Pneumatic construction or bridging element
US6874192B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 27, 2002 |
| Grant date | Apr 5, 2005 |
| Priority date | — |
| Expiry date | Mar 27, 2022 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01D15/20
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The structural or bridge element is constructed from a sheath (1) made of textile fabric, preferably of low extensibility, which is covered in an airtight manner with a flexible plastic. Secured longitudinally within the sheath 1 are a plurality of textile webs of low extensibility in an assembly of mutually parallel planes. The thread profile of first layers 4 of the fabric of the webs 3 is turned through approximately 45° in relation to the longitudinal axis of the bridge element. Second layers 5, each arranged within the same web 3 as the first layer 4, have a thread profile which is selected to be parallel and perpendicular to the longitudinal axis of the bridge element. Bars 6 are arranged on the outside of the sheath 1, respectively in each plane of the webs 3, and are secured within shackles on the sheath 1. The sheath 1 is supplied with compressed air within the range of a few 100 mB. Wherever the bridge element is laid onto the ground of a cutting 8, the sheath 1 is strengthened by means of a protective covering 9.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.