Class 440/15 - Flexible

Subclass of Class 440 - Marine propulsion
Definition: Device wherein the reacting surface which comes in contact
No. of patents: 31
Last issue date: 07/08/2008

Number	Title	Issue Date
7396267	Watercraft rowing fin system A rowboat roving fin system that includes two rotating fin assemblies mounted on the watercraft's opposite sidewalls. Each fin assembly includes a rotating vertical post held on the outside surface of the sidewall by a mounting bracket. When held by the mounting bra...	07/08/2008
7300323	Linear actuator for flapping hydrofoil A linear actuator is provided that converts linear motion to oscillatory motion. The linear actuator includes flats, a hinge, and linear actuators. A hydrofoil is mountable on a spindle attached to the hinge. In operation, a linear push direction by the linear actua...	11/27/2007
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
7198529	Recreational watercraft with hydrofoil A recreational watercraft device consisting of a light hull in the shape of a sail board hull and on the bottom a strut hydrofoil assembly. The hydrofoil has a bilateral symmetric plan-form with a pivot connection at the center of the hydrofoil span. The pivot conne...	04/03/2007
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
6923693	System for utilization of sinus-shaped motion pattern The invention relates to a system for utilization of a sinusoidal pattern of movement for propulsion or energy recovery. The system comprises a plurality of rigid hull elements, completely or partly submerged, arranged in a row, rotatably attached to one another for...	08/02/2005
6843691	Sculling apparatus for small boats The present invention provides an apparatus for propelling a small boat through a body of water by use of a sculling action. The apparatus may be comprised of a vertical stock attached to a vertical surface of the boat, normally the transom. A wide, flexible fin may...	01/18/2005
6746287	Underwater propelling apparatus which stably carries out a propelling operation and a steering operation An underwater propelling apparatus includes a body and a plurality of vibrating units. The plurality of vibrating units are placed in parallel to each other on a rear side of the body. Each of the plurality of vibrating units vibrates repeatedly and reciprocally to ...	06/08/2004
6692317	Water craft propelled by a double-flipper device actuated by a pedal mechanism A rigid or inflatable water craft propelled by a double-flipper device for safe displacement both for the user and nearby swimmer.consists of a floater specifically linked to a propelling system comprising a pedal mechanism with discoid branches with prot...	02/17/2004
6524145	Swimmer propulsion device A swimmer propulsion device includes a harness with attached frame and resilient tail assembly. A foot-operated driver on the frame rotates and forces an apex member against the fluked tail assembly, while tensioning propulsion bands. As the apex member r...	02/25/2003
6179683	Swimming aquatic creature simulator A swimming aquatic creature simulator having a body which propagates waves of undulation of and along that body to thereby propel the simulator through a fluid in a lifelike manner. The body is formed of an elastomeric material and may be shaped like a fi...	01/30/2001
6138604	Pelagic free swinging aquatic vehicle A pelagic free swimming aquatic vehicle includes a rigid forebody having a predetermined volume; a watertight chamber in the forebody; and a flexible afterbody having a lesser volume than the forebody and including a maneuvering and propulsion propulsion ...	10/31/2000
6079348	Diving apparatus and method for its production A diving apparatus includes an elongated hollow body which can completely accommodate a human body extending in the longitudinal direction of the hollow body but which differs from the external shape of the human body. In this case, the hollow body is des...	06/27/2000
5934952	Marine propulsion unit A marine propulsion unit including a conduit having opposed, inlet and outlet ends. A first pivot pin is pivotally secured within the conduit adjacent its inlet end. A second pivot pin is pivotally secured within the conduit adjacent its outlet end. The f...	08/10/1999
5549491	Fin drive for a watercraft A fin drive for a watercraft (1) has a lever arm (7, 7') operable with muscle force, which lever arm is connected to an up and down movable carrier (2) through a joint, on which the fin (25) is fastened. The fin (25) is fastened on the carrier (2) on a sw...	08/27/1996
5441454	Water totter A water teeter-totter is provided having a seating member for two or more persons. The seating member is pivotally mounted to a floating, buoyant support member, such as one defined by a pair of pontoons. The seating member is rockable relative to the flo...	08/15/1995
5409408	Sailboard with reciprocating fins and umbrella type rotary parafoil sail The windsurf board comprise a revolving sail, reciprocating fins and single sided pedal. The revolving sail rotates a drum to drive the reciprocating fin. On the drum, there are multiple cycles of slot knotched on the drum. One revolution of revolving sai...	04/25/1995
5373800	Sea vessel A water vessel comprising a hull, at least one retractable hydrofoil apparatus configured for disposition in an extended orientation for vessel operation in a hydrofoil mode and for disposition in a retracted orientation for vessel operation in an underse...	12/20/1994
5348503	Underwater paddle and vertical fin for swimmer A swimming aid includes a paddle with two blades for alternating arm strokes and a vertical blade attached to both feet for side to side leg motion in cooperation with the arm strokes. The two paddle blades are at opposite ends of a hand held shaft. Each ...	09/20/1994
4934971	Swim fin A swim fin includes a shoe assembly for attachment to the individual feet of the user, an outwardly projecting rigid support frame, a pivoted web, and a strap or band for yieldably limiting the extent of pivotal movement of the web relative to the support...	06/19/1990
4894032	Floatation apparatus A floatation apparatus including a buoyant body for supporting a passenger, which is preferably lens-shaped and made of transparent plastic material, and controls for the direction and propulsion of the floatation apparatus when in water including a rotat...	01/16/1990
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
4464126	Finboard exercising apparatus The exercising apparatus described herein is an exercising board having a maneuverable fin which may be used to propel the board by its upward and downward motion. The board is used on water and may be used in surf riding. The rider stands on the board an...	08/07/1984
4389195	Steerable surfboard A steerable, self-propellable surfboard has a steering arrangement attached to a weight-bearing buoyant member such as normally forms a surfboard and arranged for being actuatable by a surfer lying prone on the buoyant member and permitting the surfboard ...	06/21/1983
4389196	Watercraft with swivel fin drive 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 ...	06/21/1983
4304555	Watercraft with swivel fin drive 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 ...	12/08/1981
4193371	Double-acting single-web swimming apparatus A swimmer's propulsion apparatus of the type comprising an anti-drift member and a propelling fish-tail member connected to the anti-drift member so as to perform a swinging motion with respect to said anti-drift member, wherein the improvement consists i...	03/18/1980
4172427	Water propulsion unit including fin having foil and flexible ends A propulsion unit for driving water craft, particularly those of the floating lounge type, is disclosed as including a fin made from a flexible material with a first end formed to define a foil into which the lower end of an oscillatory drive member proje...	10/30/1979

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Class 440/15 - Flexible