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US 9,068,294 B2Granted
Methods for repair and preventive maintenance of railroad ties using UV curable polymers
AssigneeEncore Rail Systems, Inc.
InventorsDouglas Delmonico, Fabian Weber
Life of this patent
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Abstract
A method for repair and preventive maintenance of railroad ties by application of a polymer system to the surface of the rail seat. The polymer system is cured by irradiation with ultraviolet light to fully cure or partially cure the polymer. The polymer system may be used in conjunction with a tie pad that is capable of transmitting ultraviolet light to permit curing of the polymer.
Claims8
A method for repair and preventive maintenance of railroad ties, comprising the steps of:
- providing a railroad tie having a rail seat;
- providing a UV curable polymer system;
- applying the UV curable polymer system to the rail seat;
- installing a tie pad capable of transmitting ultraviolet light over the UV curable polymer system applied to the rail seat;
- and
- curing the UV curable polymer system by irradiation with ultraviolet light through the tie pad.
3 more elements
A method for changing the shape of the rail seat of a railroad tie, comprising the steps of:
- providing a railroad tie having a rail seat with a first shape;
- installing a tie pad on the rail seat to form a mold cavity between the tie pad and rail seat, the tie pad capable of transmitting ultraviolet light;
- applying a UV curable polymer system on the rail seat, within the mold cavity;
- and
- curing the UV curable polymer system by irradiation with ultraviolet light through the tie pad to form a surface having a second shape different from the first shape.
2 more elements
Dependencies are inferred from the claim text.