Patent · US Expired

Apparatus for the mining of mineral matter, especially coal

US5110187A · kind A · utility

5Cited by

2References

18Claims

0Family size

Assignee

Bochumer Eisenhütte Heintzmann GmbH & Co. KG · DE

Inventors

Peter Heintzmann · Bochum, DE
Karl-Heinz Berger · Herten, DE
Peter Walbrodt · Hünxe, DE

Key dates

Filing date	Mar 7, 1991
Grant date	May 5, 1992
Priority date	—
Expiry date	Mar 7, 2011

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21D23/142
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A mining apparatus of the type in which a mining machine excavates a mining face, especially a coal face in a subterranean mining application, and has a plurality of emitters of electromagnetic waves of different character diverging toward receivers on the individual walking props. The walking props are provided with a control unit which, in response to leading and trailing zones of the respective magnetic beams and/or an overlap region of the two beams, causes the advance of the walking prop as the mining machine travels past it to follow the excavation of the mining face.

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