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Multi-function draft implement

  • US 5,161,472 A
  • Filed: 10/09/1990
  • Issued: 11/10/1992
  • Est. Priority Date: 03/30/1984
  • Status: Expired due to Fees
First Claim
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1. In a seed planting unit for use with an air seeder having means for delivering a pressurized stream of air and seeds to the planting unit, the improvement in said planting unit comprising:

  • an upright knife for making a single vertical trench in the ground as the seeder is advanced,said knife having a lowermost extremity that forms the bottom of the trench;

    a fertilizer delivery conduit associated with said knife for use in delivering a band of fertilizer into the bottom of the trench prepared by the knife; and

    an opener having an inlet adapted to receive a pressurized stream of air and seeds and to deposit the seeds in the ground at a shallower depth than the fertilizer band,said opener being disposed in fore-and-aft alignment with said knife with respect to the path of travel of the seeder and having a transverse, leading, soil-engaging edge spaced above said lowermost extremity of the knife and extending outwardly beyond the knife in opposite lateral directions for producing a pair of seed-supporting shelves in substantially undisturbed soil along and outboard of opposite lateral sides of the trench above the bottom thereof,said opener further having passage means communicating with said inlet and including at least a pair of passages having trailing rearwardly opening seed discharge outlets located laterally outboard of the knife but inboard of the outermost extremities of said soil-engaging edge and at substantially the same level as said edge for depositing at least a pair of rows of seeds on the shelves on opposite sides of the single trench as the seeder is advanced,said outlets being spaced rearwardly from said edge and being separated from said edge by a fore-and-aft extending top surface of the opener causing soil to be lifted off the shelves at said edge, maintained above the shelves by the top surface until the seeds are deposited on the shelves, and then dropped back down on top of the seeds to cover the same.

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