High Speed, Increased Hydrodynamic Efficiency, Light-Weight Molded Trawl Door and Methods for Use and Manufacture
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United States of America Patent
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Issued Date -
Dec 18, 2008
app pub date -
Jul 18, 2005
filing date -
Jul 26, 2004
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A trawl door having enhanced and rather high efficiency, lightness of weight in water and ease of manufacture. The trawl door preferably includes at least one slat and preferably two slats (6, 7) disposed forward of the leading edge (31) of a single main deflector body (2), and the main deflector has a profile wherein: (I) the outer side surface (28) of said main deflector body exhibits greater camber than does the inner side surface (29) of said main deflector body; (II) the thickest part of the profile of said main deflector body is located front of center; and (III) the outer side surface (28) is convex and the inner side surface (29) is concave. In one aspect the trawl door of the invention including at least a synthetic portion, preferably a mixture of a polyamide and an elastomer, whereby the synthetic material forming the at least a synthetic portion of the trawl door receives impacts fracture free.
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