Abstract: A watercraft propulsion device having a plurality of cooperating paddles driven by levers in a sweeping motion while cooperating with a peddle gear and electric motor in order to produce a reciprocating back and forth paddle motion capable of driving the watercraft through water densely populated with obstructive matter such as grass, Lilly pads, logs and other debris with ease. Additionally the pedal gear of the present invention allows for the paddles to be lifted while being brought towards the watercraft and then the paddle is brought downward and away from the vessel to push the device forward. Finally a speed throttle arm is mounted to the device to control the speed at which the paddles reciprocate and to control the direction that force is applied at the stern of the watercraft.

Abstract: The present invention discloses a method and system for a nautical propulsion device comprising a plurality of cooperating paddles driven by levers in a sweeping motion while cooperating with a peddle gear and electric motor in order to produce a reciprocating back and forth paddle motion capable of driving a vessel through water densely populated with obstructive matter such as grass, Lilly pads, logs and other debris with ease. Additionally the pedal gear of the present invention allows for the paddles to be lifted while being brought towards the vessel wherethen said paddle is brought downward and away from the vessel to push the device forward. Finally a speed throttle is mounted to the device to control the speed at which the paddles reciprocate and control the directions that force is applied in to the back of a vessel.

Abstract: A boat propulsion apparatus having a thrust blade mounted for swinging movement about a generally horizontal swing axis lengthwise of the boat and for turning movement about an upright blade axis, and a swash plate drive for simultaneously swinging the blade about the swing axis in a direction crosswise of the boat and for angularly oscillating the blade about the blade axis to sinusoidally vary the pitch of the blade as the blade is swung crosswise of the boat. A planetary gear type mechanism is provided for adjusting the angle of the swash plate while the boat propulsion apparatus is in operation or when it is stopped. The thrust blade is connected to the blade shaft through an overload release coupling to prevent damage to the thrust blade and propulsion apparatus in the event the thrust blade strikes an obstruction. An improved arrangement for mounting the thrust blade on the swing shaft and for sealing the thrust blade to an enclosure for the boat propulsion apparatus, is also disclosed.

Abstract: A paddle boat comprising a plurality of floats, collapsible driving and propelling apparatus, folding steering apparatus, the driving and propelling apparatus and steering apparatus adapted for mounting onto the floats during use of the paddle boat, particularly wherein the driving and propelling apparatus includes a paddle adapted to remain in a substantially vertical orientation during movement of the boat.

Abstract: A pedal-operated nautical propulsion device for small craft, such as a pneumatic raft. The device comprises a pedal crank system producing circular motion which is transmitted by a frame-supported mechanism to a holder carrying a paddle to cause the paddle to undergo translation in a vertical plane, whereby the paddle is plunged in the water to propel the craft and then raised thereabove. The mechanism which makes it possible for the paddle to extend well forward of the pedal crank system includes a bar coupled to the system to transmit the motion thereof, the end of the bar being hingedly connected to the end of the paddle holder. Further included are first and second interhinged connecting rods, the end of the first rod being hinged to the bar and the end of the second rod being hinged to the paddle holder to define a deformable quadrilateral structure.