shank, wherein the length of the apex is substantially greater than a distance equal to a maximum height of the apex above the nose leading edge and the included angle is obtuse substantially the entire length of the apex and approximately 100 degrees adjacent the aft end of the apex to facilitate soil parting by the upright shank in the initially stressed fractured compacted layer, and wherein wings include forwardmost portions located behind the aft end of the apex.