Concrete railroad ties
AssigneeCostain Concrete Company Limited
InventorJohn Buekett
Life of this patent
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Abstract
A concrete railroad tie has rail seats defined by plates, which are made from stainless steel or other non-corrodable metal or plastic, cast into the top surface of the tie at the rail seats. The stiffness of the plates should be less than that of the concrete body of the tie and they should have smooth top faces so that they do not cause scuffing of associated rail pads on which the rails rest at the seats. Each plate may have lugs projecting from its underside for providing a mechanical connection with the body of the tie.
Claims3
In an assembly comprising a concrete railroad tie, at least one rail seat situated on a top surface of said tie, at least one railroad rail having a rail flange, and means securing said rail to said tie with said rail flange supported on said rail seat, the improvement which enhances abrasion resistance of said tie at said rail seat and which is characterised by:
- a rectangular plate made from non-corrodible material and defining said rail seat,
- said corrodible material being selected from the group comprising stainless steel, other non-corrodible metal and plastic,
- said plate being of substantially the same width as said rail flange and extending substantially across the full width of said tie beneath said rail flange,
- said plate having a stiffness less than that of said concrete tie and a smooth upper surface, and
- a tie pad located between said rail and said plate and having said rail flange resting thereon, said tie pad being made from a material selected from the group comprising rubber, plastic and the like.
Dependencies are inferred from the claim text.