Patent · US Expired

Apparatus for fastening rails to railroad ties

US4728031A · kind A · utility

4Cited by

9References

13Claims

0Family size

Assignees

Schwihag Gesellschaft fur Eisenbahnoberbau mbH · DE
Firma Karl Richtberg KG · DE

Inventors

Armin Heim · Ballarat, AU
Johannes Horn · Wiesbaden, DE
Karl-Heinz Schwiede · Kreuzlingen, CH

Key dates

Filing date	Jun 1, 1981
Grant date	Mar 1, 1988
Priority date	—
Expiry date	Jun 1, 2001

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE01B9/40
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

Apparatus for fastening rails on ties of a railroad comprising four rail screws for flushly mounting an abutment face of a bedplate against the upper surface of the tie and a pre-stressed, elastically deformable bedplate having a convex curved abutment face for frictionally engaging the upper surface of the tie and for applying a spring force against the rail screws when the rail screws are used to brace the curved abutment face flush against the tie.

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