EP0349394B1 - Boat keels - Google Patents

Boat keels Download PDF

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Publication number
EP0349394B1
EP0349394B1 EP89401770A EP89401770A EP0349394B1 EP 0349394 B1 EP0349394 B1 EP 0349394B1 EP 89401770 A EP89401770 A EP 89401770A EP 89401770 A EP89401770 A EP 89401770A EP 0349394 B1 EP0349394 B1 EP 0349394B1
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EP
European Patent Office
Prior art keywords
keel
water
elongated capacity
elongated
fact
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
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EP89401770A
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German (de)
French (fr)
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EP0349394A1 (en
Inventor
Michel Eymard
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Zodiac International SA
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Zodiac International SA
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Priority to AT89401770T priority Critical patent/ATE72183T1/en
Publication of EP0349394A1 publication Critical patent/EP0349394A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B13/00—Conduits for emptying or ballasting; Self-bailing equipment; Scuppers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B41/00—Drop keels, e.g. centre boards or side boards ; Collapsible keels, or the like, e.g. telescopically; Longitudinally split hinged keels

Definitions

  • the invention relates to keels for boats, motor or sail, these boats therefore comprising at least one submerged longitudinal element, hereinafter called “keel”, intended to ensure the boat good sailing qualities.
  • the object of the present invention is to remedy all of these drawbacks by proposing a boat comprising at least one keel the efficiency of which can vary depending on the speed of the boat, the material existence of which is subject to change (it that is to say that the keel is not constituted by a permanent and permanent structure and that therefore it may or may not ensure a role of keel depending on the circumstances).
  • the present invention also aims at a boat with at least one keel, the characteristic of which is to be substantially less fragile than a conventional keel.
  • the present invention also aims a boat with at least one keel whose characteristic is to be of a relative cost (compared to the total cost of the boat) significantly lower than that of a conventional keel.
  • the present invention also aims at a boat with at least one keel, the characteristic of which is that it is easier to assemble than that of a conventional keel.
  • the boat comprises at least one keel essentially constituted by an elongated capacity formed of a flexible, deformable and waterproof material, and it is characterized in that this keel comprises at least one opening. admission of water provided in the wall of the elongated capacity constituting it, facing the bow of the boat and kept open.
  • the water stopping pressure reigns in the keel as soon as the boat is driven in forward speed, said keel then being at least partially filled with water.
  • this water intake opening is located towards the rear part of the elongated capacity.
  • the elongated capacity is provided with at least one air discharge orifice of dimensions much smaller (in proportions of about 1 to 10) than those of the intake opening of water.
  • this air discharge orifice is situated opposite the water intake opening, that is to say that, in the case where said water intake opening is situated towards the rear of the elongated capacity, the air discharge orifice is situated towards the front of the capacity lying down.
  • the water intake opening can advantageously be arranged in the form of a scoop kept open by stiffening, at least partially, around the opening the material constituting the elongated capacity.
  • the invention consists, apart from the arrangements which have just been mentioned, in certain other arrangements, which are preferably used at the same time, and which will be more explicitly discussed below.
  • the boat shown in FIG. 1 comprises a hull 1 fitted with propulsion means 2 (constituted for example by an "in board” motor 2 a and a Z-shaped transmission 2 b ).
  • propulsion means 2 constituted for example by an "in board” motor 2 a and a Z-shaped transmission 2 b ).
  • the boat may have a flat bottom 1 a and be provided with a keel generally designated by the reference numeral 3.
  • This keel 3 is essentially constituted by an elongated capacity 4 formed from a flexible deformable and waterproof material.
  • Means are provided to make the stop pressure of the water reign in this elongated capacity 4 as soon as the boat 1 is in motion (forward) , said elongated capacity 4 then being at least partially filled with water.
  • the means 5, to make prevail in the elongated capacity 4 the water stop pressure as soon as the boat is in motion, are constituted by a water intake opening 6 formed in the wall of the elongated capacity 4, facing the bow of the boat, and kept open.
  • This water intake opening 6 is preferably located towards the rear part of the elongated capacity 4.
  • the elongated capacity 4 can be provided with at least one air discharge orifice 7 of dimensions much smaller than those of the water intake opening 6; this air evacuation orifice 7 can be arranged in the part of the elongated capacity 4 which is situated opposite the water intake opening 6.
  • the air evacuation orifice 7 is located towards the front part of the elongated capacity 4.
  • the retraction means can be of different natures and it is advantageous to have recourse to elastic means constituted by the flexible material constituting the elongated capacity 4, a flexible material which is then chosen from a material having elastic properties.
  • FIGS. 6 and 7 in which the same reference numerals designate the same members as in FIG. 2, a particular arrangement of the invention has been illustrated which allows, even when the boat is stopped, to have available 'a keel with a certain rigidity.
  • the keel of the boat has a low rigidity due solely to the gas pressure which prevails in the enclosure 8.
  • the keel has a higher rigidity, corresponding to the stopping pressure of the water which is equal to the gas pressure prevailing in the enclosure 8, said enclosure 8 therefore seeing its volume reduced to a lower value.
  • the water intake opening 6 it can advantageously be arranged in the form of a scoop kept open by stiffening, at least partially, around the opening proper 6 the material constituting the elongated capacity. 4.

Abstract

The boat comprises a keel (3) essentially consisting of an elongated volume (4) formed from a flexible, deformable and watertight material. A water-inlet orifice (6) is formed in the wall of this elongated volume (4), turned towards the bow of the boat and held open in order to cause the pressure stopping the water to prevail in this elongated volume (4) as soon as the boat is moving forwards, the said elongated volume (4) then being at least partially filled with water. <IMAGE>

Description

L'invention est relative aux quilles pour embarcations, à moteur ou à voile, ces embarcations comportant donc au moins un élément longitudinal immergé, appelé ci-après "quille", destiné à assurer à l'embarcation de bonnes qualités de navigation.The invention relates to keels for boats, motor or sail, these boats therefore comprising at least one submerged longitudinal element, hereinafter called "keel", intended to ensure the boat good sailing qualities.

Jusqu'à ce jour, la ou les quilles d'une embarcation étaient constituées de structures définitives et permanentes, c'est-à-dire assurant leur rôle de quille en permanence, quelles que soient les circonstances dans lesquelles se trouvait l'embarcation (embarcation à l'arrêt, à faible vitesse, ou à grande vitesse).Until now, the keel (s) of a boat were made up of permanent and permanent structures, that is to say ensuring their role of keel permanently, whatever the circumstances in which the boat was ( boat stationary, low speed, or high speed).

C'est ainsi que les quilles connues à ce jour pouvaient être

  • ― soit des quilles constituées par une structure rigide maintenue mécaniquement,
  • ― soit des quilles constituées par une structure souple maintenue tendue par des moyens mécaniques ou pneumatiques.
This is how the skittles known to date could be
  • - either keels constituted by a rigid structure mechanically maintained,
  • - either skittles constituted by a flexible structure held taut by mechanical or pneumatic means.

Outre le fait que les quilles selon l'art antérieur équipent les embarcations, à la construction, de façon définitive et permanente (ce qui constitue un inconvénient), ces quilles sont relativement fragiles, d'un coût non négligeable par rapport au coût total de l'embarcation, et, pour certains types de quilles, d'un montage délicat.In addition to the fact that the pins according to the prior art equip the boats, at construction, permanently and permanently (which constitutes a drawback), these pins are relatively fragile, of a non-negligible cost compared to the total cost of the boat, and, for certain types of keels, a delicate assembly.

La présente invention a pour but de remédier à l'ensemble de ces inconvénients en proposant une embarcation comportant au moins une quille dont l'efficacité peut varier en fonction de la vitesse de l'embarcation, dont l'existence matérielle est évolutive (c'est-à-dire que la quille n'est pas constituée par une structure définitive et permanente et que de ce fait elle peut assurer ou ne pas assurer un rôle de quille suivant les circonstances).The object of the present invention is to remedy all of these drawbacks by proposing a boat comprising at least one keel the efficiency of which can vary depending on the speed of the boat, the material existence of which is subject to change (it that is to say that the keel is not constituted by a permanent and permanent structure and that therefore it may or may not ensure a role of keel depending on the circumstances).

La présente invention a également pour but une embarcation à au moins une quille dont la caractéristique est d'être sensiblement moins fragile qu'une quille classique.The present invention also aims at a boat with at least one keel, the characteristic of which is to be substantially less fragile than a conventional keel.

La présente invention a aussi pour but une embarcation à au moins une quille dont la caractéristique est d'être d'un coût relatif (par rapport au coût total de l'embarcation) sensiblement moins élevé que celui d'une quille classique.The present invention also aims a boat with at least one keel whose characteristic is to be of a relative cost (compared to the total cost of the boat) significantly lower than that of a conventional keel.

La présente invention a encore pour but une embarcation à au moins une quille dont la caractéristique est d'être d'un montage plus facile que celui d'une quille classique.The present invention also aims at a boat with at least one keel, the characteristic of which is that it is easier to assemble than that of a conventional keel.

Selon l'invention, l'embarcation comporte au moins une quille essentiellement constituée par une capacité allongée formée en un matériau souple, déformable et étanche à l'eau, et elle est caractérisée par le fait que cette quille comporte au moins une ouverture d'admission d'eau ménagée dans la paroi de la capacité allongée la constituant, tournée vers la proue de l'embarcation et maintenue ouverte.According to the invention, the boat comprises at least one keel essentially constituted by an elongated capacity formed of a flexible, deformable and waterproof material, and it is characterized in that this keel comprises at least one opening. admission of water provided in the wall of the elongated capacity constituting it, facing the bow of the boat and kept open.

Grâce à cette disposition, la pression d'arrêt de l'eau règne dans la quille dès que l'embarcation est animée d'une vitesse vers l'avant, ladite quille étant alors au moins partiellement remplie d'eau.Thanks to this arrangement, the water stopping pressure reigns in the keel as soon as the boat is driven in forward speed, said keel then being at least partially filled with water.

De préférence, cette ouverture d'admission d'eau est située vers la partie arrière de la capacité allongée.Preferably, this water intake opening is located towards the rear part of the elongated capacity.

Selon une disposition avantageuse de l'invention, la capacité allongée est munie d'au moins un orifice d'évacuation d'air de dimensions très inférieures (dans des proportions d'environ 1 à 10) à celles de l'ouverture d'admission d'eau.According to an advantageous arrangement of the invention, the elongated capacity is provided with at least one air discharge orifice of dimensions much smaller (in proportions of about 1 to 10) than those of the intake opening of water.

De préférence, cet orifice d'évacuation d'air est situé à l'opposé de l'ouverture d'admission d'eau, c'est-à-dire que, dans le cas où ladite ouverture d'admission d'eau est située vers l'arrière de la capacité allongée, l'orifice d'évacuation d'air se trouve vers l'avant de la capacité allongée.Preferably, this air discharge orifice is situated opposite the water intake opening, that is to say that, in the case where said water intake opening is situated towards the rear of the elongated capacity, the air discharge orifice is situated towards the front of the capacity lying down.

Selon une autre disposition avantageuse de l'invention, des moyens de rétraction sont prévus pour que

  • ― lorsque la pression d'arrêt de l'eau est nulle ou négligeable, la capacité allongée occupe une position totalement ou partiellement escamotée dans l'embarcation,
  • ― et lorsque la pression d'arrêt de l'eau atteint une valeur critique suffisante, la capacité allongée occupe une position sortie pour laquelle elle peut jouer le rôle de quille.
According to another advantageous arrangement of the invention, retraction means are provided so that
  • - when the water stop pressure is zero or negligible, the elongated capacity occupies a fully or partially retracted position in the boat,
  • - and when the water stop pressure reaches a sufficient critical value, the elongated capacity occupies an extended position for which it can play the role of keel.

Selon encore une autre disposition de l'invention, il est prévu, à l'intérieur de la capacité allongée, une enceinte gonflée par un gaz à une pression telle que

  • ― lorsque la pression d'arrêt de l'eau est nulle ou négligeable, la quasi-totalité du volume de la capacité allongée est occupé par cette enceinte gonflée,
  • ― et, lorsque la pression d'arrêt de l'eau atteint une valeur critique suffisante, la moitié environ du volume de la capacité allongée est occupé par l'eau.
According to yet another arrangement of the invention, there is provided, inside the elongated capacity, an enclosure inflated by a gas at a pressure such that
  • - when the water stop pressure is zero or negligible, almost the entire volume of the elongated capacity is occupied by this inflated enclosure,
  • - And, when the water stop pressure reaches a sufficient critical value, approximately half of the volume of the elongated capacity is occupied by water.

Constructivement, l'ouverture d'admission d'eau peut avantageusement être agencée sous forme d'une écope maintenue ouverte en rigidifiant, au moins partiellement, autour de l'ouverture le matériau constitutif de la capacité allongée.Constructively, the water intake opening can advantageously be arranged in the form of a scoop kept open by stiffening, at least partially, around the opening the material constituting the elongated capacity.

L'invention consiste, mises à part les dispositions dont il vient d'être question, en certaines autres dispositions, qui s'utilisent de préférence en même temps, et dont il sera plus explicitement question ci-après.The invention consists, apart from the arrangements which have just been mentioned, in certain other arrangements, which are preferably used at the same time, and which will be more explicitly discussed below.

L'invention pourra de toute façon être bien comprise à l'aide du complément de description qui suit, ainsi que des dessins ci-annexés, lesquels complément et dessins sont relatifs à des réalisations préférées de l'invention, et ne comportent bien entendu aucun caractère limitatif:

  • ― la figure 1 de ces dessins, est une coupe longitudinale schématique d'une embarcation établie conformément à l'invention;
  • ― la figure 2 est une coupe selon la ligne II-II de la figure 1;
  • ― la figure 3 est une coupe selon la ligne III-III de la figure 1;
  • ― les figures 4 et 5 illustrent, par des coupes analogues à celle montrée à la figure 2, une disposition avantageuse de l'invention;
  • ― les figures 6 et 7 illustrent, par des coupes analogues à celle montrée à la figure 2, une autre disposition avantageuse de l'invention.
The invention can in any case be well understood with the aid of the additional description which follows, as well as the attached drawings, which supplement and drawings relate to preferred embodiments of the invention, and of course have no limiting character:
  • - Figure 1 of these drawings is a schematic longitudinal section of a boat established in accordance with the invention;
  • - Figure 2 is a section along line II-II of Figure 1;
  • - Figure 3 is a section along line III-III of Figure 1;
  • - Figures 4 and 5 illustrate, by sections similar to that shown in Figure 2, an advantageous arrangement of the invention;
  • - Figures 6 and 7 illustrate, by sections similar to that shown in Figure 2, another advantageous arrangement of the invention.

L'embarcation montrée sur la figure 1 comporte une coque 1 équipée de moyens de propulsion 2 (constitués par exemple par un moteur "in board" 2a et une transmission en Z 2b).The boat shown in FIG. 1 comprises a hull 1 fitted with propulsion means 2 (constituted for example by an "in board" motor 2 a and a Z-shaped transmission 2 b ).

L'embarcation peut posséder un fond plat 1a et être munie d'une quille désignée d'une façon générale par le chiffre de référence 3.The boat may have a flat bottom 1 a and be provided with a keel generally designated by the reference numeral 3.

Cette quille 3 est essentiellement constituée par une capacité allongée 4 formée en un matériau souple déformable et étanche à l'eau.This keel 3 is essentially constituted by an elongated capacity 4 formed from a flexible deformable and waterproof material.

Des moyens, désignés d'une façon générale par le chiffre de référence 5, sont prévus pour faire régner dans cette capacité allongée 4 la pression d'arrêt de l'eau dès que l'embarcation 1 est en mouvement (vers l'avant), ladite capacité allongée 4 se trouvant alors au moins partiellement remplie d'eau.Means, generally designated by the reference numeral 5, are provided to make the stop pressure of the water reign in this elongated capacity 4 as soon as the boat 1 is in motion (forward) , said elongated capacity 4 then being at least partially filled with water.

Comme montré sur les figures 1, 2 et 3, les moyens 5, pour faire régner dans la capacité allongée 4 la pression d'arrêt de l'eau dès que l'embarcation est en mouvement, sont constitués par une ouverture d'admission d'eau 6 ménagée dans la paroi de la capacité allongée 4, tournée vers la proue de l'embarcation, et maintenue ouverte.As shown in Figures 1, 2 and 3, the means 5, to make prevail in the elongated capacity 4 the water stop pressure as soon as the boat is in motion, are constituted by a water intake opening 6 formed in the wall of the elongated capacity 4, facing the bow of the boat, and kept open.

Cette ouverture d'admission d'eau 6 est de préférence située vers la partie arrière de la capacité allongée 4.This water intake opening 6 is preferably located towards the rear part of the elongated capacity 4.

Avantageusement, la capacité allongée 4 peut être munie d'au moins un orifice d'évacuation d'air 7 de dimensions très inférieures à celles de l'ouverture d'admission d'eau 6; cet orifice d'évacuation d'air 7 peut être disposé dans la partie de la capacité allongée 4 qui est située à l'opposé de l'ouverture d'admission d'eau 6.Advantageously, the elongated capacity 4 can be provided with at least one air discharge orifice 7 of dimensions much smaller than those of the water intake opening 6; this air evacuation orifice 7 can be arranged in the part of the elongated capacity 4 which is situated opposite the water intake opening 6.

Dans le cas où l'ouverture d'admission d'eau 6 est disposée vers la partie arrière de la capacité allongée 4, l'orifice d'évacuation d'air 7 se trouve vers la partie avant de la capacité allongée 4.In the case where the water intake opening 6 is arranged towards the rear part of the elongated capacity 4, the air evacuation orifice 7 is located towards the front part of the elongated capacity 4.

Selon une disposition de l'invention qui peut être intéressante lorsqu'on désire disposer d'une embarcation présentant une quille escamotée à l'arrêt et active en période de navigation, des moyens de rétraction sont prévus pour que,

  • ― lorsque la pression d'arrêt de l'eau est nulle ou négligeable, la capacité allongée 4 occupe une position totalement ou partiellement escamotée dans l'embarcation (figure 4),
  • ― et lorsque la pression d'arrêt de l'eau atteint une valeur critique suffisante, la capacité allongée 4 occupe une position sortie pour laquelle elle peut jouer le rôle de quille (figure 5).
According to a provision of the invention which may be advantageous when it is desired to have a boat having a retracted keel at a standstill and active during the navigation period, retraction means are provided so that,
  • - when the water stop pressure is zero or negligible, the elongated capacity 4 occupies a fully or partially retracted position in the boat (FIG. 4),
  • - And when the water stop pressure reaches a sufficient critical value, the elongated capacity 4 occupies an extended position for which it can play the role of keel (Figure 5).

Sur la figure 4 sur laquelle les mêmes chiffres de référence désignent les mêmes organes que sur la figure 2, on a représenté la quille dans sa position escamotée dans le fond 1a de l'embarcation qui, à cet effet, peut présenter un logement 1b adapté à abriter la quille dans cette position rétractée.In Figure 4 in which the same reference numerals designate the same members as in Figure 2, there is shown the keel in its retracted position in the bottom 1 a of the boat which, for this purpose, may have a housing 1 b adapted to house the keel in this retracted position.

Sur la figure 5 on a montré la quille dans sa position sortie pour laquelle elle fait saillie et, de ce fait, joue son rôle de quille.In Figure 5 we have shown the keel in its extended position for which it protrudes and, therefore, plays its role of keel.

En ce qui concerne les moyens de rétraction prévus, ils peuvent être de différentes natures et on peut avantageusement avoir recours à des moyens élastiques constitués par le matériau souple constitutif de la capacité allongée 4, matériau souple que l'on choisit alors parmi un matériau possédant des propriétés élastiques.As regards the retraction means provided, they can be of different natures and it is advantageous to have recourse to elastic means constituted by the flexible material constituting the elongated capacity 4, a flexible material which is then chosen from a material having elastic properties.

Sur les figures 6 et 7 sur lesquelles les mêmes chiffres de référence désignent les mêmes organes que sur la figure 2, on a illustré une disposition particulière de l'invention qui permet, même lorsque l'embarcation est à l'arrêt, de disposer d'une quille ayant une certaine rigidité.In FIGS. 6 and 7 in which the same reference numerals designate the same members as in FIG. 2, a particular arrangement of the invention has been illustrated which allows, even when the boat is stopped, to have available 'a keel with a certain rigidity.

Selon cette disposition, il est prévu, à l'intérieur de la capacité allongée 4, une enceinte 8 gonflée par un gaz à une pression telle que,

  • ― lorsque la pression d'arrêt de l'eau est nulle ou négligeable, la quasi-totalité du volume de la capacité allongée 4 est occupée par cette enceinte gonflée 8 (figure 6),
  • ― et lorsque la pression d'arrêt de l'eau atteint une valeur critique suffisante, la moitié environ du volume de la capacité allongée 4 est occupée par l'eau (figure 7).
According to this arrangement, there is provided, inside the elongated capacity 4, an enclosure 8 inflated by a gas at a pressure such that,
  • When the water shutdown pressure is zero or negligible, almost the entire volume of the elongated capacity 4 is occupied by this inflated enclosure 8 (FIG. 6),
  • - And when the water stop pressure reaches a sufficient critical value, about half of the volume of the elongated capacity 4 is occupied by water (Figure 7).

Dans la configuration illustrée sur la figure 6, la quille de l'embarcation présente une faible rigidité due uniquement à la pression de gaz qui règne dans l'enceinte 8.In the configuration illustrated in FIG. 6, the keel of the boat has a low rigidity due solely to the gas pressure which prevails in the enclosure 8.

Dans la configuration illustrée sur la figure 7, la quille présente une rigidité plus élevée, correspondant à la pression d'arrêt de l'eau qui est égale à la pression de gaz régnant dans l'enceinte 8, ladite enceinte 8 voyant donc son volume réduit à une plus faible valeur.In the configuration illustrated in FIG. 7, the keel has a higher rigidity, corresponding to the stopping pressure of the water which is equal to the gas pressure prevailing in the enclosure 8, said enclosure 8 therefore seeing its volume reduced to a lower value.

En ce qui concerne l'ouverture d'admission d'eau 6, elle peut avantageusement être agencée sous forme d'une écope maintenue ouverte en rigidifiant, au moins partiellement, autour de l'ouverture proprement dite 6 le matériau constitutif de la capacité allongée 4.As regards the water intake opening 6, it can advantageously be arranged in the form of a scoop kept open by stiffening, at least partially, around the opening proper 6 the material constituting the elongated capacity. 4.

Les applications de la présente invention sont multiples et, parmi celles qui paraissent les plus intéressantes, on peut citer les suivantes:

  • ― quille centrale d'une embarcation pneumatique de type "Zodiac Mark II" ou "Zodiac Mark III",
  • ― quille centrale et/ou boudins latéraux d'une embarcation pneumatique de type "Zodiac Futura",
  • ― constitution de bouchains sur des embarcations classiques.
The applications of the present invention are multiple and, among those which seem the most interesting, the following may be cited:
  • - center keel of a "Zodiac Mark II" or "Zodiac Mark III" type inflatable boat,
  • - central keel and / or side tubes of a "Zodiac Futura" type inflatable boat,
  • - constitution of chines on classic boats.

Il convient également de remarquer que, lorsque la quille selon la présente invention passe de sa configuration vide d'eau à sa configuration remplie d'eau, son poids augmente et son rôle de lest peut alors devenir appréciable. Il est alors avantageux de munir l'ouverture d'admission d'eau de moyens anti-retour évitant à l'eau contenue dans la capacité allongée de s'écouler par gravité.It should also be noted that, when the keel according to the present invention changes from its empty water configuration to its water filled configuration, its weight increases and its role as ballast can then become appreciable. It is then advantageous to provide the water intake opening with non-return means preventing the water contained in the elongated capacity from flowing by gravity.

On peut donc envisager d'appliquer l'invention à la constitution de quilles,

  • ― pour constituer une quille et un lest central dans le cas d'une embarcation monocoque,
  • ― pour constituer une quille ou un lest central et/ou une quille ou un lest latéral dans le cas d'une embarcation multicoque.
We can therefore consider applying the invention to the constitution of skittles,
  • - to constitute a central keel and ballast in the case of a monohull boat,
  • - to constitute a central keel or ballast and / or a lateral keel or ballast in the case of a multihull boat.

Claims (8)

1. Craft comprising a least one keel (3), essentially constituted by an elongated capacity (4) formed out of a flexible or resilient material, which is distortable and watertight, characterized by the fact that this keel (3) incorporates at least one water inlet opening (6) provided in the wall of the elongated capacity (4) constituting said keel (3), oriented towards the bow of the craft and maintained in the open condition, whereby the water shut-off pressure prevails in the keel as soon as the craft is propelled by speed in the forward direction, said keel being then at least partially filled with water.
2. Craft according to claim 1, characterized by the fact that the water inlet opening (6) is located towards the rear part of the elongated capacity (4).
3. Craft according to claim 1 or 2, characterized by the fact that the water inlet opening is provided with reverse-lock means preventing the water contained in the elongated capacity from flowing away due to gravity.
4. Craft according to one of claims 1 to 3, characterized by the fact that the elongated capacity (4) is provided with at least an air removal orifice (7) having dimensions substantially lower than the ones of the water inlet opening.
5. Craft according to claim 4, characterized by the fact that the air removal orifice (7) is located, in the elongated capacity (4) opposite the water inlet opening (6).
6. Craft according to one of claims 1 to 5, characterized by the fact that retracting means are provided in such a way that
― whenever the water shut-off pressure is nil or negligible, the elongated capacity (4) occupies a totally or partially retracted position in the craft,
― and whenever the water shut-off pressure reaches a sufficient critical value, the elongated capacity (4) occupies an extented position in which it can ensure its function as a keel.
7. Craft according to one of claims 1 to 6, characterized by the fact that there is provided, inside the elongated capacity (4) an inflated enclosure (8) occupied by a gas under a pressure such that
― whenever the water shut-off pressure is nil or negligible, the volume of the elongated capacity (4) is almost completely occupied by this inflated enclosure (8),
― whenever the water shut-off pressure reaches a sufficient critical value, the volume of the elongated capacity is almost completely occupied by water.
8. Craft according to one of claims 1 to 7, characterized by the fact that the water inlet opening (6) is arranged in the form of a scoop which is maintained in the open condition by stiffening, at least partially around the opening the material constituting the elongated capacity (4).
EP89401770A 1988-06-29 1989-06-22 Boat keels Expired - Lifetime EP0349394B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89401770T ATE72183T1 (en) 1988-06-29 1989-06-22 BOAT SKINS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8808758 1988-06-29
FR8808758A FR2633581B1 (en) 1988-06-29 1988-06-29 IMPROVEMENTS TO BOWLING FOR BOATS

Publications (2)

Publication Number Publication Date
EP0349394A1 EP0349394A1 (en) 1990-01-03
EP0349394B1 true EP0349394B1 (en) 1992-01-29

Family

ID=9367863

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89401770A Expired - Lifetime EP0349394B1 (en) 1988-06-29 1989-06-22 Boat keels

Country Status (8)

Country Link
US (1) US4993342A (en)
EP (1) EP0349394B1 (en)
AT (1) ATE72183T1 (en)
AU (1) AU616280B2 (en)
CA (1) CA1315609C (en)
DE (1) DE68900788D1 (en)
ES (1) ES2029124T3 (en)
FR (1) FR2633581B1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5228407A (en) * 1991-02-01 1993-07-20 Barry Douglas Enterprises Ltd. Rigid inflatable boat
US5299522A (en) * 1993-03-09 1994-04-05 Dixon Jr Henry R Inflatable acoustic buffer for boat hulls
US6325009B1 (en) 2000-05-31 2001-12-04 Shoalsailer, Llc Sailboat for sailing in shallow water
FR2966798B1 (en) 2010-10-29 2013-08-30 Zodiac Solas DEVICE FOR STABILIZING AN INFLATABLE STRUCTURE

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE159827C (en) *
US2370069A (en) * 1943-07-23 1945-02-20 Us Rubber Co Inflatable boat
FR1428600A (en) * 1965-01-06 1966-02-18 Perfected craft
US3361104A (en) * 1966-02-28 1968-01-02 John P. Glass Boat hull and rail
US3559222A (en) * 1968-10-28 1971-02-02 Nolte Albert C Jr Boat with adjustable bottom
US3503358A (en) * 1968-10-29 1970-03-31 Carl Moesly Self-stabilizing boat hull
CH616373A5 (en) * 1977-08-25 1980-03-31 Francisco Fargas Rottier Boat
EP0009510A1 (en) * 1978-10-02 1980-04-16 H.H.I. Messegesellschaft für Handwerk, Handel und Industrie mbH &amp; Co. Textile water keel for sporting and inflatable boats
IT7921791V0 (en) * 1979-06-11 1979-06-11 Marine Union Srl PNEUMATIC KEEL FOR PNEUMATIC BOATS.
JPS61196884A (en) * 1985-02-26 1986-09-01 Soichi Iizuka Stable high speed type ship hull structure

Also Published As

Publication number Publication date
CA1315609C (en) 1993-04-06
FR2633581A1 (en) 1990-01-05
EP0349394A1 (en) 1990-01-03
DE68900788D1 (en) 1992-03-12
AU616280B2 (en) 1991-10-24
FR2633581B1 (en) 1994-02-04
ATE72183T1 (en) 1992-02-15
ES2029124T3 (en) 1992-07-16
AU3709089A (en) 1990-01-04
US4993342A (en) 1991-02-19

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