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US 4,256,146 AGranted
Flexible composite tube
AssigneeCoflexip
InventorsMaurice Genini, Christian Athe, Jean-Paul Aubert
Life of this patent
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Abstract
A composite flexible tube is disclosed. The central portion of the core of the tube is formed of a plurality of hollow elements dipsosed concentrically about the longitudinal axis of the tube.
Claims4
A composite flexible tube comprising a central alveolar element, an external watertight sheath, and a sheet of metal between said central alveolar element and said external watertight sheath,
- wherein said central alveolar element comprises a plurality of hollow metal elements, the cross-section of each of the hollow metal elements having the appearance of a triangle, wherein each hollow metal element is disposed side by side, whereby the line of intersection of each apex of each hollow metal element extends along the longitudinal axis of the tube, and wherein each of the hollow metal elements is formed of a folded, unsoldered metal sheet, said hollow metal elements being wound in a helix.
Dependencies are inferred from the claim text.