Patent · US Expired

Drilling apparatus

US4448263A · kind A · utility

3Cited by

8References

20Claims

0Family size

Assignee

Gewerkschaft Eisenhutte Westfalia GmbH · DE

Inventors

Kunibert Becker · Werl, DE
Rudiger Kirchbrucher · Holzwickede, DE
Burckhard Elsner · Grafenau, DE

Key dates

Filing date	Nov 24, 1981
Grant date	May 15, 1984
Priority date	—
Expiry date	Nov 24, 2001

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B15/006
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A mineral mining installation comprises a mine roof support assembly and apparatus for drilling bores. The roof support assembly comprises a plurality of roof support units positioned side-by-side, and the drilling apparatus comprises a drilling device which is movably guided on a track associated with the roof support assembly. Each of the roof support units has at least one roof bar. The track is arranged on the underneath sides of the roof bars of the roof support units. The drilling device is pivotally mounted on a trolley which is movably guided on the track.

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