Shield tunnel boring machine
US5697676A · kind A · utility
18Cited by
10References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 17, 1995 |
| Grant date | Dec 16, 1997 |
| Priority date | — |
| Expiry date | Nov 17, 2015 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21D9/08
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A shield tunnel boring machine having a parallel link excavator includes excess excavating cutters joined to the excavator and divided into a plurality of steps. The excess excavating cutters of the respective steps are coupled to separate corresponding jacks that are actuatable and controlled independently of each other for allowing the position of the machine to be effectively controlled to be able to quickly correct any undesired change in direction of the tunnel boring operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.