High-lift, low drag fin for surfboard and other watercraft

Details High-lift, low drag fin for surfboard and other watercraft High-lift, low drag fin for surfboard and other watercraft

2007-07-17

2007-07-17

Basinger, Sherman (Department: 3617)

Buoys, rafts, and aquatic devices

Water skimming or walking device

Having stabilizing surface

C114S127000, C114S140000

Reexamination Certificate

active

11163626

ABSTRACT:
This invention discloses a fin, for use on a surfboard and other watercraft, of a low-drag, high-lift, high-aspect-ratio, low-sweepback-angle planform of symmetrical foil section, with a fit root section that has a forwardly projecting leading edge and cutaway at the trailing edge, alone or in combination with winglets placed on the vertical fin element so as to minimize tip-vortex drag, so as to make the surfboard or watercraft more maneuverable, easier to propel through the water, and to stabilize the surfboard or watercraft.

REFERENCES:
patent: 2081868 (1937-05-01), Hampden
patent: 3747138 (1973-07-01), Morgan
patent: 3845918 (1974-11-01), White
patent: 4050397 (1977-09-01), Vanderleest
patent: 4320546 (1982-03-01), Knox
patent: 4561371 (1985-12-01), Kelley et al.
patent: 5809926 (1998-09-01), Kelsey
patent: 6101963 (2000-08-01), Shen
patent: 6234856 (2001-05-01), Woolley
patent: 2002/0094733 (2002-07-01), Kershaw
patent: 0 092 785 (1983-11-01), None
Translation for EPA 0092785.

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