EP1472135B1 - An arrangement for steering a water-craft - Google Patents

An arrangement for steering a water-craft Download PDF

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Publication number
EP1472135B1
EP1472135B1 EP03737336A EP03737336A EP1472135B1 EP 1472135 B1 EP1472135 B1 EP 1472135B1 EP 03737336 A EP03737336 A EP 03737336A EP 03737336 A EP03737336 A EP 03737336A EP 1472135 B1 EP1472135 B1 EP 1472135B1
Authority
EP
European Patent Office
Prior art keywords
water
steering
craft
propulsion devices
main
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.)
Revoked
Application number
EP03737336A
Other languages
German (de)
French (fr)
Other versions
EP1472135A1 (en
Inventor
Jari SIRVIÖ
Olli Salmela
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.)
Meyer Turku Oy
Original Assignee
Aker Finnyards OY
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
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Application filed by Aker Finnyards OY filed Critical Aker Finnyards OY
Publication of EP1472135A1 publication Critical patent/EP1472135A1/en
Application granted granted Critical
Publication of EP1472135B1 publication Critical patent/EP1472135B1/en
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
    • B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
    • B63H5/08—Arrangements on vessels of propulsion elements directly acting on water of propellers of more than one propeller
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H25/00—Steering; Slowing-down otherwise than by use of propulsive elements; Dynamic anchoring, i.e. positioning vessels by means of main or auxiliary propulsive elements
    • B63H25/42—Steering or dynamic anchoring by propulsive elements; Steering or dynamic anchoring by propellers used therefor only; Steering or dynamic anchoring by rudders carrying propellers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
    • B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
    • B63H5/125—Arrangements on vessels of propulsion elements directly acting on water of propellers movably mounted with respect to hull, e.g. adjustable in direction, e.g. podded azimuthing thrusters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
    • B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
    • B63H5/125—Arrangements on vessels of propulsion elements directly acting on water of propellers movably mounted with respect to hull, e.g. adjustable in direction, e.g. podded azimuthing thrusters
    • B63H2005/1254—Podded azimuthing thrusters, i.e. podded thruster units arranged inboard for rotation about vertical axis

Definitions

  • the invention relates to an arrangement for steering a water-craft, which comprises at least one main propulsion device, which is arranged to push the water-craft forward or backward, and a number of steering propulsion devices, the pushing direction of which can be changed, in accordance with the preamble of claim 1.
  • Water-crafts or vessels mean here all kinds of marine vessels, like for example cruisers, passenger ships, ice breakers and different cargo ships. Arrangements are already known, in which a water-craft is provided with two mechanically connected propellers with rudders behind them, two or three separate pod-propulsion devices or a propeller, behind which there is a contra-rotating propeller in a pod-propulsion device. The last mentioned has been disclosed in a WO-publication 01/54971, in which the pod-propulsion unit has been indicated by the reference numeral 4 and the propeller by numeral 3.
  • the mechanical propeller arrangement has long shaft lines and shaft supports outside the hull of water-craft, which lead to a non-uniform wake field.
  • Steerable rudder-propeller devices or pod-propulsion devices have become more general in water-crafts. Since these devices are turnable, their thrust force can be utilized for steering of the water-craft.
  • a disadvantage with an electric arrangement of two or more pod-propulsion devices are the high costs, because efficient pod-propulsion devices require engine-driven generators together with their power control systems. These are expensive, heavy and large. For instance in RoRo vessels handling of cargo becomes more difficult because of the engine rooms and gaps required by the machinery, since these are partly located above the cargo deck. This means that several disadvantageous narrow parts are formed in the cargo space, whereby the rear end of the cargo space remains narrow. The heavy electric machinery leads further to a disadvantageous location of the displacement's centre of gravity in the longitudinal direction.
  • An object of the present invention is to eliminate the drawbacks of the prior art and to provide a novel solution advantageous as to its costs and enabling, where applicable, better utilization of the cargo space of the water-craft
  • the aims of the invention can be achieved by an arrangement for steering a water-craft as is disclosed in claim 1.
  • the invention is based on the use of turnable steering propulsion devices in a water-craft so that they alone provide steering and additionally they participate in moving the water-craft forward.
  • a major part of the forward or backward propulsion is generated by a separate thrust device e.g. a large propulsion unit or large propulsion units.
  • An important advantage of the solution according to the invention is the fact that the upper end of the pod-propulsion devices fits below the cargo deck. Since the fully electric machinery of conventional large pod-propulsion devices is heavier and larger than the machinery to be utilized according to the invention, the invention allows for increased cargo capacity and handling of cargo becomes more efficient and easier. Furthermore, the solution is more economic and easier to put technically into practice than the known solutions.
  • the cargo deck can be lowered, the dimensions of the water-craft can be more economic and, compared with one centre propulsion device, two propulsion devices provide better reliability, which is important especially for the manoeuvrability of a passenger ship. Further, when separate main propulsion devices and steering propulsion devices are provided no supplementary output is used unnecessarily in manoeuvring.
  • the steering propulsion devices there is an even number of the steering propulsion devices and the propeller part of the steering propulsion devices is stationarily located outside of the hull of the water-craft.
  • the water-craft's at least one main propulsion device is located essentially in the aft centre part of the water-craft and the steering propulsion devices are positioned to the sides of the propulsion device being thus located in the lateral parts of the water-craft near the sideboards thereof.
  • a high efficiency is obtained when the main propulsion device is placed as far as possible in the water-craft's aft and no protruding parts increasing the resistance are needed in the rear side of the main propulsion device. Since no shaft bearings are needed, a uniform wake is created.
  • the steering propulsion devices provide an excellent manoeuvrability even in rough weather conditions, also at low speeds for instance less than 5 knots.
  • the output of the steering propulsion devices need not be high.
  • the output required by the steering propulsion devices is less than 50% of the common shaft output of the main propulsion device and of the steering propulsion device.
  • Shaft output means here the usual output obtained from the devices at maximum i.e. the nominal output taken by the main propulsion device and the steering propulsion device, which can be measured from the outlet shaft of the device.
  • the propulsion device itself is connected by means of a horizontal or almost horizontal shaft or shafts to a prime mover that may comprise one or more diesel engines and/or electric engines and/or gas turbines.
  • the steering propulsion devices are installed on both sides of the one or more main propulsion devices substantially near the outboard of the water-craft, they can be relatively small and can thus be installed under the cargo space of the water-craft. By doing so, a space can be formed under the cargo space for the maintenance and inspection of the steering propulsion devices.
  • the arrangement is formed by a water-craft or a vessel 1 together with steering propulsion devices 2 and a main propulsion device 3.
  • the steering propulsion devices even in number, have been placed quite close to the outboard 6 of the vessel.
  • Diesel engines indicated by the reference numeral 4, serve as prime mover for the main propulsion device, the output of which is transferred to the main propulsion device by means of a shaft 5.
  • the steering propulsion devices in the solution according to the invention need not be large, they do not require much space and the maintenance space 8 they need, in which maintenance staff 7 may go for checking, and when required, repairing the steering propulsion devices, is situated advantageously below the cargo space 10. In this way the whole cargo space can be put into use and there are no previously needed narrowing parts, but the whole area can be utilized at maximum e.g. by loading onboard trucks and other cargo on wheels 9.
  • the upper view shows a main propulsion device 3 and a steering propulsion device 2. Furthermore, a couple of examples of a steering propulsion device is shown in different positions 2a and 2b. When the steering propulsion device is in position 2b, turning of the vessel into a desired direction is provided. If there is a need for boosting the turning, also the other steering propulsion device 2 is turned, respectively, into position 2b simultaneously with the previous one. In Figure 2B, one main propulsion device 3 has been replaced by two separate main propulsion devices 3a and 3b.
  • FIG 3A in addition to the steering propulsion devices 2, there is provided an alternative solution to the traditional propeller and in this view a water-jet device 11 is used as a main propulsion device.
  • the Figure 3B view is a supplementary variation of the Figure 3A, in which there are more than one water-jets, in this solution three water-jets 11a, 11b and 11c.
  • two water-jets 11a and 11c can be installed.
  • solutions also differing from the above described are feasible.
  • the solution can be applied to all kinds of water-crafts. For example, in war ships and cruisers the solution makes possible a diversified driving profile.
  • the main mover of the steering propulsion devices can also be placed above the cargo deck e.g. around the smoke stack, in which case supplying of electricity also to other parts of the vessel is easy. In cruisers, this makes possible flexible distribution of electric power between the hotel load and the propulsion devices.

Landscapes

  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Steering-Linkage Mechanisms And Four-Wheel Steering (AREA)
  • Steering Controls (AREA)
  • Toys (AREA)
  • Steering Devices For Bicycles And Motorcycles (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
  • Gear Transmission (AREA)
  • Steering Control In Accordance With Driving Conditions (AREA)
  • Automatic Assembly (AREA)
  • Control Of Position, Course, Altitude, Or Attitude Of Moving Bodies (AREA)
  • Prevention Of Electric Corrosion (AREA)
  • Cookers (AREA)
  • Switches With Compound Operations (AREA)

Abstract

The invention relates to an arrangement for steering a water-craft, which comprises at least one main propulsion device which is arranged to push the water-craft forward or backward, and a number of steering propulsion devices, the pushing direction of which can be changed. The steering propulsion devices are arranged in the aft of the water-craft on both sides of the said at least one main propulsion device so that the steering of the water-craft is continuously provided by means of the steering propulsion devices without any separate rudder means or the like to be functionally connected to said at least one main propulsion device.

Description

The invention relates to an arrangement for steering a water-craft, which comprises at least one main propulsion device, which is arranged to push the water-craft forward or backward, and a number of steering propulsion devices, the pushing direction of which can be changed, in accordance with the preamble of claim 1.
Water-crafts or vessels mean here all kinds of marine vessels, like for example cruisers, passenger ships, ice breakers and different cargo ships. Arrangements are already known, in which a water-craft is provided with two mechanically connected propellers with rudders behind them, two or three separate pod-propulsion devices or a propeller, behind which there is a contra-rotating propeller in a pod-propulsion device. The last mentioned has been disclosed in a WO-publication 01/54971, in which the pod-propulsion unit has been indicated by the reference numeral 4 and the propeller by numeral 3.
The prior art solutions include substantial disadvantages. Firstly, the mechanical propeller arrangement has long shaft lines and shaft supports outside the hull of water-craft, which lead to a non-uniform wake field.
Steerable rudder-propeller devices or pod-propulsion devices have become more general in water-crafts. Since these devices are turnable, their thrust force can be utilized for steering of the water-craft.
A disadvantage with an electric arrangement of two or more pod-propulsion devices are the high costs, because efficient pod-propulsion devices require engine-driven generators together with their power control systems. These are expensive, heavy and large. For instance in RoRo vessels handling of cargo becomes more difficult because of the engine rooms and gaps required by the machinery, since these are partly located above the cargo deck. This means that several disadvantageous narrow parts are formed in the cargo space, whereby the rear end of the cargo space remains narrow. The heavy electric machinery leads further to a disadvantageous location of the displacement's centre of gravity in the longitudinal direction.
In the contra-rotating pod/propeller-combination there is only one steering device, which is often considered as a disadvantage from the viewpoint of reliability.
An object of the present invention is to eliminate the drawbacks of the prior art and to provide a novel solution advantageous as to its costs and enabling, where applicable, better utilization of the cargo space of the water-craft
The aims of the invention can be achieved by an arrangement for steering a water-craft as is disclosed in claim 1.
The invention is based on the use of turnable steering propulsion devices in a water-craft so that they alone provide steering and additionally they participate in moving the water-craft forward. A major part of the forward or backward propulsion is generated by a separate thrust device e.g. a large propulsion unit or large propulsion units. An important advantage of the solution according to the invention is the fact that the upper end of the pod-propulsion devices fits below the cargo deck. Since the fully electric machinery of conventional large pod-propulsion devices is heavier and larger than the machinery to be utilized according to the invention, the invention allows for increased cargo capacity and handling of cargo becomes more efficient and easier. Furthermore, the solution is more economic and easier to put technically into practice than the known solutions. The cargo deck can be lowered, the dimensions of the water-craft can be more economic and, compared with one centre propulsion device, two propulsion devices provide better reliability, which is important especially for the manoeuvrability of a passenger ship. Further, when separate main propulsion devices and steering propulsion devices are provided no supplementary output is used unnecessarily in manoeuvring.
According to the invention there is an even number of the steering propulsion devices and the propeller part of the steering propulsion devices is stationarily located outside of the hull of the water-craft. There is one or more main propulsion devices and for instance a propeller or a water-jet device may function as the main propulsion device.
The water-craft's at least one main propulsion device is located essentially in the aft centre part of the water-craft and the steering propulsion devices are positioned to the sides of the propulsion device being thus located in the lateral parts of the water-craft near the sideboards thereof. A high efficiency is obtained when the main propulsion device is placed as far as possible in the water-craft's aft and no protruding parts increasing the resistance are needed in the rear side of the main propulsion device. Since no shaft bearings are needed, a uniform wake is created. The steering propulsion devices provide an excellent manoeuvrability even in rough weather conditions, also at low speeds for instance less than 5 knots.
According to the invention, the output of the steering propulsion devices need not be high. The output required by the steering propulsion devices is less than 50% of the common shaft output of the main propulsion device and of the steering propulsion device. Shaft output means here the usual output obtained from the devices at maximum i.e. the nominal output taken by the main propulsion device and the steering propulsion device, which can be measured from the outlet shaft of the device. The propulsion device itself is connected by means of a horizontal or almost horizontal shaft or shafts to a prime mover that may comprise one or more diesel engines and/or electric engines and/or gas turbines.
Further, since the steering propulsion devices are installed on both sides of the one or more main propulsion devices substantially near the outboard of the water-craft, they can be relatively small and can thus be installed under the cargo space of the water-craft. By doing so, a space can be formed under the cargo space for the maintenance and inspection of the steering propulsion devices.
Also other alternative solutions are conceivable, in which there can be in the middle one or more water-jet devices as a main propulsion device e.g. if the speed of the water-craft is high. Also in this case, the steering propulsion devices are at the side and a major part of the power used for moving forward is provided by the main propulsion device.
In the following the invention is described by way of example only with reference to the accompanying drawings, in which
  • Figures 1A and 1B show a water-craft provided with an arrangement according to the invention as a side view and viewed from below,
  • Figures 2A and 2B show alternative solutions relating to main propulsion devices and steering propulsion devices, and
  • Figures 3A and 3B show further alternative solutions relating to main propulsion devices and steering devices.
According to Figures 1A and 1B, the arrangement is formed by a water-craft or a vessel 1 together with steering propulsion devices 2 and a main propulsion device 3. In this solution, the steering propulsion devices, even in number, have been placed quite close to the outboard 6 of the vessel. Diesel engines, indicated by the reference numeral 4, serve as prime mover for the main propulsion device, the output of which is transferred to the main propulsion device by means of a shaft 5. As the steering propulsion devices in the solution according to the invention need not be large, they do not require much space and the maintenance space 8 they need, in which maintenance staff 7 may go for checking, and when required, repairing the steering propulsion devices, is situated advantageously below the cargo space 10. In this way the whole cargo space can be put into use and there are no previously needed narrowing parts, but the whole area can be utilized at maximum e.g. by loading onboard trucks and other cargo on wheels 9.
In Figure 2A, the upper view shows a main propulsion device 3 and a steering propulsion device 2. Furthermore, a couple of examples of a steering propulsion device is shown in different positions 2a and 2b. When the steering propulsion device is in position 2b, turning of the vessel into a desired direction is provided. If there is a need for boosting the turning, also the other steering propulsion device 2 is turned, respectively, into position 2b simultaneously with the previous one. In Figure 2B, one main propulsion device 3 has been replaced by two separate main propulsion devices 3a and 3b.
In Figure 3A, in addition to the steering propulsion devices 2, there is provided an alternative solution to the traditional propeller and in this view a water-jet device 11 is used as a main propulsion device. The Figure 3B view is a supplementary variation of the Figure 3A, in which there are more than one water-jets, in this solution three water- jets 11a, 11b and 11c. Advantageously, also two water- jets 11a and 11c can be installed.
Within the scope of invention, solutions also differing from the above described are feasible. The solution can be applied to all kinds of water-crafts. For example, in war ships and cruisers the solution makes possible a diversified driving profile. The main mover of the steering propulsion devices can also be placed above the cargo deck e.g. around the smoke stack, in which case supplying of electricity also to other parts of the vessel is easy. In cruisers, this makes possible flexible distribution of electric power between the hotel load and the propulsion devices.
It is clear to the one skilled in the art that the invention is not restricted to the embodiments described above, but different applications thereof are feasible within the inventive idea defined by the ensuing claims.

Claims (7)

  1. An arrangement for steering a water-craft (1), which comprises at least one main propulsion device (3, 3a, 3b, 11, 11a, 11b, 11c), which is arranged to push the water-craft (1) forward or backward, and a number of steering propulsion devices (2), the pushing direction of which can be changed, characterized in that the steering propulsion devices (2) are arranged in the aft of the water craft (1) on both sides of the said at least one main propulsion device (3, 3a, 3b, 11, 11a, 11b, 11c) so that the steering of the water-craft (1) is continuous!y provided by means of the steering propulsion devices (2) without any separate rudder means of the like to be functionally connected to said at least one main propulsion device (3, 3a, 3b, 11, 11a, 11b, 11c) and in that the output required by the steering propulsion devices (2) is in all less than 50% of the common shaft output of the said at least one main propu!sion device (3, 3a, 3b, 11, 11a, 11b, 11c) and of the steering propulsion devices (2).
  2. An arrangement according to claim 1, characterized in that there is an even number of the steering propulsion devices (2) and the propeller part of the steering propulsion devices (2) is stationarily located outside of the hull of the water-craft (1).
  3. An arrangement according to claim 1 or 2, characterized in that a propeller (3, 3a, 3b) or a water-jet device (11, 11 a, 11b, 11c) functions as the main propulsion device.
  4. An arrangement according to any of the preceding claims, characterized in that the at least one main propulsion device (3, 3a, 3b, 11, 11a, 11b, 11c) of the water-craft (1) is located essentially in the aft centre part of the water-craft (1) and the steering propulsion devices (2) are located essentially in the lateral parts of the aft of the water-craft (1).
  5. An arrangement according to any of the preceding claims, characterized in that said at least one main propulsion device (3, 3a, 3b) is connected by means of a shaft (5) to a prime mover (4), which prime mover (4) can be e.g. one or more diesel and/or electric engines and/or gas turbines.
  6. An arrangement according to any of the preceding claims, characterized in that the steering propulsion devices (2) are arranged to be installed under the cargo space (10) of the water-craft (1).
  7. An arrangement according to claim 7, characterized that the steering propulsion devices (2) are arranged to be installed to the water-craft (1) so that a space (8) is formed under the cargo space (10) for the maintenance of the steering propulsion devices (2).
EP03737336A 2002-02-06 2003-01-10 An arrangement for steering a water-craft Revoked EP1472135B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FI20020243A FI113753B (en) 2002-02-06 2002-02-06 Device, method and installation method in a watercraft
FI20020243 2002-02-06
PCT/FI2003/000018 WO2003066428A1 (en) 2002-02-06 2003-01-10 An arrangement for steering a water-craft

Publications (2)

Publication Number Publication Date
EP1472135A1 EP1472135A1 (en) 2004-11-03
EP1472135B1 true EP1472135B1 (en) 2005-11-02

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ID=8563104

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Application Number Title Priority Date Filing Date
EP03737336A Revoked EP1472135B1 (en) 2002-02-06 2003-01-10 An arrangement for steering a water-craft

Country Status (14)

Country Link
US (1) US20050070179A1 (en)
EP (1) EP1472135B1 (en)
JP (1) JP4206339B2 (en)
KR (1) KR20040074993A (en)
CN (1) CN100509553C (en)
AT (1) ATE308456T1 (en)
AU (1) AU2003201176A1 (en)
DE (1) DE60302136T2 (en)
DK (1) DK1472135T3 (en)
ES (1) ES2250898T3 (en)
FI (1) FI113753B (en)
NO (1) NO20043731L (en)
PL (1) PL373582A1 (en)
WO (1) WO2003066428A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101730644B (en) * 2007-07-06 2014-03-05 阿克北极科技公司 Method for improving ice-breaking properties of water craft and water craft constructed according to method
RU2735392C1 (en) * 2020-04-15 2020-10-30 Федеральное государственное унитарное предприятие «Росморпорт» (ФГУП Росморпорт») Ice breaker

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Publication number Priority date Publication date Assignee Title
FI117194B (en) * 2005-02-15 2006-07-31 Waertsilae Finland Oy sea ship
FR2902403B1 (en) * 2006-06-20 2008-09-19 Aker Yards Sa SHIP ELECTRICAL PROPULSION SYSTEM AND SHIP THUS EQUIPPED
WO2013119175A1 (en) 2012-02-07 2013-08-15 Rolls-Royce Ab A propulsor arrangement for a marine vessel and a marine vessel constructed with this type of propulsor arrangement
JP6290533B2 (en) * 2012-12-10 2018-03-07 三菱重工業株式会社 Marine propulsion system and operation method thereof
CN104149965A (en) * 2014-08-19 2014-11-19 刘书雄 Power plant for small ship
JP6618869B2 (en) * 2016-08-19 2019-12-11 ジャパンマリンユナイテッド株式会社 Ship propulsion system
JP6618868B2 (en) * 2016-08-19 2019-12-11 ジャパンマリンユナイテッド株式会社 Ship propulsion system
EP3501965A1 (en) 2017-12-22 2019-06-26 Meyer Turku Oy Marine vessel
JP7326172B2 (en) * 2020-01-17 2023-08-15 三菱重工業株式会社 vessel
CN116729611A (en) * 2023-05-24 2023-09-12 中国船舶集团有限公司第七○八研究所 Hybrid power and propulsion system of icebreaker

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Publication number Priority date Publication date Assignee Title
US2524184A (en) * 1948-08-03 1950-10-03 Wiggins Earl Side steering propeller
US3483838A (en) * 1968-02-23 1969-12-16 Eric Rath Non-broaching beach cargo ship
FI951261L (en) * 1995-03-17 1996-09-18 Aquamaster Rauma Oy Automatic steering system on a vessel equipped with tilting propellers
JPH09142391A (en) 1995-11-22 1997-06-03 Mitsubishi Heavy Ind Ltd Ship with turning propeller
US6790109B1 (en) * 1999-05-11 2004-09-14 Siemens Aktiengesellschaft Electric rudder propeller of lower installation height

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101730644B (en) * 2007-07-06 2014-03-05 阿克北极科技公司 Method for improving ice-breaking properties of water craft and water craft constructed according to method
US8689713B2 (en) 2007-07-06 2014-04-08 Aker Arctic Technology Inc. Method for improving the ice-breaking properties of a water craft and a water craft constructed according to the method
RU2735392C1 (en) * 2020-04-15 2020-10-30 Федеральное государственное унитарное предприятие «Росморпорт» (ФГУП Росморпорт») Ice breaker

Also Published As

Publication number Publication date
WO2003066428A1 (en) 2003-08-14
DE60302136D1 (en) 2005-12-08
KR20040074993A (en) 2004-08-26
FI20020243A7 (en) 2003-08-07
FI113753B (en) 2004-06-15
DK1472135T3 (en) 2006-03-20
FI20020243A0 (en) 2002-02-06
JP2005516844A (en) 2005-06-09
US20050070179A1 (en) 2005-03-31
EP1472135A1 (en) 2004-11-03
ATE308456T1 (en) 2005-11-15
NO20043731L (en) 2004-09-06
PL373582A1 (en) 2005-09-05
CN100509553C (en) 2009-07-08
CN1628052A (en) 2005-06-15
ES2250898T3 (en) 2006-04-16
DE60302136T2 (en) 2006-07-20
JP4206339B2 (en) 2009-01-07
AU2003201176A1 (en) 2003-09-02

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