Patent · US Expired

Control systems for mineral mining installations

US4451181A · kind A · utility

7Cited by

8References

5Claims

0Family size

Assignee

Gewerkschaft Eisenhutte Westfalia GmbH · DE

Inventors

Thomas Trumper · Werne, DE
Harry Rosenberg · Philadelphia, US
Walter Weirich · Dortmund, DE

Key dates

Filing date	Mar 24, 1982
Grant date	May 29, 1984
Priority date	—
Expiry date	Mar 24, 2002

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21D23/20
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

An electro-hydraulic control system for an underground mineral mining installation employs individual control assemblies and devices on a series of support units which are interconnected to one another and to a central control station via lines conveying electrical control signals. Manually-operable selector switches on the units enable groups of the support units to be operated in sequence at will by operating the switches of adjacent units outside the group.

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