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US 4,025,977 AGranted
Angular foot fin
AssigneeU. S. Divers Co.
InventorJohn J. Cronin
Life of this patent
Estimating the term…
Abstract
The following specification discloses a foot fin for propelling one through the water, having a blade surface that can be oriented within the same axis as the leg of a user. The foot fin enables one to propel oneself through the water and maintain a similar axial orientation of the driving portion of the fin, to the user's leg. In order to provide for walking while the fin is not being used in the water, a hinge point is inserted within the fin to allow it to be placed within the same general plane as the sole of a user's foot.
Claims3
A swimming fin comprising:
- a foot receiving portion having a blade extending therefrom in a manner whereby the blade can be oriented into a semi-rigid extended position at an attitude of being substantially in the same axis as the general axial direction of a user's leg during swimming movements to the extent of the inherent resiliency of the material forming the fin and wherein said blade extends laterally outwardly in a direction away from the foot receiving portion;
- and,
- means for orienting said blade from an axis substantially in parallel relationship to a user's leg into an axis substantially parallel to a user's sole of the foot to enable a user to walk with the fin when the user is not using the fin in a swimming mode.
Dependencies are inferred from the claim text.