Buoys – rafts – and aquatic devices – Swimming aid to increase stroke efficiency – Foot attached
Patent
1985-11-12
1988-10-04
Peters, Jr., Joseph F.
Buoys, rafts, and aquatic devices
Swimming aid to increase stroke efficiency
Foot attached
A63B 3110
Patent
active
047753439
ABSTRACT:
A hydrodynamic swim fin utilizes a wing and a tail that are overlapped normally to provide a two stage propulsion system. Ribs support the wing and tail and define flow channels. These ribs are parallel to each other and to the longitudinal axis of the fin whereby the effective area through which flow proceeds is uniform throughout the length of the fin. No parts of the ribs form barriers to the leading edges of the side wing segments whereby laminar flow is achieved. The fin part is maintained essentially rigid; however, the fin part is allowed limited angular movement about a defined transverse axis to achieve proper attack angle. Since the fin part is rigid, it maintains that attack angle throughout the length of the fin part. Trailing ends of the wing are individually flexible to produce greater opening for two stage propulsion during the power downstroke, and to produce substantial closure for one stage propulsion during the upstroke.
REFERENCES:
patent: Re23006 (1948-06-01), Churchill
patent: 2737668 (1956-03-01), Cressi et al.
patent: 3082442 (1963-03-01), Cousteau et al.
patent: 3183529 (1965-05-01), Beuchat
patent: 3810269 (1974-05-01), Tabata et al.
Skin Diver, Aug. 1983, p. 51, Tabata Fin Ad.
Chopelas Peter A.
Lamont Mark D.
Avila Stephen P.
Flam Fred
Peters Jr. Joseph F.
Tachner Leonard
Undersea Industries, Inc.
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