Railways: surface track – Roadbed – Street crossing
Patent
1987-07-14
1988-12-27
Chambers, A. Michael
Railways: surface track
Roadbed
Street crossing
E01B 100
Patent
active
047935456
ABSTRACT:
An embedded track construction for a transit railway including first and second parallel, spaced rails extending an indefinite length in a first longitudinal direction. A composite insert assembly extends along the indefinite length of the rails to electrically insulate the track rails from the surrounding ground surface. The composite insert also provides a positive water seal and allows lateral movement of the rail. The inserts include a first generally rigid channel and an elastomeric member received thereon. The rigid channel preferably defines an inverted, generally U-shaped configuration in which one leg is interposed between the top and bottom flanges of the rails. A second leg abuttingly engages conventional support ties that are perpendicularly disposed to the transit rails. Gauge side inserts include a cut-out formed in the elastomeric member to receive an associated wheel flange. The inserts facilitate crossing of the railway in a transverse direction, as well as travel in the longitudinal direction by emergency vehicles or the like.
REFERENCES:
patent: 1755698 (1930-04-01), Lish
patent: 3469783 (1969-09-01), Uralli et al.
patent: 3955761 (1976-05-01), Szarka et al.
patent: 4289273 (1981-09-01), Schmidt
"Saf&dri Railroad Grade Crossings" Structural Rubber Products Co., p. 4, 10/82.
"Goodyear Super-Cushion Rubber Crossings for Highways", Goodyear Tire and Rubber Co. 07/85.
Chambers A. Michael
Construction Polymers Company
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