Abstract: A watercraft propulsion system configured to be coupled to the transom of a boat. A continuous track is supported by a suspension frame and operably coupled to an outboard motor.

Abstract: The present patent consists of a vehicle equipped with a series of floating caterpillars that circulate on an ovoid rail, forming a continuous track; the male-female couplings between the traction caterpillars, their hydrodynamic locks and their direction system operate with the braking of one of the sides of the track and the slipping of the opposite track, being able to rotate through 360°. Said vehicle has the purpose of towing load barges on rivers or lakes. Due the absence of displacement, since the vehicle moves on the water, the performance is distinctly improved and the fuel consumption is considerably reduced in comparison with watercraft having an equivalent load-carrying capacity.

Abstract: The present patent consists of a vehicle equipped with a series of floating caterpillars that circulate on an ovoid rail, forming a continuous track; the male-female couplings between the traction caterpillars, their hydrodynamic locks and their direction system operate with the braking of one of the sides of the track and the slipping of the opposite track, being able to rotate through 360°. Said vehicle has the purpose of towing load barges on rivers or lakes. Due the absence of displacement, since the vehicle moves on the water, the performance is distinctly improved and the fuel consumption is considerably reduced in comparison with watercraft having an equivalent load-carrying capacity.

Abstract: An acceleration system for a link belt-mounted ship includes; water wheels, rotating shafts mounted through the water wheels, link belts surrounding the water wheels and formed at an outer peripheral surface thereof with hook-shaped blades, ball bearing units mounted external to the water wheels so that the rotating shafts are inserted therethrough, square pipes onto which the ball bearing units are bolted, hinges bolted onto the square pipes and each hinge having a hinge rod bolted to the hull, and hydraulic cylinders fastened on the square pipes so that they are fixed to the bottom surface of the hull by way of upper brackets and associated pins, and fixed to the square pipes by way of lower brackets and associated pins.

Abstract: An acceleration system for a link belt-mounted ship includes; water wheels, rotating shafts mounted through the water wheels, link belts surrounding the water wheels and formed at an outer peripheral surface thereof with hook-shaped blades, ball bearing units mounted external to the water wheels so that the rotating shafts are inserted therethrough, square pipes onto which the ball bearing units are bolted, hinges bolted onto the square pipes and each hinge having a hinge rod bolted to the hull, and hydraulic cylinders fastened on the square pipes so that they are fixed to the bottom surface of the hull by way of upper brackets and associated pins, and fixed to the square pipes by way of lower brackets and associated pins.

Abstract: A paddle construction for watercraft applications, engineered to efficiently provide thrust and reduce form drag with other advantages inherent to the structure. The paddle has a means of actuation and a body. The body has at least one leading edge, at least one trailing edge, and at least one chord extending between the leading and trailing edges. The body has at least one thickness that varies along the length of the chord(s) from the leading edge(s) to the trailing edge(s), and therefore has at least one maximum thickness. The maximum thickness is located closer to the leading edge(s) than the trailing edge(s). This construction provides for at least one body portion tapered from the area(s) of maximum thickness to the trailing edge(s) to reduce form drag during use.

Abstract: The present invention provides a paddle boat having a hull and a closed loop flexible member which is rotatably mounted to the hull while a pedal assembly longitudinally drives the flexible member around its loop. A plurality of substantially planar paddles are pivotally mounted to the flexible member at spaced positions therealong. The paddles are pivotal between a first and a second position. In the first position, the paddles extend outwardly from the flexible member and propel the hull forwardly as the flexible member is driven by the pedal assembly. Conversely, in its second position, the paddles lie in planes substantially parallel to the direction of travel of the flexible member to permit free gliding of the boat. However, a locking assembly is associated with at least one paddle to lock the paddle in its first position when the flexible member is driven in the reverse direction.

Abstract: The marine jet propulsion unit of this invention, in preferred form, has a pair of laterally adjacent blade carriers, each having a vertical outer surface movable in a horizontal orbit and to which blades are fixed that project edgewise outwardly. Each blade has a surface facing in the direction of its orbital movement that is concavely curved along its height. The two blade carriers, at opposite sides of a fore-and-aft extending vertical plane of symmetry, are driven in opposite orbital directions such that each has a driving portion remote from the plane of symmetry that moves rearward in an acceleration channel and has an opposite forwardly moving portion adjacent to the plane wherein its blades are interleaved with those of the other. Water entering a forward intake is guided in two streams, one to the front end of each acceleration channel, and the rear end of each acceleration channel is communicated with a discharging outlet nozzle.