Railways: surface track – Roadbed
Patent
1986-02-21
1988-01-19
Reeves, Robert B.
Railways: surface track
Roadbed
428285, 404 31, E01B 100, B32B 1702
Patent
active
047200430
ABSTRACT:
A road bed for railway rails comprises a ballast underlayment mat in the form of a body of elastomeric material. The mat has, at its bottom, prominent projecting parts of the elastomeric material and is covered by stone ballast. At least one fiber fleece layer on the top of the mat limits penetration of the stone ballast into the elastomeric material.
REFERENCES:
patent: 2165955 (1939-07-01), Haarhoff
patent: 3568579 (1971-03-01), Hoad
patent: 3587964 (1971-06-01), Cork
patent: 4025686 (1977-05-01), Zion
patent: 4235371 (1980-11-01), Kohler
patent: 4311273 (1982-01-01), Marsh
patent: 4353947 (1982-10-01), Northcut
patent: 4362780 (1982-12-01), Marzocchi et al.
patent: 4368844 (1983-01-01), Miller
Clouth Gummiwerke Aktiengesellschaft
Dubno Herbert
Pido John
Reeves Robert B.
Ross Karl F.
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