Patent ID: 8381827
Filing Date: 2013-02-26
Classification: A01B

Abstract:
1. A tillage blade assembly comprising: a coil spring having a horizontal spring axis and first and second ends, the first end having a first shank extending tangentially therefrom and the second end having a second shank extending tangentially therefrom; the second shank having an upper portion proximal the spring and a lower portion distal from the spring, the lower portion comprising a shank axis, the upper shank portion and the lower shank portion offset from one another by an offset distance; the shank axis having a shank axis angle relative to a vertical direction perpendicular to the horizontal spring axis; the lower portion having mounted thereto a rotatable hub having a rotation axis passing therethrough, the rotation axis perpendicular to the shank axis, the rotation axis rotated about the lower shank axis by a rotation angle defined relative to the rotation axis being horizontal; and, wherein the offset distance, the shank axis angle and the rotation angle are selected so as to balance the forces transmitted through the assembly to be substantially parallel to the horizontal spring axis when the assembly is in use on a tillage implement.