Abstract: A seal assembly is disclosed for a bearing having first ring with a first inner surface, a second ring with a second inner surface, and at least one bearing member disposed between the first and second inner surfaces. An exterior seal with a first plurality of lips is attached to an exterior backing, the exterior backing engaging the first ring of the bearing to hold the first plurality of lips against the second inner surface of the second ring. An interior seal with a second plurality of lips is attached to an interior backing, the interior backing engaging the second ring of the bearing to hold the second plurality of lips against the first inner surface of the first ring. The second plurality of lips may be configure differently than the first plurality of seal lips. The interior backing may be oriented between the exterior seal and the interior seal.

Abstract: A seal assembly is disclosed for a bearing having first ring with a first inner surface, a second ring with a second inner surface, and at least one bearing member disposed between the first and second inner surfaces. An exterior seal with a first plurality of lips is attached to an exterior backing, the exterior backing engaging the first ring of the bearing to hold the first plurality of lips against the second inner surface of the second ring. An interior seal with a second plurality of lips is attached to an interior backing, the interior backing engaging the second ring of the bearing to hold the second plurality of lips against the first inner surface of the first ring. The second plurality of lips may be configure differently than the first plurality of seal lips. The interior backing may be oriented between the exterior seal and the interior seal.

Abstract: A multiple rig row crop cultivator with first and second concave disks supported for operation at two different depths from adjacent rigs to provide two-step sizing of residue. The first disk, located ahead of the second disk, operates at a first depth in the soil to slice out the upper portions of roots and direct plant residue to the row middle. The second disk cuts to a depth approximately twice that of the first disk to further cut out root sections and move the root sections and other plant debris to the opposite row middle. After the disks move stalks and roots to the row middles, sweeps with ridging/bedding wings move the mixture of soil, stalks, and roots to the top of the bed to cover the groove made by the disks and preserve the original plant bed.

Abstract: A rig assembly on a combination row crop cultivator and chemical applicator includes a knife or other applicator device supported in front of the cultivator sweep and behind the disk coulter blade. The sweep helps seal the chemical in the ground in certain soil conditions to prevent chemical loss, particularly when additional closing structure is not in use. A selectively attachable, shank-mounted closing mechanism, preferably a press wheel, may be mounted directly behind the sweep to assure a good chemical seal. Disk coulter support straps have flanges that provide a conveniently accessed mount for the applicator device and present minimal interference to trash and soil flow. A simple bracket connects an arm on the closing wheel mechanism to a central portion of the sweep standard. Numerous combinations of tools and tool mounting arrangements and adjustments are facilitated by the rig construction.