It includes a surfboard body, a fin box, a fin seat, and multiple screw members. The fin box is embedded with the surfboard body and has a box recess and box holes. Each box hole has several circular slots. The fin seat has a fin and securing portions. Each securing portion 5 has several curved plates for enclosing a receiving space. Each screw member has a tapered portion with an outer threaded portion. When the screw member is rotated in, these curved plates will gradually expand outwards and force the outward protruded portions engaging into the corresponding circular slots. So, the fin seat and the fin box are engaged together. When the screw member is rotated out, the fin seat and the fin box can be separated. About this o invention, the fix seat and the fin box can be firmly secured together. Plus. its fin seat can be replaced easily.
SURFBOARD HAVING A FIN
2018-07-19
Patent
Electronic Resource
English
IPC: | B63B Schiffe oder sonstige Wasserfahrzeuge , SHIPS OR OTHER WATERBORNE VESSELS |