Patent · US Expired

Mine roof support assembly

US4184791A · kind A · utility

2Cited by

3References

12Claims

0Family size

Assignee

Gewerkschaft Eisenhutte Westfalia GmbH · DE

Inventors

Kunibert Becker · Werl, DE
Burghardt Elsner · Grafenau, DE
Gunter Lagodka · Grafenau, DE

Key dates

Filing date	Nov 30, 1977
Grant date	Jan 22, 1980
Priority date	—
Expiry date	Nov 30, 1997

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21D23/0409
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A mine roof support assembly comprises three basically similar mine roof support units positioned in a side-by-side relationship along a beam. The central unit is fastened to the beam for movement therewith, and the two outer units are flexibly connected to the beam by respective guide rod assemblies. Each of the outer units is provided with an alignment device, such as a short working stroke hydraulic ram, which acts on the beam in the direction of the longitudinal axis of the beam.

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