Railway level crossing

Claim 2

A railway level crossing comprising two spaced apart rails constituting the rail track at the crossing and a road surface between the rails substantially at the level of the top surfaces of the rails, wherein an unyielding bed is provided between the rails and, at least adjacent each of the rails, the said road surface between the rails being provided with at least one flexible plate which is supported by said unyielding bed and has an edge portion extending to closely adjacent the rail, said edge portion not being directly supported by said unyielding bed whereby said edge portion can bend downwardly when engaged by a flange of a flanged wheel passing along the rail, there further being provided resilient means supporting said edge portion of the flexible plate and adapted resiliently to restore said edge portion to its normal position when the flanged wheel has passed, said resilient means comprising at least one gas-filled sealed tube of flexible material extending beneath the said edge portion of the flexible plate parallel to the rail and supported by a base.

Claim 3

A railway level crossing according to claim 1 wherein a single said tube extends parallel to the rail across the full width of the road.

Claim 4

A railway level crossing according to claim 1 wherein a plurality of said gas-filled sealed tubes are arranged end-to-end across the full width of the road.

Claim 5

A railway level crossing comprising two spaced apart rails constituting the rail track and having top surfaces; a road surface between the rails substantially at the level of said top surfaces; at least one flexible plate of elastomeric material providing a portion of said road surface adjacent each rail, at each rail said plate having an edge closely adjacent said top surface of the rail whereby the top surface of the rail and the road surface between the rails are substantially continuous; a bed of elongate rigid beams lying between the rails and supporting said flexible plates, there being a gap between a lateral edge of said bed of beams and each rail whereby the said plate can flex downwardly to allow passage of a flange of a wheel on the rail; said beams being downwardly rounded towards the rail adjacent each of said gaps; at least one gas-filled closed tube located in each of said gaps extending parallel to the rail and providing resilient support of said plate whereby the plate is returned to its normal position after passage of a flange; and rigid support means beneath said tube.

Claim 6

A railway level crossing comprising two spaced apart rails constituting the rail track and having top surfaces; a road surface between the rails substantially at the level of said top surfaces; at least one flexible plate of elastomeric material providing a portion of said road surface adjacent each rail, at each rail said plate having an edge closely adjacent said top surface of the rail whereby the top surface of the rail and the road surface between the rails are substantially continuous; a bed of elongate rigid beams lying between the rails and supporting said flexible plates, there being a gap between a lateral edge of said bed of beams and each rail whereby the said plate can flex downwardly to allow passage of a flange of a wheel on the rail; said beams being downwardly rounded towards the rail adjacent each of said gaps; at least one gas-filled closed tube located in each of said gaps extending parallel to the rail and providing resilient support of said plate whereby the plate is returned to its normal position after passage of a flange; and rigid support means beneath said tube.