Patent · US Expired

Tensioning a longwall mineral mining installation

US4169689A · kind A · utility

7Cited by

5References

29Claims

0Family size

Assignee

Gewerkschaft Eisenhutte Westfalia GmbH · DE

Inventors

Walter Weirich · Dortmund, DE
Michael Dettmers · Kamen, DE
Christoph Rassmann · Grafenau, DE
Willi Heyer · Bochum, DE
Herbert Beyer · Werne, DE
Horst Linke · Grafenau, DE

Key dates

Filing date	Mar 22, 1978
Grant date	Oct 2, 1979
Priority date	—
Expiry date	Mar 22, 1998

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21F13/10
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

Mining apparatus comprises a longwall conveyor and tensioning means for tensioning the conveyor in its longitudinal direction. The tensioning means is constituted by a plurality of hydraulic tensioning rams, each of which is mounted, in use, by means of pivot joints at each end thereof directly between the conveyor and a respective roof support unit of a roof support assembly. Each tensioning ram extends at an acute angle to the longitudinal axis of the conveyor. The tensioning rams are positioned in two groups, one in each end zone of the conveyor.

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