EP0337849B1 - Under-water buoy equipped with hydrodynamic stabilisation means, to be suspended, particularly from a helicopter - Google Patents

Under-water buoy equipped with hydrodynamic stabilisation means, to be suspended, particularly from a helicopter Download PDF

Info

Publication number
EP0337849B1
EP0337849B1 EP89400919A EP89400919A EP0337849B1 EP 0337849 B1 EP0337849 B1 EP 0337849B1 EP 89400919 A EP89400919 A EP 89400919A EP 89400919 A EP89400919 A EP 89400919A EP 0337849 B1 EP0337849 B1 EP 0337849B1
Authority
EP
European Patent Office
Prior art keywords
buoy
ballast
ailerons
helicopter
suspended
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
EP89400919A
Other languages
German (de)
French (fr)
Other versions
EP0337849A1 (en
Inventor
François Warnan
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.)
Thales SA
Original Assignee
Thomson CSF SA
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 Thomson CSF SA filed Critical Thomson CSF SA
Publication of EP0337849A1 publication Critical patent/EP0337849A1/en
Application granted granted Critical
Publication of EP0337849B1 publication Critical patent/EP0337849B1/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
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B22/00—Buoys
    • B63B22/003—Buoys adapted for being launched from an aircraft or water vehicle;, e.g. with brakes deployed in the water
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/004—Mounting transducers, e.g. provided with mechanical moving or orienting device
    • G10K11/006—Transducer mounting in underwater equipment, e.g. sonobuoys

Definitions

  • the present invention relates to underwater buoys intended to be submerged and held between two waters at the end of a cable, itself attached to a carrier vehicle such as a helicopter, according to the preamble of claim 1.
  • These buoys allow among other things to detect, either by passive listening, or using a sonar, submerged objects, in particular submarines.
  • the influence of these rings is different depending on whether the buoy dives or goes up.
  • the upper ring 12 is effective in stabilizing the buoy during the descent, but on the other hand it has tendency during ascent to behave like a wing which causes a vortex movement as shown in Figure 2.
  • the bottom ring in principle overcomes this drawback by opposing this swirling movement, since it is placed below the center of gravity of the buoy. However during the descent this bottom ring 13 also behaves like a wing and tends to generate a vortex movement itself. This movement is not exactly the same as that generated during the ascent by the ring 12 because the action of the ballast 14 is not identical to the traction of the cable 11, but in total the effects of the two rings are upset and the overall result is ineffective.
  • the invention proposes replacing the bottom stabilization ring with a set of retractable fins during the descent, and therefore without effect during this phase, and deployable during the ascent to stabilize the buoy.
  • the body is provided at its lower part with a set of fins according to the characteristics of the characterizing part of claim 1.
  • FIG. 3 shows a view of the lower part of a buoy according to the invention provided, for easier reading of the drawing, only with two fins 15 and 16.
  • the ballast 14 is for example machined so that its circumference is substantially set back from the body cylindrical 10 of the buoy.
  • This cylindrical part is provided with lugs 17 and 18 which project towards the outside of the ballast and are provided with pins on which are fixed, by one end, fins 15 and 16. These can thus rotate around these axes which are located in a plane perpendicular to the axis of the buoy and are tangent to the circumference of the ballast.
  • the profile of these fins is advantageously that of a wing with the leading edge directed downwards. During the ascent the profile of this wing thus works upside down, but the possible appearance of vortices at this time does not present any serious drawbacks.
  • the ailerons being mounted free on their axis of rotation, it is clear that they will tend to remain deployed when the buoy will go up towards the helicopter to which it is suspended to come to enter the receiving part in the form of funnel located below the helicopter and known as the funnel.
  • the dimensions of the fins are chosen so that their free ends do not exceed, when deployed, the diameter determined by the upper ring 12.
  • FIG. 4 shows a complete view of a buoy according to the invention comprising a set of fins 15, seen in the deployed position, and which form a crown all around the ballast 14 at the lower part of the body 10 of the buoy.
  • 12 long fins of 80 mm, width of 15 mm and having a thickness in the center equal to 3 mm were used.
  • the hydrodynamic force on each aileron is substantially equal to 1 N, which is more than enough to obtain a rotation of the aileron around the axis and to keep it in the folded position on along the body of the buoy.

Landscapes

  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Laying Of Electric Cables Or Lines Outside (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
  • Catching Or Destruction (AREA)
  • Bridges Or Land Bridges (AREA)

Description

La présente invention se rapporte aux bouées sous-marines destinées à être immergées et maintenues entre deux eaux au bout d'un câble, lui-même accroché à un véhicule porteur tel qu'un hélicoptère, selon le préambule de la revendication 1. Ces bouées permettent entre autres de détecter, soit par écoute passive, soit à l'aide d'un sonar, les objets immergés, notamment les sous-marins.The present invention relates to underwater buoys intended to be submerged and held between two waters at the end of a cable, itself attached to a carrier vehicle such as a helicopter, according to the preamble of claim 1. These buoys allow among other things to detect, either by passive listening, or using a sonar, submerged objects, in particular submarines.

Les sous-marins pouvant descendre à des profondeurs de plus en plus grandes, il convient, pour les détecter avec sûreté, de descendre les bouées de détection à des profondeurs du même ordre, c'est-à-dire plusieurs centaines de mètres. Ceci impose bien entenu de dérouler et d'enrouler le câble porteur sur une même longueur en évitant des oscillations, nuisibles tant par les variations de tension apportées au câble que par les risques de mélange des spires sur le tambour du treuil sur lequel s'enroule ce câble.Since submarines can descend to ever greater depths, it is advisable, in order to detect them with safety, to lower the detection buoys to depths of the same order, that is to say several hundred meters. This clearly requires to unwind and wind the carrying cable over the same length, avoiding oscillations, which are harmful both by the variations in tension brought to the cable and by the risks of mixing the turns on the winch drum on which it is wound. this cable.

Ces oscillations sont dues au ralentissement de la bouée lorsqu'elle se met en biais, ou même en travers, sous l'effet des instabilités hydrodynamiques dues au mouvement relatif de l'eau par rapport à la bouée. Pour supprimer ces instabilités et maintenir la bouée verticale pendant la descente ou la montée, il est connu, comme représenté sur la figure 1, de munir le corps 10 de cette bouée, suspendue au bout du câble 11, d'un anneau supérieur 12 et d'un anneau inférieur 13 qui entourent les extrémités de ce corps en ménageant entre celui-ci et eux-mêmes un espace destiné à laisser passer les filets d'eau pendant le mouvement de la bouée. En outre la bouée comprend un lest 14 placé à son extrémité inférieure.These oscillations are due to the slowing down of the buoy when it is tilted, or even across, under the effect of hydrodynamic instabilities due to the relative movement of water with respect to the buoy. To eliminate these instabilities and maintain the vertical buoy during the descent or the ascent, it is known, as shown in FIG. 1, to provide the body 10 of this buoy, suspended at the end of the cable 11, with an upper ring 12 and of a lower ring 13 which surround the ends of this body, providing between it and themselves a space intended to allow the streams of water to pass during the movement of the buoy. In addition, the buoy includes a ballast 14 placed at its lower end.

L'influence de ces anneaux est différente selon que la bouée plonge ou remonte. L'anneau du haut 12 est efficace pour stabiliser la bouée pendant la descente, mais en revanche il a tendance lors de la remontée à se comporter comme une aile ce qui entraîne un mouvement tourbillonnaire comme représenté sur la figure 2.The influence of these rings is different depending on whether the buoy dives or goes up. The upper ring 12 is effective in stabilizing the buoy during the descent, but on the other hand it has tendency during ascent to behave like a wing which causes a vortex movement as shown in Figure 2.

L'anneau du bas permet en principe de remédier à cet inconvénient en s'opposant à ce mouvement tourbillonnaire, puisqu'il est placé en-dessous du centre de gravité de la bouée. Cependant lors de la descente cet anneau du bas 13 se comporte lui aussi comme une aile et tend à engendrer lui-même un mouvement tourbillonnaire. Ce mouvement n'est pas exactement le même que celui engendré lors de la remontée par l'anneau 12 parce que l'action du lest 14 n'est pas identique à la traction du câble 11, mais au total les effets des deux anneaux se contrarient et le résultat d'ensemble est peu efficace.The bottom ring in principle overcomes this drawback by opposing this swirling movement, since it is placed below the center of gravity of the buoy. However during the descent this bottom ring 13 also behaves like a wing and tends to generate a vortex movement itself. This movement is not exactly the same as that generated during the ascent by the ring 12 because the action of the ballast 14 is not identical to the traction of the cable 11, but in total the effects of the two rings are upset and the overall result is ineffective.

Pour pallier ces inconvénients, l'invention propose de remplacer l'anneau de stabilisation du bas par un ensemble d'ailerons escamotables lors de la descente, et donc sans effet pendant cette phase, et déployables pendant la remontée pour stabiliser la bouée.To overcome these drawbacks, the invention proposes replacing the bottom stabilization ring with a set of retractable fins during the descent, and therefore without effect during this phase, and deployable during the ascent to stabilize the buoy.

A cet effet, le corps est muni à sa partie inférieure d'un ensemble d'ailerons selon les caractéristiques de la partie caractérisante de la revendication 1.To this end, the body is provided at its lower part with a set of fins according to the characteristics of the characterizing part of claim 1.

D'autres particularités et avantages de l'invention apparaîtront clairement dans la description suivante présentée en face des figures annexées qui représentent :

  • la figure 1, une vue d'une bouée selon l'art antérieur ;
  • la figure 2, une représentation du mouvement d'une bouée selon l'art antérieur ne comportant qu'un anneau de stabilisation supérieur ;
  • la figure 3, un schéma du bas d'une bouée comportant des ailerons escamotables selon l'invention ; et
  • la figure 4, une vue d'ensemble d'une bouée comportant ces mêmes ailerons.
Other features and advantages of the invention will appear clearly in the following description presented opposite the appended figures which represent:
  • Figure 1, a view of a buoy according to the prior art;
  • Figure 2, a representation of the movement of a buoy according to the prior art comprising only an upper stabilization ring;
  • Figure 3, a diagram of the bottom of a buoy comprising retractable fins according to the invention; and
  • Figure 4, an overview of a buoy having these same fins.

On a représenté sur la figure 3 une vue de la partie inférieure d'une bouée selon l'invention munie, pour faciliter la lecture du dessin, seulement de deux ailerons 15 et 16.FIG. 3 shows a view of the lower part of a buoy according to the invention provided, for easier reading of the drawing, only with two fins 15 and 16.

Le lest 14 est par exemple usiné de manière à ce que sa circonférence soit sensiblement en retrait du corps cylindrique 10 de la bouée. Cette partie cylindrique est munie de pattes 17 et 18 qui font saillie vers l'extérieur du lest et sont munies d'axes sur lesquels viennent se fixer, par une extrémité, des ailerons 15 et 16. Ceux-ci peuvent ainsi tourner autour de ces axes lesquels sont situés dans un plan perpendiculaire à l'axe de la bouée et sont tangents à la circonférence du lest.The ballast 14 is for example machined so that its circumference is substantially set back from the body cylindrical 10 of the buoy. This cylindrical part is provided with lugs 17 and 18 which project towards the outside of the ballast and are provided with pins on which are fixed, by one end, fins 15 and 16. These can thus rotate around these axes which are located in a plane perpendicular to the axis of the buoy and are tangent to the circumference of the ballast.

Ainsi lors de la descente les ailerons pivotent autour des axes pour venir se replier contre le corps de la bouée comme l'aileron 15 sur la figure. Lors de la remontée ces ailerons se déploient de manière à faire saillie vers l'extérieur de ce corps et radialement à celui-ci comme l'aileron 16 sur la figure. Bien entendu tous les ailerons sont simultanément déployés ou repliés et la position contrariée des ailerons 15 et 16 sur la figure 3 sert uniquement à un but d'explication.Thus during the descent the fins pivot around the axes to come back against the body of the buoy like the aileron 15 in the figure. During the ascent these fins are deployed so as to project outwards from this body and radially to it like the aileron 16 in the figure. Of course all the ailerons are simultaneously deployed or folded and the opposite position of the ailerons 15 and 16 in FIG. 3 is used only for the purpose of explanation.

Afin d'éviter des tourbillons éventuellement gênants pour la stabilité de la bouée pendant la descente, la profil de ces ailerons est avantageusement celui d'une aile avec le bord d'attaque dirigé vers le bas. Lors de la remontée le profil de cette aile fonctionne ainsi à l'envers, mais l'apparition éventuelle de tourbillons à ce moment ne présente pas d'inconvénients sérieux.In order to avoid possible eddies which are troublesome for the stability of the buoy during the descent, the profile of these fins is advantageously that of a wing with the leading edge directed downwards. During the ascent the profile of this wing thus works upside down, but the possible appearance of vortices at this time does not present any serious drawbacks.

Les ailerons étant montés libres sur leur axe de rotation, il est clair qu ils auront tendance à rester déployés lorsque la bouée remontera vers l'hélicoptère auquel elle est suspendue pour venir rentrer dans la partie réceptrice en forme d'entonnoir situé en-dessous de l'hélicoptère et connue sous le nom de funnel. Pour éviter que les extrémités des ailerons ne viennent accrocher la paroi de ce funnel dans la phase terminale de la remontée, les dimensions des ailerons sont choisies pour que leurs extrémités libres ne dépassent pas, lorsqu'ils sont déployés, le diamètre déterminée par l'anneau supérieur 12.The ailerons being mounted free on their axis of rotation, it is clear that they will tend to remain deployed when the buoy will go up towards the helicopter to which it is suspended to come to enter the receiving part in the form of funnel located below the helicopter and known as the funnel. To prevent the ends of the fins from catching the wall of this funnel in the terminal phase of the ascent, the dimensions of the fins are chosen so that their free ends do not exceed, when deployed, the diameter determined by the upper ring 12.

On a représenté sur la figure 4 une vue complète d'une bouée selon l'invention comportant un ensemble d'ailerons 15, vus en position déployée, et qui forment une couronne tout autour du lest 14 à la partie inférieure du corps 10 de la bouée.FIG. 4 shows a complete view of a buoy according to the invention comprising a set of fins 15, seen in the deployed position, and which form a crown all around the ballast 14 at the lower part of the body 10 of the buoy.

Dans un exemple particulier de réalisation on a utilisé 12 ailerons longs de 80 mm, larges de 15 mm et présentant une épaisseur au centre égale à 3 mm.In a particular embodiment, 12 long fins of 80 mm, width of 15 mm and having a thickness in the center equal to 3 mm were used.

Pour une vitesse de descente égale à 6 m/s, la force hydrodynamique sur chaque aileron est sensiblement égale à 1 N, ce qui est largement suffisant pour obtenir une rotation de l'aileron autour de l'axe et son maintien en position repliée le long du corps de la bouée.For a descent speed equal to 6 m / s, the hydrodynamic force on each aileron is substantially equal to 1 N, which is more than enough to obtain a rotation of the aileron around the axis and to keep it in the folded position on along the body of the buoy.

Dans ces conditions, on a constaté une bonne stabilisation de la bouée lors de la descente et aucune amorce particulière de mise en rotation lors de la remontée.Under these conditions, good stabilization of the buoy was observed during the descent and no particular initiation of rotation during the ascent.

Il est clair que la fixation des ailerons à l'aide de pattes et d'axes qui a été décrite ci-dessus n'est qu'un mode particulier de réalisation de l'invention et que tout autre mode de réalisation permettant le repliement et le redéploiement des ailerons, par exemple des fentes pratiquées dans le lest, ou des bossages prévus sur ce lest lors de l'usinage, entre dans le cadre de l'invention.It is clear that the attachment of the fins using lugs and pins which has been described above is only a particular embodiment of the invention and that any other embodiment allowing the folding and the redeployment of the fins, for example slots made in the ballast, or bosses provided on this ballast during machining, is within the scope of the invention.

Claims (5)

1. A submarine buoy provided with hydrodynamic stabilizing means and adapted to be suspended by a cable (11), more particularly from a helicopter, of the type comprising a member provided it its upper part with a stabilizing ring (12), characterized in that this said member is provided in its lower part with an array of ailerons (15 and 16) which are folded back during descent into the water in order to then have substantially no action and unfolding during the return ascent in order to stabilize the movement of the buoy, more particularly by preventing rotary movement thereof.
2. The buoy as claimed in claim 1, characterized in that the ailerons (15 and 16) have an outline in the form of a vertical wing whose attack edge is directed towards the bottom of the buoy.
3. The buoy as claimed in claim 1 or in claim 2, characterized in that the member (10) is provided in its lower part with ballast (14) machined to be clear of the circumference of the member, said ballast being provided with articulation points (17 and 18) positioned at its periphery in order to maintain the ailerons in place.
4. The buoy as claimed in claim 3, characterized in that the articulation points are constituted by feet secured to the ballast and having horizontal axes.
5. The buoy as claimed in claim 3, characterized in that the articulation points are constituted by hollow gaps in the ballast and having horizontal axes.
EP89400919A 1988-04-12 1989-04-04 Under-water buoy equipped with hydrodynamic stabilisation means, to be suspended, particularly from a helicopter Expired - Lifetime EP0337849B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8804829 1988-04-12
FR8804829A FR2629787B1 (en) 1988-04-12 1988-04-12 SUBMARINE BUOY PROVIDED WITH HYDRODYNAMIC STABILIZATION MEANS AND HANGING, ESPECIALLY FROM A HELICOPTER

Publications (2)

Publication Number Publication Date
EP0337849A1 EP0337849A1 (en) 1989-10-18
EP0337849B1 true EP0337849B1 (en) 1992-02-12

Family

ID=9365234

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89400919A Expired - Lifetime EP0337849B1 (en) 1988-04-12 1989-04-04 Under-water buoy equipped with hydrodynamic stabilisation means, to be suspended, particularly from a helicopter

Country Status (7)

Country Link
US (1) US4954110A (en)
EP (1) EP0337849B1 (en)
AU (1) AU617786B2 (en)
CA (1) CA1331112C (en)
DE (1) DE68900820D1 (en)
ES (1) ES2029119T3 (en)
FR (1) FR2629787B1 (en)

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2244687B (en) * 1990-06-06 1993-10-27 British Aerospace Stabilisation systems for aerodynamic bodies.
FR2676725B1 (en) * 1991-05-21 1998-01-09 Thomson Csf WINCH FOR TOWING UNDERWATER OBJECTS.
FR2714663B1 (en) * 1993-12-30 1996-01-26 Thomson Csf Winch with hydraulic motor, in particular for helicopter equipped with a sonar.
US5443408A (en) * 1994-03-08 1995-08-22 N. A. Taylor Co., Inc. Low drag buoy
FR2735645B1 (en) * 1995-06-16 1997-07-25 Thomson Csf TRAILER ACOUSTIC TRANSMITTER
US5627802A (en) * 1995-06-19 1997-05-06 Langer Electronics Corp. Sound amplification system having a submersible microphone
USD386499S (en) * 1995-09-26 1997-11-18 Langer Electronics Corp. Hydrophone housing
US6842006B2 (en) * 2002-06-27 2005-01-11 Schlumberger Technology Corporation Marine electromagnetic measurement system
US7065918B2 (en) * 2004-06-23 2006-06-27 Leone Ernest Weighted fishing leader drag apparatus
NO323388B1 (en) * 2005-06-29 2007-04-16 Abyssus Marine Services As Acoustic buoy.
US7453165B2 (en) * 2006-10-24 2008-11-18 Seadyne Energy Systems, Llc Method and apparatus for converting ocean wave energy into electricity
US7737569B2 (en) * 2006-10-24 2010-06-15 Seadyne Energy Systems, Llc System and method for converting ocean wave energy into electricity
WO2008110636A1 (en) * 2007-03-13 2008-09-18 Praesentis, S.L. Underwater inspection device
US8461730B2 (en) 2010-05-12 2013-06-11 Science Applications International Corporation Radial flux permanent magnet alternator with dielectric stator block
US9051918B1 (en) 2011-02-25 2015-06-09 Leidos, Inc. Vertical axis wind turbine with tensile support structure having rigid or collapsible vanes
US9133815B1 (en) 2011-05-11 2015-09-15 Leidos, Inc. Propeller-type double helix turbine apparatus and method
US8866328B1 (en) 2011-06-07 2014-10-21 Leidos, Inc. System and method for generated power from wave action
US9331535B1 (en) 2012-03-08 2016-05-03 Leidos, Inc. Radial flux alternator
US10155678B2 (en) 2012-07-05 2018-12-18 Murtech, Inc. Damping plate sand filtration system and wave energy water desalination system and methods of using potable water produced by wave energy desalination
US8778176B2 (en) 2012-07-05 2014-07-15 Murtech, Inc. Modular sand filtration—anchor system and wave energy water desalination system incorporating the same
US8784653B2 (en) 2012-07-05 2014-07-22 Murtech, Inc. Modular sand filtration-anchor system and wave energy water desalinization system incorporating the same
US8866321B2 (en) 2012-09-28 2014-10-21 Murtech, Inc. Articulated-raft/rotary-vane pump generator system
US8814469B2 (en) * 2012-12-10 2014-08-26 Murtech, Inc. Articulated bed-mounted finned-spar-buoy designed for current energy absorption and dissipation
US9487282B2 (en) 2014-04-08 2016-11-08 Mrv Systems, Llc Underwater vehicles configured to perform vertical profiling and diagonal profiling, and corresponding methods of operation
US9334860B2 (en) 2014-07-11 2016-05-10 Murtech, Inc. Remotely reconfigurable high pressure fluid passive control system for controlling bi-directional piston pumps as active sources of high pressure fluid, as inactive rigid structural members or as isolated free motion devices
US9702334B2 (en) 2015-03-16 2017-07-11 Murtech, Inc. Hinge system for an articulated wave energy conversion system
US9381987B1 (en) 2015-10-01 2016-07-05 Mrv Systems, Llc Air-based-deployment-compatible underwater vehicle configured to perform vertical profiling and, during information transmission, perform motion stabilization at a water surface, and associated methods
ES2864532T3 (en) 2017-01-18 2021-10-14 Murtech Inc Articulated wave energy conversion system using a compound lever arm barge

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3159806A (en) * 1960-05-06 1964-12-01 Frank N Piasecki High speed tow sonar system
GB1072883A (en) * 1964-11-27 1967-06-21 Burndept Electronics Ltd Radio rescue beacon
US3296996A (en) * 1965-03-24 1967-01-10 Continental Oil Co Method and apparatus for slowing the forward speed of a towed submerged vessel
US3380424A (en) * 1966-03-17 1968-04-30 Continental Oil Co Vessel arresting apparatus
US3327968A (en) * 1966-04-01 1967-06-27 Francis Associates Inc Aircraft towed underwater skip probe
US3672322A (en) * 1970-05-20 1972-06-27 Continental Oil Co Method and apparatus for towing a submersible barge
US3618555A (en) * 1970-07-06 1971-11-09 Us Navy Controlled diversion apparatus
US3755836A (en) * 1970-09-28 1973-09-04 Itt Stabilization arrangement for communication buoys
US3793623A (en) * 1972-10-02 1974-02-19 Bendix Corp Hydrodynamic stabilizing device
FR2438588A2 (en) * 1975-09-11 1980-05-09 France Etat Release system for submarine listening buoy - acts against spring action when parachuted buoy contacts water
FR2464179A2 (en) * 1979-08-28 1981-03-06 Thomson Csf LARGABLE AIRBORNE BUOY
GB2123774B (en) * 1982-07-06 1986-02-05 Plessey Co Plc Stabilised underwater apparatus for being towed or tethered

Also Published As

Publication number Publication date
US4954110A (en) 1990-09-04
DE68900820D1 (en) 1992-03-26
FR2629787B1 (en) 1991-01-25
CA1331112C (en) 1994-08-02
AU3266989A (en) 1989-10-19
EP0337849A1 (en) 1989-10-18
ES2029119T3 (en) 1992-07-16
FR2629787A1 (en) 1989-10-13
AU617786B2 (en) 1991-12-05

Similar Documents

Publication Publication Date Title
EP0337849B1 (en) Under-water buoy equipped with hydrodynamic stabilisation means, to be suspended, particularly from a helicopter
EP3854673B1 (en) Method for installing an offshore wind turbine provided with a floating support structure
WO2016034814A1 (en) Retractable wing
FR2927958A1 (en) DEVICE FOR COLLECTING THE ENERGY OF THE WAVE.
FR2887224A1 (en) MULTIMILIED EQUIPMENT
EP2392508A2 (en) Method and device for opening an inflated wall
EP2620634B1 (en) Rotor of a marine turbine comprising at least one blade rotatably mobile about a radial axis, and means for limiting the rotational movement of said blade, and marine turbine including such a rotor
CA2880288A1 (en) Wing for ship propulsion
EP0007830A1 (en) Air-dropped buoy
WO1999022987A1 (en) Fender for protecting boat hulls against wear
EP0069019A1 (en) Apparatus for well perforation
WO2020239346A1 (en) Underwater device and underwater system
BE887882A (en) STRUCTURE FOR SUPPORTING APPARATUS ABOVE THE BOTTOM OF A MASS OF WATER
EP2905218A1 (en) Device for storing a sail
EP3871000B1 (en) Sonar system
CA1129259A (en) Anchoring system
WO2018127631A1 (en) Mechanism for actuating and adjusting a foil of a boat with four degrees of freedom
FR2642723A1 (en) ANCHORING DEVICE WITH STABILIZATION PIECE
WO1999019205A1 (en) Device for stabilising a ship's trim anchored or adrift
FR2808251A1 (en) Trimaran has variable wheelbase, and comprises central hull and two lateral floats mounted either side beam fixed to hull by principal turret
WO2003004349A1 (en) Device for damping the movements of an anchored boat
FR2833238A1 (en) Multi-hull hydrofoil boat comprises support fin keels at free ends of connecting beams extending beyond stabilizer floats
WO2019064105A1 (en) Motor boat with retractable foils having an asymmetrical configuration in the passive position
FR2632269A1 (en) DEVICE FOR BONDING A LOAD TO A BUILDING
FR2593278A1 (en) DEVICE FOR PYROTECHNIC ARTIFICE WITH REDUCED DOWNWARD SPEED

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

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE ES GB IT NL

17P Request for examination filed

Effective date: 19900309

17Q First examination report despatched

Effective date: 19910723

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES GB IT NL

ITF It: translation for a ep patent filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REF Corresponds to:

Ref document number: 68900820

Country of ref document: DE

Date of ref document: 19920326

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2029119

Country of ref document: ES

Kind code of ref document: T3

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

Ref country code: NL

Payment date: 19970320

Year of fee payment: 9

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

Ref country code: ES

Payment date: 19970422

Year of fee payment: 9

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 EXPIRATION OF PROTECTION

Effective date: 19980406

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: 19981101

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 19981101

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20000301

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

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

Ref country code: GB

Payment date: 20040331

Year of fee payment: 16

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

Ref country code: DE

Payment date: 20050331

Year of fee payment: 17

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

Ref country code: GB

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

Effective date: 20050404

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

Effective date: 20050404

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

Ref country code: IT

Payment date: 20060430

Year of fee payment: 18

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

Ref country code: DE

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

Effective date: 20061101

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: 20070404