COMPOSITE STRUCTURE FOR RAILROAD TIES AND OTHER STRUCTURAL MEMBERS AND METHOD FOR THEIR MANUFACTURE
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United States of America Patent
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Issued Date -
Jun 30, 2011
app pub date -
Dec 30, 2009
filing date -
Dec 30, 2009
priority date (Note) -
Abandoned
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Abstract
A laminated and encapsulated railroad tie structure and its associated method of manufacture. A wood core of laminated wood slats is inserted into an extruded sleeve of scrap tire rubber and polyurethane. A urethane adhesive laminates the wood slats together and serves as a lubricant and bonding agent for placement and secured engagement of the sleeve about the core. End caps are securedly engaged at each end of the composite, being secured to both the wood core and sleeve. The bottom and side surfaces of the sleeve are characterized by longitudinal grooves or slots for engagement with a railroad bed.
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