Patent ID: 6843047

Claim:
A soil conditioning rotary reel comprising: an elongate support shaft having first and second opposing ends; a plurality of generally circular support plates affixed to and uniformly spaced along the length of said support shaft, said plurality of support plates including two end plates, one adjacent to but spaced from each said first and second ends of said support shaft, each said support plate including a plurality of connection points regularly spaced along the periphery thereof; a plurality of elongate bars affixed to each support plate, said bars being rectangular in cross-section and each affixed to one of said plurality of connection points on each said support plate such that a relatively thin generally fiat edge of the bar is directed generally radially outwards; and each said bar containing a helical twist and said connection points on said support plates positioned relative to one another on adjacent support plates such that sad bars form a helical cutting edge across the width of the reel, wherein an angle of attack of each said bar is in the range of 23 to 27 degrees relative to a line transverse to the direction of travel at 270 degrees, where 180 degrees is the direction of travel, 0 degrees is opposite the direction of travel, 90 degrees is upward and 270 degrees is toward the ground.