Patent ID: 6374531
Filing Date: 2002-04-23
Classification: A01K

Abstract:
A trawl-system component selected from a group consisting of a trawl, upper bridles and frontropes adapted for use in a trawl system for bettering a performance characteristic of the trawl system, the trawl-system component comprising:a plurality of mesh cells, each mesh cell including a plurality of cell bars, at least portions of said cell bars exhibiting a hydrofoil-like effect during operation of the trawl system in a water environment that aids in bettering a performance characteristic of the trawl system, the cell bars having grooves arranged in a left-hand lay or a right-hand lay; that portion of the cell bars that exhibit the hydrofoil-like effect being oriented to establish leading and trailing edges, the leading edge of that portion of cell bars that exhibit the hydrofoil-like effect, when viewed in a receding direction: being on the right side of said cell bar when the cell bar grooves have a left-hand lay; and being on the left side of said cell bar when the cell bar grooves have a right-hand lay; and the movement of the cell bar through the water environment relative to a water flow vector creating a pressure differential across that portion of said cell bar that produces the hydrofoil-like effect thereby establishing a lift vector, the cell bars being oriented neither parallel nor perpendicular to the water flow vector.