Patent · US Expired

Mine roof supports

US4518284A · kind A · utility

2Cited by

3References

12Claims

0Family size

Assignee

Gewerkschaft Eisenhutte Westfalia GmbH · DE

Inventors

Kunibert Becker · Werl, DE
Rudiger Kirchbrucher · Holzwickede, DE
Klaus D. Pohlmann · Werne, DE

Key dates

Filing date	Mar 30, 1983
Grant date	May 21, 1985
Priority date	—
Expiry date	Mar 30, 2003

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21D23/0481
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A mine roof support has a goaf shield with a lemniscate guide system linking the shield to floor-engaging skids. A walking-mechanism is disposed in a channel between the floor skids. In order to prevent rubble or goaf material from penetrating into the channel the guides of the lemniscate system have connections which are spaced one above the other and to which one or several screen plates can be removably and replaceably attached with the aid of push-in locking-bars. The screen plates also advantageously serve to keep the floor skids apart by a minimum distance to prevent jamming of the walking mechanism.

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