Patent ID: 7216596

Claim:
An agricultural plough including: a longitudinally extending support member having a forward portion to be attached to a vehicle to thereby enable the apparatus to be towed by the vehicle; a generally “n” shaped frame fixed to said support member and including a pair of ends located on opposite longitudinal sides and spaced normal to said support member; a pair of axles attached to and extending laterally from said ends and providing a pair of laterally extending rotational axes, the axes being located on opposite sides of the member and in a plane extending transversely normal to said member at an acute angle longitudinally so as to extend rearwardly down, the axes each being inclined by an acute angle of 6 to 12 degrees to a plane extending normal to the member to diverge rearwardly; a plough disc supported on each axle to rotate about said rotational axes, with the discs and axles being configured so that the discs converge rearwardly and downwardly, the discs being displaced rearwardly from said forward portion; a wheel attached to said support member and rotatable about an axis generally transverse of the support member, the wheel being located rearwardly of said axles; and means connected to the support member and to be attached to the vehicle, to urge said member downwardly so that said discs are urged into soil and said wheel is urged into contact with a soil surface rearwardly of the discs so that upon forward movement of the vehicle with the discs engaged in the soil, each disc forms a separate groove and a corresponding ridge in the soil between said grooves, with the ridge being engaged by the wheel to urge the soil to cover seeds located in the grooves.