Patent · US Expired

Cutting head for drift advancing machines and process for producing same

US4572583A · kind A · utility

4Cited by

4References

8Claims

0Family size

Assignee

Voest-Alpine · AT

Inventors

Gottfried Traumumiller · Zeltweg, AT
Wilfried Maier · Eppingen, DE
Franz Schoffmann · Leoben, AT
Herwig Wrulich · Zeltweg, AT

Key dates

Filing date	Sep 2, 1983
Grant date	Feb 25, 1986
Priority date	—
Expiry date	Sep 2, 2003

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21C35/23
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

For the supply of water to nozzles on the circumference of a cutting head there are, within a cutting head (1) composed of individual discs (2), provided bores (14 respectively 16) extending in direction to the axis of rotation of the cutting head (1). The individual annular discs (2) are connected one with the other by welding, the weld beads extending over a radial area (a) of the cutting head which is greater than the diameter (b) of the bores (14 respectively 16). The bores (14 respectively 16) extend through the weld beads (19) (FIG. 2).

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