Abstract: A watercraft for extending the utility of a small personal watercraft designed to accommodate only one or two riders. The watercraft is comprised of a main hull that is devoid of any propulsion device and which defines a berthing area into which the smaller watercraft may be driven. The berthing area and the smaller watercraft are designed so that the propulsion device of the smaller watercraft may power the main hull when it is in the berthing area. A fuel supply system is provided in the main hull for transferring fuel to the smaller watercraft to extend the range of the combined watercraft.

Abstract: A patrol or rescue boat that is formed with a catamaran hull so as to provide a generally open deck area that extends through the rear of the transom for facilitating the transfer of injured persons onto the deck area from the body of water. In addition, a removable front deck is also provided. The rear deck has a pivotal portion so as to facilitate transfer of injured persons onto the deck and then to form an enclosure so that heated water can be flooded into the deck from the cooling jacket of the engine so as to heat an injured person.

Abstract: A small watercraft having a generally open passengers area with a cowling portion that is movable between a position closing the forward portion of the passengers area and a forwardly extending deck and a raised position to access the passengers area to provide at least a partial cover over it. In one embodiment the cowling portion also covers a centrally positioned joy stick and in another embodiment the watercraft control is mounted on the cowling portion.

Abstract: A number of embodiments of towing and towed watercrafts with particular emphasis on the construction and operation of the towed watercraft. The towed watercraft is formed with a hull that is configured to accommodate the water flow from a jet propulsion unit driving the towing watercraft so as to reduce resistance and improve the flow resistance of the towed watercraft. The towed watercraft has its seat disposed below the seat of the towing watercraft so an operator on the towing watercraft will not have his rearward vision impaired. A wide variety of traction devices are disclosed, each having a rigid tow bar and an arrangement for precluding pivotal movement of the towed watercraft relative to the towing watercraft upon deceleration of the towing watercraft. Arrangements are also disclosed wherein an outboard motor may be positioned in a container of the towed watercraft for auxiliary power of the towed watercraft.

Abstract: 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 trim adjusted positions to an upward out of the water position. In addition, the jet propulsion unit is rotatable about a horizontal longitudinally extending axis so that its downwardly facing water inlet portion may be rotated upwardly for access through an access opening in the hull for servicing. In one embodiment, the jet propulsion unit is only rotatable about the horizontal longitudinally extending axis. A number of embodiments of rudder assemblies are also depicted supported by the steering nozzle for generating steering effects when the steering nozzle is not generating a significant steering effect and which may be pivoted to an out of the water position for protection when underwater obstacles are struck.

Abstract: A small watercraft of the type designed to be ridden by a single rider and powered by a jet propulsion unit. The hull is designed so as to assist stability in the straight ahead running condition and also to permit a wide variety of turning conditions including spin and edging turns. The rider may achieve the different types of turns depending on whether he shifts his weight forwardly or rearwardly and the hull is designed so as to provide good stability under all of these conditions.

Abstract: Several embodiments of water jet propulsion units that are manually moveable between a downwardly facing in-the-water position and a raised, out-of-the water position. The movement includes pivotal movement about a transversely extending horizontal pivot axis and rotation about a longitudinally extending rotational axis. Latching apparatus are disclosed for holding the jet propulsion unit in at least one of its positions and in one embodiment the latching apparatus is effective to hold the jet propulsion unit in each position.

Abstract: A jet propulsion unit for powering a watercraft that is contained within a tunnel on the underside of the hull of the watercraft. The jet propulsion unit is rotatable about a longitudinally extending axis to rotate its water inlet opening from a downwardly facing position to a raised, out of the water storage and service position The drive for rotating the jet propulsion unit is positioned forwardly of the tunnel and out of the body of water in which the watercraft is operating.

Abstract: 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 trim adjusted positions to an upward out of the water position. In addition, the jet propulsion unit is rotatable about a horizontal longitudinally extending axis so that its downwardly facing water inlet portion may be rotated upwardly for access through an access opening in the hull for servicing. In one embodiment, the jet propulsion unit is only rotatable about the horizontal longitudinally extending axis. A number of embodiments of rudder assemblies are also depicted supported by the steering nozzle for generating steering effects when the steering nozzle is not generating a significant steering effect and which may be pivoted to an out of the water position for protection when underwater obstacles are struck.

Abstract: Several embodiments of jet propelled watercraft that incorporate an arrangement for hydraulically pivoting the jet propulsion unit between a normal position and a raised position and for rotating the water inlet portion of the jet propulsion unit from a downwardly facing direction to an upwardly facing service position. Hydraulic motors are employed for achieving both motions and are actuated through a common circuit for achieving sequential movement. In one embodiment, the rotary hydraulic motor is formed integrally within portions of the housing of the jet propulsion unit to provide a compact assembly.

Abstract: In order to supply water into a water tank mounted on a train, a position detecting apparatus and method is developed for assisting connection of the tube coupler of the water tank with the tube coupler attached to the working terminal of a robot placed on the ground. Either one of the train and the working terminal of the robot is provided with a target circuit composed of a target coil and a capacitor connected in parallel while the other is provided with an excitation circuit, a sensor coil and a detector. The excitation circuit is provided with a power coil driven by an AC power source for generating magnetic field to induce current in a target coil. The magnetic flux center line of the sensor coil is orthogonal to that of the power coil so that the sensor coil does not sense the magnetic field generated by the power coil but senses only the magnetic field generated by the target coil. The output level of the sensor coil corresponds to the relative positions of the target coil and the sensor coil.

Abstract: A seating arrangement for a small watercraft that will accommodate either an operator alone or with one, two or three passengers while maintaining side by side stability. The seating arrangement provides an operator's seat on the longitudinal center line of the watercraft, a passenger seat adapted to receive a single passenger to the rear of the operator's seat and seated in straddle fashion and a further pair of passengers seats spaced from the longitudinal center line and to the rear of the single passenger seat.

Abstract: A small watercraft of the jet propulsion type having a cockpit that is adapted to accommodate either one or two riders. When one rider is accommodated he may sit in the center of the seat and operate the watercraft from the center thereof. When two riders are positioned, one may be the operator and may operate the watercraft from one side thereof. To permit this, a steering control is disclosed that is moveable by a power device between either a central or side position. In one embodiment, the power device comprises an electrical motor and in another embodiment the power device comprises a hydraulic motor driven by a reversible electric motor and reversible fluid pump.

Abstract: A railway vehicle bogie has a pair of levers and twos pairs of links driven by the pair of levers so as to swivel axles. The front and rear axle boxes are spaced longitudinally of the bogie frame and are angularly displaceably mounted at the centers thereof to the bogie frame. The axle boxes carry a vehicle body thereon and support axles therein. First links are angularly displaceably connected to the front axle box while second links are angularly displaceably connected to the rear axle box. A pair of levers are spacedly disposed transversely of the bogie frame and angularly displaceably connected at their intermediate portions to the bogie frame. One of the levers is angularly and displaceably connected to the distal ends of one of the first links and one of the second links thereto while the other is angularly and displaceably connected to the distal ends of the other of the first links and the other of the second links thereto.

Abstract: Several embodiments of watercraft hulls propelled by dual jet propulsion units. The jet propulsion units are either received within a common tunnel or a pair of separate tunnels of the watercraft hull and are moveable for servicing and to bring the jet propulsion units out of the water when the watercraft is not being operated but still is in the body of water.

Abstract: A jet propelled watercraft that is pivotal about a transversely extending horizontally disposed axis for raising the jet propulsion unit from the body of water in which it is operating and also for trim adjustment of the jet propulsion unit. A trim plate is affixed to the under side of the jet propulsion unit and spans a pair of side walls defining the tunnel opening in which the jet propulsion unit is received for providing trim adjustment of the watercraft upon trim movement of the jet propulsion unit. Sealing arrangements are disclosed for providing sealing around the jet propulsion unit water inlet opening during the trim adjustment.

Abstract: A water jet propelled watercraft having a hull defining a downwardly facing water inlet opening and a jet propulsion unit contained within the hull and having a water inlet opening portion through which water is drawn, an impeller portion containing an impeller for drawing the water and a discharge nozzle portion through which the water pumped by the impeller is discharged for powering the watercraft. The jet propulsion unit is supported for pivotal movement within the hull about a transversely extending horizontal axis. The water inlet opening of the jet propulsion unit water inlet portion and a corresponding portion of the hull water inlet opening are defined by mating flanges that lie in a plane that contains the horizontal pivotal axis to minimize sealing pressure variations on the seal therebetween.

Abstract: A small personal water propulsion system adapted to be worn on the body of a user for propelling a user through a body of water. The propulsion system includes a back mounted battery pack and an electrically powered propulsion motor that is pivotally carried by the battery pack for movement between a front propulsion position and a raised storage position.

Abstract: A small watercraft of the type designed to be ridden by a single rider and powered by a jet propulsion unit. The hull is designed so as to assist stability in the straight ahead running condition and also to permit a wide variety of turning conditions including spin and edging turns. The rider may achieve the different types of turns depending on whether he shifts his weight forwardly or rearwardly and the hull is designed so as to provide good stability under all of these conditions.

Abstract: Several embodiments of jet propelled watercraft including steering rudders pivotally supported by the steering nozzle of the jet propulsion unit for providing a steering affect at low speeds and when coasting. The steering rudder is selectively moveable between its steering position and non-steering position so as to permit unincumbered high speed operation. An arrangement is incorporated that permits the rudder to pivot automatically from its steering position to an out of the way position when an underwater obstacle is struck.