Swim fin with flexible fin member having movable tips

Details Swim fin with flexible fin member having movable tips Swim fin with flexible fin member having movable tips

1984-11-16

1990-05-29

Basinger, Sherman D.

Buoys, rafts, and aquatic devices

Swimming aid to increase stroke efficiency

Foot attached

A63B 3108

Patent

active

049292064

ABSTRACT:
A swim fin adapted to be mounted on a foot of a swimmer including a foot receiving portion having a substantially planar base section terminating at one end thereof in a heel section which extends downwardly therefrom and which terminates at the other end thereof in an open toe section and an elongated flexible fin member formed of a resilient material and which extends from the open toe section and which is integral with the substantially planar base section of the foot receiving portion wherein the elongated flexible fin member is generally trapezoidal in shape with the smaller end thereof contiguous the open toe section of the foot receiving portion and with the longest end of the elongated flexible fin member forming a deflecting end which terminates in a pair of movable tips wherein the cross-sectional shape of the elongated flexible fin member in a direction which is normal to the center line extending substantially perpendicular from the smaller end to the deflectable end which is thicker at the center thereof and which tapers in thickness therefrom to each side of the elongated flexible fin member to define a relatively thin edge wherein the flexible fin member is capable of being deflected toward the open toe section and then to be abruptly reversed in a direction to deflect the flexible fin member towards the heel section of the foot receiving portion which reverses the direction of the deflectable end of the flexible fin member and moves the movable tips along an arcuate shaped path causing a snapping action thereof and the combination of movements thereof is adapted to produce a propelling force is shown.

REFERENCES:
patent: 2423571 (1947-07-01), Wilen
patent: 3055025 (1962-09-01), Ferraro et al.
"Force Fin", Skindiver, Jan. 1982, pp. 38-39.

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