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An armor with rollers is provided that enables a user to move in all positions by rolling on a hard and smooth surface while constantly varying his bearing points on the ground.
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| Number | Title | Issue Date |
| 7201621 | Portable bow thruster for small boats A portable bow thruster for use on the bow of a boat in a body of water having a water line. The bow thruster includes a blower assembly for producing an air flow to provide thrust, an exhaust air duct for expelling the air flow from the blower assembly, pivoting me... | 04/10/2007 |
| 6942531 | Joy stick control system for a modified steering system for small boat outboard motors A joystick controller for modified steering system for boats with outboard motors. The system uses a directional nozzle for the jet output that is attached to a control cable system. This cable turns the directional nozzle, which causes the trust of the jet output t... | 09/13/2005 |
| 6932661 | Steering and directional reversing control for waterjet propulsion Waterjet flow emerging from a jet propulsor body through a cross-sectionally circular duct is conducted through a cross-sectionally rectangular duct passage extending through transition and exhaust aft sections attached to and angularly adjusted relative thereto. Un... | 08/23/2005 |
| 6352455 | Marine propulsion device The propulsion device (10) includes a housing (12) having an incoming end cap (14) and an outflowing end cap (16). A tubular bladder (20) within the housing is interconnected to each end cap, thereby varying the volume of both a chamber (22) within the bl... | 03/05/2002 |
| 6171159 | Steering and backing systems for waterjet craft with underwater discharge The inventive apparatus exercises control of the water flow which is discharged from a marine waterjet propulsor. Typical inventive embodiments comprise plural horizontal and plural vertical blade-like structures which together describe an open-ended, box... | 01/09/2001 |
| 5875627 | Fluid propulsion system for accelerating and directionally controlling a fluid A propulsion system for accelerating and directionally controlling a fluid having a continuous dynamic surface for circulating through a fluid from an entrainment region where fluid is introduced to the dynamic surface to a thrust region where fluid is di... | 03/02/1999 |
| 5501072 | Combined centrifugal and paddle-wheel side thruster for boats A thrust propulsion mechanism (10) for a boat (12) includes an outlet conduit (22) extending athwartships from a first outlet port (16) to a second outlet port (16') in the hull (18). A paddle-wheel impeller (24) is mounted within the hull for rotation ab... | 03/26/1996 |
| 5289793 | Heliconic thruster system for a marine vessel An improved thruster system is provided for maneuvering and/or propulsion of a marine vessel, through the use of directionally oriented water jets discharged tangentially from a helical-conical flow chamber. The thruster system includes a high capacity pu... | 03/01/1994 |
| 5233755 | Method of manufacturing the wall of a combustion chamber, in particular for a rocket engine, and a combustion chamber obtained by the method The method of manufacturing a combustion chamber wall, in particular for a rocket engine, includes the following steps: [a] making a corrugated metal inner shell by deforming a first plane or tubular sheet; [b] making a metal outer shell from a second plane or... | 08/10/1993 |
| 5193475 | Thrust expansion engine Break-up activity of water by injection of hot propellant gas into channels f a thrust expansion engine is suppressed to prevent rapid cooling of the gas, utilizing one or more methods including injection of a secondary inflow of the propellant gas and/or ... | 03/16/1993 |
| 4832632 | Method and apparatus for generating a high plume of water behind a marine craft A method and apparatus for generating a high plume or "rooster tail" of water behind a water jet propelled marine craft, such as a jet ski, is characterized by the insertion of a water diverting member into the upper regions of the jet of water dischargin... | 05/23/1989 |
| 4708671 | Watercraft with thrust-reversing device This disclosure relates to a small craft equipped with a water jet propulsion system and a thrust-reversing device. The thrust-reversing device is supported for movement up and down between an operating position located directly to the rear of the exhaust... | 11/24/1987 |
| 4699596 | Modified jet ski nozzle This invention is a nozzle system for use on a water craft and in particular a water craft such as a jet ski. A jet ski is a small engine powered surface water craft, usually designed for one person usage, and generally having a small aft deck suitable fo... | 10/13/1987 |
| 4672807 | Wall thruster and method of operation A wall thruster for surface or submarine vessels that is cavitation resistant and does not require a hull duct. The invention comprises an impeller mounted in a swirl chamber such that seawater is rotated under pressure. The water is then discharged throu... | 06/16/1987 |
| 4605376 | Marine jet propulsion unit 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 bl... | 08/12/1986 |
| 4276035 | Duct systems for water jet propulsion boats A water jet propelled boat hull having an axis of forward motion, a bottom and a centerline. A first and a second water duct are provided, each of which has an exit port discharging rearwardly, the exit ports being laterally spaced from the centerline and... | 06/30/1981 |
| 4252075 | Water jet propulsion system with laterally disposed reverse ports A water jet propulsion system for use with boats having an impeller duct which discharges a stream of liquid through a nozzle to propel the vessel in a forward direction. A reversal plate is provided which occludes the rearward jet opening and causes the ... | 02/24/1981 |
| 4240370 | Propulsion system for hydrofoil, planing and semi-planing sea-going vessels A propulsion system for a hydrofoil, planing or semi-planing sea-going vessel having a hull having a port pump water inlet formed therethrough on its port side, a starboard pump water inlet formed therethrough on its starboard side and first, second and t... | 12/23/1980 |
| 4223630 | Jet boat reversing unit The invention pertains to reversing apparatus for hydraulic jet marine drives utilizing a pivoted steering nozzle and a reversing gate adapted to divert a jet of water into a reversing nozzle. The reversing nozzle is rotatably mounted upon the steering no... | 09/23/1980 |
| 4138963 | Boat steering mechanism A boat includes a longitudinal water channel along the bottom thereof. A motor driven propeller in the channel circulates water from a forward inlet end thereof to a rear outlet end thereof to advance the boat through the water. Passages are provided whic... | 02/13/1979 |
| 4086867 | Boundary layer inlets and transverse mounted pumps for water jet propulsion systems A water jet propulsion system of improved efficiency with a novel boundary ayer water inlet, and having multiple water jet pumps and motors. The inlet has a large width to height ratio. The pumps may be connected to one drive shaft which can be connected t... | 05/02/1978 |
| 4074652 | Steering and propulsion device for watercraft A two-stage axial flow steering and propulsion device has impellers operable by a right-angle reversible drive mounted on a watercraft, and a housing surrounds the blades of the impellers. The housing is mounted for rotation in opposite directions about a... | 02/21/1978 |
| 4031844 | Dual jet boat pump A double suction, double volute pump for propelling a boat having each volute exhaust through a separate jet nozzle. The pump housing defines two intake passageways leading upward to either side of a double suction impeller. The housing further provides d... | 06/28/1977 |
| 3985094 | Series waterjet propulsion pumps for marine vehicles A waterjet propulsion system having at least two pumps in series so that low from a hull or other intake is directed through a first waterjet propulsion pump; and then via a two-position diverter valve, either out to a thrust nozzle, or to and through a ... | 10/12/1976 |
| 3945201 | Marine jet drive shift control apparatus A marine jet drive unit includes a continuously running pump. A reversing gate is positioned partially or wholly within the forward jet to establish a corresponding reverse jet. For neutral drive, the gate is positioned such that the reverse jet just bala... | 03/23/1976 |
