Abstract: An improved human powered watercraft propulsion device and mounting frame for attachment to existing pontoon watercraft. The propulsion device is light weight, self-contained, portable, has few moving parts made from corrosive resistant materials, and is propeller driven for quiet, efficient, and environmentally friendly underwater propulsion. Having a simple twisted belt configuration with an open structural design, all of the components are easily viewed and maintained by the user, as well as continuously cleaned, cooled, and lubricated by the water during operation, without the need for a sealed waterproof housing and internal oil bath. Hand knobs provide belt tensioning during operation and the device is adapted for operation by pedal, friction wheel, or direct chain drive. The device is adjustable on the attachment frame to fit the operator, pivots when beaching or striking an underwater object, and components such as pulleys and the propeller are changeable to achieve different power ratios.

Abstract: A portable, human-powered, catamaran styled water cycle that can be used by users of all ages. The water cycle contains a left pontoon, a right pontoon, a steering mechanism, a propelling mechanism, a seat, a left wheel, and a right wheel. The steering mechanism has a rudder which is controlled with the use of a steering handle. The propelling mechanism has a propeller which is powered by pedaling. The left pontoon and the right pontoon are both foldable such that the water cycle can be extended or collapsed conveniently. The seat is cushioned and also includes a back rest which can be used as a second seat when required. The left wheel is mounted onto the left pontoon and the right wheel is mounted onto the right pontoon. Therefore, the water cycle can be dragged with the use of the wheels for storing purposes.

Abstract: A portable pedal driven propulsion device for a small watercraft (1) in which power from crank operated pedals (5) is transmitted to a pivotally mounted gearbox (32) or pulley system (81,82,83) adjacent the operator. A longitudinal drive shaft (2) is connected, at one end, to the gearbox (32) or pulley system (81,82,83) and, at the other end, to a propeller (40) such that the drive shaft (2) and propeller (40) can be moved selectively between a raised inoperative position and a lowered operative position.

Abstract: A human-powered land vehicle, such as a bicycle, is mountable to a collapsible water craft having a compact drive unit which can be pivoted about two orthogonal axes, one for directing the thrust for steering the craft, the other for raising or lowering the thrust assembly. The drive unit is releasably mountable to the frame of the vehicle and is connected in use to receive torque from the crank, for instance by an endless chain, and by a remote linkage to the handlebars, or like steering device of the vehicle.

Abstract: A water craft includes a first portion having a front end, a rear end, and at least two sides; a second portion connected to the rear end of the first portion, wherein the second portion includes a walking-exercise treadmill portion having an exercise platform and at least two propelling portions on either side of the exercise platform; third and fourth portions that include at least two laterally spaced, parallel air tanks or pontoons; and a handle connected to a front end of the first portion and used as a controller for the walking exercise treadmill portion and a steering unit of the water craft.

Abstract: A pedal powered drive mechanism and an aquatic vehicle having such a mechanism are constructed primarily of lightweight inexpensive moulded plastic. The vehicle has a buoyant hull with a central longitudinal axis and saddle seat. Handle bar steering is mounted to the hull and a pedal powered drive mechanism drives a stem mounted propeller. The mechanism is constructed of moulded plastic components for simple assembly and results in an inexpensive lightweight drive compared to conventional metal components. The drive has a housing with two axially spaced apart shaft bearing cradles. The crank shaft is disposed in the cradles, with opposing crank arms and pedal mounts extending perpendicular to the crank shaft axis and outward of the cradles. A drive pulley is mounted on the shaft between the cradles by sliding a pulley central opening along the shaft over at least one pedal mount. Collars disposed on the shaft between the pulley and each cradle retain the assembly in a simple manner.

Abstract: A pedal-powered watercraft comprises a unitary hull having an upper wall extending from a bow portion to a stern portion of the watercraft and a pair of spaced hollow sponsons located on either side of the upper wall. The upper wall together with inner walls of the sponsons form a tunnel that opens generally downwardly and extends from the bow portion to the stern portion of the watercraft. A deck is connected to the hull and includes an elongate opening that defines a cockpit area for receiving an occupant. A seat is located in the cockpit area and a pedal assembly is connected to the hull forwardly of the seat. The pedal assembly includes a pivotal pedal tower and a pair of pedals rotatably mounted on the pedal tower. The pair of pedals are operably connected to drive the propeller during pedal rotation.

Abstract: A water workout apparatus comprising a paddleboat is propelled by various means such as oscillating pedals, rotating pedals, and push-pull levers or handle bars. The paddleboat can be propelled in reverse by rotating the handle and utilizing separate reversing oscillating pedals to motivate the belt driven gear system. The paddleboat can be utilized out of the water by being supported on a pair of stands to provide physical exercise of arms and legs.

Abstract: This device is a raft which when attached to a standard bicycle may be steered and propelled through water by riding the bicycle in the usual fashion. The raft consists of two sections that can be folded for easy storage and transportability. These two sections unfold and are plugged together to form the raft. The bicycle is attached to the raft by adjustable tie-down straps. The drive mechanism incorporates both forward and reverse drive operated by a remote hand lever. Propulsion is accomplished by a friction wheel engaging the rear wheel of the bicycle with power transmission and translation through a gear assembly to the drive shaft and propeller. The front steering unit and rear drive unit are designed to swivel up out of the way if hit by an underwater obstacle.

Abstract: A watercraft comprising a body, two inflatable floatation members, a drive assembly, a steering assembly and a seat wherein the body portion of the watercraft is foldably collapsible from an operative configuration to a transportable configuration. When in its transportable configuration, the watercraft body forms a compact storage case adapted to accommodate all of the elements of the watercraft for easy and convenient transportation. The storage case generally includes a first compartment wherein the drive assembly and seat are stored and a second compartment accommodating the floatation members and other miscellaneous components of the watercraft.

Abstract: A pedal drive apparatus for mounting in a boat such as on the rear gunwale of a typical rowboat featuring a drive wheel coupled to a crankshaft and also coupled to a propeller shaft through a bi-directional pulley system. Coupling between pedal crankshaft and flywheel and between the flywheel and propeller pedal is achieved with belts. A bicycle style seat with handle bars for steering is featured and a handgrip lever on the handlebar enables the user to lock the steering wheel in a temporary orientation.

Abstract: A floatation device with propeller drive assembly and steerable rudder for use with any standard bicycle frame allowing an individual the ability to have a self propelled water craft. The device utilizes a standard bicycle, having only the wheels removed, to provide power and steering. The bicycle is mounted to the floatation device with the chain wrapped around the chain drive sprocket of the propeller drive assembly. Because the chain drive sprocket is a standard shimano sprocket, the bicycle's rear derailer may be used to shift gears. The operator may pedal the device across a body of water, then remove the bicycle frame and remount the tires to continue travel over land.

Abstract: An amphibian bicycle wherein the central screw portion for the rear wheel hub part coupled with the large circular disc plate, and that for the inner body end coupled with the small circular disc plate have screw portions in a direction contrary to that for the gears, whereby loosening of the gears is prevented in the case of fastening the large circular disc plate integral with the multi-stage gears with the bolts during its forward and backward motions on the water. In the case of operations on land, all the related bolts are separated for the driving operation.In case of operation on water, the air tubes having a plurality of air chambers, semi-circle frames and fixing pipes uniformly distribute and support the weight of the bicycle and the human body.

Abstract: Land vehicle floatable and steerable in water, having inflatable sectors applied to the front and back frame with articulated tie-rods and supports. The rear wheel of the vehicle is adapted to strike a roller or an equivalent gear connected to a transmission gear provided with at least a shaft equipped with a propeller. The transmission gear is connected to the inflatable sectors by interposition of extension tubes, tie-rods or rigid supports.

Abstract: The floatation apparatus for use with any standard bicycle (either single or tandem unit) a catamaran or pontoon hull with a tubular structure to support a standard bicycle. The front wheel of the bicycle will be removed and the front fork will be attached to a support that is connected to the directional control system in order to provide a steering mechanism. The novel steering mechanism has the fork connected to a steering control pulley. An adjustable line is connected to the steering control pulley on one end and wraps around a steering pulley that is attached to the rudder at the rear of the apparatus. By reversing the direction of the steering control lines and passing them around a number of idler pulleys, the operator will turn the apparatus in the direction he or she turns the bicycle's handle bars. The rear wheel of the bicycle will rest on a rotating drum that will provide power to a drive propeller.

Abstract: A recreational paddle board is provided having a floating board, a substantially flat board portion and two paddle drives affixed thereto. A drive shaft has pedals rotatably mounted thereto so that the user may rotate the paddle drives. Each paddle drive includes first and second cranks and an endless flexible member, having a plurality of paddles hingedly affixed thereto, is entrained around the cranks. The paddles are engaged by fixed paddle guide element along the lower run of the flexible member so that, when the drive shaft is pedalled, the paddles generate a reactive thrust only in the desired linear direction. Each paddle drive also includes speed conversion device which changes the rotational speed of the flexible member relative to the drive shaft. In a first preferred embodiment, the substantially flat portion comprises a buoyant foam or plastic panel. In second and third preferred embodiments, the substantially flat portion comprises a net and air mattress respectively.

Abstract: A water bicycle comprises a flotation board, a propulsion and seat unit including a mounting flange, a seat, foot pedals mounted for rotation driven by a person sitting on the seat, a propeller and a coupling connecting the pedals to the propeller, an opening in the board through which the propeller may pass and a surrounding edge surface able to receive the flange. A connector is provided for releasably connecting the flange to the edge surface. The bicycle includes a bore in the board with a bushing seat surrounding an upper end of the bore, a handlebar unit including a shaft and a bushing provided on the shaft above a lower end of the shaft, the bushing engaging the bushing seat and the shaft being supported and rotatable in the bore, and a rudder unit connected to the handlebar shaft.

Abstract: A propeller driven surfboard is provided which consists of a hull having a nose at the bow and a tail at the stern. A skeg is mounted to the underside of the hull, while a seat having a support structure is mounted onto the hull between the nose and tail thereof for a person to sit on. A mechanism is mounted in the hull in front of the seat, for propelling the hull along a body of water. Another mechanism is mounted in the hull in back of the seat, for steering the hull along the body of water.

Abstract: A pedal boat for recreational use includes an inflatable ring on top of which is mounted a platform structure carrying a seat, pedals and a steering mechanism. The pedals drive a shaft mounted diametrically of the ring and carrying paddles. The steering action is effected by clutching the left or right paddles on the drive shaft.

Abstract: A water craft includes two parallel, spaced-apart pontoon hulls, and a superstructure bridging between the pontoon hulls. A propeller is operatively connected to foot pedals so that the propeller can be rotated to drive the craft. The propeller is supported between the two pontoon hulls, in such a way as to allow the propeller to shift laterally across the spacing between the pontoon hulls. Two rudders are provided aft of the propeller, and a steering arrangement simultaneously controls the angulation of the rudders and shifts the lateral position of the propeller toward the pontoon hull which would describe the outside arc for the turning maneuver in the desired direction.

Abstract: A water bicycle and a detachable device for converting a sail board into a water bicycle. The water bicycle has a flotation member and a frame removably mounted to the flotation member. Pedals are rotatably mounted to the frame. Paddle wheels are provided on either side of the frame and are interconnected with the pedals so as to be rotatably driven by the pedals. A steering handle is rotatably mounted to the frame and is interconnected with the paddle wheels to selectively steer the water bicycle by raising and lowering the paddle wheels.

Abstract: Water sporting boat of the pedal type comprising a surfboard having a hollow keel at the stern into which is provided a mechanical transmission connected to one end of a rotary shaft, a propeller being mounted at the other end of the shaft, outside the hollow keel. Pedal power is transferred to the mechanical transmission by a chain drive also connected to a pedalling rack fixed on the surface of the surfboard. A steering rack, provided forwardly of the pedalling rack, is connected to a rudder, at the stern of the surfboard, by a cable transmission. The steering rack includes a handle bar and the cable transmission is connected to the rudder so that the latter responds to the same steering direction as that applied by the handle bar.

Abstract: A watercraft, which is propelled by a swivellable propulsion fin, which extends from its swivel axle parallel to the longitudinal direction of the watercraft and which is swivellable laterally by a drive device. The swivellable propulsion fin is arranged on the stern of the watercraft in the prolongation thereof.