Railways: surface track – Roadbed – Street crossing
Patent
1988-03-01
1989-08-29
Reeves, Robert B.
Railways: surface track
Roadbed
Street crossing
404 32, E01C 904
Patent
active
048609528
ABSTRACT:
Elastic plates for level railroad crossings have rail-adjacent edges which are profiled in their vertical cross sections to provide the required interlock. The plates have a first pair of grooves in the top and the bottom of the plate running parallel to the rail and have a second pair of upper and lower parallel grooves in the top and the bottom of the plate running transverse to the rail. In each pair of grooves, the groove in the top of the plate is laterally offset with respect to a parallel groove in the bottom of the plate, and each pair of grooves forms an expansion and contraction crease therebetween. Pairs of grooves in the top and the bottom of the plate are spaced, so that the distances between individual expansion creases, or between expansion creases formed by groups of creases, are large relative to the distance between the grooves which constitute the expansion creases. The first and second pairs of grooves intersect one another and in order to prevent an aperture or opening from being formed in the plate at the points of intersection, an integral layer of material is provided at each intersection to seal between the upper and lower sides of the plates.
REFERENCES:
patent: 3414194 (1968-12-01), Seltzinger et al.
patent: 3465963 (1969-09-01), Caillet et al.
patent: 3843051 (1974-10-01), Whitlock
patent: 4093120 (1978-06-01), Canfield
patent: 4117927 (1978-10-01), Whitlock
patent: 4236670 (1980-12-01), Limmergard et al.
patent: 4289273 (1981-09-01), Schmidt
patent: 4421272 (1983-12-01), Whitlock
Gummiwerke Kraiburg Elastik Beteiligungs GmbH & Co.
Pape Joseph D.
Reeves Robert B.
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