| 摘要 |
This present utility patent concerns a system of coupling keel for surfboards, which is comprised by keel 1 and lodging 2 with vertical crack 3, retention layer 4, branches 5, lower ended by a closing layer 6 and higher opening 7, by which each tongue-like part 8 of the keel 1 penetrates, and fastening screw 9 of the keel 1, whose contact edge will be lodged in the screw thread 10 of each tongue-like part. Each lodging is provided with saw-edged internal surface 11, in the vertical crack 3, and each keel 1, with tongue-like parts 8, with external face 12 corresponding to the same saw-edged surface, which couple to preserve the original arrangement designed by the manufacturer, and lodgings with external grooves 13, which reduces the possibility of pulling. The keel is provided with the insertion of a little radius or rounded surface 14 between each of the longitudinal faces of the tongue-like parts, wherever it is possible, and the base of the keels, thereby dissipating the accumulation of tension generated and considerably reducing the occurrence of cracks and consequent breaks in this area.
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