Forward propelling, retractable float tube fin, with automatic propulsion vanes

摘要

A retractable fin assembly is disclosed for attachment to the boot of a float tube user. The assembly includes a fin member movable between a first position adapted for propelling the float tube user forwardly in the water and a second position adapted for retraction relative to the heel of the boot to permit walking on land by the float tube user. Propulsion vanes are carried by the fin member and have a closed position for providing substantial resistance to the flow of water as the fin member is moved in a rearward direction relative to the user. The vanes also have an open position for providing substantially reduced resistance to the flow of water as the fin member is moved in a forward direction relative to the user. Finally, a mechanism is provided for attaching the fin member to the boot of a user so that the fin member first position provides an acute angle between the fin member and the boot as the fin member projects downwardly and away from the toe of the boot, and the second position aligns the fin member behind the heel above the sole proximate the leg of the user.