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| Number | Title | Issue Date |
| 7481687 | Jet propulsion outboard and inboard motor The present invention relates to a novel and non-obvious propulsion system for watercraft, especially, but not limited to, watercraft less than about 50 feet in length. Propulsion system of the present invention provides a system that is less prone to being impeded ... | 01/27/2009 |
| 7371139 | Nozzle drive propulsion for a marine craft A nozzle drive propulsion assembly for use with a marine craft and incorporating an annularly configured nozzle disposed in surrounding relation to a propeller collectively mounted exteriorly of the marine craft and preferably, at least partially, within an elongate... | 05/13/2008 |
| 7096810 | Bow mounted vessel propulsion system A bow mounted vessel propulsion system is designed to exploit the characteristics of a self-producing vessel lubricating boundary layer of air or air bubbles formed during water surface interaction by the vessel's hull during vessel movement. This boundary layer of ... | 08/29/2006 |
| 7070468 | Multi-hull watercraft with amidships-mounted propellers An efficient double-ended watercraft is disclosed that comprises four low-Froude number hulls: two forward, two aft, two on the port side, and two on the starboard. Each hull comprises an independent engine that drives a propeller shaft and propeller that is located... | 07/04/2006 |
| 7001229 | Water vehicle propeller In this specification regarding water vehicle propellers, the gist of the technical disclosure resides in the construction of a propeller having elongated blades which extend in a helical path and longitudinally of the hull of a water vehicle in an unbroken length, ... | 02/21/2006 |
| 6562206 | Anode assembly A propeller attachment is disclosed including a body, the body including an anodic material, at least one projection projecting from the body, and a fastener coupled to the body. An anode is also disclosed including an annular body constructed from an ano... | 05/13/2003 |
| 6431926 | Ribbon drive propulsion system and method A ribbon drive propulsion apparatus and method for water-borne vessels such as surface craft and submersibles is disclosed. The vessel is equipped with an extended tube having an intake at a first end and an outlet at a second end. A ribbon formed of heli... | 08/13/2002 |
| 6213042 | Small waterplane area multihull (SWAMH) vessel with submerged turbine drive A small waterplane area multihull (SWAMH) vessel having an upper hull platform located above the design water line of the vessel which is maintained above the surface of a body of water by at least two cylindrical submerged hulls joined thereto by support... | 04/10/2001 |
| 5411422 | Spiral propeller having axial void A propeller is presented which comprises a one piece blade that spirals out from an angular solid hub portion in smooth transition as a continuous screw spiral (or helix). Throughout its length, the spiral screw portion has an open center, (i.e., axial vo... | 05/02/1995 |
| 5392871 | Amphibious vehicle and control An amphibious vehicle having a hull and pair of multiple-flighted outriggers which coact to stabilize and propel the vehicle over land and water. The speed and direction of the vehicle is controlled by a joystick allowing an operator to move the craft ove... | 02/28/1995 |
| 5269714 | Auger boat A boat with a pair of air hose augers with a rubber ridge type surface and two wheels of a ridge surface or sled runners for holding a boat on the rails of a railroad track, the boat has a double snow plow blade for cleaning away the snow from streets, ra... | 12/14/1993 |
| 5203729 | Auger-driven amphibious toy An auger-driven remotely controllable amphibious vehicle is disclosed. The vehicle includes a buoyant hull in the general configuration of a speedboat. An auger is mounted for rotation along each side of the vehicle. The generally cylindrical augers with ... | 04/20/1993 |
| 5203274 | Amphibious vehicle A buoyant boat hull of an amphibious vehicle has concave, quarter cylinder recesses along the sides down from the waterline, such recesses receiving the upper inboard quadrants of helical augers. The recesses confine water between the screw threads and pr... | 04/20/1993 |
| 5125677 | Human powered machine and conveyance with reciprocating pedals A machine powered by forces exerted by the machine user on machine driving members, such as pedals, which drive a rotary driven member through a unique variable ratio drive system. The machine may be constructed and arranged for use as either a vehicular ... | 06/30/1992 |
| 4867716 | Boat The present invention includes a boat having a pair of rotatable elongated pontoons on opposite sides thereof. Each of the pontoons has helical flighting for propelling the boat during rotation of the pontoon. The pontoon also is filled with floatation ma... | 09/19/1989 |
| 4857022 | Amphibious vessel An amphibious vessel has at least two substantially parallel, elongate flotation members (2, 3) which operate on water as hulls. Each flotation members (2, 3) is rotatable about a longitudinal axis thereof so as to be rollable over land. The rotation of o... | 08/15/1989 |
| 4838819 | Marine propulsion unit This marine propulsion unit has a main shaft for connection to a drive shaft, and a helical screw along the main shaft. A duct surrounds the main shaft and screw thereby creating a ducted area. The ducted area has a water inlet near its proximal end and a... | 06/13/1989 |
| 4734067 | Hydro-rotor A hydro-rotor for providing propulsion or generating electricity in a device positioned in water. A hollow tank having a forward and aft tapered end in the preferred embodiment is mounted about a longitudinal axis to a pair of stabilizer plates. A helical... | 03/29/1988 |
| 4459117 | Liquid jet propulsion The liquid jet propulsion unit is driven by the conventional outboard motor. The drive of the motor directly rotates an impeller which draws up the water into an impeller chamber where it is moved by isentropic radially extending impeller blades. These bl... | 07/10/1984 |
| 4198917 | Ice-breaking means for ships Disclosed are ice-breaking units for ships adapted to be installed at the bow and/or bottom portion of the ship's hull, consisting of two ice-breaking units each of which can be reversibly driven independently of each other, for performing ice-breaking an... | 04/22/1980 |
| 3977353 | Jet powered marine propulsion unit A jet powered marine propulsion unit includes a pair of spaced parallel conduits extending longitudinally through a ship with intakes adjacent the bow of the ship. A tubular propeller is mounted in the conduits with blades extending inwardly toward the ax... | 08/31/1976 |
| 3953024 | Water tumbler and roller float A hollow semi-rigid cigar-shaped float formed with helical external projections in the form of two corkscrew threads for use in water sport. Each corkscrew thread projection is formed from the middle of the float to an end, with one end of the float shape... | 04/27/1976 |
