Method for restoring used railroad ties and the restored railroad ties formed thereby
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United States of America Patent
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Sep 14, 1999
Grant Date -
N/A
app pub date -
Jun 9, 1997
filing date -
Jun 9, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
This invention provides a method for restoring at least one means defining a railroad spike hole located in a used railroad tie. In this way, the restored railroad tie can be reused in subsequent rail replacement operations. The restored railroad tie is capable of having a railroad spike penetrate and be retained within the confines of the restored railroad spike hole without substantial bending problems. The used railroad tie provided has at least one spike hole located therein. In each the means defining a railroad spike hole is formed a polymeric plug. The polymeric plug comprises a substantially non-foaming, non-cellular polymeric material. The polymeric material preferably comprises a polyurethane. The polymeric plug infiltrates and tightly bonds with the railroad spike hole to prevent moisture infiltration. Thus, substantial tie rot due to moisture is impeded, and the leaky railroad spike hole is effectively and efficiently dammed to enable complete filling thereof. The polymeric plug is capable of penetration by and retention of the railroad spike therewithin.
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