Patent · US Expired

Method for cutting minerals and cutting machine

US4111488A · kind A · utility

7Cited by

4References

11Claims

0Family size

Assignee

Vereinigte Osterreichische Eisen- und Stahlwerke - Alpine Montan Aktiengesellschaft · AT

Inventors

Siegfried Sigott · Ferlach, AT
Alfred Zitz · Zeltweg, AT
Herwig Wrulich · Zeltweg, AT

Key dates

Filing date	Sep 1, 1976
Grant date	Sep 5, 1978
Priority date	—
Expiry date	Sep 1, 1996

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21D9/1026
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

In a method and apparatus for cutting minerals utilizing a cutting tool provided with cutting teeth, the tool rotates about an axis approximately parallel to the winning face and is moved at a feeding rate essentially in axial direction. Several grooves spaced from each other are carved in sequence, and in dependence on the mineral properties the feeding rate is increased with respect to the rotatory velocity when a brittle mineral is to be cut, while the feeding rate is diminished with a tough mineral.

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