Railways: surface track – Rail seats – Cushions
Patent
1995-06-07
1996-09-03
Morano, S. Joseph
Railways: surface track
Rail seats
Cushions
E01B 962
Patent
active
055516327
ABSTRACT:
In a railroad track comprising a railroad rail having a lower flange, a railroad tie made from concrete, and a polyurethane pad mounted between the lower flange of the railroad rail and an upper surface of the railroad tie, a particulate layer is interposed between the polyurethane pad and the railroad tie and comprises particles bonded to the polyurethane pad. Preferably, the bonded particles are polycarbonate, acrylic, or nylon particles, either granules or fibers. Alternatively, the bonded particles are particles of quartz, silica sand, silicon carbide, or aluminum oxide. An adhesive layer is interposed between the polyurethane pad and the railroad tie, comprises a methacrylate ester composition, and is bonded to particles among the bonded particles and to the railroad tie, whereby the polyurethane pad and the railroad tie are bonded to one another via the particulate and adhesive layers.
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Abt Daniel C.
Golinkin Herbert S.
Kish Frederick A.
Illinois Tool Works Inc.
Morano S. Joseph
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