Rail anchoring spike

  • US 6,471,140 B2
  • Filed: 08/10/2001
  • Issued: 10/29/2002
  • Est. Priority Date: 08/11/2000
  • Status: Expired due to Term
First Claim
Patent Images

1. A metal to wood fastening spike, comprising:

  • (a) a head having an annular flange;

    (b) a stand-off extending axially from said flange;

    (c) a plurality of flutes extending axially from said stand-off, said flutes being adapted to engage wood;

    said stand-off having a length adapted to ensure that said flutes are at least partially embedded in wood when said spike is used to fasten metal to wood; and

    (d) a shank extending axially from said flutes to form a tapered tip, said shank further comprising a plurality of helical, generally parallel threads extending over at least a portion of said shank, running from said flutes to said tip.

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