Patent · US Expired

Tunnel driving apparatus

US4432665A · kind A · utility

5Cited by

8References

8Claims

0Family size

Assignee

Gewerkschaft Eisenhutte Westfalia GmbH · DE

Inventors

Dieter Stuckmann · Selm, DE
Herbert Heitkamp · Werne, DE

Key dates

Filing date	Aug 28, 1981
Grant date	Feb 21, 1984
Priority date	—
Expiry date	Aug 28, 2001

Classification

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

Abstract

Apparatus for use in driving tunnels or the like comprises a front drive shield composed, for example, of elongate cutter knives supported for longitudinal displacement on a frame. In order to control turning motion of the shield the shield is connected via hydraulic control rams to a rear abutment such as a follow-up ring structure. The rams are all inclined relative to the longitudinal axis of the apparatus. The rams are divided into two groups inclined in opposite directions and the rams of each group can be subjected collectively to pressure fluid to impart a corrective torque to the frame.

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