| 摘要 |
he invention relates to an oscillatory safety keel 1 resiliently attached to the craft not with long screws but with INOX blades 4 (fig. 1,2,4) whose thickness is analogous to the weight of the keel 1, which blades embrace the keel from both sidesand are connected with INOX pins 7 (fig.1) adapted but not caulked into the INOX cylinders 6 (fig.3) so that same pins 7 can rotate therein at the moment of crushing of the keel 1 which, being oscillating, is in position to absorb the crushing forces what is achieved by similar linkage of each blade 4, by way of the pin 7 and the safety nut 8, to the false keel 2 (extremity of a plastic craft whereto the keel is attached) and the keel 1(fig.1). |
