Patent ID: 8763551

Claim:
A human powered watercraft, comprising: a buoyant board body defined as comprising a top rider surface, a bottom submerged surface, a front section half, a rear section half, a board centerline and a board plane, wherein the board centerline extends from the front section half to the rear section half and extends in-between and generally parallel to the top rider surface and the bottom submerged surface, and wherein the board plane is generally parallel to and in-between the top rider surface and the bottom submerged surface; a leg engagement mechanism pivotally connected to the board body positioned generally along the top rider surface and the rear section half, wherein the leg engagement mechanism engages a human rider's legs while laying in a prone position on the top rider surface; and a fin propulsion mechanism pivotally connected to the board body positioned generally along the bottom submerged surface and the rear section half, wherein the fin propulsion mechanism is mechanically coupled to the leg engagement mechanism, wherein pivoting the leg engagement mechanism pivots the fin propulsion mechanism; wherein the leg engagement mechanism comprises a leg shaft, a rear ankle support and a front ankle support, wherein the leg shaft comprises a proximal leg shaft end and a distal leg shaft end, wherein the leg shaft is pivotally connected to the board body at the proximal leg shaft end and wherein the rear ankle support and front ankle support are connected to the leg shaft at the distal leg shaft end, and wherein the leg shaft pivots about a leg shaft axis generally perpendicular to the board centerline and generally parallel to the board plane, such that engagement of a human rider's front ankle is against the front ankle support and engagement of a human rider's rear ankle is against the rear ankle support.