Rail anchoring spike
DCFirst Claim
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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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Abstract
An improved fastener for attaching metal to wood is provided. The fastener is particularly suited for use as a railroad spike for attaching a metal rail to a wooden tie. The improved spike is adapted for installation by either driving or screwing the spike into the tie. A plurality of flutes are adapted to engage with the tie, thereby preventing loosening of the spike. The spike may be used with or without a metal boss or fishplate to secure a metal rail to a wooden tie.
16 Citations
32 Claims
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1. A metal to wood fastening spike, comprising:
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(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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A railroad track assembly comprising a metal rail, a wooden tie, a metal tie plate adapted to engage said rail, and a spike driven into said tie, said spike adapted to fasten said tie plate and said rail to said tie, said spike further comprising:
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(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 said tie when said spike is used to fasten said tie plate to said tie; 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. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A method of using a railroad spike, comprising:
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(a) providing a railroad spike comprising a head having an annular flange, a stand-off extending axially from said flange, a plurality of flutes extending axially from said stand-off, and 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;
(b) providing a wooden tie, a metal rail, and a fishplate adapted to engage with said rail and said tie; and
(c) driving said spike into said tie until said flutes are at least partially embedded in said tie, and said fishplate is engaged with said rail. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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Specification