Patent · US Expired

Tunnel drive shield

US4265565A · kind A · utility

5Cited by

13References

21Claims

0Family size

Assignee

Gewerkschaft Eisenhutte Westfalia GmbH · DE

Inventors

Dieter Stuckmann · Selm, DE
Hans Jutte

Key dates

Filing date	Sep 11, 1978
Grant date	May 5, 1981
Priority date	—
Expiry date	Sep 11, 1998

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21D9/0692
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A tunnel drive shield comprises a cylindrical shell supported by two axially-spaced frames. The two frames are movable, relative to one another, in the direction of tunnel advance. In order to guide the two frames accurately, guide means interconnect the two frames, the guide means permitting movement only in the direction of tunnel advance. The guide means may be constituted by a plurality of telescopic guide devices. A knife shield may constitute the drive shield.

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