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Soil-displacement drill and method for manufacturing a pile

  • US 4,623,025 A
  • Filed: 10/11/1984
  • Issued: 11/18/1986
  • Est. Priority Date: 04/09/1984
  • Status: Expired due to Term
First Claim
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1. A soil-displacement drill comprising:

  • a drill pipe having a lower end;

    a head having an upwardly extending cylindrically-shaped portion and a downwardly directed conically-shaped portion having an apex, said head being mounted on the lower end of said drill pipe;

    at least two equally spaced spiral ribs appending from said head, each spiral rib defining a substantially vertical section extending from the apex of said conically-shaped portion to said cylindrically-shaped portion and a substantially horizontally extending radial section extending around a portion of said cylindrically-shaped portion as an extension of said substantially vertical section.

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