EP1578662B1 - Arrangement in a propulsion system - Google Patents

Arrangement in a propulsion system Download PDF

Info

Publication number
EP1578662B1
EP1578662B1 EP03767842A EP03767842A EP1578662B1 EP 1578662 B1 EP1578662 B1 EP 1578662B1 EP 03767842 A EP03767842 A EP 03767842A EP 03767842 A EP03767842 A EP 03767842A EP 1578662 B1 EP1578662 B1 EP 1578662B1
Authority
EP
European Patent Office
Prior art keywords
propeller
propulsion system
cap
counter rotating
aft
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
EP03767842A
Other languages
German (de)
French (fr)
Other versions
EP1578662A1 (en
Inventor
Tomi Veikonheimo
Vladimir Alexandrovich Boushkovskiy
Alexander Vladimirovich Pustoshny
Sergey Viacheslavovich Kaprantzev
Irina Gennadievna Frolova
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.)
ABB Oy
Original Assignee
ABB 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
Application filed by ABB Oy filed Critical ABB Oy
Publication of EP1578662A1 publication Critical patent/EP1578662A1/en
Application granted granted Critical
Publication of EP1578662B1 publication Critical patent/EP1578662B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B63H5/10—Arrangements on vessels of propulsion elements directly acting on water of propellers of more than one propeller of coaxial type, e.g. of counter-rotative type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H1/00—Propulsive elements directly acting on water
    • B63H1/02—Propulsive elements directly acting on water of rotary type
    • B63H1/12—Propulsive elements directly acting on water of rotary type with rotation axis substantially in propulsive direction
    • B63H1/14—Propellers
    • B63H1/28—Other means for improving propeller efficiency

Definitions

  • This application relates to a counter rotating propulsion system (CRP).
  • the propulsion system is normally located in after part of the marine vessel.
  • the propellers are equipped with hubcap, which is normally covering the propeller fastening bolt.
  • the circulation of water around each forward propeller blade forms a vortex near the hub before they joint to one hub vortex.
  • This hub vortex cavitation is know to be very harmful to the propulsion unit or the rudder behind the main propeller.
  • the hub vortex is itself erosive but it can also induce other harmful forms of cavitation on construction such as propulsion unit or after propeller blade.
  • WO 01 54971 A1 discloses a CRP arrangement where two propellers are propellers are arranged on the same axial line.
  • the aft propeller and the forward propeller have opposite directions of rotating and the aft and forward propellers are arranged opposite to each other.
  • the aft propeller of WO 01 54971 A1 is installed in the pod that can be turned around a vertical axis to steer the ship.
  • EP 0255136 A1 discloses a propulsion system where the cap of the propeller has fins in order to decrease the cavitations of a single propeller.
  • the aim of EP 0255136 is to increase the efficiency of the propulsion arrangement with single propeller.
  • Publication EP 0758606 A1 discloses another single propeller system having fins on the cap of the propeller.
  • Publication DE 606119 C discloses a single propeller with a cylinder or a round body whereto fins are attached.
  • This invention will reduce or eliminate the above mentioned problem in CRP propulsion concept and thus protect the after propeller and entire propulsion unit itself from damage.
  • the invention will increase the capability to steer the propulsion unit behind forward propeller without danger of erosive hub vortex cavitation and without dangerous cavitation on the blades after hub of forward cavitation. This will lead to longer lifetime and reduce repairing costs of the propulsion unit.
  • the invention is based to an idea to break the flow of the vortex caused by the blades of the forward propeller.
  • the hub cab of the propeller in detail the external appearance of the hubcap is formed so that it consists of at least two, equally distributed flow plates projecting from the outer surface of the hubcap.
  • the number of the flow plates is in practice not higher than eight while four flow plates gives the most efficient result.
  • cap itself should be well-streamlined, with relation of cap diameter and cap length not more than 2. It provides the absence of developed separation after hub cap with plates and so make it possible to eliminate blade cavitation in separation zone after fore hub when thruster is not co-axial with fore propeller.
  • the absence of the hub vortex allows the safe operation of after propeller and steerable propulsion unit.
  • the invention is advantageous to implement, as it requires no other modifications to the structure or to operation of the propulsion system or its peripheral devices. Further as the invention mainly is realized with a special forming of a separate component, the invention is adaptable also to the propulsion devices in use.
  • the hubcap of the fore propeller will have the flow plates which are straight and similar to each other. This gives an optimal effect and a balanced structure.
  • the number of the flow plates is independent of the number of the blades of the forward propeller and the position of the flow plates is independent of the position of the blades of the forward propeller.
  • the diameter of the tip edges of the plates is in the range of 0,4 -2 times the maximum hub diameter. Within this range the efficiency of the invented appliance is especially advantageous.
  • the flow plates are fastened to the hub cab either by fixed to the cap by welding or by with bolts.
  • the size and shape of the flow plates is easy to change and vary if necessary depending of the respective requirements. If the flow plates are used with the vessels in use, this possibility might be desirable.
  • the hubcap is moulded as one piece with flow plates whereby the hubcap can be handled as an integrated piece.
  • the aft propeller is turnable and the aft propeller is used to propel and steer the vessel.
  • FIG. 1 shows a propulsion arrangement 2 which is realized with counter rotating propellers (CRP), which is placed under the hull 4 of the vessel.
  • the main propulsion propeller, so called forward propeller 6 is arranged onto the main driving axis 8, which is supported via bearings to the hull 4 of the ship.
  • the forward propeller 6 is driven e.g. by the drive unit, like a diesel engine, directly or via a electric drive that is supplied by a diesel-generator unit by means of a frequency converter which is well-known in the art.
  • the drive unit and the bearing and other features of the power transmission is utilizing conventional technique well-known in the art and there in no need to explain in detail in order to understand the invention.
  • the forward propeller 6 comprises a hub 10 arranged to the driving axis 8 and propeller blades 12 fixed to the hub 10.
  • the number of blades, the inclination of the blades and the size of the blades will be defined when dimensioning the propulsion system of ship and they may vary case by case.
  • the inclination of the blades may also be adjustable.
  • the hull 4 of the ship is designed so that the bottom of the hull curves over the forward propeller 8 and the bottom extends at higher level after the forward propeller.
  • the bottom 14 at the rearmost portion of the ship is higher than the bottom 16 of the ship in front of the forward propeller.
  • a turnable steering device 18 which consists of an azimuth propeller unit, like an AZIPODĀ® unit, which steers and propels the vessel.
  • the steering device 18 comprises a shaft 20, which is pillowed to be turnable 360 degrees around its vertical axis.
  • a streamlined casing 21, which covers the driving motor of the steering propeller 22, is attached under the shaft 20.
  • the steering propeller 22 is driven by the driving axis 24, which is positioned on the same level as the axis 8 of the forward propeller.
  • the well-streamlined hub cap 30 of the forward propeller 6 and the hub cap 26 of the steering propeller 22 are against each other and the forward propeller 6 and the steering propeller 22 are rotating in the opposite direction when the ship is moving forwards.
  • the steering device 18 is turned around the vertical axis of the shaft 20 in order to effect the desired steering action.
  • the rotating planes of the forward and steering propellers are farther from each other than the double diameter of the forward propeller when the propellers are against each other.
  • the hub cap 30 of the forward propeller 6 and the hub cap 26 of the steering propeller are thus positioned much closer.
  • the vortex and the stress caused by it effects thus heavily to the hubcap of the forward propeller and also to the steering propeller.
  • the hub vortex cavitation and the aft propeller blade cavitation with its harmful effects are minimized by arranging a well-streamlined hub 30 after the forward propeller and flow plates 28 onto the hubcap 30.
  • each flow plate 28 is mounted symmetrically or with equal distance to each flow plate on the outer surface of the hubcap 30 as shown in the figures 2a and 2b .
  • the figure 2a is the side view and the figure 2b is the front view when seen from the rear of the vessel.
  • the hubcap has length L and diameter D, whereby the ratio D/L is not higher than 2.
  • the flow plates are straight plates that are welded or fixed by bolts to the surface of the main propeller hubcap 2.
  • the flow plates 2 can also be cast together with the whole propeller hubcap.
  • the flow plate has been installed on the whole length of the cap surface and the flow plates link up to each other outside the cap surface extending a little over the top edge of the cap.
  • the height of the flow plate does not exceed the radial dimensions of the cap.
  • the flow plate does not extend over the diameter of the hubcap.
  • the flow plates are projected in the radial direction from the surface of the hubcap and they are installed in the direction of the propeller axis with no inclination. It has been shown that the tip edges of the flow plates may vary in the range of 0,4 to 2 times the maximum hub diameter D. Accordingly this range corresponds about 0,12 to 0,4 times the diameter of the propeller.
  • the number of the flow plates is not tied to the number of the propeller blades and it may vary from two to eight while four flow plates has been found to be advantageous. Neither the positioning of the flow plates is not bound to the position of the propeller blades but they can coincide or be aside.

Abstract

In a counter rotating propulsion system (CRP), whereby the aft propeller ( 22 ) and the forward propeller ( 6 ) have opposite directions of rotating and the aft and forward propellers are arranged against each other, the forward propeller is provided with a hubcap ( 30 ), wherein at least two equally distributed flow plates ( 28 ) are arranged on the cap ( 30 ) and the flow plates ( 28 ) are radially projecting from the cap ( 30 ).

Description

  • This application relates to a counter rotating propulsion system (CRP).
  • The propulsion system is normally located in after part of the marine vessel. The propellers are equipped with hubcap, which is normally covering the propeller fastening bolt. The circulation of water around each forward propeller blade forms a vortex near the hub before they joint to one hub vortex. This hub vortex cavitation is know to be very harmful to the propulsion unit or the rudder behind the main propeller. The hub vortex is itself erosive but it can also induce other harmful forms of cavitation on construction such as propulsion unit or after propeller blade.
  • Especially in the CRP propulsion concept whereby another propeller is arranged close to the main propeller this may cause extensive damages. The steering of the propulsion unit is not fully competent because of erosive hub vortices. This will shorten the maintenance interval of the propulsion system and thereby the overall costs increase.
  • Conventional way to avoid hub vortex cavitation is application of blunt cap after the propeller, which destroy hub vortex due to vast separation after hubcap. But in subject case of counter rotating propeller such way is unacceptable because separation provoke cavitation on the blades of aft propeller especially when aft thruster operates in steering mode so that thruster is turned by some angle, and so fore and aft propellers are not co-axial and blades of aft propeller during its rotation cross the separation zone.
  • Publication WO 01 54971 A1 (closest prior art) discloses a CRP arrangement where two propellers are propellers are arranged on the same axial line. The aft propeller and the forward propeller have opposite directions of rotating and the aft and forward propellers are arranged opposite to each other. The aft propeller of WO 01 54971 A1 is installed in the pod that can be turned around a vertical axis to steer the ship.
  • Publication EP 0255136 A1 discloses a propulsion system where the cap of the propeller has fins in order to decrease the cavitations of a single propeller. The aim of EP 0255136 is to increase the efficiency of the propulsion arrangement with single propeller.
  • Publication EP 0758606 A1 discloses another single propeller system having fins on the cap of the propeller. Publication DE 606119 C discloses a single propeller with a cylinder or a round body whereto fins are attached.
  • Accordingly, it is an object of the present invention to provide a new arrangement, which solves the problems caused by the vortices. This object is achieved in connection of the CRP system by the features as identified in the claim 1. Further advantageous modifications of the invention are characterized by the features of the subclaims.
  • This invention will reduce or eliminate the above mentioned problem in CRP propulsion concept and thus protect the after propeller and entire propulsion unit itself from damage. The invention will increase the capability to steer the propulsion unit behind forward propeller without danger of erosive hub vortex cavitation and without dangerous cavitation on the blades after hub of forward cavitation. This will lead to longer lifetime and reduce repairing costs of the propulsion unit.
  • The invention is based to an idea to break the flow of the vortex caused by the blades of the forward propeller. The hub cab of the propeller, in detail the external appearance of the hubcap is formed so that it consists of at least two, equally distributed flow plates projecting from the outer surface of the hubcap. The number of the flow plates is in practice not higher than eight while four flow plates gives the most efficient result.
  • On the other hand the cap itself should be well-streamlined, with relation of cap diameter and cap length not more than 2. It provides the absence of developed separation after hub cap with plates and so make it possible to eliminate blade cavitation in separation zone after fore hub when thruster is not co-axial with fore propeller.
  • The absence of the hub vortex allows the safe operation of after propeller and steerable propulsion unit. The invention is advantageous to implement, as it requires no other modifications to the structure or to operation of the propulsion system or its peripheral devices. Further as the invention mainly is realized with a special forming of a separate component, the invention is adaptable also to the propulsion devices in use.
  • According to one feature of the invention there is installed a well-streamlined hubcap of the fore propeller between two propellers in order to avoid separation after the fore hub.
  • According to another feature of the invention the hubcap of the fore propeller will have the flow plates which are straight and similar to each other. This gives an optimal effect and a balanced structure.
  • According to another feature of the invention the number of the flow plates is independent of the number of the blades of the forward propeller and the position of the flow plates is independent of the position of the blades of the forward propeller. This feature facilitates the planning and installation of the hubcap, as there is no need to align the flow plates with the blades of the propeller. The same structure of the hubcap can be used in the different propeller configurations.
  • It is another further feature of the invention that the diameter of the tip edges of the plates is in the range of 0,4 -2 times the maximum hub diameter. Within this range the efficiency of the invented appliance is especially advantageous.
  • The flow plates are fastened to the hub cab either by fixed to the cap by welding or by with bolts. The size and shape of the flow plates is easy to change and vary if necessary depending of the respective requirements. If the flow plates are used with the vessels in use, this possibility might be desirable. Alternatively the hubcap is moulded as one piece with flow plates whereby the hubcap can be handled as an integrated piece.
  • According to further advantageous feature the aft propeller is turnable and the aft propeller is used to propel and steer the vessel.
  • The details of one preferred embodiment as well as advantages and further features of the invention will be apparent from the following specification and from the drawings. In the drawings:
    • Figure 1 is a schematic view of a CRP arrangement according to the invention,
    • Figure 2a is side view of a hub cap according to the invention and
    • Figure 2b is front view of a hub cab of Figure 2a.
  • Figure 1 shows a propulsion arrangement 2 which is realized with counter rotating propellers (CRP), which is placed under the hull 4 of the vessel. The main propulsion propeller, so called forward propeller 6 is arranged onto the main driving axis 8, which is supported via bearings to the hull 4 of the ship. The forward propeller 6 is driven e.g. by the drive unit, like a diesel engine, directly or via a electric drive that is supplied by a diesel-generator unit by means of a frequency converter which is well-known in the art. The drive unit and the bearing and other features of the power transmission is utilizing conventional technique well-known in the art and there in no need to explain in detail in order to understand the invention. The forward propeller 6 comprises a hub 10 arranged to the driving axis 8 and propeller blades 12 fixed to the hub 10. The number of blades, the inclination of the blades and the size of the blades will be defined when dimensioning the propulsion system of ship and they may vary case by case. The inclination of the blades may also be adjustable.
  • The hull 4 of the ship is designed so that the bottom of the hull curves over the forward propeller 8 and the bottom extends at higher level after the forward propeller. Thus the bottom 14 at the rearmost portion of the ship is higher than the bottom 16 of the ship in front of the forward propeller. Under the bottom 14 there is arranged a turnable steering device 18, which consists of an azimuth propeller unit, like an AZIPODĀ® unit, which steers and propels the vessel. The steering device 18 comprises a shaft 20, which is pillowed to be turnable 360 degrees around its vertical axis. A streamlined casing 21, which covers the driving motor of the steering propeller 22, is attached under the shaft 20. The steering propeller 22 is driven by the driving axis 24, which is positioned on the same level as the axis 8 of the forward propeller.
  • According to the CRP concept the well-streamlined hub cap 30 of the forward propeller 6 and the hub cap 26 of the steering propeller 22 are against each other and the forward propeller 6 and the steering propeller 22 are rotating in the opposite direction when the ship is moving forwards. When turning the direction of the ship the steering device 18 is turned around the vertical axis of the shaft 20 in order to effect the desired steering action.
  • The rotating planes of the forward and steering propellers are farther from each other than the double diameter of the forward propeller when the propellers are against each other. The hub cap 30 of the forward propeller 6 and the hub cap 26 of the steering propeller are thus positioned much closer. The vortex and the stress caused by it effects thus heavily to the hubcap of the forward propeller and also to the steering propeller. According to the teaching of the present invention the hub vortex cavitation and the aft propeller blade cavitation with its harmful effects are minimized by arranging a well-streamlined hub 30 after the forward propeller and flow plates 28 onto the hubcap 30.
  • According to a favourable embodiment of the invention four flow plates 28 are mounted symmetrically or with equal distance to each flow plate on the outer surface of the hubcap 30 as shown in the figures 2a and 2b. The figure 2a is the side view and the figure 2b is the front view when seen from the rear of the vessel. The hubcap has length L and diameter D, whereby the ratio D/L is not higher than 2. The flow plates are straight plates that are welded or fixed by bolts to the surface of the main propeller hubcap 2. The flow plates 2 can also be cast together with the whole propeller hubcap. The flow plate has been installed on the whole length of the cap surface and the flow plates link up to each other outside the cap surface extending a little over the top edge of the cap. In this example the height of the flow plate does not exceed the radial dimensions of the cap. Thus the flow plate does not extend over the diameter of the hubcap. The flow plates are projected in the radial direction from the surface of the hubcap and they are installed in the direction of the propeller axis with no inclination. It has been shown that the tip edges of the flow plates may vary in the range of 0,4 to 2 times the maximum hub diameter D. Accordingly this range corresponds about 0,12 to 0,4 times the diameter of the propeller.
  • The number of the flow plates is not tied to the number of the propeller blades and it may vary from two to eight while four flow plates has been found to be advantageous. Neither the positioning of the flow plates is not bound to the position of the propeller blades but they can coincide or be aside.
  • The invention has been above described using its one modification as an example. The invention may have a lot of different embodiments, the scope of the invention being defined in the claims.

Claims (9)

  1. A counter rotating propulsion system (CRP), which propulsion system comprises an aft propeller (22) installed on a rotatable thruster (18) and a forward propeller (6) installed on a shaft (8) or on a thruster, which propellers are arranged on the essentially same axial line, whereby the aft propeller (22) and the forward propeller (6) have opposite directions of rotating and the aft and forward propellers are arranged against each other, the propellers having a hub with a cap, characterized in that at least two flow plates (28) are arranged on the cap (30) of the forward propeller (6) radially projecting from the cap (30) and that the flow plates (28) are equally distributed on the cap (30).
  2. A counter rotating propulsion system according to claim 1, characterized in that the forward hubcap (30) have diameter to length ratio not higher than 2.
  3. A counter rotating propulsion system according to claim 1 or 2, characterized in that the flow plates (28) are straight and similar to each other.
  4. A counter rotating propulsion system according to any of the claims 1 to 3, characterized in that the number of the flow plates (28) is independent of the number of the blades (12) of the forward propeller (6) and the position of the flow plates (28) is independent of the position of the blades of the forward propeller.
  5. A counter rotating propulsion system according to any of the claims 1 to 4, characterized in that the diameter of the tip edges of the plates (28) are in the range of 0,4 -2 times the maximum hub diameter.
  6. A counter rotating propulsion system according to any of the claims 1 to 5, characterized in that the plates (28) are integrated to the cap (30).
  7. A counter rotating propulsion system according to any of the claims 1 to 6, characterized in that the plates (28) are fixed to the cap (30) by welding or by bolts.
  8. A counter rotating propulsion system according to any of the claims 1 to 7, characterized in that the aft propeller (22) is turnable and the aft propeller (22) is used to propel and to steer the vessel.
  9. A counter rotating propulsion system according to any of the claims 1 to 8, characterized in that the aft propeller (22) being after the forward propeller (6) has a streamlined cap (26).
EP03767842A 2002-12-20 2003-12-19 Arrangement in a propulsion system Expired - Lifetime EP1578662B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FI20022265A FI115210B (en) 2002-12-20 2002-12-20 Device in a propulsion system
FI20022265 2002-12-20
PCT/FI2003/000978 WO2004056654A1 (en) 2002-12-20 2003-12-19 Arrangement in a propulsion system

Publications (2)

Publication Number Publication Date
EP1578662A1 EP1578662A1 (en) 2005-09-28
EP1578662B1 true EP1578662B1 (en) 2010-11-17

Family

ID=8565138

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03767842A Expired - Lifetime EP1578662B1 (en) 2002-12-20 2003-12-19 Arrangement in a propulsion system

Country Status (15)

Country Link
US (1) US20060172632A1 (en)
EP (1) EP1578662B1 (en)
JP (1) JP4005601B2 (en)
KR (1) KR101127484B1 (en)
CN (1) CN1729123A (en)
AT (1) ATE488427T1 (en)
AU (1) AU2003292278B2 (en)
CA (1) CA2509401C (en)
DE (1) DE60335026D1 (en)
DK (1) DK1578662T3 (en)
ES (1) ES2356628T3 (en)
FI (1) FI115210B (en)
NO (1) NO334694B1 (en)
RU (1) RU2304545C2 (en)
WO (1) WO2004056654A1 (en)

Families Citing this family (9)

* Cited by examiner, ā€  Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008149746A (en) * 2006-12-14 2008-07-03 Nakashima Propeller Co Ltd Contra-rotating propeller device for ship
EP2593356B1 (en) * 2010-07-12 2021-03-24 Kongsberg Maritime Sweden AB A propulsion unit for a marine vessel and a marine vessel having a propulsion unit
FI123164B (en) 2010-12-21 2012-11-30 Waertsilae Finland Oy WATER VESSEL
JP5972711B2 (en) * 2012-08-22 2016-08-17 äø‰č±é‡å·„ę„­ę Ŗ式会ē¤¾ Counter-rotating propeller propulsion type ship
EP2897858A4 (en) * 2012-09-24 2016-07-06 Rolls Royce Ab Counter rotating pod with flap
CN105270588A (en) * 2015-10-30 2016-01-27 佛山åø‚ē„žé£ŽčˆŖē©ŗē§‘ęŠ€ęœ‰é™å…¬åø Symmetric double-stage propelling device for ship
CN105523160A (en) * 2016-01-05 2016-04-27 äøŠęµ·čˆ¹čˆ¶ē ”ē©¶č®¾č®”院 Hub connecting structure of forward propeller and rear propeller of contrarotating propeller
WO2017158205A1 (en) 2016-03-18 2017-09-21 Rolls-Royce Marine As Steerable grim-vane propulsion system
CN112061361B (en) * 2020-10-10 2022-05-27 å®ę³¢ęµ·ä¼Æé›†å›¢ęœ‰é™å…¬åø Marine propeller

Family Cites Families (10)

* Cited by examiner, ā€  Cited by third party
Publication number Priority date Publication date Assignee Title
DE606119C (en) 1933-11-12 1934-11-24 Nicholas Wladimir Akimoff Device to increase the efficiency of a screw propeller
CA1341010C (en) * 1986-06-30 2000-05-30 Minnesota Mining And Manufacturing Company Compounds useful in preparing fluorine-containing chiral smectic liquid crystals
EP0255136A1 (en) 1986-07-31 1988-02-03 Mitsui O.S.K. Lines, Ltd. A screw propeller boss cap with fins
JPS641690A (en) * 1987-06-24 1989-01-06 Ishikawajima Harima Heavy Ind Co Ltd Propeller idling device
EP0758606A1 (en) 1995-08-16 1997-02-19 Schottel-Werft Josef Becker GmbH & Co KG. Hub cap for ship propellers
US6899576B2 (en) * 1997-11-07 2005-05-31 Schottel Gmbh & Co. Kg Twin-propeller drive for watercraft
FI110595B (en) * 2000-01-28 2003-02-28 Abb Oy Arrangements in vessels, procedure for utilization of space in vessels and arrangements in installation of propulsion unit
US6280284B1 (en) * 2000-03-17 2001-08-28 Carl Winefordner Toy submarine with counter rotating propellers
FI116129B (en) * 2003-04-07 2005-09-30 Waertsilae Finland Oy Watercraft Propulsion Unit
FI20030556A0 (en) * 2003-04-11 2003-04-11 Abb Oy Method and equipment for steering the ship

Also Published As

Publication number Publication date
ATE488427T1 (en) 2010-12-15
AU2003292278A1 (en) 2004-07-14
US20060172632A1 (en) 2006-08-03
RU2304545C2 (en) 2007-08-20
JP2006510532A (en) 2006-03-30
DK1578662T3 (en) 2011-02-21
CA2509401C (en) 2011-07-19
KR20050084403A (en) 2005-08-26
DE60335026D1 (en) 2010-12-30
NO20053510L (en) 2005-07-18
CA2509401A1 (en) 2004-07-08
EP1578662A1 (en) 2005-09-28
CN1729123A (en) 2006-02-01
FI20022265A (en) 2004-06-21
FI20022265A0 (en) 2002-12-20
JP4005601B2 (en) 2007-11-07
FI115210B (en) 2005-03-31
AU2003292278B2 (en) 2008-10-09
WO2004056654A1 (en) 2004-07-08
RU2005122954A (en) 2006-01-20
ES2356628T3 (en) 2011-04-11
NO334694B1 (en) 2014-05-12
KR101127484B1 (en) 2012-03-23

Similar Documents

Publication Publication Date Title
KR101205683B1 (en) A marine propulsion set comprising a pod designed to be installed under the hull of a ship
KR20080056147A (en) Multiple nozzle venturi system for watercraft
US20130202451A1 (en) Safety propeller
WO2000058149A1 (en) Drive means in a boat
EP1169222A1 (en) Drive means in a boat
US6152791A (en) External electric drive propulsion module arrangement for swath vessels
NO334694B1 (en) Device in a counter-rotating propulsion system (CRP).
CA2412300C (en) Hull and propeller arrangement
US10703453B2 (en) Marine vessel
AU2001256920A1 (en) Hull and propeller arrangement
JP2004026018A (en) Side thruster for marine vessel
US5906522A (en) Thrust enhancer for marine propeller
US5890937A (en) Propeller shroud
US20030148675A1 (en) Anti-cavitation tunnel for marine propellers
WO2000058151A1 (en) Drive means in a boat
WO2000058148A1 (en) Drive means in a boat
NL2021426B1 (en) A method of providing a watercraft with a thruster; a thruster unit, and a watercraft.
AU2001255979B2 (en) Anti-cavitation tunnel for marine propellers
AU2001255979A1 (en) Anti-cavitation tunnel for marine propellers
NO802205L (en) PROPELLER FOR WATER CRAFT.

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20050713

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK

DAX Request for extension of the european patent (deleted)
17Q First examination report despatched

Effective date: 20081222

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REF Corresponds to:

Ref document number: 60335026

Country of ref document: DE

Date of ref document: 20101230

Kind code of ref document: P

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

REG Reference to a national code

Ref country code: DK

Ref legal event code: T3

REG Reference to a national code

Ref country code: NL

Ref legal event code: T3

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2356628

Country of ref document: ES

Kind code of ref document: T3

Effective date: 20110411

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20101117

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110317

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20101117

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20101117

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110217

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20101117

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110218

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20101117

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20101231

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20101117

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20101117

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20101117

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20101117

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20110818

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20101231

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20101219

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20101231

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 60335026

Country of ref document: DE

Effective date: 20110818

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20101219

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110518

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20101117

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20141211

Year of fee payment: 12

Ref country code: GB

Payment date: 20141219

Year of fee payment: 12

Ref country code: SE

Payment date: 20141219

Year of fee payment: 12

Ref country code: DK

Payment date: 20141219

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20141219

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20141218

Year of fee payment: 12

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20151214

Year of fee payment: 13

Ref country code: FR

Payment date: 20151221

Year of fee payment: 13

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 60335026

Country of ref document: DE

REG Reference to a national code

Ref country code: DK

Ref legal event code: EBP

Effective date: 20151231

REG Reference to a national code

Ref country code: SE

Ref legal event code: EUG

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20151219

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20151220

REG Reference to a national code

Ref country code: NL

Ref legal event code: MM

Effective date: 20160101

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160101

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20151219

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160701

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20151219

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20151231

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20170831

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20170102

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20161220

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20181116