Fin system for watercraft

摘要

An improved fin system for surfboards and other watercraft that utilizes a series of wide, flanged, fin boxes as a means of securing the fins into the base of the surfboard body. The fin boxes create a cantilever effect that provides additional strength and rigidity to the fins when compared to other available systems. Additionally, each fin tab of a fin can be installed into a self-contained fin box, thereby allowing for separation of the fin boxes once installed. The separation between the fin boxes permits increased longitudinal and torsional flex of the watercraft body when compared to a unitary fin box design.

主权项

1. A fin box, comprising:
an elongate slot, said elongate slot having a top open portion and a closed lower portion, said top open portion being adapted to receive a fin tab, said closed lower portion extending downward; a peripheral flange, said peripheral flange having an upper surface and a lower surface, said upper surface extends away from said top open portion of said elongate slot and surrounds said top open portion; a threaded hole, said threaded hole extending downward at an angle from said upper surface of said peripheral flange terminating through a lateral wall of said elongate slot; and, a primary cantilever foot, said primary cantilever foot emanating from said lower surface of said peripheral flange, having a main body that extends away in one direction from said closed lower portion of said elongate slot, wherein said main body portion has a plurality of arms of varying lengths that extend off from said main body.