Inflatable hull and buoyant vehicle, in particular a dinghy

Abstract

An inflatable hull including at least one air casing that has two walls placed one over the other. The walls each include a fabric sheet, are connected therebetween by a plurality of connecting wires distributed over the entire surface of the sheets while forming a structure suitable for being inflated to a pressure capable of rigidifying the structure, and are capable of ensuring the buoyancy of the hull separately from any reported buoyancy element. The casing has a first transversely cross-sectional curvature and a second longitudinally cross-sectional curvature that is present over at least the front portion of the casing. One of the walls corresponds to the inside of the curvature, and the other of the walls corresponds to the outside of the curvature. The casing has at least one clip set up such as to form a stem.

Claims

1. A floating vessel comprising at least one inflatable hull incorporating at least one pneumatic envelope with two superimposed walls, wherein said walls each incorporating a layer of textile and being interconnected by a multitude of joining threads spread over the entire surface area of said layers, forming a structure suitable to be inflated to a pressure that can instill rigidity in said structure, and that can ensure a buoyancy of said hull, independently of any added buoyancy component; wherein said envelope has a first curvature in a transversal cross-section and a second curvature in at least its front part in a longitudinal cross-section forming a bow of the inflatable hull; wherein one of said walls corresponds with an interior side of said curvature of the bow, and the other of said walls corresponds to an exterior side of said curvature of the bow; and wherein said envelope has at least one tuck worked so as to form the bow; wherein the floating vessel incorporates a first aperture for passage of a centerboard extending over at least a portion of the length of said pneumatic envelope, and traversing said inflatable hull; wherein the floating vessel includes at least one part forming a centerboard well designed to be received in said first aperture traversing said hull; and equipped with a propulsion system.

2. The floating vessel according to claim 1, wherein the propulsion system comprises a mast and a sail.

3. The floating vessel according to claim 2, wherein said part forming a centerboard well has a bend of suitable size to allow the insertion of said part into the first traversing aperture in the deflated state of said hull, and hold said part in said first aperture in the inflated state of said hull.

4. The floating vessel according to claim 2, wherein the floating vessel incorporates a central part incorporating said part forming a centerboard well and a part forming a mast foundation base.

5. The floating vessel according to claim 4, wherein said inflatable hull and said central part incorporate at least one bearing part for each side of the inflatable hull, with said bearing parts being designed to integrate said central part with said inflatable hull and distribute the stresses from the mast and the centerboard on the inflatable hull.

6. The floating vessel according to claim 1, wherein said hull includes lateral rings and at least one central ring fixed respectively on the opposing sides and at a center of a rear part of said inflatable hull, with said vessel incorporating at least of rudder mounting incorporating at least two lateral branches and one lower branch designed to be received respectively in said lateral and central rings, with said rudder mounting being formed to bear on and be integral with said inflatable hull in the inflated state.

7. The floating vessel according to claim 5, wherein wings designed to be fixed on each side of the floating vessel on one of said branches of the rudder mounting and on one exterior extremity of said bearing parts, said wings forming, with the branches and said bearing parts, a closed rigidifying structure on each side of said hull.

8. An inflatable hull incorporating at least one pneumatic envelope with two superimposed walls; wherein said walls each incorporating a layer of textile and being interconnected by a multitude of joining threads spread over the entire surface area of said layers, forming a structure suitable to be inflated to a pressure that can instill rigidity in said structure, and that can ensure a buoyancy of said hull, independently of any added buoyancy component; wherein said envelope has a first curvature in a transversal cross-section and a second curvature in at least its front part in a longitudinal cross-section forming a bow of the inflatable hull; wherein one of said walls corresponds with an interior side of said first and second curvature of the bow, and the other of said walls corresponds to an exterior side of said first and second curvature of the bow; wherein said envelope has at least one tuck worked so as to form the bow; at least one impermeable interior strip fixed impermeably between said walls to form the lateral wall of at least one aperture traversingat least partiallysaid inflatable hull.

9. The inflatable hull according to claim 8, wherein the inflatable hull incorporates a first aperture for passage of a centerboard extending over at least a portion of the length of said pneumatic envelope, and traversing said inflatable hull.

10. The inflatable hull according to claim 8, wherein the inflatable hull includes a second aperture that is not fully penetrating, for passage for a mast foundation base and extending partially through said inflatable hull.

11. The inflatable hull according to claim 8, wherein said tuck incorporates a fold formed in said wall positioned on the interior side of said first and second curvature.

12. The inflatable hull according to claim 8, wherein said tuck incorporates a fold formed in said wall located on the exterior side of said first and second curvature.

13. The inflatable hull according to claim 8, wherein the inflatable hull incorporates a junction piece for said fold.

14. The inflatable hull according to claim 8, wherein said tuck is produced by cutouts made in at least one portion of said inflatable hull, at least in said wall positioned on the interior side of said first and second curvature of said envelope, with said cutouts being fixed edge-to-edge to form said bow.

15. The inflatable hull according to claim 14, wherein said cutouts being made in each of the superimposed walls of said envelope, with said cutouts being fixed edge-to-edge to form said bow.

16. The inflatable hull according to claim 15, wherein the inflatable hull incorporates impermeable joining parts for said edge-to-edge fixation of said cutouts.

17. The inflatable hull according to claim 8, wherein said envelope incorporates, an at least one part of its periphery, a lateral peripheral strip with a form establishing said curvature in the longitudinal cross-section of said envelope.

18. The inflatable hull according to claim 8, wherein said envelope incorporatesover at least part of its peripherya transversal peripheral strip having a form that establishes said curvature in the transversal cross-section of said envelope.

19. The inflatable hull according to claim 8, wherein the inflatable hull incorporates at least one impermeable interior strip positioned in a median longitudinal plane between said walls to impermeably partition said pneumatic envelope into one starboard part and one port part that are inflatable and deflatable independently of each other.

20. An inflatable hull incorporating at least one pneumatic envelope with two superimposed walls; wherein said walls each incorporating a layer of textile and being interconnected by a multitude of joining threads spread over the entire surface area of said layers, forming a structure suitable to be inflated to a pressure that can instill rigidity in said structure, and that can ensure a buoyancy of said hull, independently of any added buoyancy component; wherein said envelope has a first curvature in a transversal cross-section and a second curvature in at least its front part in a longitudinal cross-section; wherein one of said walls corresponds with an interior side of said first and second curvature, and the other of said walls corresponds to an exterior side of said first and second curvature; wherein said envelope has at least one tuck worked so as to form a bow; and wherein a first longitudinal fold over a front part of the upper wall, and a second longitudinal fold over a front part of the lower wall, is created and each fold is fixed by a junction piece.

21. An inflatable hull incorporating at least one pneumatic envelope with two superimposed walls; wherein said walls each incorporating a layer of textile and being interconnected by a multitude of joining threads spread over the entire surface area of said layers, forming a structure suitable to be inflated to a pressure that can instill rigidity in said structure, and that can ensure a buoyancy of said hull, independently of any added buoyancy component; wherein said envelope has a first curvature in a transversal cross-section and a second curvature in at least its front part in a longitudinal cross-section; wherein one of said walls corresponds with an interior side of said first and second curvature, and the other of said walls corresponds to an exterior side of said first and second curvature; wherein said envelope has at least one tuck worked so as to form a bow; and wherein the upper wall hasat the fronta first cutout that is essentially a V-shape that is open towards the front, and the lower wall hasat the fronta second cutout that is essentially a V-shape open towards the front, these cutouts being fixed edge-to-edge in the median plane of the hull by means of impermeable strips fixed by neoprene glue to form the tuck, such that the bow has a curvature in the transversal cross-section and the longitudinal cross-section.

22. An inflatable hull incorporating at least one pneumatic envelope with two superimposed walls, an upper wall forming an interior wall of the hull and a lower wall forming an exterior wall of the hull; wherein said walls each incorporating a layer of textile and being interconnected by a multitude of joining threads spread over the entire surface area of said layers; and at least one impermeable peripheral lateral strip glued with the upper wall and the lower wall to form a structure suitable to be inflated to a pressure that can instill rigidity in said structure, and that can ensure a buoyancy of said hull, independently of any added buoyancy component; wherein said envelope has a first curvature in a transversal cross-section and a second curvature in at least its front part in a longitudinal cross-section; wherein said envelope has at least one tuck worked so as to form a bow; and wherein the upper wall hasat a fronta first cutout that is essentially a V-shape that is open towards the front, while the lower wall hasat the fronta second cutout that is essentially a V-shape open towards the front, these cutouts being fixed edge-to-edge in a median plane of the hull by means of impermeable strips fixed by means of neoprene glue to form the tuck, such that, with the at least impermeable lateral peripheral strip, the bow has a curvature in the transversal cross-section and the longitudinal cross-section.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Other characteristics and advantages of the invention will come to the fore on reading the description that will be presented as preferred forms of implementation of an inflatable hull and a floating vessel according to the invention, the which description is provided as a non-limitative example, making reference to the appended drawings, in which:

(2) FIG. 1 is a view in perspective of the inflatable hull according to the invention, in the inflated state;

(3) FIG. 2 is a schematic view in partial cross-section of the pneumatic envelope of the inflatable hull, showing the structure of the dual-wall textile;

(4) FIG. 3 is a side view of a first variant of the inflatable hull according to the invention, in the inflated state;

(5) FIG. 4 is a side view of another variant of the inflatable hull according to the invention, in the inflated state;

(6) FIG. 5 is a back view of the inflatable hull in the inflated state, in the implementation variant shown in FIG. 3, which has a U-shaped transversal cross-section;

(7) FIG. 6 is a back view of the inflatable hull in the inflated state, in the implementation variant shown in FIG. 4, which has a V-shaped transversal cross-section;

(8) FIG. 7 is a view in perspective of several parts composing the pneumatic envelope of the inflatable hull according to the first variant of implementation presented in FIGS. 3 and 5;

(9) FIG. 8 is an exploded top view showing several parts positioned flat, composing the inflatable hull's pneumatic envelope, as illustrated in FIGS. 3, 5 and 7;

(10) FIG. 9A is a transversal cross-section view of the front of the inflatable hull according to the invention, produced with a longitudinal tuck without cutout;

(11) FIG. 9B is a transversal cross-section view of the hull, illustrating a variant of implementation with two longitudinal tucks without cutout;

(12) FIG. 9C is a longitudinal cross-section view illustrating another variant of implementation, incorporating a transversal tuck without cutout;

(13) FIG. 10 is an exploded view in perspective of several parts composing the inflatable hull's pneumatic envelope according to the second variant of implementation shown in FIGS. 4 and 6;

(14) FIG. 11 is an exploded top view showing several parts positioned flat, composing the pneumatic envelope of the inflatable hull illustrated in FIGS. 4, 6 and 10;

(15) FIG. 12 is a view in perspective of the inflatable hull and a portion of the equipment parts of centerboarder type for a floating vessel powered by sail as according to the invention;

(16) FIG. 13 is a view in perspective of the inflatable hull and a portion of the equipment parts of centerboarder type for a floating vessel powered by sail as according to the invention;

(17) FIG. 14 is a transversal cross-section of an advantageous method for fixing the centerboard well onto the inflatable hull as in FIG. 12;

(18) FIG. 15 is a transversal cross-section of an advantageous method of securing the mast foundation base onto the inflatable hull as in FIG. 12;

(19) FIG. 16 is a view in perspective of an advantageous method for fixing bearing parts designed to distribute the stresses of the mast and the centerboard on the inflatable hull;

(20) FIG. 17 shows a view in perspective of an advantageous method of securing a rudder mounting, the rudder, and a mainsheet on the inflatable hull;

(21) FIG. 18 is a top view of the floating vessel, equipped with wings and return straps;

(22) FIG. 19 shows a back view of the floating vessel illustrated in FIG. 18, showing the position of a crew member pressing against the port wing;

(23) FIG. 20 is a partial view in perspective and in cross-section of the inflatable hull according to the invention, in accordance with the variant of implementation in FIGS. 3, 5, 7 and 8, advantageously equipped with apertures formed by two interior strips.

(24) FIG. 21 is a perspective and partial cross-section view of the inflatable hull according to the invention, in accordance with the variant of implementation in FIGS. 3, 5, 7 and 8, advantageously equipped with apertures formed by an interior strip.

DETAILED DESCRIPTION OF THE INVENTION

(25) If one refers to FIG. 1, in a preferred form of implementation, the inflatable hull (1) is composed of at least one pneumatic envelope (2) and is advantageously equipped with an inflation and deflation valve (3). The inflatable hull is designed to be rolled or folded. It is light and has very small outside dimensions, which facilitates its storage, handling and transportation.

(26) In use, the inflatable hull (1) withstands the forces applied by water on its submersed parts, the stresses applied by the propulsion system fixed on the inflatable hull (1), and the weight of one or more people. It is therefore essential that the inflatable hull (1) be rigid during navigation. To achieve this end, the pneumatic envelope (2) of the inflatable hull (1) is made of dual-wall textile, as can be more clearly seen in FIG. 2. Dual-wall textiles are known, moreover, and their production process will not be described herein. If one refers to FIG. 2, the dual-wall textile takes the form of two walls, namely an upper wall (2c) that constitutes the interior wall of the hull, and one lower wall (2d) that constitutes the exterior wall of the hull. These two walls, (2c) and (2d), respectively consist of two textile layers, and are interconnected by a multitude of joining threads (2f). The impermeability of the pneumatic envelope (2) is provided around the edge of the dual-wall textile (2c, 2d, 2f), by an impermeable peripheral strip (2g, 2h) which is fixed by any appropriate means and, preferably by means of neoprene glue over the entire periphery of the two walls, (2c) and (2d), such as is illustrated more clearly in FIG. 1. The two textile walls (2c and 2d) are, moreover, rendered impermeable by any appropriate means, and preferably by means of a rendering of neoprene or any other complex.

(27) In a precise example of implementation that is non-limitative, the two walls (2c and 2d) consist of textile layers of which the threads are polyamide. The joining threads (2f) between the walls (2c) and (2d) are made of polyester. They are regularly distributed over the entire surface of the inflatable hull (1), at a density of around 15 threads per square centimeter. The walls 2c and 2d are coated with neoprene on their exterior face. The peripheral strip (2g, 2h) is composed of textile layers of which the threads are made of polyamide, and is rendered with neoprene on its two faces. In a more-general manner, the thickness of the dual-wall textile (2c, 2d, 2f) of the inflatable hull (1) in the inflated state is 200 mm for rigidity and buoyancy reasons. This value is non-limitative, and could be greater or smaller. It is up to an appropriately knowledgeable professional to establish this thickness E as a function of the dimensions of the inflatable hull (1), and as a function of the weights and stresses it will have to withstand. In a precise example of implementation, which is provided for information only, the inflatable hull (1) measures 3,200 mm in length and 1,200 mm at the main beam. To obtain a sufficient rigidity, the inflatable hull (1) is inflated to a pressure of around 500 millibars, or more. The rigidity of the hull is all the greater when the inflation pressure is high. The inflation pressure is limited by the capacity of the material of which the hull is made, and by the ability of the bonded or welded connections to withstand the mechanical stresses generated by the inflation.

(28) According to one preferred mode of implementation, for hydrodynamic performance reasons, the inflatable hull (1) according to the invention is streamlined towards the front, as shown in FIG. 1, and has a prow or a bow E of curved form in the longitudinal cross-section, as illustrated in FIG. 3, and a non-flat transversal cross-section of generally U-shape, is illustrated in FIG. 5; within the context of this document, the prow or bow is deemed to be the front part of the bottom.

(29) All illustrated in FIGS. 1, 3 and 5, the inflatable hull (1) is composed of a starboard part (2a) and a port part (2b) bounded on either side by a median longitudinal plane (2x) parallel to a longitudinal axis D. The two parts (2a) and (2b) of the hull are preferably symmetrical in relation to the median plane. (2x).

(30) According to one preferred form of implementation in FIGS. 7 and 8, the upper wall (2c) and the lower wall (2d) of the pneumatic envelope (2) incorporates a tuck that allows one to implement, by means of the dual-wall textile (2c, 2d, 2f) a bow E with a curvature in both the longitudinal and the transversal cross-section. In the context of this document, the term curvature meansin this casea non-flat bottom profile, which can be continuous or non-continuousfor example, a V-shaped or U-shaped form in transversal cross-section.

(31) Thus, the wall (2c) hasat the fronta cutout (2k) that is essentially a V-shape that is open towards the front, while the wall (2d) hasat the fronta cutout (2i) that is essentially a V-shape open towards the front. These cutouts are produced in the same manner as when the cutouts (2l) are fixed edge-to-edge in the median plane (2x), thus procuring a bow E that has curvature in the transversal cross-section and the longitudinal cross-section. Advantageously, the edge-to-edge assembly of the cutout (2i) and the cutout (2k) is done by means of junction pieces (2l) that arein this particular caseimpermeable strips fixed by any appropriate meansand preferably by means of neoprene glue.

(32) As a variant, only the interior wall (2c) has, at the front, a cutout (2k) that is essentially V-shaped and open towards the front, of which the edges are assembled, for example, by means of a junction piece (2l).

(33) Of course, according to the invention, it is possible to produce the tuck intended to form the bow without making a cutout for example, by creating a longitudinal fold (2p) over a front part of the upper wall (2c), and over a front part of the lower wall (2d), and by fixing each fold (2p) for example, by means of a junction piece (21), as can be seen more clearly in FIG. 9A.

(34) According to a variant of implementation illustrated in FIG. 9B, the wall (2c) has two longitudinal tucks either side of the median longitudinal plane (2x), by means of folds (2p) that extend over at least a part of the front length of the inflatable hull. Such a design with two longitudinal folds procures a more-pronounced curvature in the transversal cross-section of the dual-wall textile (2c, 2d, 2f) forming the envelope, while avoiding any roll edges forming in the interior wall (2c).

(35) According to a variant of implementation illustrated in FIG. 9C, the wall (2c) has at least two transversal tucks (2q) in, respectively, the port part (2b) and the starboard part (2a), extending from the lateral edge of the hull. Such a design with two folds procures a more-pronounced curvature in the longitudinal cross-section of the dual-wall textile (2c, 2d, 2f) forming the envelope, while preventing any roll edges forming in the interior wall (2c).

(36) According to a preferred form of implementation illustrated in FIGS. 7 and 8, the pneumatic envelope (2) of the inflatable hull (1) has a longitudinal cross-section that is curved at the front. One of the solutions for procuring this curvature in the longitudinal cross-section is to constrain the dual-wall textile (2c, 2d, 2f) by means of the impermeable lateral peripheral strip (2h), of which the cutout matches the desired shape of the longitudinal cross-section. During inflation, the starboard lateral peripheral strip (2h) establishes the longitudinal cross-section of the port part (2b), and the starboard lateral peripheral strip (2h) establishes the longitudinal cross-section of the starboard part (2a).

(37) In the same manner, the form of the transversal cross-section of the pneumatic envelope (2) of the inflatable hull (1) is established by the form of the transversal peripheral strip (2g) located to the rear of the hull, of which the cutout matches the desired form of the transversal cross-section.

(38) Although this is preferable, the pneumatic envelope (2) according to the invention does not necessarily incorporate a tuck, a lateral peripheral strip (2h) and a transversal peripheral strip (2g), but canfor examplehave only one tuck and one lateral peripheral strip (2h), and incorporate walls (2c) and (2d) that are glued together at the transom.

(39) Of course, the method of manufacture of the pneumatic envelope (2) according to the invention enables any desirable shape of the bow E to be endowed, at the front part of the inflatable hull (1), in both the longitudinal cross-section and the transversal cross-section.

(40) It should be noted that, depending on the manufacture, the upper wall (2c) of the dual-wall textile (2c, 2d, 2f) of the pneumatic envelope (2), or of any other hull according to the invention, can have a different dimension than the lower wall (2d).

(41) For example, according to the variant of implementation in FIGS. 7 and 8, the upper wall (2c) located on the interior wall (2c) of the hull having this curvature is of smaller dimensions than the lower wall (2d) located on the exterior of the curvature in the pneumatic envelope (2), namely the exterior wall (2d) of the hull having this curvature. This dimension can vary in the longitudinal direction or the transversal direction, or in both directions. The difference in dimension(s) between the lower wall (2d) and the upper wall (2c) contributes to procuring the longitudinal and transversal curvature in the dual-wall textile (2c, 2d, 2f).

(42) According to a second variant in implementation illustrated in FIGS. 4, 6, 10 and 11, the inflatable hull (1) according to the invention is manufactured in the same manner as the inflatable hull (1), with the difference lying in the fact that the cutouts (2i) and (2k) that procure the tuck extend over the entire length of the dual-wall textile (2c, 2d, 2f). Thus, the lateral peripheral strips (2h) can establish the form of the longitudinal cross-section over its entire length, and not just at the bow E.

(43) In this particular case, the longitudinal cross-section of the inflatable hull (1) has a continuous curvature, and the transversal cross-section has an essentially V-shaped form. Of course, the method of production of the pneumatic envelope (2) according to the invention enables one to procure any desirable form in the entire longitudinal cross-section and the bow E, and in the transversal cross-section of the pneumatic envelope (2) of the inflatable hull (1).

(44) In order to conserve one or more safety buoyancy chambers in the event of an air leak, the pneumatic envelope (2) is partitioned into two parts, corresponding to the starboard (2a) and port (2b) parts. Advantageously, the impermeability of each of the starboard (2a) and port (2b) parts of the inflatable hull's (1) pneumatic envelope (2) is produced by means of two impermeable interior strips (2m) fixed in an impermeable manner by any appropriate means on each of the starboard (2a) and port (2b) partspreferably by means of a neoprene gluesuch that the starboard (2a) part and port (2b) part, being each fitted with a valve (3), inflate and deflate independently. Just like the lateral peripheral strips (2h), the form of the strips (2m) establishes the longitudinal cross-section of the pneumatic envelope (2) of the inflatable hull (1). The junction piece (2l) advantageously extends onto the transom and onto the front of the inflatable hull (1), so as to assemble the starboard (2a) and port (2b) parts. Of course, it is possible to construct a partition between the parts (2a) and (2b) by means of a single strip (2m).

(45) Where appropriate, for the same reasons of safety, it is possible to partition the pneumatic envelope (2) and the pneumatic envelope (2) into several independent compartments, notably via internal partition walls.

(46) The inflatable hull (1) and the inflatable hull (1) are usable with any means of propulsionfor example, with a motor, oars, a sail, etc., and more besides, in a non-limitative manner.

(47) According to one preferred form of implementation of FIGS. 12 and 13, the floating vessel that is referred to overall by the numeric reference (21) incorporates an inflatable hull (1) according to the invention, equipped with various parts of centerboarder type for navigation by sail, namely, a central part (6), a centerboard (7), bearing parts (8), a mast (10), a sail (11), a Cunningham (12), a batten (13), a mainsheet (14), a rudder (15), a rudder mounting (16), and a pin (18).

(48) According to FIG. 12, in a preferred form of implementation, the apertures (4a) and (4b) located advantageously in the median longitudinal plane (2x) traverse the inflatable hull (1) in an essentially vertical manner. The lateral wall of these apertures (4a) and (4b) are composed of the two impermeable interior strips (2m). The junction piece (2l) is cut in a manner so that the aperture (4a) has an opening in the upper part and an opening in the lower part, and so that the aperture (4b) has a single opening in the upper part, with the mast foundation base not requiringin this particular caseto traverse the inflatable hull (1) from one side to the other. Advantageously, the openings of the apertures (4a) and (4b) are consolidated by reinforcements (5a) and (5b) fixed on their periphery, and implemented by any appropriate means, and notably by means of textile pieces rendered with neoprene, fixed with a neoprene glue.

(49) Advantageously, the aperture (4a) has an extended form. In accordance with FIG. 14, the centerboard well (6a) which is a rigid chamber of dimensions considerably smaller than the aperture (4a) in the horizontal plane, inserts into the aperture (4a) of the inflatable hull (1) in the deflated state, and traverses the inflatable hull (1). The centerboard well (6a) hasnon-limitativelytwo bends or edges (6c) in its lower part. When the inflatable hull (1) is inflated to an adequate pressure, the centerboard well (6a) is maintained firmly in the longitudinal, transversal and vertical axes, and the bends (6c) prevent the extraction of the centerboard well (6a) out of the aperture (4a). The centerboard well (6a) allows one to freely insert or remove the centerboard (7), while preventing it from being pinched by the interior strips (2m). It is up to an appropriately-knowledgeable professional to judiciously establish the location of the centerboard well (6a) and, therefore, the aperture (4a).

(50) Advantageously, the aperture (4b) is circular. If one refers to FIG. 15, the mast foundation base (6b)which is a rigid tube of a diameter considerably smaller than the aperture (4b), is inserted into the aperture (4b) of the inflatable hull (1) in the deflated state, and partially traverses the inflatable hull (1). The mast foundation base (6b) is thus maintained firmly in the longitudinal and transversal cross-sections. It is up to an appropriately-knowledgeable professional to judiciously establish the location of the mast foundation base (6b) and, therefore, the aperture 4b. Within the scope of the invention, although that is preferable, the mast foundation base (6b) does not necessarily insert into an aperture of the inflatable hull (1). Thus, as a variant, the mast foundation base (6b) integral with the central part (6) incorporating the centerboard well is simply bearing against the interior wall (2c), with the envelope being bereft of the aperture (4b).

(51) In a preferred form of implementation, the mast foundation base (6b) and the centerboard well (6a) belong to the same rigid central part (6). This central part (6) bears all the forces exerted by water on the centerboard (7), and by the wind on the sail (11), which itself is borne by the mast (10). In accordance with FIG. 16, two bearing parts (8) optimize the transmission of these forceswhich are mainly transversalby bearing on the inflatable hull (1), and robustly maintain the front part of the central part (6), and, thus, the mast foundation base (6b) against the inflatable hull (1), preventing the extraction of the mast foundation base (6b) from the aperture (4b). Advantageously, the two bearing parts (8) are tubes made from a rigid material that insert into rings (9a, 9b) that are advantageously straps adjusted to the dimension of the bearing parts (8) and fixed by gluing onto the inflatable hull (1). In a preferred form of implementation, the central part (6) includes sleeves or tenons (6d) that are rigid tubes into which the bearing parts (8) insert. Advantageously, the sleeves or tenons (6d), which are means of fixing the bearing parts (8) on the central part (6), are located to the front or to the rear on the central part (6). The assembly is maintained in position by means of textile folds (9c) fitted with auto-gripping strips. Obviously, the rings (9a) and (9b) can be flexible, semi-rigid or rigid, andlike the sleeves (6d) and the textile folds (9c)can be replaced by any equivalent means of fixation and, notably, by mechanical attachment systems. The bearing parts (8) preferably marry the form of the inflatable hull (1) to provide a large bearing surface. The bearing parts (8) advantageously form an angle towards the rear of the inflatable hull (1) to support, with the central part (6)the transversal stresses of the mast and the centerboard, and the stresses from the mast towards the rear of the floating vessel (21). Consequently, a sail surface area similar to that of a hard-material centerboarder can be fitted to the floating vessel (21), namely, in this specific example, a non-limitative sail surface area of 5 m2.

(52) If one refers to FIG. 17, in a precise example of implementation, the floating vessel (22) is fitted with a rudder mounting (16) composed of tubes formed and assembled so as to marry the shape of the rear of the inflatable hull (1), with the ensemble having two lateral branches (16a) and one lower branch (16b). In a preferred implementation, rings (17a) are fixed to the left and right of the top part of the transom of the inflatable hull (1), and a ring (17b) is secured to the transom of the inflatable hull (1) in the middle of the vertical plane and the middle of the horizontal plane. Advantageously, these rings (17a) and (17b) are adjusted respectively to the dimension of the lateral branches (16a) and the lower branch (16b), and are straps fixed by gluing onto the inflatable hull (1). The lateral branches (16a) are slid into the rings (17a) and the lower branch (16b) is slid into the ring (17b) when the inflatable hull (1) is in the deflated state and, therefore, when it is supple. When the inflatable hull (1) is in the inflated state, its rigidity prevents the extraction of the rudder mounting (16) which, maintained by the rings (17a) and (17b) bear on the inflatable hull (1) at 3 places at least. Obviously, the rings (17a) and (17b) could be supple, semi-rigid or rigid, and they could be replaced by any equivalent means of fixationnotably, by mechanical attachment systems. Moreover, the rings (17a) and (17b) can be fixed anywhere on the transom of the inflatable hull, provided that they are located at a sufficient distance from each other, or provided that there is a sufficient number of them to effectively immobilize the rudder mounting (16) on the inflatable hull (1).

(53) According to a preferred implementation illustrated in FIG. 17, the rudder (15) is fixed onto the rudder mounting (16) by means of the rudder head (15b). The rudder head (15b) has, in a precise example of implementation, two apertures positioned above and below the lower branch (16b) that advantageously fulfill the role of gudgeon. The rudder (15) is maintained in position by a pin (18) that inserts onto the apertures of the rudder head (15b) and the lower branch (16b) thus positioned.

(54) Mounted above the rudder head (15a) is a bar (15c) that allows steering of the floating vessel (21). This bar (15c) is fixed by a pin (15e) to the rudder head (15a) and around which it pivots so as to reduce the overall dimensions of the rudder (15) outside navigation.

(55) The mainsheet (14) is composed of a tackle (14a) and a moise (14b). The ends of the moise (14b) are each knotted onto each of the extremities of the branches (16a). The upper extremity of the tackle for the mainsheet (14) attaches to an eye (11e) illustrated in FIG. 13.

(56) If one refers to FIG. 13, in a precise example of implementation, the mast (10) is composed of 4 pieces that are assembled via a system of sleeves. Once assembled, it is slid into the mast foundation base (11a) as one can see for the known rigging of a sailboard. In this precise and non-limitative example, a rigid or semi-rigid batten (13) can be slid into a batten pocket (11a) provided on the edge of the sail (11) and locked by means of a strap fitted with an auto-gripping strip (11c). The mast (10) is slid into the mast foundation base (6b) and bears on the bottom (6e) shown in FIG. 15. Advantageously, the Cunningham (12) is passed and fixed into a Cunningham eye (11d) and into an aperture (6f) provided on the central part (6). It allows adjustment of the tension of the sail (11), and integrates the sail (11) and the mast (10) into the central part (6).

(57) In practice, the user(s) is/are seated to starboard or to port of the floating vessel (21) in accordance with its equilibrium. If one refers to FIGS. 18 and 19, two return belts (19) fixed to the inflatable hull (1) enables the user to slide his/her feet under these belts, for leaning towards the back and thus changing the equilibrium of the floating vessel (21) by constituting a counterweight. In accordance with the same logic, it is possible to attach the extremity of the bearing parts (8) to the extremity of the lateral branches (16a) of the rudder mounting (16) by the wings (20). In a precise example of implementation, the wings (20) are tubes that can be fixed by a sleeve system to the bearing parts (8) and the lateral branches (16a), and which incorporate a foam pudding fender (20a). The wings are advantageously located behind the navigator when he/she is seated on the port or starboard edge of the inflatable hull and leans towards the rear. They constitute bearing points for the back or seat, and can possibly stiffen the inflatable hull (1), notably if the dual-wall textile (2c, 2d, 2f) does not have sufficient thickness to be able itself to withstand the stresses applied to the inflatable hull (1).

(58) According to a preferred form of implementation, a reinforcement arm (8) (not illustrated) extends from the mast foundation base (6b) to the extremity of each of the bearing parts (8). The supporting structure for the wings (20), which is intended to support the weight of one or more people, is strengthened.

(59) In practice, when disassembled, the floating vessel (21) is stored in a bag that contains: the inflatable hull (1) and the sail (11) rolled or folded, the equipment parts of centerboarder type, and a manual inflation pump (not illustrated) that fits the inflation and deflation valves (3) of the inflatable hull (1).

(60) To summarize, the assembly of the floating vessel (21) takes place in the following manner. Firstly, the central part (6), then the bearing parts (8) and the rudder mounting (16) are inserted into the inflatable hull (1) in the deflated state. Next, it is possible to fix the wings (20) onto the bearing parts (8) and the rudder mounting. Then the inflatable hull (1) is inflated. Next, one inserts the mast (10) and the batten (13) into the sail (11). The mast (10) is then placed in the mast foundation base (6b). The rudder (15) is fixed with the pin (18) and the mainsheet (14) is fitted. Lastly, when the centerboarder is in the water, the centerboard (7) is slid into the centerboard well (6a).

(61) Although the floating vessel (21) described incorporates an inflatable hull (1), it can, of course, incorporate an inflatable hull (1) or any other inflatable hull in accordance with the invention.

(62) Thus, according to another variant of implementation in FIGS. 20 and 21, which is more particularly suited to the inflatable hull (1), one or more interior strips (2m) located between the port (2b) and starboard (2a) parts are fixed impermeably between the two walls (2c) and (2d) of the dual-wall textile (2c, 2d, 2f) on certain portions of the length of the pneumatic envelope (2), so as to reconstitute the lateral wall of the apertures (4a) and (4b).

(63) The invention is not limited to the example described with reference to FIGS. 1 to 21, but cover the technical equivalents.