Telescopic tunnel form
US6619885B2 · kind B2 · utility
1Cited by
12References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 21, 2001 |
| Grant date | Sep 16, 2003 |
| Priority date | — |
| Expiry date | Sep 21, 2021 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04G11/02
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The invention relates to a tunnel form comprising: two vertical forming walls (2) joined by a horizontal wall (3) in two parts (3A), and at the base of the form, means for adjusting the height of the position of the top edge (5) of the tunnel form relative to the reference surface (6), and means of support (7) at least indirectly with the reference surface so that it can be extracted from the tunnel after production. This tunnel form is characterized in that the aforementioned height adjusting means (4) are supported by props (9), each slide-mounted in a sleeve (10) attached to the base of the tunnel form.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.