A watercraft and associated pedal drive system are provided. Method of operating the pedal drive are also provided. The pedal drive system allows for unassisted manual pedaling to provide thrust to the watercraft. The pedal drive system also provides on demand pedal assistance of varying levels via an assist drive train having an electric motor to supplement the manual pedal force input provided by a user at the pedals of pedal drive system.

A quarter-twist pedal propeller includes a propeller blade and a support frame. A large synchronous wheel is mounted on an upper part of the support frame through a main shaft, a pedal assembly is mounted on each end of the main shaft. A small synchronous wheel is mounted on a lower part of the support frame through a secondary shaft. A waterproof plate is mounted outside the support frame. The waterproof plate is disposed above the propeller blade. A portable cover that covers the large synchronous wheel is provided on top of the support frame. A grabbing part is provided on the portable cover. A balancing pole is transversely connected to the portable cover. The present invention is practical and cost-effective, has novel and simplified structure, and can reduce power loss due to multiple transmissions. It is convenient during pedaling.

Method and apparatus for an improved recreational canopy which may be used with watercraft wherein the canopy is constructed by using a pair of flexible, resilient rod-like members wherein one end of each of the flexible rods is inserted through mating apertures in an upright support member mounted onto the watercraft, or other structure, so that the rods are bowed outwardly and frictionally held in the stanchion. A canopy, which may incorporate solar cell fabric, is attached between the rods so that the canopy generally appears to be in an elongated V-shaped structure which stretches across a portion of the supporting structure, such as a watercraft, between the flexible rods. The upper end of the upright support member may be pivotable and the rod-like members may be disposed in a cap removably disposed on the upper end of the upright support member. A lighting system including an alternative power source being provided on the canopy. Also, a user driven pedal system for providing propulsion to a kayak watercraft is shown which includes a generator driven by the pedal system for providing additional electrical energy for use on the watercraft and for propelling a kayak by either a propeller or flappers.

Disclosed are systems, devices, and methods for swimming using a swimming apparatus that includes an exterior shell, optionally including a top half and bottom half and an opening to accommodate a propulsion system.

A centerless wheel assembly may include a centerless rim configured to rotate about a point. The centerless wheel assembly may also include a centerless flywheel that may be configured to indirectly couple with the centerless rim and to rotate about a point. The centerless wheel assembly may additionally include a device for rotating the centerless rim in a first direction and in a second direction. The centerless wheel assembly may also include a one-way bearing that may be disposed between the centerless rim and the centerless flywheel. The one-way bearing may be positioned such that as the centerless rim may rotate in the first direction, the centerless flywheel may be caused to rotate in the first direction and as the centerless rim may rotate in the second direction, the centerless flywheel may not be caused to rotate.

The invention discloses a lifeboat which can be used in a typhoon day. The boat includes a hull. The hull is provided with a helical gear space symmetrically on the lower side of the transmission space. On the left side of the energized magnet, when the hull is stabilized, the motor needs to be automatically loosened and taken up to stabilize the hull. At the same time, the fan blades can be rotated to drive the ship forward or backward by the rotation of the helical gear, which can fully convert the excess electrical energy into The mechanical energy can also slide the rotation axis of the fan blade down to the fixed connection with the first rotating rod. When a person steps on the pedal, the mechanical energy generated can drive the fan blade to rotate to make the boat move forward or backward, and a life buoy is also designed. Insufflation function and push-out lever, which can automatically throw out the inflated life buoy for rescue when rescue is needed.

The invention comprises a paddle board apparatus and method of use thereof, comprising: a manual crank connected to a drive shaft, a rotatable housing, and a set of paddle wheels connected to an outer surface of the rotatable housing, where a child manually turning the crank simultaneously propels the paddle board forward in water through use of the paddle wheels and drives an air pump in the rotatable housing to blow bubbles about the paddle board for enjoyment of the child riding the paddle board.

In an oscillating fin propulsion apparatus adapted for use by a disabled diver, a propulsion force may be produced by a fin adapted to sweep back and forth in a generally transverse direction relative to the traveling direction of the diver. The fin may be mounted on a scuba tank operatively connected to drive members that may be reciprocated by the diver. The oscillating fin may provide a propulsive force propelling the diver forward during both oscillating directions of the fin.

A watercraft includes left and right hull members that are held in spaced apart, parallel relation by a supporting frame structure. A pendulum propulsion assembly mounts to the frame structure, between the hull members, and includes left and right pendulum assemblies that are each movable in a forward and rear direction by the operator's arms and legs. Each pendulum assembly includes at least a forward pendulum member extending through an upper pivotal connection to a lower pivot element coupled to a horizontal pendulum plane. A paddle holder mounted below the pendulum plane supports an arrangement of spaced paddles. Operation of the left and right pendulum assemblies in the forward and reverse alternating action through a normal stride causes the paddles to propel the watercraft in a forward direction. Forward flexing of the paddles in the power stroke is limited by tethers connecting between the paddles and the paddle support.

A dual drive system for providing motive power to a watercraft has a frame configured for connecting to the watercraft and a drive assembly connected to the frame. The drive assembly has a manual drive mechanism configured for receiving mechanical input from a user, a motor drive mechanism configured for receiving mechanical input from a motor, a driveshaft having a first end in selective engagement with one of the manual drive mechanism and the motor drive mechanism and a second end in engagement with a propeller, and a drive selector for selectively engaging the manual drive mechanism or the motor drive mechanism with the driveshaft based on a position of the drive selector between first and second positions. In the first position, the drive selector engages the manual drive mechanism with a driveshaft. In the second position, the drive selector engages the motor drive mechanism with the driveshaft.