RAILYWAY SLEEPERS
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United States of America Patent
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N/A
Issued Date -
Sep 18, 2014
app pub date -
Mar 14, 2013
filing date -
Mar 14, 2013
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A dimensionally stable combination of wood and inorganic material is provided as railway sleepers or ties. The wood is preferably a softwood impregnated with an alkali-metal or alkaline earth-metal silicate solution, which has been rendered water insoluble after impregnation. Preferably sodium silicate (water glass) is used as the solution. Any cracks, gaps, shakes, splits, or the like, remaining after impregnation are filled so as to deny entry of water, ice, snow, and debris into such cracks, etc. Predrilled holes in the ties receive deeply threaded railway spikes, capped by a hexagonal cap to hold the rails. Preferably, the spikes and caps are coated with a similar solution to provide both corrosion protection and strong bonding of the components.
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