| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 440013000 | OSCILLATING PROPELLING MEANS | 18 |
| 20110281479 | FLEXIBLE IMPACT BLADE WITH DRIVE DEVICE FOR A FLEXIBLE IMPACT BLADE - A watercraft having a plurality of flexible section secured to a mount, having a drive assembly, wherein the water craft can move the flexible section upwardly and downwardly to propel the watercraft through the water. | 11-17-2011 |
| 20090311926 | Fin for oscillating foil propulsion system - A watercraft having propulsion means extending below the water line comprising a pair of flexible fins each adapted to oscillate through an arcuate path in a generally transverse direction with respect to the central longitudinal dimension of said watercraft, and means operatively associated with said propulsion means for applying input force to said propulsion means whereby as input force is applied said flexible fins can twist to form an angle of attack for providing forward thrust with respect to the longitudinal dimension of the watercraft while moving in both directions along said arcuate path; | 12-17-2009 |
| 20090311925 | Wave Power - A wave-powered water vehicle includes a surface float, a submerged swimmer, and a tether which connects the float and the swimmer, so that the swimmer moves up and down as a result of wave motion. The swimmer includes one or more fins which interact with the water as the swimmer moves up and down, and generate forces which propel the vehicle forward. The vehicle, which need not be manned, can carry communication and control equipment so that it can follow a course directed by signals sent to it, and so that it can record or transmit data from sensors on the vehicle. | 12-17-2009 |
| 20090186536 | LEVER POWERED WATERCRAFT - Embodiments of the disclosure include a flotation device or watercraft propelled through the water using a lever powered propulsion system. The lever powered propulsion system includes human powered actuating levers operably connected to a reciprocating propulsion device. As a rider powers the levers up and down, that motion translates to the propulsion device, which cycles through a high drag propulsion phase and low drag recovery phase. | 07-23-2009 |
| 20110039460 | INTERNALLY MOUNTED WATERCRAFT ROWING FIN SYSTEM - An internally mounted rowboat rowing fin system that includes two rotating fin assemblies mounted on the inside surface of the watercraft's opposite sidewalls. Each fin assembly includes a rotating vertical post held on the inside surface of the sidewall by a mounting tube selectively mounted or integrally formed on the sidewall. Longitudinally aligned and disposed inside each mounting tube is a hollow, elongated sleeve. Disposed inside each elongated sleeve is a rotating post that extends upward above the gunwale and into the water below the elongated sleeve. A pivoting fin arm with a flexible fin attached thereto is pivotally attached to the lower end of each rotating post. Attached to the upper end of each rotating post is a perpendicularly aligned handle bracket. A rowing handle is pivotally attached at one end to the handle hinge. During use, the two handles extend inward from the sidewall and are grasped by the rower. Both handles are able to swing in a vertical 180 arc over their respective handle hinges thereby allowing the fins to rotate 180 and sweep in opposite directions. | 02-17-2011 |
| 20100291814 | FIN PROPULSION APPARATUS - A propulsion apparatus is provided for propulsion in a fluid, comprising at least one propulsion fin being fixed to a fin axle, and means for driving the propulsion fin comprising a crankshaft, a pitching mechanism for rotating the propulsion fin around the axis of the fin axle, and a heave mechanism for translating the propulsion fin in a substantially transverse direction with respect to the axis of the fin axle, and where the crankshaft is driving the pitching mechanism and the heave mechanism. A simple, reliable and efficient construction is obtained by having both the heave and the pitch mechanism mounted on a single crank on the crankshaft, or to separate cranks having substantially the same radius and angular position with respect to the axis of rotation of the crankshaft. | 11-18-2010 |
| 20120264341 | Vibration-Powered Floating Object - A vibration-powered device adapted for flotation and propulsion on an upper surface in a liquid. The device having a body with a top side adapted to be at least partially disposed above the surface of the liquid, and a bottom side adapted to be at least partially submerged below the surface of the liquid. A vibration mechanism is disposed in the body. A propulsion fin is connected to the body. The fin includes a top side adapted to be disposed at least partially above the liquid surface, a bottom side adapted to be disposed at least partially below the surface. The vibration mechanism is adapted to oscillate the free distal end of the propulsion fin upward and downward. | 10-18-2012 |
| 20120276792 | HUMAN POWERED WATERCRAFT - A human powered watercraft is disclosed. An exemplary embodiment includes a board body having a top rider surface, a bottom submerged surface, a front section half, a rear section half, a board centerline and a board plane. A leg engagement mechanism is pivotally connected to the board body positioned generally along the rear section half. The leg engagement mechanism engages a rider's legs while laying in a prone position on the top rider surface. A fin propulsion mechanism is pivotally connected to the board body positioned generally below a water line and mechanically coupled to the leg engagement mechanism. Rotating the leg engagement mechanism rotates the fin propulsion mechanism, thus creating a forward thrust. | 11-01-2012 |
| 440014000 | Fishtail motion propelling means | 10 |
| 20090191772 | Oscillating-foil type underwater propulsor with a joint - An oscillating-foil type underwater propulsor with a joint provided in the invention, the propulsor including a streamline foil having a foil surface being parallel to a water surface and a span length of at least twice as long as an average chord length of the streamline foil, and a heaving mechanism undergoing heaving motion perpendicular to a propulsion direction of the propulsor and having a transmission section, wherein the transmission section is pivotally connected to the streamline foil to form a joint, the joint being provided at the middle of the span length and having a rotation center located within a circular area, which has a radius of one third of the average chord length and is centered at the point one third of the average chord length ahead of the lifting center of the streamline foil. | 07-30-2009 |
| 20120190254 | Watercraft for Transportation and Exercise - A watercraft for transportation and exercise including a boat having an opening therein for permitting a person to be partially below the waterline and partially above the waterline. A sub-frame is operatively attached to the boat, the sub-frame having a lower position and an upper position. A propulsion device is operatively attached to the sub-frame for propelling the watercraft forwardly in response to movement of the person's feet, the propulsion device having a foot contact portion. The foot contact portion of the propulsion device being disposed a predetermined distance from the waterline when using the propulsion device in the transportation mode, said foot contact portion of the propulsion device being disposed in the water and a substantial distance below said predetermined distance when the propulsion device is being used in an exercise mode. | 07-26-2012 |
| 20110028056 | APPARATUS FOR OSCILLATING AND ORIENTING A VANE AND A VESSEL INCLUDING SUCH AN APPARATUS - An apparatus for oscillating and orienting a vane comprising a main lever ( | 02-03-2011 |
| 20100285703 | TRANSLATING CHARIOT FOR FIN PROPULSION - Maritime propulsive mechanism employing oscillating fins ( | 11-11-2010 |
| 20120045950 | MULTIDIRECTIONAL PROPULSION SYSTEM FOR SHIPS, INCLUDING A MECHANICAL HYPOCYCLOID TRANSFORMER - The invention relates to a multidirectional propulsion system for ships, including a mechanical hypocycloid transformer, which comprises a drive system ( | 02-23-2012 |
| 20080242162 | Scuba tank air powered, steady pulling, diver propulsion device uses dual compound pistons attached to dual water thrusters at efficiency where breathing air is supplied to diver without curtailing normal dive time - Scuba tank compressed air can now power a dual piston compound motor driving dual water thrusters of a steady pulling underwater propulsion vehicle. Motor exhaust provides diver breathing air through a demand regulator. Motor efficiency allows continual, powerful diver thrust without curtailing normal tank dive time. Lightweight vehicle can be strapped to the scuba tank for “hands free” operation or “diver held” for driving through the water. Diver controls off/on/variable speed with a simple throttle control. Propeller or battery is not required. | 10-02-2008 |
| 20100151751 | Propulsion Device For Propelling A Floating Watercraft, A Conversion Kit For Replacing A Propeller Where The Kit Comprises Such A Propulsion Device, A Watercraft Comprising Such A Propulsion Device And A Method For Increasing The Efficiency By Using Such A Conversion Kit - This invention relates to a propulsion device ( | 06-17-2010 |
| 440015000 | Flexible | 3 |
| 20110287674 | Watercraft propulsion device - A propulsion device is disclosed for propelling a floating watercraft. In at least one embodiment, the propulsion device includes a flexible fluke that is pivotal about a substantially horizontal fluke pivot axis, and at least one device for transmitting an oscillatory motion about the fluke pivot axis to the fluke. The propulsion device may be reconfigured between two or more modes or combinations of modes, for example: a manual power mode, in which a hand-lever is mechanically engaged with the fluke for transmitting an oscillatory, propulsive motion to the fluke by way of a reciprocating movement of the hand-lever; a motor-powered mode, in which a motor is mechanically engaged with the fluke, and the motion of the hand-lever is isolated from any propulsive motion of the fluke about the fluke pivot axis; a forward mode, in which a main portion of the fluke extends astern of the pivot axis; and a reverse mode, in which a main portion of the fluke extends afore of the fluke pivot axis. | 11-24-2011 |
| 20090004933 | Water Craft With a Buoyancy Body - The invention relates to a water craft with a preferably closed buoyancy body ( | 01-01-2009 |
| 20090137164 | MANUALLY OPERATED BOAT - A manually operated boat includes a propelling device including an upright driving rod extending through and rotatable relative to a floating member and having opposite upper and lower end portions that extend outwardly of the floating member, an operating member connected fixedly to the upper end portion of the driving rod, and a paddle member connected fixedly to the lower end portion of the driving rod so as to allow co-rotation of the operating member with the paddle member. The paddle member has a resilient paddle body having first and second paddle surfaces opposite to each other in a direction perpendicular to the driving rod. | 05-28-2009 |
