Patent · US Expired

Railway road bed

US4500037A · kind A · utility

24Cited by

4References

11Claims

0Family size

Assignee

Clouth Gummiwerke Aktiengesellschaft · DE

Inventors

Hans Braitsch · Bensberg, DE
Hermann Ortwein · Bocholt, DE
Josef Vorwald · Cologne, DE

Key dates

Filing date	May 28, 1982
Grant date	Feb 19, 1985
Priority date	—
Expiry date	May 28, 2002

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE01B2204/01
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A railroad bed has an elastomeric mat which supports the ballast and on which the sleepers and rails are mounted. The mat has an upper surface formed by a metal or plastic sheet which prevents penetration of the ballast into the elastomeric body.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.