Lining-frame of latticework construction for galleries, tunnels or the like
US4597239A · kind A · utility
4Cited by
5References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 10, 1984 |
| Grant date | Jul 1, 1986 |
| Priority date | — |
| Expiry date | Oct 10, 2004 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21D11/18
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A lining-frame for a gallery or tunnel comprises two planar latticework trussed arches, each comprising an inner belt (3,4) and an outer belt (1,2) interconnected by a zig-zag rod chain (5,6). The arches are fixed parallel to one another by planar connector elements (81a,82a:81b,82b).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.