Patent · US Expired

Ballast-free permanent rail way having recessed tie with central fastening element

US5435486A · kind A · utility

3Cited by

3References

22Claims

0Family size

Assignee

Walter Bau-Aktiengesellschaft · DE

Inventors

Rudolf Gerlach · Sigmaringendorf, DE
Ralf Walter · Zeitlarn, DE
Bernhard Schad · Augsburg, DE
Gunther Leykauf · Munich, DE
Josef Eisenmann · Munich, DE

Key dates

Filing date	Apr 21, 1994
Grant date	Jul 25, 1995
Priority date	—
Expiry date	Apr 21, 2014

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE01B2204/13
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

To make a ballast-free permanent rail way, an asphalt base is applied to a substructure comprised of concrete. Railway ties, which have a recess in the center on their underside, are laid on the asphalt base. In order to secure the ties against transverse forces and to assure accurate fitting and wear-free anchoring, the ties have a first bore in the center and the substructure has a blind bore. The blind bore is filled with an adhesive and then a dowel or a threaded rod is inserted into the blind bore which passes through a sliding spacer sleeve inserted into the first bore.

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