Patent · US Expired

Hollow cutting head

US4289357A · kind A · utility

11Cited by

1References

9Claims

0Family size

Assignee

Voest-Alpine · AT

Inventors

Rudolf Hintermann · Zeltweg, AT
Alfred Zitz · Zeltweg, AT
Otto Schetina · Zeltweg, AT
Herwig Wrulich · Zeltweg, AT

Key dates

Filing date	Jan 16, 1980
Grant date	Sep 15, 1981
Priority date	—
Expiry date	Jan 16, 2000

Classification

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

Abstract

The cutting head (6) is a hollow cutting head and rotatably supported on a carrier (11). Water is supplied to the nozzles of the cutting head (6) via a supply tube (29) rigidly connected to the carrier (11) in the axis of rotation and opening into a distribution chamber (30) within the cutting head (6). From this distribution chamber (30) the water is fed via passages into annular gaps (43, 46) extending in axial direction. Passages (47, 48) are opening into these annular gaps (43, 46) for supplying the water to the nozzles. A sealing (31) is only required where the water supply tube (29) is opening into the distributing chamber (30).

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