Derek Robert Leek

US Patent:

20090258553, Oct 15, 2009

Filed:

Apr 15, 2009

Appl. No.:

12/385654

Inventors:

Derek Robert Leek - Honolulu HI, US

International Classification:

B63B 35/79

US Classification:

441 79

Abstract:

A thick, elliptical-planform fin for use on a water sport board such as a surfboard. One set of attributes of the fins according to the present invention is the use of a substantially thick cross-section which, at its maximum thickness, overhangs the receiver slot, typically a 12 to 15 percent thickness ratio, with a maximum thickness at 30 percent of chord length, a blunter leading edge, and a short elliptical planform of constant relative dimension cross-section along its length.