Coverbraided rope for pelagic trawls
AssigneeHampidjan hf
InventorSherif Adham Safwat
Life of this patent
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Abstract
A rope has a braided sheath that includes a spiraling strand having a greater pitch in comparison with a pitch exhibited by other strands of a coverbraid that encloses that rope's strength member core. The rope is useful for forming pelagic trawl mesh, and is stronger for a given amount of material, has less drag, and exhibits the same or bettered lift when towed through water at trawl mesh angles of attack. The rope also is less costly to manufacture in comparison to known helix rope constructions.
Claims24
An improved rope (35) for forming portions of a trawl, the rope including at least one strength member (37), at least a braided sheath (398) formed about and enclosing the strength member (37), and at least one spiraling strand (36) where such spiraling strand (36) is larger in diameter than other strands (397) forming at least portions of the braided sheath (398), the rope characterized in that the spiraling strand is a preformed strand that is adhered to the outside of the braided sheath (398);
- and by an amount of advance of the spiraling strand (36) in one turn about the strength member core (37) differing from an amount of advance of a strand (397) in one turn about the strength member core (37).
A process for forming an improved rope (35) for forming portions of a trawl, the rope including at least one strength member (37), at least a braided sheath (398) formed about and enclosing the strength member (37), and at least one spiraling strand (36) where such spiraling strand (36) is larger in diameter than other strands (397) forming at least portions of the braided sheath (398), the process comprising a step of preforming the spiraling strand (36), followed by a step of adhering the preformed spiraling strand (36) to the outside of the braided sheath while selecting an amount of advance for the spiraling strand (36) in one turn about the strength member core (37) different in comparison to an amount of advance selected for a strand (397) in one turn about the strength member core (37).
Dependencies are inferred from the claim text.