Patent ID: 7244157
Filing Date: 2007-07-17
Classification: B63B

Abstract:
1. A fin for a water sports board comprising: a fin element having a fin base and a fin root section adjacent said fin base, and having a fin tip with a dimension between said fin root section and said fin tip, said fin element having a fin element leading edge and a fin element trailing edge; said fin root section being forwardly displaced from a remainder of said fin element, and having a fin root section leading edge projecting beyond said fin element leading edge and a fin root section trailing edge exhibiting a cutaway from said fin element trailing edge; said fin element having an aspect ratio of 2:1 or greater and a quarter-chord sweepback in a range between 0 and 25 degrees; said fin element having a fin element cross-section from said fin element leading edge to said fin element trailing edge that is perpendicular to said dimension, said fin element cross-section having a symmetrical foil shape; and said fin tip having a fin tip cross-section from said fin element leading edge to said fin element trailing edge that is perpendicular to said fin element cross-section, said fin tip cross-section having a shape identical to said symmetrical foil shape divided along a line between said fin element leading edge and said fin element trailing edge.