Restoring and recycling railroad ties
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United States of America Patent
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May 20, 2014
Grant Date -
Jul 26, 2012
app pub date -
Jan 25, 2011
filing date -
Jan 25, 2011
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Abstract
A method for restoring and reusing railroad ties and the resulting product are disclosed. According to the method, otherwise spent wooden ties are sorted as to their apparent suitability for providing a core for reuse. Those found unsuitable are discarded, while those found to be suitable are milled or trimmed about their dimensions to define a suitable core. That core is banded about a transverse perimeter and then submitted to a reaction injection molding process by which urethane or other suitable polymers impregnate the various voids, holes and cracks in the core, bond with the bands, and define a finish unit having the overall size and configuration of previously known railroad ties. The encapsulated product is then capped or plugged at the ends to ensure that the resulting product is impervious to penetration by the environment.
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