Patent ID: 7510453

Claim:
A swimming aid device, comprising: a first fin; a second fin; a locking means; wherein each of said fins has an internal space capable of enclosing a portion of a wearer's foot; wherein each of said fins has an opening leading to said internal space capable of allowing a wearer to insert a foot through said opening; coupling means for detachably coupling said first fin to said second fin, said coupling means includes a track and a rail, wherein said track is disposed on a lateral side of said first fin and has a groove running in a longitudinal direction substantially parallel to a longitudinal axis of said track, said groove slidably receives said rail, and said rail is disposed on a lateral side of said second fin; wherein said track has at least one longitudinal lip that sufficiently prevents detachment of said rail from said groove in a direction perpendicular to said longitudinal direction; wherein said locking means prevents further relative sliding movement between said rail and said groove, and said locking means includes a slot and an indentation, said slot is disposed on one of the two fins, and said indentation is disposed on one of the two fins complementally to the slot, wherein when said rail is fully received within said groove, said indentation aligns with said slot, and is caught by said slot; wherein said slot and said indentation are each complementally located at one of two terminal ends of said track or said rail; and wherein said fins are made of resilient material.