US3918256A - Throttle-reverser control system for water jet propelled seacraft - Google Patents

Throttle-reverser control system for water jet propelled seacraft Download PDF

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Publication number
US3918256A
US3918256A US478171A US47817174A US3918256A US 3918256 A US3918256 A US 3918256A US 478171 A US478171 A US 478171A US 47817174 A US47817174 A US 47817174A US 3918256 A US3918256 A US 3918256A
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US
United States
Prior art keywords
potentiometer
throttle
engine
reverser
controlling
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US478171A
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English (en)
Inventor
Francis C Ashleman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Boeing Co
Original Assignee
Boeing Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Boeing Co filed Critical Boeing Co
Priority to US478171A priority Critical patent/US3918256A/en
Priority to ZA00747561A priority patent/ZA747561B/xx
Priority to CA214,704A priority patent/CA1038950A/en
Priority to GB5148574A priority patent/GB1469268A/en
Priority to AU75851/74A priority patent/AU488944B2/en
Priority to SE7415123A priority patent/SE403084B/sv
Priority to BR10225/74A priority patent/BR7410225A/pt
Priority to NO744444A priority patent/NO137147C/no
Priority to BE1006330A priority patent/BE823296A/xx
Priority to IT54515/74A priority patent/IT1024432B/it
Priority to FR7441000A priority patent/FR2273708A1/fr
Priority to DE19742459143 priority patent/DE2459143A1/de
Priority to NLAANVRAGE7416387,A priority patent/NL176651C/xx
Priority to ES433062A priority patent/ES433062A1/es
Priority to DK665074A priority patent/DK665074A/da
Priority to JP14663874A priority patent/JPS549798B2/ja
Priority to CH1711974A priority patent/CH591985A5/xx
Application granted granted Critical
Publication of US3918256A publication Critical patent/US3918256A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H11/00—Marine propulsion by water jets
    • B63H11/02—Marine propulsion by water jets the propulsive medium being ambient water
    • B63H11/10—Marine propulsion by water jets the propulsive medium being ambient water having means for deflecting jet or influencing cross-section thereof
    • B63H11/107—Direction control of propulsive fluid
    • B63H11/11—Direction control of propulsive fluid with bucket or clamshell-type reversing means

Definitions

  • the lnvention is characterized in the use of plural potentiom- [52] US. Cl. 60/221; 60/230; 1 14/665 H; eters connected to a single control throttle, one of the 9 l 15/ 14; 239/265.19 potentiometers acting to control the driving engine for [5 Cl. the propulsion apparatus and the other acting to on Fleld of Search 222, tro] the position of the reverser bucket apparatug 114/66-5 151; 115/11, 12 14; Both potentiometers employ shorted sections such 239/265.
  • FIG. 1 A first figure.
  • the present invention is particularly adapted for use in a water jet propulsion system for seacraft, particularly hydrofoil ships.
  • a propulsion system of this type 1
  • water is scooped up from a body of water traversed by the ship, energy is added to the water by means of a pumping element driven by an engine, the water is discharged in the form of a driving jet to propel the ship, and reverser bucket means is provided to selectively and controllably move into the path of travel of the driving jet to reverse the thrust of the ship.
  • the jet is normally discharged above the water line so as to reduce back pressure.
  • a throttle control which, among other things, has a neutral setting which positions the reverser bucket in the jet stream to give a zero net thrust.
  • an engine idle region should be provided which will allow bucket modulation of the jet stream to give forward and reverse boat speed control at the engine idle setting, this being normally for docking and the like purposes.
  • a control of the type described above can be implemented with solidstate electronic systems; however these are complex and excessively costly.
  • control means for the driving engine and reverser bucket means of a water jet ship propulsion system which, instead of using expensive solid-state electronic controls, utilizes special potentiometers with shorted sections, along with a minimum of circuit components to achieve the requirements set out above.
  • first means including an electrically operated valve means for controlling the speed of an engine driving a pumping element of the water jet system, together with second means including electrically operated valve means for controlling movement of the reverser bucket means into the path of travel of the driving jet.
  • the system includes a throttle having neutral, forward and reverse positions together with first and second potentiometers having wiper elements operatively connected to the throttle.
  • the first potentiometer is provided with a shorted central section on either side of the neutral position of the wiper and is connected to the first means for controlling the speed of the engine whereby the engine will idle at the neutral position and at regions on either side of neutral.
  • the wiper element of the second potentiometer is provided with shorted sections on either side of a central, resistive section whereby, as the throttle moves through the regions on either side of neutral where the engine is .idling, the reverser bucket means will move from a fully retracted position for forward thrust to a fully extended position for reverse thrust. Under the circumstances, movement of the reverser bucket with the engine idling modulates the jet stream to give forward and reverse boat speed control at the engine idle setting.
  • FIG. 1 is a perspective aft view of the stern portion of a hydrofoil craft incorporating a water jet propulsion system and with which the control system of the present invention may be used;
  • FIGS. 2, 3 and 4 are side views showing the manner in which the reverser bucket means of the propulsion system may be moved from a fully-retracted position to a fully-extended position wherein the entirety of a jet stream is deflected backwardly;
  • FIG. 5 is a schematic circuit diagram of the control system of the invention.
  • FIG. 6 schematically illustrates the operation of the invention.
  • FIG. 1 there is shown the aft portion of a hydrofoil 10 having downwardly-depending struts 12 and 14 interconnected at their lower ends by means of foils l6 and 18.
  • the foils have control surfaces 20 and 22, respectively, at their trailing edges.
  • a third downwardlydepending strut which acts as a rudder and which carries at its lower end a foil.
  • the struts 12 and 14 and the foils carried thereby can be rotated upwardly into a retracted position about a pivot point 24.
  • the present invention is concerned with the propulsion means for the hydrofoil craft.
  • Propulsion is obtained by means of jet streams of water passing out of nozzles 26 and 28 on either side of the craft.
  • Water is scooped from the sea through an opening 30 at the forward end of a foil section 32 and is then directed upwardly through a center column 34 to port and starboard pumps, not shown, driven by port and starboard prime movers such as jet engines. From the pumps, the water is then discharged through the nozzles 26 and 28 which propel the craft forwardly.
  • reverser bucket devices 36 and 38 are provided for each of the nozzles 26 and 28.
  • the bucket assembles 36 and 38 are rotated into positions where they do not intersect the issuing jet stream. However, by rotating the bucket assemblies 36 and 38 into the jet stream, the jet is deflected backwardly to thereby obtain reverse thrust.
  • the operation of the reverser bucket assemblies is perhaps best shown in FIGS. 2, 3 and 4.
  • the water jet indicated by the reference numeral 40, issues from a nozzle 42 and passes through a cylindrical member 44 which can be tilted upwardly or downwardly to deflect the jet stream.
  • the reverser bucket means itself comprises a dished or curved member 46 pivotally connected to a support member, not shown, by means of side arms 48 which are, in turn, connected through a linkage 50 to the piston of a pneumatic or hydraulic cylinder 52.
  • an opening 54 Provided in one side of the dished portion 46 is an opening 54, the arrangement being such that as the dished portion 46 is moved downwardly by pressurization of cylinder 52, more and more of the dished portion 46 will intersect the jet stream as shown in FIGS. 3 and 4. As it does intersect 3 the jet stream, the water is propelled to the side and backwardly out through the opening 54, thereby creating a reverse thrust for the craft.
  • FIG. 5 The propulsion control system of the invention is shown in FIG. 5 wherein elements corresponding to those of FIGS. 1-4 are indentified by like reference numerals.
  • water is scooped through opening (also identified in FIG. 1) and then passes upwardly through the center column 34 to a pump 56 driven by a prime mover 58, such as a jet engine. From the pump 56, the water is driven through the nozzle 42, thereby creating the jet stream which can be intersected by the dish-shaped reverser member 46 to deflect the stream backwardly.
  • Member 46 is carried on side members 48 connected through the linkage 50 to the piston rod of cylinder 52. It will be understood, of course, that in an actual installation there are two jets and accompanying propulsion means, only one being shown in FIG. 5.
  • Opposite ends of the cylinder 52 are connected through valve to a source 62 of fluid under pressure.
  • the valve 60 is adapted to connect the source of fluid under pressure to either end of the cylinder 52 such that rotation of the dished member 46 can be in either direction, depending upon the position of the valve.
  • the valve 60 is controlled by means of an electrical actuator 64 provided with a control winding 66.
  • the actuator 64 is such that when the voltage at the opposite ends of the winding 66 is the same, then the actuator 64 will stop. However, when the voltage becomes unbalanced, the actuator will turn in one direction or the other to move the valve 60 until the voltages are again equal.
  • Manual control for the craft is by way of a throttle 68 which may be moved in one direction for forward movement of the craft and in the reverse direction for astern movement.
  • the throttle 68 is connected through a mechanical linkage 70 to the wiper elements 72 and 74 of potentiometers 76 and 78, respectively.
  • the potentiometer 76 is included in the throttle circuit 80; while the potentiometer 78 is part of a reverser circuit 82.
  • Both ends of the potentiometer 76 are connected to the positive terminal 84 of a source of direct current voltage, not shown; while opposite ends of the potentiometer 78 are connected to the opposite terminals 84- and 86 of the same source of direct current potential.
  • the potentiometer 76 includes a central shorted section 88 whose center point is connected through a resistor 90 and an idle trimming pot 92 to the terminal 86.
  • On one side of the shorted section 88 of potentiometer 76 is a reverse resistive section 94; and on the other side of the shorted section 88 is a forward resistive section 96, this being shorted by means of resistors 98 and 100 for a purpose which will be hereinafter described.
  • the upper end of the forward resistive section 96 is connected through a forward trim pot 102 to the terminal 84; while the lower end of the reverse resistive section 94 is connected through a reverse trim pot 104 and resistor 106 to the same terminal 84.
  • the resistance of the potentiometer and resistances 90 and 92 make a voltage divider.
  • the throttle 68 in its shorted sector or idle position, current will flow from the wiper element 72 to an electropneumatic valve 108 back to the terminal 86 to establish an idle speed for the prime mover 58 which can be set by resistor 92.
  • the throttle is moved in either the astern or forward direction from its dead center or null position, its idle speed will persist for a period by virtue of the shorted section 88.
  • the wiper element 72 moves beyond the shorted section 88 in either direction, the voltage across the electropneumatic valve 108 will be increased to increase the speed of the prime mover 58 and, hence, the thrust imparted by the water jet 40.
  • the wiper element 74 on potentiometer 78 is also connected to the mechanical linkage 70, the two wiper elements 72 and 74 will move in unison. However, when the wiper element 74 is at the central or idle region. it contacts a resistive section 110 which is bounded on either side by shorted sections 112 and 114. The sections 112 and 114 are connected through trimming pots 116, 118, respectively, to the positive and negative terminals 84 and 86 of the direct current voltage source.
  • a second voltage divider comprising equal resistors and 122 in series with a trimming pot 124.
  • the midpoint between resistors 120 and 122 is adapted to be connected through contacts 126 of relay 128 and resistor 130 to one side of the control winding 66 for the servo device 64.
  • the relay 128 will be deenergized such that the movable tap 74 of potentiometer 78 is connected through resistor 130 to the winding 66.
  • the other side of the winding 66 is connected to a moveable tap 132 on potentiometer 134 connected between the positive and negative terminals 84 and 86.
  • the servo device 84 will move the valve 60 while the tap 132, mechanically connected to the linkage 50, moves in a like amount until the bridge circuit is again balanced and the servo device 64 stops.
  • the system includes a neutral hold feature comprising a manually-operable switch 136 and a switch 138 connected to the throttle 68 and which is closed when the throttle is in its neutral position. Assuming that switches 136 and 138 are closed, relay 128 will become energized and will remain energized until manual switch 136 is opened by virtue of holding contacts 140. At the same time, energization of relay 128 acts to connect the midpoint of resistors 120 and 122 to the control winding 66 such that the position of the servo 64 is maintained at the neutral setting by the position of the tap on pot 124.
  • FIG. 6 shows the throttle travel limits and the relation of the two throttle-coupled potentiometers and their signal output requirements as a function of throttle lever position.
  • Waveform A in FIG. 6 illustrates the signal appearing on the tap 74 of the reve rser potentiometer 78; whereas waveform B represents the signal on the tap 72 of potentiometer 76.
  • the taps 74 and 72 are shown in their neutral positions in FIG. 6.
  • the output signal from the tap shown by waveform B remains constant with the prime mover rotating the pump 56 at a speed of 6,000 revolutions per minute.
  • the resistive section 96 or 94 is contacted whereby the output signal (waveform B) increases.
  • the output signal increases to the point where the engine or prime mover 58 rotates at a speed of 7,600 revolutions per minute; whereas in the forward direction, it advances until the prime mover rotates at a speed of 13,250 revolutions per minute.
  • the shunts 98 and 100 are utilized to linearize the throttle relationship as the tap 72 moves along the resistive section 96.
  • the tap 74 is also moving as explained above.
  • the reverser signal increases from a negative value on the forward side of neutral to a positive valve.
  • the reverser bucket means is moved from a fully retracted position such as that shown in FIG. 2 to a fully extended position such as that shown in FIG. 4 wherein the jet stream is fully deflected for reverse thrust. ln-between the fully-retracted and fully-extended positions, the engine is idling at a speed of 6,000 revolutions per minute; while the position of the bucket can be adjusted to give forward and reverse boat speed control.
  • relay 128 When switch 136 is closed and the throttle 68 is at its neutral position, relay 128 will be energized whereby the position of the reverser bucket will be fixed as determined by the pot 124. Under these circumstances, the throttle can be advanced in either the forward or reverse direction without altering the position of the reverser bucket which allows for engine testing and start-up.
  • first means including electrically operated valve means for controlling the speed of said engine and the amount of energy added to the water by said pumping element;
  • second means including electrically operated valve means for controlling movement of said reverser bucket means into the path of travel of said driving j a throttle having neutral, forward and reverse positions;
  • first potentiometer means having a wiper element operatively connected to said throttle and having a shorted central section on either side of the neutral position of said wiper and connected to the first means for controlling the speed of said engine whereby the engine will idle at the neutral position and in regions on either side of neutral;
  • second potentiometer means having a wiper element operatively connected to said throttle for controlling the position of said reverser bucket means and having shorted sections on either side of a central resistive section whereby, as said throttle moves through said regions on either side of neutral, the reverser bucket means will move from a fully re tracted position for forward thrust to a fully extended position for reverse thrust.
  • the improvement of claim 1 including a source of direct current potential connected to said first and second potentiometer means, means connecting said first means for controlling between the wiper element on said first potentiometer means and one terminal of said direct current voltage source, and means connecting said second means for controlling between the wiper element on said second potentiometer means and a point on a voltage divider connected between the opposite terminals of said direct current voltage source.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
  • Control Of Transmission Device (AREA)
  • Control Of Turbines (AREA)
  • Control Of Eletrric Generators (AREA)
  • Sorption Type Refrigeration Machines (AREA)
US478171A 1974-06-10 1974-06-10 Throttle-reverser control system for water jet propelled seacraft Expired - Lifetime US3918256A (en)

Priority Applications (17)

Application Number Priority Date Filing Date Title
US478171A US3918256A (en) 1974-06-10 1974-06-10 Throttle-reverser control system for water jet propelled seacraft
ZA00747561A ZA747561B (en) 1974-06-10 1974-11-26 Throttle-reverser control system for water jet propelled sea craft
CA214,704A CA1038950A (en) 1974-06-10 1974-11-26 Throttle-reverser control system for water jet propelled seacraft
GB5148574A GB1469268A (en) 1974-06-10 1974-11-27 Throttle-reverser control system for water jet seacraft
AU75851/74A AU488944B2 (en) 1974-06-10 1974-11-28 Throttle-reverser control system for water jet propelled seacraft
SE7415123A SE403084B (sv) 1974-06-10 1974-12-03 Reglersystem for reglering av hastighet och rorelseriktning hos en framdrivningsanordning for ett fartyg med vattenstraledrivning
BR10225/74A BR7410225A (pt) 1974-06-10 1974-12-06 Conjunto de controle inversor de estrangulador para um aparelho de propulsao de embarcacao do tipo a hidrojato
NO744444A NO137147C (no) 1974-06-10 1974-12-10 Regulerings-system.
BE1006330A BE823296A (fr) 1974-06-10 1974-12-12 Systeme de commande d'inversion de l'acceleration pour un navire a ejection d'eau
IT54515/74A IT1024432B (it) 1974-06-10 1974-12-12 Sistema di comando dell invertitore della leva regolatrice del flusso in un battello con propulsione a getto d acqu
FR7441000A FR2273708A1 (fr) 1974-06-10 1974-12-12 Systeme de commande d'inversion de l'acceleration pour un navire a ejection d'eau
DE19742459143 DE2459143A1 (de) 1974-06-10 1974-12-12 Schubumkehrsteuerung fuer wasserfahrzeuge mit wasserstrahlantrieb
NLAANVRAGE7416387,A NL176651C (nl) 1974-06-10 1974-12-16 Regelinrichting voor de waterstraalaandrijving van een schip.
ES433062A ES433062A1 (es) 1974-06-10 1974-12-18 Perfeccionamientos en sistemas de control reguladores-in- versores para aparatos de propulsion de buques.
DK665074A DK665074A (da) 1974-06-10 1974-12-19 Styresystem til et reverseringsspjeld
JP14663874A JPS549798B2 (sv) 1974-06-10 1974-12-20
CH1711974A CH591985A5 (sv) 1974-06-10 1974-12-20

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US478171A US3918256A (en) 1974-06-10 1974-06-10 Throttle-reverser control system for water jet propelled seacraft

Publications (1)

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US3918256A true US3918256A (en) 1975-11-11

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Application Number Title Priority Date Filing Date
US478171A Expired - Lifetime US3918256A (en) 1974-06-10 1974-06-10 Throttle-reverser control system for water jet propelled seacraft

Country Status (16)

Country Link
US (1) US3918256A (sv)
JP (1) JPS549798B2 (sv)
BE (1) BE823296A (sv)
BR (1) BR7410225A (sv)
CA (1) CA1038950A (sv)
CH (1) CH591985A5 (sv)
DE (1) DE2459143A1 (sv)
DK (1) DK665074A (sv)
ES (1) ES433062A1 (sv)
FR (1) FR2273708A1 (sv)
GB (1) GB1469268A (sv)
IT (1) IT1024432B (sv)
NL (1) NL176651C (sv)
NO (1) NO137147C (sv)
SE (1) SE403084B (sv)
ZA (1) ZA747561B (sv)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2751270A1 (de) * 1977-04-07 1978-10-12 Boeing Co Seitensteuerung fuer wasserstrahlantriebe
US5603644A (en) * 1990-10-12 1997-02-18 Yamaha Hatsudoki Kabushiki Kaisha Jet propulsion boat
US5755601A (en) * 1997-03-17 1998-05-26 Brunswick Corporation Brake system for personal watercraft
US5989083A (en) * 1995-04-28 1999-11-23 Ishigaki Company Limited Water jet propulsion device for vessels
US6159059A (en) * 1999-11-01 2000-12-12 Arctic Cat Inc. Controlled thrust steering system for watercraft
US6231410B1 (en) 1999-11-01 2001-05-15 Arctic Cat Inc. Controlled thrust steering system for watercraft
WO2001076938A2 (en) * 2000-04-07 2001-10-18 The Talaria Company, Llc Differential bucket control system for waterjet boats
US6485340B1 (en) 1998-11-16 2002-11-26 Bombardier Motor Corporation Of America Electrically controlled shift and throttle system
US20030019414A1 (en) * 1999-11-09 2003-01-30 Borrett John Robert Waterjet control system
US6663447B1 (en) 1999-12-09 2003-12-16 Arctic Cat Inc. Method and system for controlling thrust of watercraft during various steering conditions
US6709302B2 (en) 2001-02-15 2004-03-23 Yamaha Hatsudoki Kabushiki Kaisha Engine control for watercraft
US6733350B2 (en) 2000-03-17 2004-05-11 Yamaha Hatsudoki Kabushiki Kaisha Engine output control for watercraft
US20050223163A1 (en) * 2004-03-31 2005-10-06 Gemini Mobile Technologies, Inc. Synchronous message queues
US20120021659A1 (en) * 2010-07-22 2012-01-26 Yamaha Hatsudoki Kabushiki Kaisha Marine vessel propulsion device and marine vessel including the same

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3841294A1 (de) * 1988-12-08 1990-06-13 Egon Buhs Wasserstrahlantrieb fuer wasserfahrzeuge
JP2507533Y2 (ja) * 1989-07-18 1996-08-14 川崎重工業株式会社 水中翼船の緊急停止装置
DE9412306U1 (de) * 1994-08-05 1994-11-10 Stein, Ullrich, Dipl.-Ing., 82211 Herrsching Schraubenantrieb für Wasserfahrzeuge
JP2788216B2 (ja) * 1995-12-08 1998-08-20 川崎重工業株式会社 舶用ウオータジェット推進機の操縦装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3342032A (en) * 1966-06-29 1967-09-19 Clifford B Cox Jet propulsion means for a boat
US3662243A (en) * 1970-11-16 1972-05-09 Outboard Marine Corp Electrical circuit for steering and throttle control of a marine propulsion device
US3795105A (en) * 1972-05-02 1974-03-05 Twin Disc Inc Control apparatus for hydraulic jet propulsion water borne craft

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3342032A (en) * 1966-06-29 1967-09-19 Clifford B Cox Jet propulsion means for a boat
US3662243A (en) * 1970-11-16 1972-05-09 Outboard Marine Corp Electrical circuit for steering and throttle control of a marine propulsion device
US3795105A (en) * 1972-05-02 1974-03-05 Twin Disc Inc Control apparatus for hydraulic jet propulsion water borne craft

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2751270A1 (de) * 1977-04-07 1978-10-12 Boeing Co Seitensteuerung fuer wasserstrahlantriebe
US5603644A (en) * 1990-10-12 1997-02-18 Yamaha Hatsudoki Kabushiki Kaisha Jet propulsion boat
US5707264A (en) * 1990-10-12 1998-01-13 Yamaha Hatsudoki Kabushiki Kaisha Jet propulsion boat
US5989083A (en) * 1995-04-28 1999-11-23 Ishigaki Company Limited Water jet propulsion device for vessels
US5755601A (en) * 1997-03-17 1998-05-26 Brunswick Corporation Brake system for personal watercraft
US6485340B1 (en) 1998-11-16 2002-11-26 Bombardier Motor Corporation Of America Electrically controlled shift and throttle system
US6159059A (en) * 1999-11-01 2000-12-12 Arctic Cat Inc. Controlled thrust steering system for watercraft
US6231410B1 (en) 1999-11-01 2001-05-15 Arctic Cat Inc. Controlled thrust steering system for watercraft
US20030019414A1 (en) * 1999-11-09 2003-01-30 Borrett John Robert Waterjet control system
US6865996B2 (en) 1999-11-09 2005-03-15 Cwf Hamilton & Co. Limited Waterjet control system
US6663447B1 (en) 1999-12-09 2003-12-16 Arctic Cat Inc. Method and system for controlling thrust of watercraft during various steering conditions
US6733350B2 (en) 2000-03-17 2004-05-11 Yamaha Hatsudoki Kabushiki Kaisha Engine output control for watercraft
US20040266284A1 (en) * 2000-03-17 2004-12-30 Kazumi Iida Engine output control for watercraft
US6386930B2 (en) 2000-04-07 2002-05-14 The Talaria Company, Llc Differential bucket control system for waterjet boats
WO2001076938A2 (en) * 2000-04-07 2001-10-18 The Talaria Company, Llc Differential bucket control system for waterjet boats
WO2001076938A3 (en) * 2000-04-07 2009-06-11 Talaria Company Llc Differential bucket control system for waterjet boats
US6709302B2 (en) 2001-02-15 2004-03-23 Yamaha Hatsudoki Kabushiki Kaisha Engine control for watercraft
US20050223163A1 (en) * 2004-03-31 2005-10-06 Gemini Mobile Technologies, Inc. Synchronous message queues
US20120021659A1 (en) * 2010-07-22 2012-01-26 Yamaha Hatsudoki Kabushiki Kaisha Marine vessel propulsion device and marine vessel including the same
US8517782B2 (en) * 2010-07-22 2013-08-27 Yamaha Hatsudoki Kabushiki Kaisha Marine vessel propulsion device and marine vessel including the same

Also Published As

Publication number Publication date
IT1024432B (it) 1978-06-20
FR2273708A1 (fr) 1976-01-02
ES433062A1 (es) 1976-11-01
CA1038950A (en) 1978-09-19
GB1469268A (en) 1977-04-06
SE7415123L (sv) 1975-12-11
NO137147B (no) 1977-10-03
DK665074A (da) 1975-12-11
BR7410225A (pt) 1976-06-08
SE403084B (sv) 1978-07-31
NL176651B (nl) 1984-12-17
JPS549798B2 (sv) 1979-04-27
FR2273708B1 (sv) 1980-03-28
NO137147C (no) 1978-01-11
DE2459143C2 (sv) 1988-10-06
DE2459143A1 (de) 1975-12-18
CH591985A5 (sv) 1977-10-14
NL7416387A (nl) 1975-12-12
ZA747561B (en) 1975-12-31
NO744444L (sv) 1975-12-11
NL176651C (nl) 1985-05-17
BE823296A (fr) 1975-06-12
AU7585174A (en) 1976-06-03
JPS50159093A (sv) 1975-12-23

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