Pipes and tubular conduits – Flexible – Braided – interlaced – knitted or woven
Reexamination Certificate
2004-10-29
2011-12-27
Hook, James (Department: 3754)
Pipes and tubular conduits
Flexible
Braided, interlaced, knitted or woven
C138S130000, C138S132000, C138S135000
Reexamination Certificate
active
08082954
ABSTRACT:
A flexible pipe for transporting a fluid in a marine environment. The pipe comprises a liner for confining the fluid, an armoring layer surrounding the liner, and an outer protective sheath surrounding the armoring layer and allowing radial expansion and contraction of the armoring layers. The outer protective sheath comprises at least two protective layers of helically wound composite wires with essentially opposite winding angles and locally held together, providing a relatively flexible yet fixed structure of the outer sheath. The outer sheath is held together in an array of discrete spots or along linear or curved paths. Flexibility is maintained because the stiffness in shear in the wires of adjacent protective layers may be made much larger in areas being locally held together than outside these areas. This allows a change of angles between the wires of two adjacent layers of the outer protective sheath during elongation or shortening of the pipe.
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Hook James
NKT Flexibles I/S
Pearne & Gordon LLP
LandOfFree
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