Patent ID: 7631702

Claim:
A sintered hard-faced double coated rotary tempered metal harrow disk blade of a farm harrow implement wherein said harrow disk blade comprises: (a) a circular metal disk of heavy gauge steel of suitable diameter with rotation center mounting wherein said metal disk is formed with a concave side and a convex side, said disk comprising a blade edge formed at an intersection of said concave side and said convex side; and (b) a protective sintered hard-faced coating on each side of said circular metal disk of heavy gauge steel wherein said hard-faced coating comprises a durable coating thickness of suitable thickness applied as a coating width of suitable width to said rotary knife blade concave side and convex side of said metal disk of said sintered hard-faced double-coated rotary metal harrow disk blade, the coating covering at least a portion of the convex side and at least a portion of the concave side and extending from the convex side around the edge to the concave side.