EP 0281013 B1 19910828 - FLEXIBLE SLAB FOR RAILROAD LEVEL-CROSSINGS
Title (en)
FLEXIBLE SLAB FOR RAILROAD LEVEL-CROSSINGS
Publication
Application
Priority
DE 3707305 A 19870306
Abstract (en)
[origin: US4860952A] 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.
IPC 1-7
IPC 8 full level
CPC (source: EP US)
E01C 9/04 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0281013 A2 19880907; EP 0281013 A3 19890510; EP 0281013 B1 19910828; AT E66707 T1 19910915; DE 3707305 A1 19880915; DE 3864420 D1 19911002; ES 2025715 T3 19920401; JP H059564 B2 19930205; JP S63251501 A 19881019; US 4860952 A 19890829
DOCDB simple family (application)
EP 88102774 A 19880225; AT 88102774 T 19880225; DE 3707305 A 19870306; DE 3864420 T 19880225; ES 88102774 T 19880225; JP 5341588 A 19880307; US 16257088 A 19880301