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| Number | Title | Issue Date |
| 7874882 | Device for moving an object in relation to a fluid The device comprises at least one flap member (3) having a rear flap portion that runs in a plate plane, and a forward portion, as seen in the direction of motion (F). The forward portion (8) is connected to the object (2) in such manner that th... | 01/25/2011 |
| 7744434 | 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 stre... | 06/29/2010 |
| 7662004 | Human-powered flapping hydrofoil craft A pair of foils are pivotably coupled to a nacelle. The nacelle is pivotably coupled to a mast extending down from to a frame and below a water surface. A push rod oscillates, causing the nacelle to experience a heaving motion, in turn causing the foils to flap up a... | 02/16/2010 |
| 7371136 | 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 a... | 05/13/2008 |
| 7232350 | Human powered watercraft The watercraft described herein is a surfboard, skim board, dive board, or boat having a propelling fin driven by a standing surfer or boater with an upward and downward stroke which may be used to propel the watercraft by an upward and downward fin motion. The surf... | 06/19/2007 |
| 7223140 | Sculling oar An object is to provide a Ro-scull which can suppress a decrease in thrust force by water resistance generated during turn-over operation and can realize high-speed cruise of a boat. The Ro-scull has a Ro-arm 1 and a Ro-blade 2 having a flat part 12... | 05/29/2007 |
| 7204731 | Linear propulsor with radial motion The invention comprises a scalable, configurable “propulsor” system. A propulsor system is an assembly of individual propulsors that act in concert to form a substantially continuous control surface that undulates in a working fluid. Each propulsor is driven and... | 04/17/2007 |
| 6997765 | Vessel propelled by oscillating fin with control mechanisms A marine propulsion system emulates the fishes swimming motion yet is highly maneuverable as it permits changes from forward to reverse motion while underway. In other aspects, the propulsion system may be designed and optimized for efficient human powered propulsio... | 02/14/2006 |
| 6964589 | Sculling boat assembly A sculling boat assembly is provided to control the traveling direction and drive a boat, and the sculling boat assembly installs a transmission mechanism on two hulls, connects an end of each transmission mechanism to a handle extended from the two hulls, connects ... | 11/15/2005 |
| 6925956 | Collapsible watercraft A collapsible watercraft for personal recreation. The collapsible watercraft includes a tubular frame that has a first portion and a second portion. Each of the portions are generally rectangular and are hingably coupled together allowing them to be folded one porti... | 08/09/2005 |
| 6835108 | Oscillating appendage for fin propulsion An oscillating appendage includes a vessel housing a supply of pressurized fluid with reinforced tubes selectively receiving the pressurized fluid from the vessel, an oscillating valve for controlling the supply of pressurized fluid from the vessel to the reinforced... | 12/28/2004 |
| 6755706 | Structure of fin shaped soft paddle The structure of a fin shaped soft paddle comprised mainly of: a loom being a hard stick for exerting force; a fulcrum provided on one end of the loom for pivotally connecting to a fixed oarlock socket of the boat; and a fin shaped soft paddle blade made of elastic ... | 06/29/2004 |
| 6579134 | User-propellable sport board device A sportboard device (10) for movement over a fluid medium, including water, snow, or ice; including a plurality of pivotable fin assemblies (20) for transferring force from the user's feet to the fluid. Fin assembly (20) includes foot platform (30), trans... | 06/17/2003 |
| 6561862 | Swim fin assembly A swim fin assembly of a generally T-shaped configuration including a flexible fin and an elongated foot support bar traversing and being operatively connected to the fin in a rigid securement. The fin is progressively more flexible from its forward end t... | 05/13/2003 |
| 6558210 | Device for propelling a diver through a body of water using pedaling motion A diver lying prone in the water grasps the invention with his hands and pushes on pedals with his feet. The pedal motion is converted into propulsive force that moves the diver through the water. The diver is free to bend at his hip joints and bend and t... | 05/06/2003 |
| 6099369 | Water vehicle A water vehicle includes at least first and second foils which are at least partially submersible in water. These foils are movable, at least to a limited extent relative to each other. Repeated movement of the foils generates a propelling force that will... | 08/08/2000 |
| 6089178 | Submersible vehicle having swinging wings A submersible vehicle is a type having swinging wings. The vehicle is provided with a vehicle main body, a plurality of swinging wings provided for the main body and arranged in series, rotatable shafts located at front edges of the swinging wings, respec... | 07/18/2000 |
| 6079344 | Small watercraft with fin and sail A small watercraft, e.g. a small catamaran, propelled by a vertical fin-like device and/or a sail is invented. A vertical shaft is located in the front portion of the craft. Foot operated multiple arms are secured to the upper portion of the shaft. The fi... | 06/27/2000 |
| 6077134 | Combination bicycle and boat A combination bicycle and boat has a frame; a buoyant rear wheel; and a buoyant front wheel driven by a pair of pedals. The frame is a rigid construction that supports the user on the front and rear wheels for mobility. The frame has a seat and rotatably ... | 06/20/2000 |
| 5816871 | Muscle-powered watercraft A muscle-powered watercraft includes flotation and propulsion structure having at least two blades which remain rigid under the stresses that are subjected to. The front edges of the blades are hinged about respective axes transverse to the watercraft's a... | 10/06/1998 |
| 5401196 | Propulsion mechanism employing flapping foils A propulsion system for use in a fluid, the system utilizing at least one foil which is both oscillated at a frequency f with an amplitude a in a direction substantially transverse to the propulsion direction and flapped or pitched about a pivot point to ... | 03/28/1995 |
| 5370561 | Propulsion device for a watercraft A propulsion device for a floating structure, especially a watercraft, includes an essentially horizontally disposed wing which is rotatably connected to the craft and is arranged to carry out a tilting movement and provide for propulsion of the craft by ... | 12/06/1994 |
| 5360357 | Self-propelled watercraft A small self-propelled watercraft having a main hull and an outrigger hull that is powered by a fin like oar arrangement. The main hull seats the rider and provides the substantial portion of the buoyancy for the watercraft. The fin like oar arrangement i... | 11/01/1994 |
| 5163857 | Self-propelled boat A self-propelled boat (10) to be used by a boater to maneuver himself along the surface of a body of water, especially in shallow water where the use of a motorized boat or a deep bottom boat is impossible or otherwise impractical. The self-propelled boat... | 11/17/1992 |
| 5127855 | Water-borne vehicle A water-borne vehicle with floats, a frame which is mounted on the floats providing a seat and a steering mechanism, and a propulsion means for propelling the vehicle in the water. The propulsion means comprises a plate which is generally parallel to the ... | 07/07/1992 |
| 5000706 | Rocker type propulsion mechanism for a boat A rocker type propulsion mechanism for a boat includes a rocker arm pivotally provided on the boat, a lever arm being laterally connected to the rocker arm for rockably actuating the rocker arm, a paddle being pivoted on an other end of the rocker arm, an... | 03/19/1991 |
| 4969846 | Man-powered boat propulsion device A man-powered boat propulsion device comprising a hand rod reciprocated horizontally by rowers, a vertical support rod moveably suspended from and slidably supporting the hand rod on a sliding support, an operation rod pivoted to the hand rod, a vertical ... | 11/13/1990 |
| 4968273 | Water-borne vessel A propulsion system for a water-borne vessel. There is a generally inflexible fin member. A projection member is connected to the vessel. It has a resilient connecting member attached to the generally inflexible fin member. The projection member is connec... | 11/06/1990 |
| 4913669 | Boat propulsion apparatus 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 bl... | 04/03/1990 |
| 4642056 | Recreational water craft A water craft includes a pair of spaced buoyant panels mounted to a substantially H-shaped frame. A pair of fins mounted along a central longitudinal member of the frame between the panels provides propulsion and steering control. Propulsion is maximized ... | 02/10/1987 |
| 4490119 | Boat propulsion apparatus A boat propulsion apparatus having a thrust blade mounted for swinging movement about a generally horizontal axis lengthwise of the boat and for turning movement about an upright axis, and a swash plate drive for simultaneously swinging the blade in a dir... | 12/25/1984 |
| 4345903 | Fin propulsion boat A boat comprising a tread drive system including pedals which are adjustable to the size of the operator. An axle extends through the bottom of the boat at the center of the tread system and is connected for oscillating movement therewith, the axle carryi... | 08/24/1982 |
| 4332571 | Wave motors There is disclosed an improvement in wave motors for propulsion of boats, of the type comprising a supporting structure connected to the boat and extending downwards into the water, and a tilting element connected to the supporting structure, the tilting ... | 06/01/1982 |
