Multi-hull rebuilt vessels with variable shape

Abstract

A multi-hull sailboat or motorboat that are made of a number of single-hull vessels in the process of modification or utilization of old yachts, wherein said multi-hull vessel can be configured as a pivoted train-like combined vessel, as a permanently-merged vessel or can be configured as a catamaran or triamaran. Also, said multi-hull sailboat or motorboat can be made of a number of new single-hull vessels equipped by a universal connecting device.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

This Application is related to U.S. patent application Ser. No. 12/548,538.

STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT

Not Applicable.

THE NAMES OF THE PARTIES TO A JOINT RESEARCH AGREEMENT

Not Applicable.

INCORPORATED-BY-REFERENCE OF MATERIAL SUBMITTED ON A COMPACT DISK

Not Applicable.

FIELD OF THE INVENTION

The present invention relates to multi-hull vessels, and more particularly to rebuild or modified boats having combined hull.

DESCRIPTION OF THE RELATED ART

Small and medium-size sailing boats with single hull, such as Alberg 30 yacht and similar, are often used for sport and leisure. Such vessels are relatively small and light enough to be transported on a privet car or track trailer. Further, the price for such a yacht is much low in comparison with large ocean yacht; but this yacht capacity, its internal space and facilities are limited by the size of the vessel. Therefore, yacht designer try to create large-size vessels from small single-hull sections. There are a few ways to do it. One of them is a multi-hull catamaran or triamaran, wherein the hulls are laterally opposed and each hull having a longitudinal axis in the direction of travel of the boat, such as described in U.S. Pat. Nos. 3,998,175, 5,189,974, 5,191,849, 6,131,529, 6,810,828, 6,830,003 and International Patent Application WO/2003/080424. Such multi-hull vessels allow enlarging its capacity, but they inherit all disadvantages of parallel-hull vessels, such as low maneuverability, high hydrodynamic drag (in comparison with single-hull vessel), etc. Also, even though the initial stability of parallel-hull vessels is high, it starts diminishing when such vessel is listing, unlike single-hull yachts having a keel; and when list of parallel-hull vessels reaches some relatively small angle (40-60 arc degrees), this catamaran becomes capsized.

Another approach allows enlarging existing vessels by means of a combination of sequentially connected sections, such as described in U.S. Pat. Nos. 3,916,468, 5,315,947, 6,357,373, US Patent Application No 2004149196 and US Patent Application No 20090038532. In particular, the vessel described in US Patent Application No 2004149196 has a multi-mode hull where the draft, seakeeping, and payload-carrying capacity are varied by means of introduction of additional section that, according to the author, allows matching the requirements of the required mission. Also, the vessel described in US Patent Application No 20090038532 consists of a number of sequentially-connected sections pivoted in the vertical plane that, according to the author, allows not cutting, but going round ocean waves so minimizing hydrodynamic drag.

Analysis of the mentioned patents shows that all of these vessels are specially designed as multi-hull ones. It is another approach to design of multi-hull vessels—combining similar single-hull vessels, such as sailboats or motorboats into multi-hull boat. In the particular, sequential connection of couple of single yachts allows creating a single vessel having the same B (beam), but with long LOA (Length Overall). Therefore, such yacht has longer LWL (Waterline Length) and higher LOA/B ratio that allows increasing maximal speed of the vessel.

Yacht's Hull Speed (HSPD)—the theoretical hull speed for a displacement hull (like most sail boats)—is a function of the length of the wave created by the boat as it moves through the water. It can be determined by the formula:

HSPD=1.34√LWL.

It means that a yacht having twice longer hull can move faster in 1.4 times, but such long-hull yacht has to have rigid hull design to overcome bending momentums applied to the yacht.

The diagram forces and momentums applied to a single-hull sailing vessel are depicted in FIG. 1a. It shows that the vertical bending momentum M₁ is applied to the vessel when it is on a top of wave; and the horizontal bending momentum M₂ is applied to the vessel when it is turning. Both of mentioned momentums try to break vessels hull; and these momentums are proportional to hull length.

The flexible train-like sequentially-connected multi-hull yacht shown on FIG. 1b contains two of relatively short hulls joint together by a connecting device that allows hulls turning about each other in vertical and horizontal plane on some angle. Therefore, sequentially-connected multi-hull yacht is going round ocean waves as depicted in FIG. 1b; it allows releasing bending momentums that try to break yacht's hull (especially when the hull is long) when the yacht is on a top of a wave and also minimizing hydrodynamic drag. Moreover, axis of each hull of such combined yacht is directed along yacht's vector of speed that diminishes hydrodynamic drag when the yacht is turning (see FIG. 1b). Also, such design allows doubling (for two-hull vessel) vessel's displacement so enlarging internal space of the vessel providing more comfort and facilities for the crew. Actually, because such yacht contains doubled facilities and space, it could be classified as a large one; and its cost can be just a small portion of the cost of the similar-size luxurious yacht.

There are two possible ways to transform single-hull yachts into a multi-hull one:

• • a. The first way is to perform such transformation with old decommissioned yachts to permanently join them together in the process of utilization of old-model yachts. It allows giving them “a second life”.
  • b. The second way is to equip a single yacht with specific universal connecting devices that allow making a desirable combination (sequential or parallel one) of yachts into multi-hull vessel.
  • So, it can be a parallel connection of the yachts (catamaran or triamaran) or sequential connection described above. In this case, such transformation can be performed in the process of utilization of old-model yachts, or new yacht can be additionally equipped with mentioned connecting devices.

SUMMARY OF THE INVENTION

In the embodiments of the present invention, there are modified vessels comprising a number of yachts arranged in train sequences or in parallel to each other as a catamaran or triamaran. The first embodiment of the present invention comprises multi-hull vessels in which each yacht is permanently modified to be a part of the multi-hull vessel.

In another embodiment of the present invention, each yacht of the multi-hull vessel is an individual one equipped with a specific universal connecting device that allow transforming the yachts into a multi-hull vessel, wherein each yacht—the part of such a multi-hull vessels—can be disconnected from each other and becomes again the single-hull vessels. This transformation can be performed in the process of utilization of old-model yachts, or by means of implementation of the universal connecting devices in new-built yachts.

DESCRIPTION OF THE DRAWINGS

FIG. 1a depicts diagram of forces and momentums applied to a single-hull sailing vessels.

FIG. 1b depicts scheme of sequentially-combined multi-hull sailing vessel.

FIG. 2 depicts scheme of connecting device of the sequentially-combined-hull sailing vessel of the preferred embodiment.

FIG. 3 depicts variant of the preferred embodiment of the present invention—the scheme of double-hull sailing yacht made of two permanently merged single-hull yachts.

FIG. 4 shows the example of double-hull sailing yacht made of two permanently merged Alberg 30 yachts.

FIG. 5 shows the example of double-hull canoe-like sailing yacht made of two permanently merged Alberg 30 yachts.

FIG. 6 shows the example of double-hull motorboat made of two permanently merged Alwest 370 motorboats.

FIG. 7 depicts scheme of hydrofoil assembly for the double-hull sailing yacht made of two permanently merged yachts.

FIG. 8 depicts horizontal view of the scheme of catamaran sailing yacht made of two single-hull yachts by means of pivoted frame—the intermediate deck.

FIG. 9 depicts vertical view of the scheme of the catamaran sailing yacht made of two single-hull yachts by means of pivoted frame.

FIG. 10 depicts horizontal view of the scheme of catamaran sailing yacht made of two single-hull yachts by means of inflatable bridges.

FIG. 11 depicts vertical view of the scheme of the catamaran sailing yacht made of two single-hull yachts by means of inflatable bridges.

FIG. 12 depicts vertical view of the scheme of triamaran sailing yacht made of three single-hull yachts.

FIG. 13 depicts horizontal view of the scheme of two variants of the triamaran sailing yacht.

DESCRIPTION OF THE PREFERRED EMBODIMENTS OF THE INVENTION

There are a number of variants of embodiments of such multi-hull sequentially-combined sailboats or motorboats. One of them is shown on FIG. 1b. It is just permanent or temporary connection of individual single-hull vessels in sequences. Another embodiment (FIG. 3) requires cutting and permanent merging two hulls in the single one.

The first variant of multi-hull sailboat (or motorboat) of the preferred embodiment comprises a number of individual single-hull vessels that are sequentially arranged and joint together by means of a pivoted connecting devices to provide a train-like multi-hull vessel, wherein each vessel can be turned about another vessel to which it is pivotally connected on small angle in vertical and horizontal planes. It provides flexibility for the multi-hull vessel in such a way that allows it going round ocean waves; and, because the relative velocity vector is directed along axis of each hull, such train-like assembly is going round a corner so diminishing hydrodynamic drag when it is turning.

These multi-hull vessels can be made in the process of modification or utilization of old yachts or motorboats.

Description of the First Variant of the Preferred Embodiments of the Present Invention

Sequential Multi-Hull Combination of Yachts Having Pivoted Connection

Each sailboat of the multi-hull vessel of this variant of the preferred embodiment comprises a hull 1, a sail assembly 21 and 22, a keel 3, a rudder 4, a mast 5 and connecting devices 6 that unites the number of boats (two boats on FIG. 1b) into the single multi-hull assembly. The sail assembly is or may be of conventional design, and as shown on FIG. 1b comprises a mast 5 to which a head sail 22 and a mainsail 21 are mounted. It also can comprise a small engine that is used when wind speed is not enough to power said boat. The hull 1 has a conventional design of a sailing yacht—a rounded, elongate configuration symmetrical about its longitudinal center axis.

The yachts of the first variant of the preferred embodiment are connected together by the pivoted connecting device 6, which is depicted in FIG. 2 for two-vessel assembly. Here, the connecting device comprises two flexible cables 61 and 62, and a pivot comprising a member 65 containing a cylindrically rounded cam 69 attached to the bow of the second consecutive yacht and member 63 having cylindrically-shaped concave pattern 631 attached to the stern of the first yacht. The cables 61 and 62 are winded on drums 67 and 68, which are placed inside of the stern of the first yacht in the compartment 19 that is not hermetically sealed from sea water. From another ends, the cables 61 and 62 are rigidly fixed to the bow of the second vessel. Each drums 67 and 68 has a cam (position 671 for dram 67), so they can turn about its axis 613 and 614 on some angle restricted by the cam 671 and pattern 6112 (for dram 67 and holder 611), wherein the axis 613 is connected to and supported by holder 611; and the axis 614 is connected to holder 612. To provide permanent touching the cam 69 with surface of the concave pattern 631 of the member 63, the drums 67 and 68 are tensing the cables by means of the holders 611 and 612 that are made of rubber and have inflatable cavities 6111 and 6121, which are pressurized to achieve necessary tension of cables 61 and 62.

Because all parts of the connecting device 6 are in contact with ocean water, they are made of plastic, rubber or other water-resistant materials. So, the cables 61 and 62 are made of nylon, Kevlar or another material that are suitable for heavy duty cables. The members 65 and 63 are made of solid rubber or another suitable plastic or composite water-resistant material. The drums 67 and 68 are made of salt-water-resistant plastic.

This embodiment of the connecting device 6 provides to such combined yacht flexibility; so yachts from the assembly can turn about each other on some angle in horizontal and vertical planes that allows to the combined yacht going round ocean waves and corners when the yacht changes direction.

To provide access from one part of the combined yacht to another one, the flexible bridge 7 is placed between two hulls above the connecting device 6 (see FIG. 1b). Also, to provide for such combined vessel appearance of a single vessel, screen 9 covering the connecting device 6 is placed between the hulls.

The connecting device 6 can be made as a universal one that does not requires serious modification of the existed vessel. In this case, the compartment 19 is mechanically connected to yacht's stern by means of temporary bandages.

The connecting device 6 can be used to connect more than two vessels, for example three vessels in row. In this case the second vessel is equipped with compartment 19 connected to its stern, whereas the third vessel has member 65 attached to its bow. As an example, the combined yacht of this embodiment can be useful when two families have the yachts and want to float together. So, they attach the connecting device of the present invention to their yachts and temporary join both yachts into single multi-hull yacht.

The solution of this embodiment can be applied to motorboats, wherein two or more single-hull motorboats are connected together by said pivoted connecting device into single long-hull vessel.

Said multi-hull vessel can be made in the process of modification or utilization of old yachts or motorboats; or it can be a combination of new single-hull vessels equipped by said universal connecting device, wherein each vessel—the part of such a multi-hull vessels—can be disconnected from each other and becomes again the single-hull vessels.

Description of the Second Variant of the Preferred Embodiments of the Present Invention

Two Single-Hull Yachts Modified into a Solid Multi-Hull Yacht

The scheme of this embodiment is depicted in FIG. 3. The example of application of the present embodiment comprising two Alberg 30 single-hull yachts is represented on FIG. 4. In this embodiment two or more single-hull yachts are mechanically merged together into single long-hull sailing yacht, wherein the first vessel keeps its bow 11, keel 3, mast 5, headsail 22 and mainsail 21; and the second vessel keeps its stern 212, keel 23, mast 25, mainsail 212 and rudder 24. Also, the second vessel keeps all its internal equipment placed in the stern, such as inboard motor. The hulls of the first and second vessels are processed in such a way that the stern of the first vessel and the bow of the second vessel are cut and removed; and both hulls are connected by means of intermediate section 8.

The procedure of connecting of two hulls into long-hull single one is follows:

• • cut and remove part of the hull's stern of the first single-hull vessel and the corresponding part of its internal structure,
  • cut and remove part of the hull's bow of the second single-hull vessel and the corresponding part of its internal structure,
  • mechanically join together parts of the hulls of the first and the second vessels by means of short intermediate section that is (depending on hull's material) welded, glued or riveted to said hulls,
  • seal the joint.

It is, also, possible to connect sterns of two single-hull vessels to make a single canoe-like long-hull vessel. Such combined vessel made of two Alberg 30 yachts is shown on FIG. 5. In this case that yachts keep all its members, such as masts (positions 5 and 25), sail assemblies (positions 21, 22, 211, 212), rudders (positions 4 and 24) and motors. Such combination allows the yacht moving in reverse directions without turning, use all yacht equipment and twice enlarge internal space.

The solution of this embodiment can be applied to motorboats, wherein two or more single-hull motorboats are mechanically merged together into single long-hull vessel. Such combined vessel made of two Alwest 370 motorboats is shown on FIG. 6.

To provide stability and counteract bending momentums applied to the combined hull of such vessel, it can be equipped with hydrofoils described in U.S. patent application Ser. No. 12/548,538 filed by the author of the present invention. The scheme of the combined-hull sailing vessel equipped with hydrofoils is depicted in FIG. 7. Here, the hydrofoil assembly 19 that includes four hydrofoils—two on each side of the vessel—is installed on the first hull of the combined-hull vessel, the second assembly 81 is installed on the intermediate section 8, and the third assembly 29 is installed on the second hull of the combined-hull vessel. Therefore, on rough see when the vessel is on a top of wave appear forces F_B developing bending momentum M_B that try to break such long combined hull. In this case the hydrofoils of assemblies 19 and 29 is turned on such angle that provide ascending forced F_H so develops momentum M_H counteracting bending momentum M_B. In the case when the vessel is between waves the hydrofoils are turned on the angle providing descending forces so, again, counteracting the bending momentum.

Description of Another Embodiments of the Present Invention

A Multi-Hull Catamaran Made of Two Single-Hull Yachts

The scheme of this embodiment is depicted in FIG. 8 and FIG. 9. In this embodiment two single-hull yachts are connected together into catamaran sailing yacht by means of pivoted frame—an intermediate deck 31, wherein the vessels are modified very little, so they keep all its parts and equipment, such as hulls 1 and 2, bows 12 and 211, keels 3 and 23, masts 5 and 25, headsails 22 and 222, mainsails 21 and 221, rudders 4 and 24. The deck 31 comprises two lateral members 315 and 316, two diagonal members 313 and 314 that reinforce bridge in horizontal plane, two boxes 321 and 322 containing pulled beams 317, 318, 319 and 320, and four ball pivots 311, 312, 331 and 332 connecting members 315 and 316 to hulls 1 and 2, wherein diagonal members 313 and 314 are connected to the lateral members 315 and 316 by means of ball pivots 333, 334, 335 and 336. The deck 31 also comprises decking 390 that allows to crew moving from one single-hull yacht to another one. Therefore, because of eight ball pivots 311, 312, 331, 332, 333, 334, 335 and 336 deck 31 can be bent about lateral axis and hulls 1 and 2 can be turned about the deck 31 in vertical plane; and diagonal members 313 and 314 prevent deck 31 from collapsing. This design is proposed in the present invention because such catamaran-like vessel made of two yachts is different from conventional catamarans, which contain long narrow and light floats; and, unlike these floats, heavy yacht's hull can not easily get out of water; and the hulls still in water when such catamaran vessel is turning or listing. Therefore, the deck 31 firmly fixed to the hulls can be broken; and to avoid it the deck 31 can be pivotally connected to hulls as depicted in FIG. 9. In this case, the hulls can be turned about the deck 31 on some angle in vertical plane (when the hulls are moving upwardly or downwardly and they are listing); therefore hulls of each yacht incorporated into multi-hull catamaran of the present invention can list independently when they are affected by lateral wind or when the catamaran is turning, whereas such catamaran operates as a single vessel in horizontal plane. Also, pivoted design of the deck 31 allows each hull rolling independently too.

When this catamaran is docked in marina, the deck 31 can be firmly fixed to the hulls by means of lateral beams 317, 318, 319 and 320. It makes all members of the vessel rigidly connected together so providing to a crew convenience to walk on the decks, refill water, food, etc. The beams 318 and 319 are in a box 321 (and beams 317 and 320 are in box 322) from which they can be pulled out in opposite directions and firmly fixed on the hulls as depicted in FIG. 8.

Also, the members 313 and 314 can be disconnected from the deck 31; so the deck 31 becomes collapsible and all its members can be collected in single bundle and fastened to the hull of one of the vessels.

Because the hulls of such catamaran can list independently, to prevent collision of the hulls, width of the bridge 31 has to exceed 2D, where D—Draft of the yacht.

Yachts of this embodiment can be additionally equipped with connecting device 6 of the first embodiment (see FIG. 1b); therefore such two yachts can be transformed into catamaran or train-like sequentially-connected yacht, wherein the members of the deck 31 can be used to firmly fix the hulls when the sequentially-connected yacht is docked in marina

The solution of this embodiment can be applied to motorboats, wherein two single-hull motorboats are connected together into catamaran vessel.

The multi-hull vessel of this embodiment can be made in the process of modification or utilization of old yachts or motorboats.

Description of Variant of a Multi-Hull Catamaran Made of Two Single-Hull Yachts

The scheme of this embodiment is depicted in FIG. 10 and FIG. 11. In this embodiment two single-hull yachts are connected together into catamaran sailing yacht by means of inflatable frame—two intermediate bridges 374 and 377, wherein the vessels are modified very little, so they keep all its parts and equipment. Each bridge (positions 374 and 377 on FIG. 10 and FIG. 11) is a pressurized inflatable pattern made of rubber or another water-resistant flexible material that can keep pressure. The bridges are connected to hulls of said single-hull yachts by means of molded cylindrical channels 372, 373, 375 and 376—the solid parts of the bridges 374 and 377—where tubes 381, 382, 383 and 384 are inserted; wherein said tubes are firmly connected to hulls of the single-hull yachts. Therefore, despite of the simple design, the bridges 374 and 377 allows combining two single-hull yachts into catamaran with minimal modification. These intermediate bridges are strong enough, so they prevent the hulls from collision, keep hulls together, but they also are flexible ones; therefore, hulls of each yacht incorporated into multi-hull catamaran of the present invention can list independently when they are affected by lateral wind or when the catamaran is turning, whereas such catamaran operates as a single vessel in horizontal plane. Also, flexibility of the bridges 374 and 377 allows each hull rolling independently too.

When this catamaran is docked in marina, the bridges 374 and 377 can be firmly fixed to the hulls by means of lateral beams 317, 318, 319 and 320. It makes all members of the vessel rigidly connected together so providing to a crew convenience to walk on the bridges, refill water, food, etc. The beams 317 and 318, 319 and 320 can be pulled out in opposite directions and firmly fixed on the hulls as depicted in FIG. 11.

The solution of this embodiment can be applied to motorboats, wherein two single-hull motorboats are connected together into catamaran vessel.

Description of Variant of a Multi-Hull Vessel Having Parallel Hull Connection—Triamaran Made of Three Single-Hule Yachts

The scheme of this embodiment is depicted in FIG. 12 and FIG. 13. In this embodiment three single-hull yachts are connected together into a triamaran by means of two pivoted frames—an intermediate decks 31 and 41 containing the same member of the deck 31 shown on FIG. 8 and FIG. 9, such as lateral members 315, 316, 415 and 416, diagonal members 313, 314, 413 and 414, boxes 321, 322, 421 and 422 that contains pulled beams 317, 318, 319, 320, 417, 418, 419, 420 and pivots 311, 312, 411 and 412, wherein the diagonal members 313, 314, 413 and 414 reinforce bridge in horizontal plane, and the pulled beams 317, 318, 319, 320, 417, 418, 419 and 420 can be pulled out in opposite directions so firmly connecting the hulls in a solid unit when the triamaran is docked.

The hulls of such triamaran can be positioned in parallel to each other, wherein bows of the hulls are laterally aligned to each other (see FIG. 13A), or when the bow of the middle hull is protruded in front of bows of other two hulls as depicted in FIG. 13B. In this case, the decks 31 and 41, unlike the decks of mentioned above triamaran, have a parallelogram shape. Also, the middle yacht of this embodiment can be higher class one, such as Alberg 37 (if two other are Alberg 30).

The solution of this embodiment can be applied to motorboats, wherein three single-hull motorboats are connected together into triamaran vessel.

The multi-hull vessel of this embodiment can be made in the process of modification or utilization of old yachts or motorboats.

Claims

1. A multi-hull vessel comprising:

a number of displacement hulls, a sail assembly mounted to said hulls, a keel mounted beneath said hulls,

wherein the improvement that allows transforming a number of single-hull vessels into a multi-hull vessel comprises:

a first and a second single-hull sailboat that are mechanically merged together into a single long-hull sailboat, wherein said first sailboat keeps its bow, keel, mast, headsail and mainsail; and said second sailboat keeps its stern, keel, mast, mainsail and rudder; also, said second single-hull sailboats keeps all its internal equipment placed in the stern, such as an inboard motor, wherein said hulls of said first and second sailboats are processed by means of cutting and removing a stern of said first sailboat and a bow of said second sailboat; and both said hulls are connected by means of an intermediate section forming said single multi-hull vessel.

2. The multi-hull vessel of claim 1, wherein the vessels that are mechanically merged together into a single long-hull vessel are motorboats.

3. A multi-hull vessel comprising a number of individual single-hull sailboats, which are sequentially arranged and joint together by means of pivoted connecting devices to create a train-like multi-hull vessel, wherein each said single-hull sailboat can be turned about another sailboat, to which it is pivotally connected, on angle in vertical and horizontal planes so providing flexibility for said multi-hull vessel that allows said multi-hull vessel going round ocean waves and diminishing hydrodynamic drag.

4. The multi-hull vessel of claim 3, wherein the vessels that are sequentially arranged and joint together by means of pivoted connecting devices into said train-like multi-hull vessel are motorboats.

5. The connecting device of the train-like multi-hull vessel of claim 3, which contains at least a first and a second individual single-hull vessels, comprising:

two flexible cables that are winded on vertically-spaced drums placed inside of the stern of said first single-hull vessel in a compartment that is not hermetically sealed from sea water, wherein from another ends said cables are rigidly fixed to the bow of said second single-hull vessel and continuously tensed,

a pivot comprising a first member made of solid rubber or another flexible and water-resistant material, which is attached to the bow of said second single-hull vessel and contains a cylindrically rounded cam, and a second member made of solid rubber or another flexible and water-resistant material, which is attached to the stern of said first single-hull vessel and has a cylindrically-shaped concave pattern, wherein, to provide permanent contact of said cam with said concave surface of said second member, said drums are tensing said cables by means of holders that are made of rubber and have inflatable cavities, which are pressurized to achieve necessary tension of said cables.

6. A multi-hull vessel comprising two single-hull sailboats that are connected together into a catamaran sailboat by means of pivoted frame—an intermediate deck, wherein said single-hull sailboats are modified very little keeping all its original parts, external and internal equipment; and said intermediate deck comprises:

two lateral members forming said intermediate deck,

two diagonal members reinforcing said deck in horizontal plane,

two boxes containing two pulled beams each, wherein, when said beams are pulled out of said boxes, they can be fixed to hulls of said sailboats that makes all members of the vessel rigidly connected together so providing to a crew convenience to walk on the decks, refill water, food, etc,

eight ball pivots connecting all members of said deck together and said lateral beams to hulls of said single-hull sailboats, which allow to said hulls of each sailboat incorporated into said catamaran listing and rolling independently when they are affected by lateral wind, rough see, or when the catamaran is maneuvering, whereas such catamaran operates as a single vessel in horizontal plane.

7. The multi-hull vessel of claim 6, wherein the vessels that are connected together into the catamaran of claim 6 by means of the pivoted frame of claim 6 are motorboats.

8. A multi-hull vessel comprising two single-hull sailboats that are connected together into catamaran sailboat by means of one or more inflatable intermediate bridges, wherein said single-hull sailboats are modified very little keeping all its original parts, external and internal equipment; and each of said inflatable bridges comprises a pressurized inflatable pattern made of rubber or another water-resistant flexible material that can keep pressure; wherein said bridges are connected to hulls of said single-hull sailboats by means of molded cylindrical channels—the solid parts of the bridges—in which tubes firmly connected to hulls of the said single-hull sailboats are inserted; therefore said intermediate bridges are strong enough to prevent the hulls from collision, they keep hulls together; also said bridges are flexible ones so allow hulls of each yacht incorporated into said multi-hull catamaran listing and rolling independently, whereas said catamaran operates as a single vessel in horizontal plane.

9. The multi-hull vessel of claim 8, wherein the vessels that are connected together into the catamaran of claim 8 by means of the inflatable intermediate bridges of claim 8 are motorboats.

10. A multi-hull vessel comprising three single-hull sailboats that are connected together into a triamaran sailboat by means of two pivoted frame—intermediate decks, wherein each of said single-hull sailboats is modified very little keeping all its original parts and external and internal equipment; and each said intermediate deck comprises:

two lateral members forming said intermediate deck,

two diagonal members reinforcing said deck in horizontal plane,

two boxes containing two pulled beams each, wherein, when said beams are pulled out of said boxes, they can be fixed to hulls of said sailboats that makes all members of said multi-hull vessel rigidly connected together so providing to a crew convenience to walk on the decks, refill water, food, etc.,

eight ball pivots connecting all members of said deck together and said lateral beams to hulls of said single-hull sailboats, which allow to said hulls of each sailboat incorporated into said triamaran listing and rolling independently when they are affected by lateral wind, rough see, or when said triamaran is maneuvering, whereas said triamaran operates as a single vessel in horizontal plane.

11. The multi-hull vessel of claim 10, wherein vessels that are connected together into the triamaran of claim 10 by means of the pivoted frames of claim 10 are motorboats.

12. A multi-hull vessel comprising three single-hull sailboats that are connected together into triamaran sailboat by means of two or more inflatable intermediate bridges, wherein said single-hull sailboats are modified very little keeping all its original parts, external and internal equipment; and each of said inflatable bridges comprises a pressurized inflatable pattern made of rubber or another water-resistant flexible material that can keep pressure; wherein said bridges are connected to hulls of said single-hull sailboats by means of molded cylindrical channels—the solid parts of the bridges—in which tubes firmly connected to hulls of the said single-hull sailboats are inserted; therefore said intermediate bridges are strong enough to prevent the hulls from collision, they keep hulls together; also said bridges are flexible ones so allow hulls of each yacht incorporated into said multi-hull triamaran listing and rolling independently, whereas said triamaran operates as a single vessel in horizontal plane.

13. The multi-hull vessel of claim 12, wherein the vessels that are connected together into the triamaran of claim 12 by means of the inflatable intermediate bridges of claim 12 are motorboats.