Patent · US Expired

Shield advancing machine

US4805963A · kind A · utility

8Cited by

4References

7Claims

0Family size

Assignee

Voest-Alpine · AT

Inventors

Peter Kogler · Zeltweg, AT
Berthold Scheiber · Zeltweg, AT
Wulf Martin · Großlobming, AT
Herwig Wrulich · Zeltweg, AT

Key dates

Filing date	Oct 1, 1986
Grant date	Feb 21, 1989
Priority date	—
Expiry date	Oct 1, 2006

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21D9/0875
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A shield advancing machine, comprising cutting tools (15) rotatably supported on cantilever arms (13, 14) being rotatable around an axis approximately extending in advancing direction and being swivellable in transverse direction to this axis, has a carrier (4) which is guided and supported in axial direction of the shield (1). A rotation drive (22, 33) for a rest (9) of the cantilever arms (13, 14) is provided on the carrier (4), and the cantilever arms (13, 14) as well as their swivel drive (16, 17) are linked to the rest (9).

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