Patent · US Expired

Mineral winning plough

US4548444A · kind A · utility

3Cited by

2References

10Claims

0Family size

Assignee

Gewerkschaft Eisenhutte Westfalia GmbH · DE

Inventors

Oswald Breuer · Lichtenau, DE
Norbert Hesse · Bochum, DE
Bernd Steinkuhl · Grafenau, DE

Key dates

Filing date	Jun 15, 1983
Grant date	Oct 22, 1985
Priority date	—
Expiry date	Jun 15, 2003

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21C31/08
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A plough for winning material (such as coal) from a face has a plough body which supports a carrier for roof-level cutters. Means are provided for adjusting the vertical position of the carrier with respect to the plough body. The adjustment means comprises a worm mounted on the plough body, and a toothed rack associated with the carrier. The worm meshes with the toothed rack. The worm is driven through a reduction gear which is located on the goaf side of the carrier.

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