Direction Control For Fluid Jet Patents (Class 440/40)
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Patent number: 6415729Abstract: The present invention relates to an improved steering system for a water craft and an improved method of steering. The steering system includes at least two variable camber plates or rudders mounted to a hull of the water craft for imparting a steering force to the water craft. Each of the variable camber plates is preferably formed from a flexible material and has a leading edge affixed to the hull. A linkage mechanism is attached to a steering device on the water craft and causes at least one of the plates to move relative to the hull and thereby vary the camber of the at least one plate.Type: GrantFiled: December 14, 2000Date of Patent: July 9, 2002Assignee: The United States of America as represented by the Secretary of the NavyInventors: William H. Nedderman, Jr., James L. Dick, Charles H. Beauchamp
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Publication number: 20020049010Abstract: A watercraft of the jet propulsion type comprising a steering mechanism, a throttle control mechanism, a thrust mechanism, a throttle regulator and a controlled thrust steering system. The steering mechanism has a straight-ahead position. The steering mechanism is able to rotate in a clockwise direction from the straight-ahead position to a clockwise position and in a counter-clockwise direction from the straight-ahead position to a counter-clockwise position. The throttle control mechanism is biased toward an idle position. The thrust mechanism provides jet propulsion thrust for the watercraft. The throttle regulator regulates thrust provided by the thrust mechanism. The controlled thrust steering system causes the throttle regulator to increase thrust upon the steering mechanism rotating from the straight-ahead position to the clockwise position or the counter-clockwise position.Type: ApplicationFiled: May 14, 2001Publication date: April 25, 2002Inventors: Fred H. Bernier, Herman P. Christopherson, Frank Hazard
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Publication number: 20020049011Abstract: A watercraft includes an improved reverse thrust deflector assembly includes a locking mechanism that cooperates with first and second stops. The first stop establishes a raised position of a thrust deflector and the second stop established a lowered position of the thrust deflector. When in each of these positions, the locking mechanism engages the corresponding stop to inhibit unintentionally movement of the thrust deflector. The thrust deflector assembly includes a mounting bracket assembly that supports the thrust deflector about the discharge end of a corresponding jet propulsion unit. The bracket assembly extends forward of a discharge end of a discharge nozzle to support the thrust deflector at a position closer to the discharge end of a steering nozzle of the propulsion unit. The bracket assembly also includes hollow passageways through which various conduits and cables, which are used with the jet propulsion unit, can be routed.Type: ApplicationFiled: June 27, 2001Publication date: April 25, 2002Inventor: Noboru Suganuma
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Patent number: 6375522Abstract: The invention concerns a water sport machine consisting of a hull equipped with a pump-jet, the hull is rigid and provided with an inflatable envelope. The pump-jet consists of a light duty engine combined with a water sucking propeller located in a suction box opening into the hull bottom, the outlet of the suction box opening into a nozzle with decreasing cross-section and a helical wall.Type: GrantFiled: October 22, 1999Date of Patent: April 23, 2002Inventors: Marcel Bellens, Franck Mauvigner
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Patent number: 6363874Abstract: The present invention provides a propulsion system for a watercraft. The system includes a rotatable body adapted for fixed external mounting on a hull forward a transverse centerline of the watercraft. A prop is coupled to, and rotatable with, the rotatable body. The prop is coupled to a power transmission drive train, which is, in turn, coupled to a drive motor. The rotatable body is further coupled to an angular drive configured for orienting the prop to produce a thrust in a desired direction during operation.Type: GrantFiled: March 31, 2000Date of Patent: April 2, 2002Assignee: Bombardier Motor Corporation of AmericaInventor: Thomas E. Griffith, Sr.
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Patent number: 6332816Abstract: In a jet-propelled boat, a nozzle of a jet pump is constructed so as to be rotatable in response to steering by a rider of the boat in order to change a course of the boat. A rudder, that does not project downwards further than a boat bottom, is attached to an outer surface of the nozzle. A jet pump channel is provided for guiding a water flow to the jet pump. A rudder channel is provided separate from the jet pump channel and guides a water flow to the rudder. When a driving speed of the jet pump is stopped or slowed, the rudder will enable the course of the boat to be steered when the boat continues to move through the water due to its own inertia. The steering occurs because the direction of the nozzle and hence the rudder can be controlled by the boat's rider, and water will continue to be delivered to the rudder via the rudder channel. The rudder may be duct-shaped.Type: GrantFiled: June 22, 2000Date of Patent: December 25, 2001Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Masahiko Tsuchiya, Tomohisa Abe
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Patent number: 6308651Abstract: A boat featuring an autopilot-based steering and maneuvering system. The steering system uses a specially integrated autopilot that remains engaged unless the operator is actively commanding the boat to change course. For example, in a boat in which steering is performed using a joystick, course changes can be effected simply by moving (e.g., twisting) the joystick. That movement automatically disengages the autopilot, allowing the operator to achieve the course change. When the operator has completed the course change and released the joystick, a centering spring returns it to a neutral position and the autopilot automatically reengages. In the improved maneuvering system, the autopilot is used for controlling the direction of a waterjet boat during very low speed (e.g., less than 4 knots) maneuvers, such as docking. The autopilot controls the steering system, e.g.Type: GrantFiled: March 9, 2001Date of Patent: October 30, 2001Assignee: The Talaria Company, LLCInventors: Shepard W. McKenney, Kenton D. Fadeley
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Publication number: 20010010987Abstract: A waterjet-driven boat has a reversing bucket for controlling forward/reverse thrust and a rotatable nozzle for controlling sideward forces. A bucket position sensor is connected to the reversing bucket, and the bucket is controlled using the output of the position sensor to enable the bucket to be automatically moved to a neutral thrust position. Similarly, a nozzle position sensor is connected to the nozzle, and the nozzle is controlled using the output of the nozzle position sensor so that the nozzle may be automatically returned to a zero sideward force position. A joystick with two axes of motion may be used to control both the bucket and the nozzle. The joystick has built-in centering forces that automatically return it to a neutral position, causing both the bucket and nozzle to return to their neutral positions.Type: ApplicationFiled: March 16, 2001Publication date: August 2, 2001Applicant: The Talaria Company, LLC, a Delaware corporationInventors: Kenton D. Fadeley, Shepard W. McKenney, Thomas M. Serrao
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Patent number: 6244914Abstract: A water jet apparatus mounted to a horizontal hull section and having a shift and steering control assembly which penetrates a hole in that hull section. The shift and steering control assembly has a modular lever and shaft subassembly which is installed in the inlet housing, before the inlet housing is installed in the hull. The modular lever and shaft assembly includes a shift and steering control housing mounted to the inlet housing and having respective bores for housing shift and steering shafts. Upper shift and steering levers are coupled to the upper ends of the shift and steering shafts respectively, while lower shift and steering levers are coupled to the lower ends of the shift and steering shafts respectively. Respective control cables are attached to the upper levers inside the hull; respective control rods for operating a steering nozzle and a reverse gate are attached to the lower levers outside the hull.Type: GrantFiled: December 24, 1999Date of Patent: June 12, 2001Assignee: Bombardier Motor Corporation of AmericaInventors: Michael W. Freitag, Paul E. Westhoff, Richard M. McChesney, James R. Jones
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Patent number: 6244913Abstract: A propulsion unit assembly for a personal watercraft provides for the quick and easy alignment of a propulsion device of the assembly relative to the longitudinal axis of the watercraft when mounting the propulsion device on the hull of the watercraft. The mounting arrangement includes a mounting plate having stoppers which cooperate with bosses formed on the front wall of the tunnel of the watercraft to properly align the mounting plate before fixing the plate to the hull and mounting the propulsion device thereto. In addition, the disclosed propulsion unit assembly includes an integrally formed cooling water supply system which utilizes the existing high-capacity jet pump unit to provide pressurized cooling water for cooling of the engine and associated watercraft components.Type: GrantFiled: June 11, 1999Date of Patent: June 12, 2001Assignee: Yamaha Hatsudoki Kabushiki KaishaInventors: Chihiro Matsumoto, Mitsuhisa Hirano, Makoto Nagafusa
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Patent number: 6234100Abstract: A waterjet-driven boat has a reversing bucket for controlling forward/reverse thrust and a rotatable nozzle for controlling sideward forces. A bucket position sensor is connected to the reversing bucket, and the bucket is controlled using the output of the position sensor to enable the bucket to be automatically moved to a neutral thrust position. Similarly, a nozzle position sensor is connected to the nozzle, and the nozzle is controlled using the output of the nozzle position sensor so that the nozzle may be automatically returned to a zero sideward force position. A joystick with two axes of motion may be used to control both the bucket and the nozzle. The joystick has built-in centering forces that automatically return it to a neutral position, causing both the bucket and nozzle to return to their neutral positions.Type: GrantFiled: September 3, 1998Date of Patent: May 22, 2001Assignee: The Talaria Company, LLCInventors: Kenton W. Fadeley, Shepard W. McKenney, Thomas M. Serrao
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Patent number: 6231410Abstract: A watercraft of the jet propulsion type comprising a steering mechanism, a throttle control mechanism, a thrust mechanism, a throttle regulator and a controlled thrust steering system. The steering mechanism has a straight-ahead position. The steering mechanism is able to rotate in a clockwise direction from the straight-ahead position to a clockwise position and in a counter-clockwise direction from the straight-ahead position to a counter-clockwise position. The throttle control mechanism is biased toward an idle position. The thrust mechanism provides jet propulsion thrust for the watercraft. The throttle regulator regulates thrust provided by the thrust mechanism. The controlled thrust steering system causes the throttle regulator to increase thrust upon the steering mechanism rotating from the straight-ahead position to the clockwise position or the counter-clockwise position.Type: GrantFiled: November 23, 1999Date of Patent: May 15, 2001Assignee: Arctic Cat Inc.Inventors: Fred H. Bernier, Herman P. Christopherson, Frank Hazard
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Patent number: 6230642Abstract: A boat featuring an autopilot-based steering and maneuvering system. The steering system uses a specially integrated autopilot that remains engaged unless the operator is actively commanding the boat to change course. For example, in a boat in which steering is performed using a joystick, course changes can be effected simply by moving (e.g., twisting) the joystick. That movement automatically disengages the autopilot, allowing the operator to achieve the course change. When the operator has completed the course change and released the joystick, a centering spring returns it to a neutral position and the autopilot automatically reengages. In the improved maneuvering system, the autopilot is used for controlling the direction of a waterjet boat during very low speed (e.g., less than 4 knots) maneuvers, such as docking. The autopilot controls the steering system, e.g.Type: GrantFiled: August 19, 1999Date of Patent: May 15, 2001Assignee: The Talaria Company, LLCInventors: Shepard W. McKenney, Kenton D. Fadeley
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Patent number: 6193571Abstract: An improved waterjet propulsor that uses differential static pressure from the water flowing through and around the propulsor to provide additional thrust via internal and external vanes. Uniform water velocity is also created by the vanes within the propulsor. A boat trimming system is incorporated as part of the waterjet discharge nozzle.Type: GrantFiled: August 16, 1999Date of Patent: February 27, 2001Inventor: Donald E. Burg
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Patent number: 6159059Abstract: A watercraft of the jet propulsion type comprising a steering mechanism, a throttle control mechanism, a thrust mechanism, a throttle regulator and a controlled thrust steering system. The steering mechanism has a straight-ahead position. The steering mechanism is able to rotate in a clockwise direction from the straight-ahead position and in a counter-clockwise direction from the straight-ahead position. The throttle control mechanism is biased toward an idle position. The thrust mechanism provides jet propulsion thrust for the watercraft. The throttle regulator regulates thrust provided by the thrust mechanism. The controlled thrust steering system causes the throttle regulator to increase thrust upon the steering mechanism rotating from the straight-ahead position.Type: GrantFiled: November 1, 1999Date of Patent: December 12, 2000Assignee: Arctic Cat Inc.Inventors: Fred H. Bernier, Herman P. Christopherson, Frank Hazard
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Patent number: 6152792Abstract: A waterjet steering and reversing apparatus has a steering nozzle mounted aft of the exit nozzle for pivotal movement about a steering pivot axis that lies in a vertical plane and a reversing deflector that is mounted for pivotal movement about a reversing pivot axis for movement between an inactive position clear of a water jet discharged from the steering nozzle and an operative position in which the water jet impinges on a surface that deflects the water jet to a direction having a forward vector. The reversing pivot axis is perpendicular to the vertical plane and spaced apart from the steering pivot axis. A rotatable steering shaft is coupled at its lower end to the steering nozzle, is coaxial with the steering pivot axis, extends upwardly through an opening in the hull, and has an upper end portion located within the hull. A hollow reversing shaft received telescopically over a portion of the steering shaft is translatable axially relative to the steering shaft.Type: GrantFiled: March 9, 1999Date of Patent: November 28, 2000Assignee: Bird-Johnson CompanyInventors: Francesco Lanni, Gregory P. Platzer
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Patent number: 6146219Abstract: A simple and efficient reverse propulsion and control means for water jet powered boats which includes a sliding water valve for controlling exhaust thrusters mounted around the peripheral of the boat and which is coordinated with pivotal movement of the main thruster nozzle.Type: GrantFiled: March 9, 1999Date of Patent: November 14, 2000Assignee: Outboard Marine CorporationInventor: Clarence E. Blanchard
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Patent number: 6105528Abstract: A steering handle apparatus for a watercraft provided with a steering shaft comprises a housing attached to the body of the watercraft, a tube member supported on the housing so as to be able to tilt back and forth around a pivot portion and including a gear portion and a guide hole through which the steering shaft is passed, a locking member including a fitting portion movable between a locking position for engagement with the gear portion and an unlocking position for disengagement from the gear portion, and an operating member including a retaining portion for moving the locking member. The operating member is operable between an up position in which the locking member is moved to the unlocking position and a down position in which the locking member is moved to the locking position.Type: GrantFiled: June 4, 1999Date of Patent: August 22, 2000Assignees: NHK Morse Co., Ltd., Yamaha Hatsudoki Kabushiki KaishaInventors: Shigeru Kuroi, Takaaki Madachi
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Patent number: 6086436Abstract: A pump frame (7) incorporates an upper opening (17), a lower opening (19) and a water passage (21) for connecting the two openings. To cause the lower opening (19) to be opened in water at a position adjacent a stern (1a) of a ship (1), the pump frame (7) is joined to a bottom (1b) of a ship (1). A pump casing (9) is secured to be stood erect above the pump frame (7). The pump casing (9) includes an impeller main shaft (33) stood erect. The impeller main shaft (33) is provided with an impeller (11) for sucking water from below the bottom (1b) through the lower opening (19) so as to pressurize the water. Water pressurized by the impeller (11) is jetted to a position behind the stern (1a) through a discharge pipe (13). As a result, the ship (1) is propelled. The foregoing water jet propulsion apparatus (5) enables sucking performance free from cavitation and excellent propelling performance to be obtained.Type: GrantFiled: August 11, 1998Date of Patent: July 11, 2000Assignee: Ishigaki Company LimitedInventor: Eiichi Ishigaki
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Patent number: 6024038Abstract: A side thruster comprises a valve, a first water passageway, a second water passageway, a third passageway, a fourth passageway and a pump having an inlet and an outlet. The valve housing includes a first, second, third and fourth ports and a two-position barrier situated within the housing. When in the first position, the barrier connects the first port with the second port and the third port with the fourth port. When in the second position, the barrier connects the second port with the third port and the fourth port with the first port. The first passageway extends between the first port and a first side opening on a first side of the boat. The second passageway extends between the third port and a second side opening on a second side of the boat. The third water passageway extends between the second port and the pump outlet. The fourth water passageway extends between the pump inlet and the fourth port.Type: GrantFiled: October 15, 1998Date of Patent: February 15, 2000Assignee: Timing Systems, Inc.Inventors: Robert L. Kiliz, Michael J. Devie
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Patent number: 5930856Abstract: Automatic swimming pool cleaning systems are disclosed. The systems include an automatic swimming pool cleaner incorporating one or more curved wipers protruding from its lower surface. The wipers and flat bottom of the cleaner induce a vortex as fluid flows to its central inlet, entraining debris in the flow. A fluted throat surrounding the inlet additionally assists the interior of the base of the cleaner in retaining debris when opened for cleaning, additionally providing an improved flow path for enhanced debris pick-up. Alternate embodiments incorporate a rudder and resistance plate for enhancing movement of the cleaners in the presence of obstacles. Also disclosed is a valve useful for controlling and indicating the rate of fluid flow to a cleaner. Included within the valve is a plunger attached to a spring, with the spring force opposing fluid flow through the valve.Type: GrantFiled: April 8, 1997Date of Patent: August 3, 1999Assignee: Baracuda International Corp.Inventors: Hendrikus Johannes Van Der Meyden, James D. Scott, II
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Patent number: 5846104Abstract: A water diverting apparatus for adaptation to a recreational motor ski vehicle. The apparatus provides a water rooster tail during the operation of the motor ski vehicle without degrading the nominal speed of the motor ski vehicle or preventing agile maneuvering of the motor ski vehicle.Type: GrantFiled: March 10, 1997Date of Patent: December 8, 1998Inventor: Daniel P. Corcoran
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Patent number: 5800222Abstract: A number of embodiments of jet propulsion systems for watercraft that employ twin impellers contained within a common housing assembly at the end of a common inlet duct having a single water inlet opening that can be positioned centrally of the watercraft to avoid drawing air in during abrupt maneuvering. By using twin impellers, the use of straightening vanes can be substantially eliminated. In addition, a small dividing wall extends from the area forwardly of the impellers only into the water inlet ducts sufficiently so as to reduce counter-effects of swirling from between the two impellers and without requiring any substantial change in direction of the water flow from the water inlet opening to the impellers.Type: GrantFiled: August 11, 1995Date of Patent: September 1, 1998Assignee: Sanshin Kogyo Kabushiki KaishaInventor: Masayoshi Nanami
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Patent number: 5605110Abstract: A multi-use watercraft wherein one or more bays are formed in the aft portion thereof for respectively docking one or more personal watercraft (PWC). The PWCs are connected to provide propulsion for the multi-use watercraft when so docked in the bay. The multi-use watercraft and the PWCs may be separated and used independently while on the water. The PWCs may also be docked in the bay of the multi-use watercraft while on the water. A scoop proximal to the jet pump nozzle of each PWC is provided to enable the multi-use watercraft to go in the reverse direction. Also provided is the ability to sail the multi-use watercraft. Mast, rudders and dagger board may be installed while on the water thus allowing the multi-use watercraft to use wind for propulsion. The multi-use watercraft may be converted to sailing mode with or without the PWCs being docked. An inboard motor may also power the multi-use watercraft.Type: GrantFiled: October 11, 1994Date of Patent: February 25, 1997Assignee: Aerotrans CorporationInventor: Dennis W. Talbot
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Patent number: 5582125Abstract: A jet propelled watercraft having a pair of jet propulsion units and a pair of powering internal combustion engines with a handlebar assembly for effecting steering of the watercraft. First and second throttle controls are carried by the handlebar assembly for controlling the speed of the engine so as to permit the operator to accelerate one engine upon turning, without taking his hands from the steering control to effect a sharper turn.Type: GrantFiled: October 25, 1993Date of Patent: December 10, 1996Assignee: Sanshin Kogyo Kabushiki KaishaInventor: Chihiro Matsumoto
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Patent number: 5507672Abstract: A jet propelled watercraft having a discharge nozzle that can be adjusted for trim and an electrically operated trim condition indicator is provided for giving the rider the indication of the actual trim condition of the watercraft. In addition, an automatic trim control mechanism is provided that permits the operator to set the desired trim at varying watercraft speeds and the trim will be automatically set when those speeds are reached.Type: GrantFiled: December 9, 1994Date of Patent: April 16, 1996Assignee: Yamaha Hatsudoki Kabushiki KaishaInventor: Hirofumi Imaeda
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Patent number: 5421753Abstract: This invention relates to a marine jet drive having improved operation, especially in regard to having efficient adaptation to propulsion engine and hull design; having a drive shaft with flexible coupling at each end, internal to the jet drive; having through-the-nozzle engine exhaust; having simplified, combined means of steering and reversing; having controllable nozzle aperture and trim control; having combination reverse flow deflector and trim plane; having means to disengage the engine from the jet to obtain true neutral; having protection from and removal of debris in the water intake duct; generally having fewer overhauls, easier serviceability and lighter weight.Type: GrantFiled: May 13, 1991Date of Patent: June 6, 1995Inventor: Paul W. Roos
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Patent number: 5387141Abstract: A navigation stabilizing system for a water jet propulsion vessel which includes a water jet unit that has an impeller housing in which an impeller is positioned for drawing water through a water inlet and discharging it through a discharge port in the housing for propulsion of the water vessel. The vessel further includes a rudder which is disposed behind the water inlet port and set off center of the water inlet port and off center of the center line of the hull of the vessel.Type: GrantFiled: March 18, 1992Date of Patent: February 7, 1995Assignee: Sanshin Kogyo Kabushiki KaishaInventors: Makoto Toyohara, Kiyonobu Kobayashi
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Patent number: 5376027Abstract: 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 a fluid discharge opening at the rearward end. A tubular support is joined to the housing for mounting such upon a water craft. An inlet scoop extends outwardly from the housing and directs water to the fluid inlet opening. The scoop is provided with a rigid tube having a first end secured about the fluid inlet opening and a second end terminating at forwardly directed duct remote from the exterior surface of the housing. The scoop further includes a screen set within the forwardly directed duct for preventing debris from entering the housing interior. An impeller is rotationally secured within the housing adjacent the fluid inlet opening. Rotation of the impeller draws water through the inlet opening and discharges it through the outlet with jet-like force.Type: GrantFiled: March 21, 1994Date of Patent: December 27, 1994Inventor: Joseph J. Hergenrather
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Patent number: 5362269Abstract: A jet motor powered water vehicle is disclosed which is designed for single person use. The jet powered boat includes a deck having a flat surface portion enabling a person to lie prone thereon while manually controlling the motor and steering the boat by utilizing of a joystick mounted on the deck. The hull of the boat has a generally wide and shallow V-shaped configuration at a bore, lower portion thereof. The hull also has a flat bottom surface at mid and aft lower portions thereof which blend with the V-shape. The hull also includes a rear portion which is curved and upwardly slanted at a lower portion thereof. The boat also includes a transom which is generally rounded for improved aquadynamics, and a shroud generally enclosing the nozzle for the motor impeller is contoured and shaped to generally conform to the V-point of the hull in order to enhance aquadynamics of the hull.Type: GrantFiled: October 29, 1992Date of Patent: November 8, 1994Inventor: Peter M. Leach
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Patent number: 5256090Abstract: An accessory device that produces a variable-aperture orifice in the outlet pipe of conventional water-jet nozzles. In one embodiment, the attachment is mounted on the exterior of the outlet pipe; in another, it is installed as an insert inside the outlet pipe. The device comprises two opposite, substantially semi-cylindrical shells slidably coupled along their longitudinal edges and hingedly connected at one end to form a cylindrical structure which is capable of deformation at the other, free end to produce a variable cross-section. The aperture of the structure at the hinged end is sized to fit tightly with the size of the nozzle's outlet pipe, while the cross-section at the free end may be progressively reduced by clamping the two shells together. A clamping mechanism, such as a hydraulic bladder or a cable-driven clamp, is mounted around the free end and is used to reduce its cross-sectional size during operation of the watercraft.Type: GrantFiled: December 21, 1992Date of Patent: October 26, 1993Inventor: Russell C. Woolley
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Patent number: 5218922Abstract: 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.Type: GrantFiled: June 8, 1992Date of Patent: June 15, 1993Assignee: Yamaha Hatsudoki Kabushiki KaishaInventor: Noboru Kobayashi
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Patent number: 5217399Abstract: Marine apparatus comprising a member adapted to be mounted on a boat for pivotal movement relative thereto about an axis, and control structure for causing pivotal movement of the member about the axis, the structure including a hydraulic assembly having one end adapted to engage the boat and an opposite end engaging the member, the hydraulic assembly including a cylinder, a piston dividing the cylinder into first and second chambers, and a piston rod which is fixed to the piston and which extends through the second chamber, and structure utilizing water pressure created by relative movement between the boat and the body of water in which the boat is operating for pressurizing the hydraulic assembly, the pressurizing structure including a conduit having one end which opens forwardly and which is adapted to communicate with the body of water, and having an opposite end communicating with the first chamber, and the pressurizing structure permitting the pressure in the first chamber to decrease in response to deType: GrantFiled: October 9, 1991Date of Patent: June 8, 1993Assignee: Outboard Marine CorporationInventor: Charles D. Strang
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Patent number: 5154650Abstract: A jet propulsion unit for a small watercraft that incorporates a mechanism for actuating the reverse thrust bucket through an intermediate lever so as to permit a flexible cable to be employed that lies closely above the jet propulsion unit. The actuating device is constructed so as to provide self-locking of the reverse thrust bucket in at least one of its positions. Various linkage arrangements for achieving the interrelationship are disclosed.Type: GrantFiled: August 3, 1990Date of Patent: October 13, 1992Assignee: Sanshin Kogyo Kabushiki KaishaInventor: Ryoichi Nakase
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Patent number: 5151057Abstract: A watercraft propelled by a jet propulsion unit that is positioned within a tunnel in the underside of the watercraft. The jet propulsion unit is supported for pivotal movement about a horizontally extending transverse pivot access and the housing of the jet propulsion unit is divided into separate components so that the water inlet portion may be rotated to an upwardly facing service position without rotation of the discharge nozzle, steering nozzle, or reverse thrust buckets associated therewith. As a result, an extremely rigid support is accomplished which nevertheless permits ease of servicing.Type: GrantFiled: April 4, 1991Date of Patent: September 29, 1992Assignee: Yamaha Hatsudoki Kabushiki KaishaInventors: Noboru Kobayashi, Yoshiki Futaki
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Patent number: 5145426Abstract: A V bottom hull watercraft powered by a pair of jet propulsion units that are supported for pivotal movement about horizontally disposed pivot axes and rotary movement about a longitudinal pivot axis to rotate the water inlet openings and elevate them from a downwardly facing normal operating position and an upwardly facing service position. The water inlet openings are disposed so that they extend parallel to the sides of the V bottom. Steering nozzles are supported for pivotal movement at the discharge ends of the jet propulsion units and pivot about vertically extending axes that are not perpendicular to the water inlet openings so that no vertical thrust will be exerted on the watercraft hull when the steering nozzles are pivoted to effect steering.Type: GrantFiled: June 27, 1991Date of Patent: September 8, 1992Assignee: Yamaha Hatsudoki Kabushiki KaishaInventors: Noboru Kobayashi, Hirofumi Imaeda
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Patent number: 5129343Abstract: A vessel (10) has a semi-displacement or semi-planing round bilge hull (11) characterized by low length-to-beam ratio (between about 5.0 to 7.5) and utilizing hydrodynamic lift. The bottom (15) of the hull (11) rises toward the stern (17) and flattens out at the transom (30). Four waterjet propulsion units (26, 27, 28, 29) are mounted at the transom (30 ) with inlets (31) arranged on the hull bottom (15) just forward of the transom (30) in a high pressure area. Water under high pressure is directed to the pumps (32) from the inlets (31). Eight marine gas turbines arranged in pairs (36/37, 38/39, 40/41, 42/43) power the waterjet propulsion units (26, 27, 28, 29) through combined gearboxes (44, 45, 46, 47) and cardan shafts (48, 49, 50, 51).Type: GrantFiled: April 1, 1991Date of Patent: July 14, 1992Inventor: David L. Giles
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Patent number: 5129846Abstract: A vessel propulsion system, the vessel having longitudinally spaced forward and rearward zones comprising a motor-driven pump having a suction inlet and a discharge outlet; two laterally spaced, forwardly directed jet openings to the vessel forward zone, and two laterally spaced, rearwardly directed jet openings at the rearward zone; structure including multiple valves in fluid path communicating between the jet openings and the pump suction inlet, and between the jet openings and the pump discharge outlet; and also between the forward and rearward jet openings, and; control structure to selectively control the valves to cause water jetting in directions to alternatively:propel the vessel forwardlypropel the vessel rearwardlybrake vessel movementturn the vessel to the rightturn the vessel to the left.Type: GrantFiled: January 7, 1991Date of Patent: July 14, 1992Assignees: Berge A. Dimijian, Beverly Rodeo Development CorporationInventor: Berge A. Dimijian
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Patent number: 5090929Abstract: Paired spaced electrically driven motors provide a steerable propelling system for small boats. Each motor drives a propeller carried in an elongate channel, communicating from each lateral side of a boat beneath the water line to one boat end, to move water through such channels for boat propulsion. The electrical motors are of variable speed, reversible, and separately controlled by a joystick type control device to provide differential control of motor speed to allow steerage. The propelling system provides a low speed, maneuverable propulsion system for fishing use, as an auxiliary power system for boats having a separate principal powering system, and to aid maneuverability alone or in conjunction with the principal powering system.Type: GrantFiled: April 12, 1991Date of Patent: February 25, 1992Inventor: Leo R. Rieben
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Patent number: 5067918Abstract: A small watercraft having a jet propulsion unit with a flow directing device for creating a rooster tail spray and a reverse thrust bucket that is formed with clearances so as not to interfere with the spray when operating in the forward direction and to permit the reverse thrust bucket to move to its reverse position without interference from the flow directing device.Type: GrantFiled: December 18, 1989Date of Patent: November 26, 1991Assignee: Yamaha Hatsudoki Kabushiki KaishaInventor: Noboru Kobayashi
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Patent number: 5045003Abstract: A number of embodiments of steering nozzles for jet propulsion watercraft that are configured so as to achieve different steering effects to suit particular watercraft or rider's preferences. The different steering effect is achieved through the use of varying the shape of the discharge opening of the steering nozzle.Type: GrantFiled: August 1, 1989Date of Patent: September 3, 1991Assignee: Sanshin Kogyo Kabushiki KaishaInventor: Kenji Ikeda
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Patent number: 5016553Abstract: The device comprises a thruster assembly which consists of a housing, thruster motor, thruster propeller, and thruster motor control device. When integrated into a stern mounted main drive, the thruster housing becomes integral with the main drive. The thruster is situated on the transom just above the bottom line of the hull with its axis in line with the transom, horizontal with the water line, and at right angles to the main drive. The thruster control device is connected to the boat's steering wheel linkage so that when the wheel is turned the thruster is activated. Turning the steering wheel causes the thruster to push the boat's stern at right angles to the main drive thus causing the boat to turn. The direction the wheel is turned determines the direction of thrust (right or left) and therefore, the direction the boat turns. Additionally, thruster control can be achieved by connecting the thruster control device to the throttle/shift lever.Type: GrantFiled: December 4, 1989Date of Patent: May 21, 1991Inventor: William P. Spencer
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Patent number: 5014912Abstract: A displacing device for a swimming pool cleaner has a hollow housing with a cylindrical wall and end walls. Within the housing are two spaced partitions which divide the interior of the housing into three chambers. A first and second chamber have openings in the cylindrical wall with jet nozzles projecting therefrom. A ball is located in each of the first and second chambers which close off one opening at a time so that water then flows out of the or each other opening that is open. One end wall and the partitions each have an aperture in which a tube is slidable. The tube has holes so that water fed into the tube at one end flows through the tube and out through the holes into the first or the second chamber, depending on the position of the tube. The tube is moved up and down by an engine that does not form part of this invention. The outer end wall has a connector for connection to a source of pressurized water.Type: GrantFiled: December 5, 1988Date of Patent: May 14, 1991Assignee: Oakleigh, Ltd.Inventor: David A. Brooks
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Patent number: 4895093Abstract: The invention is a manoeuvring device for boats, comprised of a pair of pivotal tube plates (17, 18) mounted outside a propeller 14 and, under normal operation, forming a tube (19) around the propeller. These plates can be swung to one side relative to a medial position to enable sideways steering of the vessel, and be brought together astern of the propeller to form a blade when reversing. The tube plates (17, 18) extend down beneath the propeller (beside 19B). A tube wing (20), extending in a longitudinal direction, is mounted immediately beneath the propeller (14) and is arched upwards towards the propeller wings. Under normal operation, a tube that is sickle-shaped in cross section is delimited between the tube wing and the lower portion of the tube plates. The pivot axis of the tube plates (17, 18) is preferably located close to the propeller wing plane.Type: GrantFiled: July 20, 1988Date of Patent: January 23, 1990Inventor: Ola K. Dalsbo
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Patent number: 4838821Abstract: A drive mechanism particularly for flat-bottomed watercrafts with at least one centrifugal pump or the like producing a water jet, which pump is arranged closely above the intake opening within the watercraft and within an elbow which is pivotal for controlling the watercraft and the blades or the like of which pump are connected by a ring or the like.Type: GrantFiled: September 2, 1988Date of Patent: June 13, 1989Assignee: Schottel-Werft Josef Becker GmbH & Co. KGInventor: Franz Krautkremer
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Patent number: 4681550Abstract: An aquatic ride for use in swimming pools of the type having a high water pressure source and line to power a pool cleaning apparatus associated therewith having a support for a person in the pool, a water outlet on the said support operatively and removably connected to the high pressure line, and a valve interposed between the outlet and the high water pressure source whereby the support is guided by controlling high pressure water through the outlet means.Type: GrantFiled: October 11, 1985Date of Patent: July 21, 1987Inventor: Dean B. Koenig
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Patent number: 4652244Abstract: A stream of water is caused to move through a duct carried within the hull of a water craft and is discharged as a jet in a direction which is non-directional to the craft. The jet is redirected, as by a plate or nozzle, to impart movement to the craft in a selected direction.Type: GrantFiled: April 8, 1985Date of Patent: March 24, 1987Inventor: Donald Drury
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Patent number: 4509923Abstract: Hydraulic jet propulsion apparatus having steering deflectors which are hydraulically balanced which operate against a seal to reduce spillage and to reduce jamming ans which will provide a smooth contour for the flow of water while not restricting the cross-sectional area of the jet stream. The apparatus also provides a reversing duct which is operable to intercept the jetstream, downstream of the steering deflectors so that the jetstream is divided into two streams the relative proportions of which depend upon the operation of the steering means each stream being turned while in the duct through an angle in excess of 90 degrees to emerge in diagonal directions respectively forward-to-port and forward-to-starboard so as to produce a reverse thrust with steering dependant on the relative proportions of flow in the two streams.Type: GrantFiled: November 10, 1981Date of Patent: April 9, 1985Assignee: C.W.F. Hamilton & Company LimitedInventor: Robert S. Turnbull
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Patent number: 4455960Abstract: An improved boat thruster system including a pump for drawing water through an inlet in the boat hull and for discharging water through first and second pipes connected to outlets located on either side of the hull. A valve is installed in each of the pipes to control the flow of water therethrough. The valves may be controlled by either an open or closed loop control system configured so as to prevent both outlet pipes from being closed at the same time during system operation. Each valve is preferably comprised of multiple vanes each of which is mounted for rotation about an off center axis such that in the event of a valve control system failure, the water flow will cause the valve to open rather than close thereby preventing undesirable high pressure buildup in the system.Type: GrantFiled: November 10, 1981Date of Patent: June 26, 1984Assignee: Omnithruster, Inc.Inventor: Charles M. Aker
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Patent number: 4437841Abstract: A steering apparatus for an outboard jet engine utilizes a channel or conduit along the underside of a boat hull in combination with a channel or conduit extension member to guide water to the inlet port of the jet outboard propulsion apparatus, the bottom lip of the inlet port being disposed proximate the extended bottom surface of the underside of the boat hull with the top lip or rim of the inlet port being disposed proximate the extended top surface of the channel of conduit along the hull to permit propulsion and steering of the boat while the boat hull is planing along the surface of water only inches or centimeters above the bed of the lake, river or ocean.Type: GrantFiled: November 4, 1981Date of Patent: March 20, 1984Inventor: Richard C. Stallman