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Ammonia applicator blade

  • US 4,201,142 A
  • Filed: 07/17/1978
  • Issued: 05/06/1980
  • Est. Priority Date: 07/17/1978
  • Status: Expired due to Term
First Claim
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1. A point for use in ammonia applicator blades, said point comprising a unitary metallic body having a minimum hardness of about 500 BHN, said body having a medial vertical plane of symmetry and comprising a substantially horizontally extending foot having toe and heel portions at its forward and rear ends respectively and a shin joined to the toe portion and extending upwardly and rearwardly therefrom, said foot and toe portion thereof having a bottom surface that is, throughout substantially their longitudinal extent, generally horizontal in both vertical transverse and longitudinal sections, said foot and the toe portion thereof having lateral sides with side surfaces that, throughout substantially their longitudinal extent, have a vertical transverse section that extend downwardly substantially vertically for a major proportion of their height and thence are in their lowermost extents offset outwardly for a vertical interval to define outwardly projecting lips extending along the lower side edges of the foot and its toe portion, with the lateral sides, including their lowermost extents, being rearwardly divergent in an arrangement such that the outward projection of the lips progressively increases rearwardly along the foot and its toe portion, said shin and its juncture with the toe portion being contoured to present in vertical profile a reclining V-shaped configuration and to present in horizontal section substantially throughout their heights a generally ogive forward configuration, said heel portion being notched to define a rear surface for the foot that extends upwardly substantially vertically from the bottom surface of the foot to a position above the lips of the latter, and which thence extends upwardly and rearwardly to the top of the foot in approximate parallelism with the shin, and said shin having a rear surface and the foot having a top surface that jointly define an opening of a generally reclining V-shape adapted to receive a blade shank therein.

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