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US 4,381,076 AGranted
Dropped railroad tie for railway without ballast
AssigneeRegie Nationale des Usines Renault
InventorRene Munier
Life of this patent
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Abstract
The construction of steel-concrete railroad ties onto which rails are fixed is disclosed. The ties are composed of a metal saddle for fastening to the rail, comprising a tie-plate extending over a part of the upper surface of the tie and forming the zone for attachment and support of the rail. The tie-plate further extends into the tie through ribs sealed in the concrete of the tie and constitutes at least part of its reinforcement.
Claims1
A dropped railroad tie comprising:
- a concrete tie block having an upper surface;
- and
- a metal saddle in said block, said metal saddle including a tie-plate covering a support area of said upper surface and adapted to receive the foot and fastenings of a rail in said support area, and a plurality of ribs transversely fixed to said tie plate and forming a first truss, said ribs extending into said tie block and being sealed in the concrete of said tie block,
- wherein at least some of said ribs extend parallel to the length of said tie and decrease in height from said support area toward the ends of said ribs, whereby said saddle approximates an equal stress resistance beam,
- whereby said saddle absorbs flexure stresses and transmits compressive stresses to said tie block,
- wherein said saddle is formed of a cut steel plate shaped in a U section, the flanges of which form said ribs and wherein the outer frame of a round bar flat grill second truss wedgingly encloses said flanges within said tie,
- whereby said outer frame of said second truss reinforces said saddle against bending stresses.
4 more elements
Dependencies are inferred from the claim text.