Fin with a blade having adjustable closed area

Details Fin with a blade having adjustable closed area Fin with a blade having adjustable closed area

2005-08-09

2005-08-09

Basinger, Sherman (Department: 3617)

Buoys, rafts, and aquatic devices

Swimming aid to increase stroke efficiency

Foot attached

Reexamination Certificate

active

06926569

ABSTRACT:
A fin includes a blade, which is lengthwise split into a plurality of sub-blades, so that the sub-blades are separated from one another from an outer end of the blade to a near central point of the blade; and at least one zipper, which is located between two adjacent sub-blades and adapted to zip up for the adjacent sub-blades to provide a closed area. The closed area provided by the adjacent sub-blades is adjustable by zipping up the zipper by different length to thereby regulate a propulsive force that may be produced by the blade of the fin.

REFERENCES:
patent: 2701222 (1955-02-01), Hetzel et al.
patent: 3335441 (1967-08-01), Wolfe
patent: 5586368 (1996-12-01), Nelson

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