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Subsoil applicator

  • US 4,773,340 A
  • Filed: 12/19/1986
  • Issued: 09/27/1988
  • Est. Priority Date: 12/19/1986
  • Status: Expired due to Fees
First Claim
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1. In a subsoil applicator knife, the improvement comprising:

  • an elongated blade having a normally upwardly and rearwardly inclined longitudinal axis and a soil-slicing, longitudinally extending line edge all along the front thereof with respect to the normal path of travel of the knife,said blade being provided with a pair of opposite sides which initially mutually diverge from said edge along the length of the latter and then extend generally predominately fore-and-aft as the rear of the blade is approached;

    a soil-penetrating point on said blade at the lowermost and forwardmost extremity of said edge;

    an elongated, soil-forming wedge along the bottom of said blade and integral with the latter,said wedge commencing at said point and progressively increasing in width as the rear of the blade is approached until terminating at a rearward location disposed forwardly of the rear of the blade,said wedge having a pair of laterally opposite, triangular faces converging forwardly to said point and converging downwardly and inwardly to a common, lowermost, soil-creasing, fore-and-aft extending edge;

    a pair of elongated, fore-and-aft extending wings projecting laterally outwardly from opposite sides of the blade at the intersection of the wedge with the bottom of the blade; and

    a pair of closing fins projecting laterally outwardly from opposite sides of the blade above said wings and generally rearwardly thereof,said fins progressively widening rearwardly at an inclined angle of approximately 80°

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