Linear propulsion system for small watercraft

摘要

A foot-operated propulsion system for small watercraft, such as kayaks. The propulsion system includes a pedal assembly that controls motion of a fluke fin that is submerged beneath the waters surface. The pedal assembly is located in the bow of the watercraft and the paddler works the pedals with his feet. Operating the pedal assembly causes a force to be transmitted to a drive unit located in the stern of the craft, which then controls movement of linkages in the fluke assembly, to force the submerged fluke fin to swing upward and downward, emulating the motion of flukes on a whale, and thereby propelling the watercraft along the surface of the water.

主权项

1. A small watercraft propulsion system comprising:
a pedal assembly that is operatable by a user; a drive unit that is powered by the pedal assembly; a fluke activation mechanism that is actuated by the drive unit; a fluke that is pivotably attached to the fluke activation mechanism; wherein operating the pedal assembly transmits a force through the drive unit to the fluke activation mechanism that causes the fluke to move in an up and down manner; and wherein the fluke moves vertically a certain distance at a defined and constant angle relative to a horizontal plane and then flips when reversing direction to move in a defined and constant angle on the opposite side of the horizontal plane, thereby propelling the watercraft along the surface of the water.