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| Number | Title | Issue Date |
| 5520558 | Jet propulsion unit for a watercraft A number of compact jet pump and prime mover propulsion units for watercraft. In each embodiment the jet propulsion unit impeller shaft is driven by a prime mover that is disposed at least in part below the jet propulsion unit and which has its output sha... | 05/28/1996 |
| 5520557 | Hydrojet A hydrojet for ships, intended for use in shallow waters, has a semiaxially bladed impeller with a vertical axis of rotation rotatably arranged in a well-shaped housing. The drive for the impeller is introduced into the housing from the top through a cove... | 05/28/1996 |
| 5516313 | Fire fighting accessory for jet propulsion system A fire fighting accessory for diverting the water flow generated by a jet propulsion system from the drive unit to a fire fighting implement, the accessory specifically designed to be attached to an existing drive system in a noninterfering relationship w... | 05/14/1996 |
| 5509832 | Marine jet drive A jet drive for propelling a vessel has a rotatable impeller coupled to an engine. An impeller housing surrounds the impeller. A diffuser housing and a nozzle housing are attached to the impeller housing, which is supported by a transom. An intake duct is... | 04/23/1996 |
| 5490804 | Marine propulsion unit having exteriorly accessible clean-out capability and flushing device for same A marine propulsion unit is disclosed which has an exteriorly accessible clean-out capability. The unit has an impeller housing located outside of the transom of a marine craft in which the unit is installed, which impeller housing has a separable portion... | 02/13/1996 |
| 5490768 | Water jet propulsor powered by an integral canned electric motor A water jet propulsor powered by an integral canned electric motor includes a hollow housing having a hermetically sealed stator mounted therein. The stator is electrically connected to a source of electrical energy in the vessel. An impeller assembly tha... | 02/13/1996 |
| 5490474 | Watercraft A small personal watercraft having a number of features, such as a pair of rear-view mirrors which form a ventilating function for ventilating the engine compartment. The watercraft has a straddle-type motorcycle-like seat on which passengers may sit in s... | 02/13/1996 |
| 5480330 | Marine propulsion pump with two counter rotating impellers Disclosed herein is a marine propulsion water pump including a casing defining a water passage including an inlet, an outlet, and an intermediate portion between the inlet and the outlet, a first impeller located in the intermediate portion of the casing,... | 01/02/1996 |
| 5472359 | Enclosed shaft system for marine jet propulsion drives An enclosed shaft system for tunnel jet drive marine propulsion systems for providing an improved lubrication and coolant system over current designs. The preferred embodiment of the present invention contemplates the utilization of an enclosed shaft syst... | 12/05/1995 |
| 5469803 | Individual underwater propulsion device An underwater device using a reaction propulsion system. The initial flow entering by a front end turbine (1) is divided into two laminar, partially divergent flows (2) enabling the diver to place himself in the wake of the device. The power supply (3) is... | 11/28/1995 |
| 5468165 | Grass and debris exclusion plate for marine jet pumps A passive anti-clogging device for feeding water into marine jet pumps, which displaces the laminar flow around the trailing surfaces of the intake port, such that foreign debris and grass are precluded from clogging the intake to the jet pump. The primar... | 11/21/1995 |
| 5462460 | Jet propulsion unit and prime mover therefore A pair of small watercraft powered by a combined jet propulsion and prime mover unit so as to eliminate the use of separate impeller drive shafts passing through the water inlet duct. The prime mover may comprise either an electric motor or an internal co... | 10/31/1995 |
| 5462461 | Water jet propulsive device A water jet propelling device has a rotor adapted to be located below a waterline and having a front water impermeable wall, a peripheral wall formed by a plurality of blades arranged with gaps therebetween to form a water inlet and extending tangentially... | 10/31/1995 |
| 5460553 | Jet pump mounting system A system for mounting a jet propulsion unit to a watercraft having a hull with a mounting opening, the jet propulsion unit including a power head and a jet pump housing secured to the power head, the mounting system including a power transmission portion ... | 10/24/1995 |
| 5460552 | Adaptor plate mounting system for marine jet propulsion unit A mounting system for connecting a marine power head having a vertically disposed crankshaft to a jet propulsion unit for isolating operational vibrations includes an adaptor plate, a power head mounting apparatus on the adaptor plate for securing the pow... | 10/24/1995 |
| 5449305 | Watercraft A small watercraft powered by twin jet propulsion units, each driven by a respective engine. The engine is concealed within a hatch cover that has a larger portion which is removable for removal of the engine and a smaller portion which is pivotal for ser... | 09/12/1995 |
| 5437568 | Water jet propulsion unit A number of embodiments of watercraft having jet propulsion units contained within a tunnel in the hull and wherein the jet propulsion unit is pivotal about a first transversely extending horizontal pivot axis for bringing the jet propulsion unit through ... | 08/01/1995 |
| 5433635 | Jet plate sensor for watercraft A number of embodiments of jet and speed sensor mounting plates that are adapted to be positioned on the hull of a watercraft in underlying relationship to a jet propulsion unit. In each embodiment, a speed sensing device is affixed to the plate and const... | 07/18/1995 |
| 5429064 | Boat A water borne boat is propelled by manually energized water pumps that propel the boat by induction and reaction forces, the water pumps being manually energized by a person standing on drive members of the pumps, which are operated in the manner of a tre... | 07/04/1995 |
| 5423279 | Protective mat for a personal watercraft A mat for replacing the neoprene strips inside of a JetSki.RTM. hull is described. The mat has risers which function to lift the fuel tank above the surface of the inner hull, thereby protecting the fuel tank from possible rupture during use.... | 06/13/1995 |
| 5405276 | Water injection propulsion device Several embodiments of jet propulsion drive units for watercraft wherein the engine outer housing is provided with an integral step down transmission so that the engine can be a high speed, low displacement engine and still drive the jet propulsion unit w... | 04/11/1995 |
| 5403220 | Jet-propelled chair float A floating chair moves forward, turn or drifts under control of a pair of on/off switches connecting a rechargable battery to power a pair of sump pumps which jet water from the rear of a pair of elongated floats supporting the chair. The battery is in a ... | 04/04/1995 |
| 5401195 | Trolling system for water crafts A water craft having a hull with trolling motors contained within the hull and either an inboard or outboard motor as the primary motor for moving the water craft is described. The trolling motors are contained either in angled recesses or angled passagew... | 03/28/1995 |
| 5401197 | Hull A number of embodiments of hull arrangements for watercraft that permit forward positioning of the propulsion device but also permit the hull to be constructed as a planing hull. In some embodiments, jet propulsion devices are disclosed and in another emb... | 03/28/1995 |
| 5401198 | Jet pump system for a water jet propelled boat A jet pump system for a water jet propelled boat is disclosed that provides for the adjustment of the area of the water intake opening or the water entry angle as a function of the speed of the boat. During low speed operation, the water inlet opening is ... | 03/28/1995 |
| 5385111 | Arrangement for the drive of a watercraft, in particular for an inflatable boat A drive unit for a watercraft, in particular for an inflatable boat, with a motor unit and with a pump unit for the intake, acceleration and expulsion of water, which pump unit is in a driving connection with the motor unit via a power train, and with fas... | 01/31/1995 |
| 5383801 | Hollow jet thruster device A device for producing thrust from a flow of accelerated fluid, including: a fluid accelerator (1) fitted with drive vanes (5) and rotated inside a stator (10) about an axis of revolution; a circularly symmetrical stationary web portion (7) centered on th... | 01/24/1995 |
| 5383802 | Propulsion system The present invention relates to a fluid propulsion system having an outer shell which provides bearing support, ducting and streamlining for a hollow inner propulsion rotor. The rotor includes vanes having a plurality of blade sections which are supporte... | 01/24/1995 |
| 5376028 | Jet propelled watercraft A number of embodiments of jet propelled watercraft having one or more jet propulsion units positioned within a tunnel formed on the under side of the hull. The jet propulsion units are pivotal about a transverse horizontally extending axis between a lowe... | 12/27/1994 |
| 5376027 | Marine propulsion mechanism for water craft A marine propulsion mechanism submersible in water for driving a water craft is disclosed. The propulsion mechanism includes a streamlined housing having a fluid inlet opening positioned between the forward and rearward ends of the housing in addition to ... | 12/27/1994 |
| 5375551 | Water jet saucer A water jet propelled saucer shaped water craft having a smoothly curved, convex shaped outer surface comprised of a hull section being slightly radiused from a curved bottom surface up to a circular top, a water jet propulsion system for altering the ver... | 12/27/1994 |
| 5372526 | Drive bearing lubricating device for water injection propulsion vessel Two embodiments of water jet propulsion units having an improved bearing arrangement for supporting the impeller shaft where it passes through the hull for connection to the engine. In each embodiment, a gravity feed oil system supplies lubricant to the b... | 12/13/1994 |
| 5366396 | Water-jet drive A water-jet drive with a stator and a rotor enclosed by a housing having an inlet and an outlet nozzle, the rotor shaft which supports the rotor at one end and has torque-transmitting means at the other end being rotatably supported in the housing by shaf... | 11/22/1994 |
| 5356319 | Boat with removable inboard jet propulsion unit A boat is provided with an integral jet power unit encased in a waterproof housing. The hull has a well or compartment open at top and bottom which removably receives the power unit. Retaining elements hold the power unit in place in the compartment. Resi... | 10/18/1994 |
| 5342227 | Water jet propulsion unit A water jet propulsion unit for a watercraft including a separator for extracting a portion of the water pumped by the jet propulsion unit for another purpose while removing foreign particles from the separated water and returning them to the jet propulsi... | 08/30/1994 |
| 5338234 | Water injection propulsion device Several embodiments of water jet propulsion units having variable thrust devices by controlling the effective cross sectional area of the discharge nozzle. The rate of acceleration is sensed and the nozzle opening is changed in response to the sensed rate... | 08/16/1994 |
| 5330374 | Jet propulsion system A jet propulsion system for a small watercraft including an arrangement for isolating the sound of water flowing through the water inlet portion of the jet propulsion unit from the occupants of the watercraft. This silencing is provided by providing a dou... | 07/19/1994 |
| 5310369 | Water jet propulsion unit A number of embodiments of watercraft having jet propulsion units contained within a tunnel in the hull and wherein the jet propulsion unit is pivotal about a first transversely extending horizontal pivot axis for bringing the jet propulsion unit through ... | 05/10/1994 |
| 5310368 | Seal construction for a pump of a small watercraft A seal construction for a pump of a small watercraft of the water jet propulsion type, the watercraft including a hull and a pump casing. A pumping passage for water jet propulsion is formed by the pump casing and a portion of the hull. The seal construct... | 05/10/1994 |
| 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 |
