Swim fin

Details Swim fin Swim fin

1975-12-18

1977-02-15

Blix, Trygve M.

A63B 3110

Patent

active

040075060

ABSTRACT:
A swim fin having a foot portion and a blade portion. The blade portion includes a plurality of transversely spaced longitudinally extending ribs that are connected to each other by a web member. The ribs are comprised of a plurality of elongated flexible members juxtaposed upon each other with the elongated members being inherently biased to a relatively straight condition interlocking tangs and grooves on the juxtaposed elongated members prevent lateral separation of the members. A pin passing transversely through the elongated members acts to limit the longitudinal displacement of one elongated member with respect to another. The mating surfaces of the juxtaposed elongated members have a relatively low coefficient of friction that allows the elongated members to slide relatively effortlessly with respect to each other in the longitudinal direction when the blade portion of the swim fin is subjected to forces during the swimming kick stroke that causes the elongated flexible members to undergo a reverse curvature.

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