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...that the first rickshaw was invented in 1869 by an American Baptist minister, the Rev. E. Jonathan Scobie, to transport his invalid wife around the streets of Yokohama?
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| Number | Title | Issue Date |
| 8070539 | Water intake grill for personal watercraft A water intake grill for attachment to a water intake port associated with a jet watercraft, the water intake grill comprising a plurality of elongate members mounted to and in between fore and aft mounts. The fore mount comprising a base having an angularly orienta... | 12/06/2011 |
| 8007329 | Cutting system for fouling removal from jet drive water intake A cutting system for fouling removal systems used in water-jet drive systems is described. The cutting system includes an actuation system for facilitating movement of a cutting blade that resides outside of the water flow area for the intake of the jet drive system... | 08/30/2011 |
| 7794294 | Water intake grill for personal watercraft A water intake grill for attachment to a water intake port of a jet watercraft. The water intake grill comprising a plurality of elongate members situated in between and mounted to fore and aft mounts. The fore mount comprising a base having an angularly orientated ... | 09/14/2010 |
| 7520789 | Water intake grill for personal watercraft A water intake grill for attachment to a water intake port of a jet watercraft. The water intake grill comprising a plurality of elongate members situated in between and mounted to fore and aft mounts. The fore mount comprising a base having an angularly orientated ... | 04/21/2009 |
| 7377826 | Fouling removal system for jet drive water intake A fouling removal system for use in a water-jet drive system is described. The fouling removal system includes a cutter arm assembly and an optional cutter stud. The cutter arm assembly includes a pivotable cutting blade located adjacent to the intake grate and arra... | 05/27/2008 |
| 7329160 | Motorized watercraft A motorized watercraft with a hull of the craft on which a user lies prone, at least partially, or stands up, with a flow channel extending in the hull of the craft with an electric motor-driven water screw. The electric motor and the batteries, as well as the contr... | 02/12/2008 |
| 7270583 | High efficiency watercraft propulsion system A propulsion system for a watercraft includes a concavity formed in a hull of the watercraft. The concavity has a minimum depth at its leading end and a maximum depth at its trailing end. An impeller is mounted in the trailing end of the concavity and a stator trail... | 09/18/2007 |
| 7217165 | Waterjet steering and reversing apparatus Steering and reversing apparatus for a waterjet-powered marine vessel, the waterjet having an intake duct, a diffuser, and a steering nozzle and producing a rearward water stream flowing from the steering nozzle, the apparatus comprising: a nozzle pivot pivotably at... | 05/15/2007 |
| 7056168 | Outboard waterjet An outboard waterjet propulsion system for a marine vessel having a bottom and a transom with a top edge, the propulsion system comprising: an intake duct with grid bars; a motor; an impeller with an impeller hub and driven by the motor; a steering deflector; and a ... | 06/06/2006 |
| 7018250 | Ride plate positioning mechanism for personal watercraft, and method of using same A ride plate positioning mechanism for a personal watercraft can reduce the burden on an operator during assembly, and can also raise manufacturing productivity. In a ride plate positioning mechanism 30 of a personal watercraft 10, a portion of a botto... | 03/28/2006 |
| 7004802 | Tail cone assembly A tail cone assembly for a watercraft jet pump includes a tail cone body with a shuttle recess, a self-actuated shuttle biased into the shuttle recess, and a pump back pressure inlet orifice through the tail cone body and into the shuttle recess. The shuttle may hav... | 02/28/2006 |
| 6922982 | Marine weedwaker A weed cutting apparatus for use in water is disclosed. The weed cutting apparatus would be designed to cut weeds within a body of water without having the weeds tangle on the present invention. ... | 08/02/2005 |
| 6920782 | Personal-watercraft testing apparatus Personal watercraft to be test is set in a water tank. Water flow guide plate is positioned, rearward of the stern of the watercraft, for guiding a water jet from the watercraft to make a U-turn toward a front portion of the watercraft. Vertical partition plate is p... | 07/26/2005 |
| 6913496 | Personal watercraft A personal watercraft having an engine, a water jet propeller on the rear side of the engine, a jet nozzle for ejecting jet water, and a steering nozzle swingable in the left-right direction. The axis of the water jet propeller is set with a rearwardly downward grad... | 07/05/2005 |
| 6901872 | Powered surfboard and powered skateboard A surfboard vehicle and a skateboard vehicle are each powered by a motor unit that is located in the rear of the vehicle and is located so the vehicle is balanced sufficiently to be used in competition and/or at high speeds. ... | 06/07/2005 |
| 6716263 | Air suction device for use in surface boat An air suction device for a surface boat having a filter element of paper type arranged in an air suction passage of an engine. The filter element is composed of a core made of a filter material and a permeable waterproof sheet arranged at the upstream side surface ... | 04/06/2004 |
| 6645018 | Boat propulsion device A vessel propulsion system having a suction casing (4) configured with a suction inlet (4a) opening at a vessel bottom (1b), a suction flow path (4b) inclined to rearwardly ascend from the suction inlet (4a), and an impeller chamber (4c) formed horizontal... | 11/11/2003 |
| 6575109 | Thruster screen A screen system for marine thrusters having at least one constrictor for reducing exit jet cross-sectional area to increase exit jet velocity of a thruster.... | 06/10/2003 |
| 6482055 | Water jet propulsion unit having linear weed grate clean-out system A mechanism for cleaning out an inlet grate of a water jet propulsion system. The mechanism includes an actuator and a wiper. The actuator penetrates and is supported by a through-hull housing installed in an opening in the hull. The actuator is linearly ... | 11/19/2002 |
| 6375523 | Personal watercraft (PWC) variable inlet/intake grate An inlet grate mounted within the inlet channel of a watercraft, where the inlet grate contains a pivotally mounted divider vane disposed laterally across the inlet channel and biased by a torsional spring into a neutral position. The hydrodynamic forces ... | 04/23/2002 |
| 6343964 | Jet boat with improved hull design and engine placement A jet powered boat may be provided with a water monitor for fire fighting purposes. The conduit for the monitor is connected to an opening through the bottom of the hull to draw water vertically from beneath the hull. Two motors are provided in the boat. ... | 02/05/2002 |
| 6283805 | Water jet propulsion type outboard motor A water jet propelling type outboard motor (1) is provided with a casing member (50), a frame (10), a motor (11), a gear case (13), a vertical driving shaft (12), a horizontal following shaft (14), a power transmission mechanism (15), and an impeller (5).... | 09/04/2001 |
| 6238256 | Arrangement for mounting propulsion unit to boat hull An arrangement for mounting a water jet apparatus to a hull of a marine craft. The hull has generallly horizontal and vertical sections and sidewalls which define a cavity in which an inlet housing of the water jet apparatus is installed. The inlet housin... | 05/29/2001 |
| 6224435 | Inlet structure for water jet apparatus mounted to boat hull A marine craft has with an inlet ramp, which increases in height as the inlet ramp extends rearward, and a cavity which communicates at its front with the rear of the inlet ramp. The cavity is open at its bottom and its rear. The marine craft is propelled... | 05/01/2001 |
| 6183319 | Closure preventive device for water jet propulsion type outboard motor A blockage preventing apparatus used for a water jet propulsion unit (2) is provided with a screen (6), springs (22), an engagement protrusion (21) and an engagement end portion (20a). The screen (6) is rotatably supported with respect to the front end of... | 02/06/2001 |
| 6168481 | Jet boat with improved hull design and engine placement A jet powered boat may be provided with a water monitor for fire fighting purposes. The conduit for the monitor is connected to an opening through the bottom of the hull to draw water vertically from beneath the hull. Two motors are provided in the boat. ... | 01/02/2001 |
| 6159060 | Protective shrouding with debris diverting inflow vanes for pump-jet propulsion unit A pump-jet type of outboard propulsion unit within a surrounding fluid mem for marine craft or the like, is protectively enclosed within cylindrical shrouding which forms an axial flow passage about the exhaust channel of the propulsion unit through whic... | 12/12/2000 |
| 6083063 | Pump jet apparatus with articulating weed grate clean-out system An operator-actuated inlet grate clean-out mechanism which can be actuated by pushing and pulling a cable or rotating a shaft from the driver's seat of a boat. A weed wiper which is arranged to push weeds off of a pivotable cantilever-tine inlet grate as ... | 07/04/2000 |
| 6033272 | Marine jet drive system with debris cleanout feature A marine jet propulsion system for a boat or the like comprises a power plant for rotating a drive shaft. A gear system is connected to the drive shaft and is configured to engage and rotate an impeller shaft. An impeller mounted to the impeller shaft is ... | 03/07/2000 |
| 5989083 | Water jet propulsion device for vessels A water jet propulsion device for a vessel in which a suction inlet 4 is open at a vessel bottom part in a vicinity of a stern, water suctioned from the suction inlet 4 to a suction duct 5 is pressurized by a spiral blade 10 provided in an impeller housin... | 11/23/1999 |
| 5876258 | Self-activating marine jet drive weed grate cleanout system A weed grate for a watercraft having a jet propulsion unit. The weed grate includes a plurality of cantilever tines each joined to a pivot rod. The cantilever tines extend across the inlet opening for the jet drive to prevent debris from entering through ... | 03/02/1999 |
| 5851130 | Watercraft intake debris cleaner A watercraft intake debris cleaner is provided including a watercraft having an outlet opening formed in a rear face thereof with a water propulsion mechanism mounted therein. An inlet opening is formed in a bottom face of the watercraft. A channel interc... | 12/22/1998 |
| 5846105 | Marine jet propulsion water inlet system A marine jet propulsion water inlet system having panels extending from the inlet opening at the bottom of a watercraft downstream, upward and rearwardly, in the water channel. The panels extend to the upper wall of the water channel or are integral with ... | 12/08/1998 |
| 5839927 | Water jet system The invention provides a water jet system with higher efficiency and better steering. The water jet system uses cantilever bars for an inlet grating, to prevent blockage. The water jet system also uses an elliptical impeller shaft housing to reduce turbul... | 11/24/1998 |
| 5779508 | Anticlogging water jet craft A water jet ski or boat that prevents weeds or grass from entering or clogging the intake grate area, is simple in construction and installation, operates automatically without operator intervention, and allows the craft to be beached and refloated withou... | 07/14/1998 |
| 5769674 | Jet drive for outboard motor A jet propulsion system for propelling a water craft through a body of water. The system includes a housing having a conduit formed therein for the passage of water, an inlet port and an outlet port. The inlet port has a lower edge which extends at least ... | 06/23/1998 |
| 5700169 | Inlet adapter for a personal watercraft An inlet adapter for a personal watercraft jet propulsion system is hydrodynamically designed to achieve optimum performance at both low and high watercraft speeds. The inlet adapter provides an inlet opening having a fixed geometry. A plurality of tines ... | 12/23/1997 |
| 5690520 | Weed removal apparatus for a jet pump propelled watercraft A weedless system has been developed for personal watercraft which obtain their power by using jet propelled water pumps. The unique weedless system has a number of elements which help to reduce weed congestion in the jet pump. Firstly, a plurality of dow... | 11/25/1997 |
| 5658176 | Marine jet propulsion system An improved water jet propulsion system for a jet propelled watercraft is disclosed designed to operate more efficiently. The improved propulsion system includes an adjustable water inlet duct, a larger pump, and an adjustable discharge nozzle. The inlet ... | 08/19/1997 |
| 5598804 | Device for clearing water intake grilles of water jet watercraft A device for clearing grilles covering water intake ports on watercraft whereby the grille may be easily cleared while remaining on or in the watercraft. The clearing device comprises at least one scraper that includes a base and a plurality of teeth exte... | 02/04/1997 |
