Patent ID: 7290620

Claim:
A disk blade scraper for a tillage implement having a frame, a horizontal shaft suspended from the frame, a plurality of rotating disk blades arranged in laterally spaced relationship on the shaft, a hub spool surrounding the shaft between at least a pair of adjacent disk blades wherein a first end of the hub spool contacts one of the pair of adjacent disk blades thereby creating a transition joint between the first end of the hub spool and a surface of the one of the pair of adjacent disk blades, the scraper comprising: a bracket having an upper portion connected to the frame and a lower portion at an obtuse angle to the upper portion, the upper portion of the bracket lying in a plane that intersects the shaft and the frame; and a rotating disk mounted to the lower portion of the bracket, the rotating disk having an axis of rotation perpendicular to the lower portion of the bracket and a circumferential edge, wherein the rotating disk is mounted to a lower end of the lower portion of the bracket such that the circumferential edge of the rotating disk is adjacent the transition joint and such that the lower end of the lower portion of the bracket is between the rotating disk and the one of the pair of adjacent disk blades, wherein the surface of the one of the pair of adjacent disk blades is concave-shaped, wherein the one of the pair of adjacent disk blades includes an annular depression relative to the concave surface, the annular depression surrounding the transition joint, wherein the circumferential edge of the rotating disk is located within the annular depression, wherein the concave-shaped surface defines a cavity, and wherein the rotating disk is received entirely with the cavity.