Pipe usable particularly for transporting fluids and allowing the permeability to the fluids transported to be limited
US4903735A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 8, 1987 |
| Grant date | Feb 27, 1990 |
| Priority date | — |
| Expiry date | Apr 8, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L2011/047
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Disclosed is a rigid or flexible conduit usable particularly for transporting fluids and enabling to limit the permeability to transported fluids. According to the invention, the conduit comprises at least an inner flexible sheath (1) made of thermoplastic, elastic, or rubber material and an outer sheath (10) comprising a metal layer (3) and arranged around said inner sheath (1). Said metal layer comprises at least a layer of flat metal band (3) which is spirally wound with a winding angle .alpha. higher than 50.degree. and lower than 90.degree. with respect to the axes of the conduit. For rigid conduits, said metal layer (3) is adhered to said inner flexible sheath (1) on the major part of the width of the band (3). For flexible conduits, the turns present superposition areas so as to provide for a complete covering of said inner sheath (1), the superposition areas (30) of the band turns on one hand and the areas comprised between said superposition areas on the other hand, having each a width at least equal to amplitude of the deformation imposed to the outer sheath by the maximum bending or traction of the conduit. Application particularly to the transportion of corrosive fluids…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.