Resilient ballast underlayment mat including nonwoven fiber fleece layers
AssigneeClouth Gummiwerke Aktiengesellschaft
InventorHermann Ortwein
Life of this patent
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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.
Claims5
In a road bed for railway rails, a sound-damping support assembly for the rails which consists of the combination of a ballast underlayment mat and a stone ballast on top of said mat, wherein said mat consists essentially of a body of elastomeric material formed at a bottom side thereof with prominent and projecting parts of said elastomeric material and at an upper side thereof with at least one layer consisting of a fiber fleece of nonwoven fiber limiting penetration of the stone ballast into the elastomeric material, a plurality of spaced apart layers of said fiber fleece of nonwoven fiber being provided at said upper side of said mat and said layers of fiber fleece being separated from one another by an intermediate resilient layer.
In a road bed for railway rails, a sound-damping support assembly for the rails which consists of the combination of a ballast underlayment mat and a stone ballast on top of said mat, wherein said mat consists essentially of a body of elastomeric material formed at a bottom side thereof with prominent and projecting parts of said elastomeric material and at an upper side thereof with at least one layer consisting of a fiber fleece of nonwoven fiber limiting penetration of the stone ballast into the elastomeric material, a cover layer of an elastomeric material being provided on said mat above said fleece layer and between said stone ballast and said fleece layer.
Dependencies are inferred from the claim text.