Agricultural seeder

An agricultural seeder comprising a frame, means for supporting the frame for transportation in a direction of working movement across ground to be seeded, a plurality of seeding elements mounted on the frame at spaced positions across the width of the frame for applying seeds to the ground as the frame is moved across the ground, supply means for supplying seeds to each seeding element, each seeding element including ground cutting means for cutting a furrow into the surface of the ground, seed feeding means for depositing seeds from the supply means onto the ground within the furrow, means mounting the cutting means on the frame including a shank extending upwardly from the cutting means and lying in a substantially vertical plane parallel to the direction of working movement, and trash cleaning means for removing crop residue material from becoming trapped on a front surface of the shank and carried thereby, the trash cleaning means comprising a cross shaft extending transversely of the shank at a position spaced rearwardly relative to a direction of travel from the shank and including for each shank a first and a second tine mounted on the cross shaft for rotation about a longitudinal axis of the cross shaft, and means for driving the shaft such that the tines rotate to a position where a portion thereof lies along side the shank to knock said crop residue material, the first of the tines being arranged on one side of the shank and the second of the tines being arranged on an opposed side of the shank, the first and second tines being angularly offset relative to the axis of the cross shaft so as to knock the crop residue at different times.

An agricultural seeder comprising a frame, means for supporting the frame for transportation in a direction of working movement across ground to be seeded, a plurality of seeding elements mounted on the frame at spaced positions across the width of the frame for applying seeds to the ground as the frame is moved across the ground, supply means for supplying seeds to each seeding element, each seeding element including ground cutting means for cutting a furrow into the surface of the ground, seed feeding means for depositing seeds from the supply means onto the ground within the furrow, the cutting means comprising a sweep shaped to define two cutting edges lying in a common horizontal first plane and diverging outwardly and rearwardly from a forwardmost apex lying on a center line of the sweep to two trailing apexes, two inclined sweep surfaces each inclined upwardly and rearwardly from a respective one of the cutting edges and two further sweep surfaces each extending rearwardly in a substantially horizontal second plane from an upper edge of a respective one of the inclined sweep surfaces to a trailing edge, with the trailing edges diverging outwardly and rearwardly of a point of intersection of the trailing edges, thus defining a cavity above the first plane and below the second plane, rearwardly of the apex and outwardly of the trailing edges, said seed feeding means including a feeding tube and means splitting the feeding tube into a first and second delivery tube each extending to an outlet end located within the cavity on a respective side of the center line rearwardly and outwardly of the apex, forwardly of the trailing apexes and outwardly of the trailing edges.

An agricultural seeder comprising a frame, means for supporting the frame for transportation in a direction of working movement across ground to be seeded, a plurality of seeding elements mounted on the frame at spaced positions across the width of the frame for applying seeds to the ground as the frame is moved across the ground, first supply means for supplying seeds to each seeding element, second supply means for supplying fertilizer to each seeding element, each seeding element including ground cutting means for cutting a furrow into the surface of the ground, seed feeding means for depositing seeds from the first supply means into the ground within the furrow, fertilizer feeding means for depositing fertilizer from the second supply means into the ground within the furrow, the first supply means comprising a first hopper and a first supply duct into which seeds are metered from the hopper, the second supply means comprising a second hopper and a second supply duct into which the fertilizer is metered from the second hopper, air flow means for injecting air flow along the first and second supply duct to transport the seeds and fertilizer respectively from the first and second hoppers to the seed feeding means and the fertilizer feeding means respectively, the first and second supply ducts being arranged with at least a portion thereof side by side to define a common wall therebetween, and valve means for bleeding from the second supply duct into the first supply duct a small portion of the fertilizer flowing therein, the valve means comprising an opening through the common wall and a flap valve mounted at the opening on the common wall for pivotal movement about an axis lying in the common wall at right angles to the length of the side-by-side portions of the supply ducts so that the flap valve is movable from a first position substantially closing the opening to adjustable positions on at least that side of the common wall which lies in the second supply duct to divert an adjustable portion of the fertilizer from that side of the common wall through the opening into the first supply duct.