B - Operations – Transporting – 63 – B
Patent
B - Operations, Transporting
63
B
114/38
B63B 3/38 (2006.01) B63B 35/79 (2006.01)
Patent
CA 1186181
(42 552) INVENTION: AN APPARATUS FOR THE STABILIZING OF THE DIRECTION OF TRAVEL OF WATERCRAFT, SPECIFI- CALLY A SWORD OR FIN FOR WIND SURFING BOARDS ABSTRACT OF THE DISCLOSURE The present invention relates to an apparatus for the stabilizing of the direction of travel of water- craft. The invention relates specifically to a sword or fin for wind surfing boards. In order to allow the wind- profile like shape of the apparatus to adjust itself in accordance with a prevailing velocity of flow or a pre- vailing flow thereagainst the apparatus comprises two deformable side walls which are mounted to a rigid and stiff center wall exclusively at an area located at the leading edge thereof in relation to the direction of flow. These side walls enclose together with the two oppositely arranged surfaces of the center wall two void spaces. Depending on the prevailing pressure situations between the luff side and the leeward side an optimal hydrodynamic flow profile is automatically generated. According to preferred embodiments the trailing edge of the apparatus comprises vacuum pumps which communicate -A1- with the void spaces, which vacuum pumps are present in form of water jet pumps. This allows additionally a controlling of the profile corresponding and in dependence from the velocity of flow. - A 2 -
406518
Kirby Eades Gale Baker
Mistral Windsurfing Ag
LandOfFree
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