Flexible conduit with high inertia hoop
US6415825B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 5, 2001 |
| Grant date | Jul 9, 2002 |
| Priority date | — |
| Expiry date | Apr 5, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1393
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The invention concerns a flexible tubular pipe comprising, from inside outwards, a web (1) made of interlocked steel strips, an inner impervious sheath (2) in polymer material, a short-stepped helical winding of interlocked forming wire (3) arranged above the internal sheath (2), at least a hoop (4) consisting of a short-stepped metal wire winding without interlock, at least a long-stepped tractive armouring layer (5) wound around the pressure vault and an outer polymer protective and sealing sheath (8); the sickness (Ef) of the hoop (4) is greater than the thickness (Ez) of the metal forming wire (3), preferably by one to three times.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.