Abstract: A lower planting arm of a row unit that includes a first linkage arm having a first end and a second end opposite to the first end, and a second linkage arm laterally opposing the first linkage arm and having a third end laterally opposite to the first end of the first linkage arm and a fourth end longitudinally opposite to the third end and laterally opposite to the second end of the first linkage arm. The lower planting arm also includes a first bracket that fixedly engages with the first linkage arm and the second linkage arm at a first position that is between to the first end and the third end, and a second bracket that fixedly engages with the first linkage arm and the second linkage at a second position opposite to the first position that is between the second end and the fourth end.

Abstract: A lower planting arm of a row unit. The lower planting arm includes a first linkage arm. The lower planting arm also includes a second linkage arm parallel with the first linkage arm. The lower planting arm also includes a first bracket fixedly engaging with the first linkage arm and the second linkage arm at a first position. The lower planting arm also includes a second bracket fixedly engaging with the first linkage arm and the second linkage at a second position opposite to the first position. Each of the first bracket and the second bracket of the lower planting arm is adapted to operably engage with an actuating device of the row unit.

Abstract: A lower planting arm of a row unit. The lower planting arm includes a first linkage arm. The lower planting arm also includes a second linkage arm parallel with the first linkage arm. The lower planting arm also includes a first bracket fixedly engaging with the first linkage arm and the second linkage arm at a first position. The lower planting arm also includes a second bracket fixedly engaging with the first linkage arm and the second linkage at a second position opposite to the first position. Each of the first bracket and the second bracket of the lower planting arm is adapted to operably engage with an actuating device of the row unit.

Abstract: A bearing assembly engaged with an end of a rotatable shaft. The assembly includes a hub defining a first bore extending between a first opening at a first end of the hub and a second opening at a second end of the hub. A bearing sleeve engaged in the first bore defines a second bore. The shaft's end is inserted through a first opening in the second bore. A sealed bearing located between the bearing sleeve and the hub's interior surface enables relative rotation therebetween. A first sealing mechanism seals the first bore's first opening and a second sealing mechanism seals the second openings of both of the first and second bores. The first sealing mechanism includes an L-shaped ring circumscribing the bearing sleeve and a rubber sealing member. The second sealing mechanism includes a hemispherical region and flange secured to the hub by a retaining ring.