WO2016020814A1

WO2016020814A1 - Catamaran boat

Info

Publication number: WO2016020814A1
Application number: PCT/IB2015/055832
Authority: WO
Inventors: John SCANU; Luca RIVIERI
Original assignee: Scanu John; Rivieri Luca
Priority date: 2014-08-04
Filing date: 2015-07-31
Publication date: 2016-02-11
Also published as: HRP20182094T1; EP3177518A1; CA2957373A1; HUE042658T2; EP3177518B1

Abstract

The invention relates to the nautical sector, and concerns in particular a catamaran boat (1) comprising: a first catamaran craft (1a) functioning independently, having a prevailing direction of longitudinal development along the median axis (x) and comprising a bow (2a), a stern (3a), motor means (4a) and directional means (5a); a second catamaran craft (1b) functioning independently, having a prevailing direction of longitudinal development along the median axis (x) and comprising a bow (2b), a stern (3b), motor means (4b) and directional means (5b), where said first catamaran craft (1a) and said second catamaran craft (1b) each comprise joining means for their mutual stable coupling, obtained matching the relative sterns (3a, 3b), on a transverse junction plane (Π ), to carry out said catamaran boat (1) able to function as a single unit.

Description

D ES C R I PT I O N

CATAMARAN BOAT

The present invention relates to a catamaran boat of the type specified in the preamble of the claim 1.

Each water transport means is currently being designed and built with the specific aim of carrying a maximum defined number of people and, therefore, with a definite weight and / or maximum load volume.

For any business, maximize profit results in optimizing the resources and the use of said means.

For this reason, those who develop a business in water transportation of things/people, should know precisely the flow density transported during the course of their works.

This estimate is not always easy to implement.

In fact, it may happen that the need to increase the load capacity of the water transport means takes place. This may happens also suddenly and/or for a variable time that can't be estimated a priori. Conversely, it may happen that, in some periods of the year, the demand is so limited that the water transport means are absolutely oversized for the mission, with unavoidable increase in operating costs and maintenance.

The load capacity variable can be really important, especially during some periods of the year. Considers, for example, the passengers transport activities close to the holiday periods in tourist areas: in this case the increase of the load capacity is limited to a few days. Alternatively, in the case of transport for commercial purposes of products, the increase of the load can be tied to the seasonal nature of such products, or affect time windows of amplitude undefined and unpredictable.

Disadvantageously, the traditional boats do not lend themselves to such versatility, with unavoidable increase in terms of operating costs. In some cases, the non-satisfaction of some requests, causes discontent loss of customers, economic and image disadvantages.

Another problem for the boats consists in the fact that, having to navigate even in routes particularly narrow (for example in a river, a channel, a harbor, etc.), they are very complex and hard working to handle.

In particular, this problem can be especially evident in the case of boats which, being dimensioned to have a considerable load capacity, have a high overall size and, therefore, require numerous and complex maneuvers to overcome an obstacle or a bend.

Under this situation, the technical task underlying the present invention is to provide a catamaran boat capable of substantially obviating the mentioned drawbacks.

Within the scope of this technical task, it is an important aim of the invention to have a modular catamaran boat, with a certain load flexibility, modulated in order to satisfy any condition of transport.

Another important aim of the invention is to realize a catamaran boat strong, sturdy, whose load capacity is variable easily and in conditions of maximum safety for the operators.

A further aim of the invention is to make a catamaran boat economic to manufacture and, moreover, characterized by a high simplicity of maneuvering. The technical task mentioned and the aims specified are achieved by a catamaran boats claimed in the appended Claim 1 Particularly, the objects are achieved with a catamaran boat characterized in that it comprises at least one catamaran craft defining a bow, a stern and comprising:

- two side hulls each defining a median axis;

- a supporting structure, named bridge, connecting and, in particular, subtended between the side hulls and defining a supporting surface;

- an optional structure linked to the bridge at the top, defined superstructure and consisting of the side walls and ceiling;

- motor means adapted to generate the thrust force of the catamaran boat and selectively arranged at the bow or at the stern;

- directional means adapted to define, appropriately together with the motor means, the advancement direction of the catamaran boat and placed on the opposite side to the motor means and, therefore, at the stern or at the bow;

- said motor and directional means are placed between the side hulls. According to the first aspects of the invention:

- said motor means comprise a azimuth thruster,

- said directional means comprise a rudder blade,

- wherein said motor means and said directional means are provided along said median axes

According to a possible embodiment of the invention, the azimuth thruster of the catamaran craft rotates around a thrust axis substantially perpendicular to the supporting surface.

According to another possible embodiment of the invention, the rudder blade of the catamaran craft rotates around a directional axis substantially perpendicular to the supporting surface.

According to a further possible embodiment of the invention, the azimuth thruster rotation is controlled in a dependent way or, preferably, an independent way respect to the rotation of the rudder blade.

In more detail, the aims are achieved with a catamaran boat characterized in that it comprises:

- a first catamaran craft that works independently, having a main direction of longitudinal development along a median axis and comprising a bow, a stern, motor means and directional means;

- a second catamaran craft that works independently, having a main direction of longitudinal development along a median axis and comprising a bow, a stern, motor means and directional means,

- wherein both said first catamaran craft and said second catamaran craft comprise coupling means for their mutual stable connection, obtained by fitting their sterns together, on a transverse junction plane, in order to realize said catamaran boat adapted to work as a single unit.

According to the first aspects of the invention:

- both the first and the second catamaran crafts defining a bow, a stern and comprising:

o two side hulls; and

o a supporting structure connecting and, in particular, subtended between the side hulls and defining a supporting surface for the things and/or people to be carried with the catamaran boat; and o an optional structure linked to the bridge from the top, defined superstructure and composed by the side walls and the ceiling; - motor means preferably comprising an azimuth thruster provided in the respective bow area of each catamaran craft;

- directional means preferably comprising a rudder blade provided on the opposite side of the motor means and, in particular, in the respective stern area of each catamaran craft,

- where said motor means and said directional means are provided between the hulls and, in particular, along said median axes.

Advantageously, said first and said second catamaran craft are identical and the hull resulting from their junction is substantially symmetrical with respect to said junction transverse plane.

According to a further aspect of the invention, said coupling means comprise:

- aligning means adapted to make the first and the second catamaran craft coaxial;

- coupling means for said first end second catamaran crafts;

- locking means adapted to make the coupling of said first and second craft stable and rigid.

In detail:

- said aligning means comprise shape-coupling means provided at said

sterns;

- said coupling means work along the main direction of longitudinal development of said first craft and said second craft and comprise a movable hook provided on each craft, adapted to interact with a respective retaining element provided on the opposite craft; and said movable hook comprises a hydraulic or electric linear actuator able to exert a traction force to bring together said first and said second catamaran craft. Moreover, said locking means comprise:

- a panel pivotally associated to each catamaran craft and adapted to rotate in order to be stably fixed to the opposite catamaran craft;

- a hook jaw provided on a covering wall of each catamaran craft and adapted to engage a respective retaining element formed by the coupling of said first and said second catamaran craft.

According to a possible embodiment of the invention, the azimuth thrusters of said first and second catamaran crafts rotate independently on respective axes to ensure the handling of said catamaran boat resulting from the union of the catamaran crafts.

According to the invention the main advantage of the catamaran boat lies in its modularity and flexibility.

A catamaran boat with a modular architecture, such as the one in question, can solve different requirements related to a daily or seasonally variable load capacity, a reduction of costs related to personnel on board, fuel and parking at the dock.

Each catamaran craft, in fact, provides by itself a well-defined load capacity, which may, however, be doubled if they are to form, once assembled, a single means of transport, that is to say a single catamaran boat.

This will determine the conditions for an operational flexibility that allows, in conditions of low traffic, to use separately the two catamaran crafts, for example by varying the mission profile of each craft, assigning to the two catamaran crafts different tasks on different routes, or simply sheltering one craft waiting for a new increase in traffic, with cost savings related to wear through exertion. Instead, in heavy traffic conditions, it is possible to increase and, in detail, it double the capacity by matching two catamaran crafts, with minimal burden in terms of engaged crew and management costs of the catamaran boat.

An important advantage is represented by the fact that the catamaran craft, thanks to the innovative arrangement of the motor and directional means, ensures a high maneuverability to the catamaran boat.

In fact, their arrangement between the hulls ensures, in every condition, the presence of an optimal flow affecting the motor and directional means and, therefore, their optimum performance.

Furthermore, the possibility of exploiting, in addition to the rudder, an azimuth thruster to generate a torque rotating the catamaran craft and/or the catamaran boat, allows to considerably reduce the maneuvering spaces of the catamaran boat itself.

Another important aspect is the storage of the catamaran boat for extraordinary maintenance operations. The operation performed in two stages, separately for the two catamaran crafts, allows two advantages: on the one hand it reduces the cost of lifting and positioning on site, having to move a smaller load, with reduced use of lifting equipment and less occupied spaces, on the other hand it allows to not completely stop the activity because of the use of the catamaran boat.

The coupling of two catamaran crafts imposes geometric characteristics appropriate of the respective aft zones, for which it is extremely advantageous to use catamaran crafts with a hull of the catamaran type.

The catamaran hull, in fact, allows the installation of steering bodies suitably arranged in the stern area and, if positioned between the side hulls and, in particular, on the axis of symmetry of the catamaran boat, they are especially efficient. In the traditional hulls it occurs instead that the maneuver bodies, in most cases, protrude from the aft end to the outside, thereby preventing a possible combination of the sterns of the two catamaran crafts.

The use of catamaran hulls also allows a more efficient coupling and a structurally more resistant constraint.

The two independent catamaran crafts are mutually identical. This characteristic is essential for operating a correct positioning there between during the mutual approach, even in case of minimum headway, and then ensuring, thanks to the structural symmetry and fair distribution of the weights derived there from, an optimal, stable and rigid constraint.

Furthermore, the use of two identical catamaran crafts allows, once assembled, to assign either one or the other the main control functions, with a more convenient maneuverability of the catamaran boat. The captain may, in fact, choose the command post between the two existing and equivalent, simply basing on the specifics of mission, and from said control post he can access all systems on board.

The fact that the two catamaran crafts are identical is extremely advantageous also for the ship production, basically for two aspects: on the one hand, mass- producing always the same catamaran boat greatly reduces the costs related to the production process; on the other, it is possible to meet very different requirements, with respect to the volume of cargo to be transported, reducing time, space and job costs.

Advantageously, the above-described variation of the capacity of people and / or things transport can be increased by realizing a catamaran boat, adding to catamaran crafts one or more intermediate catamaran crafts, able to be connected permanently between the catamaran crafts, and / or adding at least one additional catamaran craft able to bind to the stern of a catamaran craft. The distribution and shape of the coupling means is extremely favorable for the structural rigidity of the assembled catamaran boat, as it will be highlighted in the following description.

Preferred embodiments are highlighted in the sub-claims.

The characteristics and advantages of the invention are clarified below by the detailed description of one or more preferred embodiments of the invention, with reference to the accompanying drawings, in which:

Fig. 1 represents, in an axonometric view, a catamaran boat according to the invention;

Fig. 2a shows a component of the catamaran boat of Fig. 1 ;

Fig. 2b shows a different component part of the catamaran boat of Fig. 1 ; Fig. 3a shows a different view of the component of Fig. 2a;

Fig. 3b is a different view of the component of Fig. 2b;

Fig. 4 presents another axonometric view of the component of Fig. 3b;

Fig. 5 is a side view of the component of Fig. 3b;

Fig. 6 shows, in axonometric view, the catamaran boat of Fig. 1 during a step of assembly;

Fig. 7 shows the components of Figs. 2a and 2b side by side;

Fig. 8 is an assembly of the catamaran boat;

Fig. 9 shows a sub-assembly of Fig. 8;

Fig. 10 shows, in axonometric view, the catamaran boat;

Fig. 11 shows the catamaran boat in a different time with respect to Fig. 10; Fig. 12 shows some parts of the component of Fig. 2b;

Fig.13 is an assembly of the catamaran boat distinguished from that of Fig.

8;

Fig. 14 shows a detail of Fig. 13;

Fig. 15 shows another example of catamaran boat according to the invention;

Fig. 16a shows a further example of catamaran boat according to the invention;

Fig. 16b shows another view of the catamaran boat of Fig. 16a;

Fig. 17a is an additional example of catamaran boat according to the invention;

Fig. 17b shows another view of the catamaran boat of Fig. 17a;

Fig. 18 shows an assembly alternative to that of Fig. 7;

Fig. 19a is a detail of Fig. 18; and

Fig. 19b is the detail of Fig. 18a in a different position.

In this document, measures, values, shapes and geometric references (as squareness and parallelism), when associated to words such as "about" or similar terms such as "almost" or "substantially", are to be intended as measurement errors or inaccuracies due to production and/or manufacture errors and, above all, with the exception of a slight divergence from the value, from the size, from the shape or from the geometric reference which it is associated. For example, such terms, when associated to a value, preferably indicate a divergence of no more than 10% of the value itself.

Furthermore, when used, terms such as "first", "second", "upper", "lower", "main" and "secondary" do not necessarily identify an order, a priority of relationship or relative position, but can simply be used for more clearly distinguish between them different components.

With reference to the mentioned figures, the catamaran boat according to the invention is globally indicated with the number!

It is designed to be used for the sea navigation or in inland waters (or protected). In particular, the catamaran boat lean be, therefore, apt to be used for navigation along a waterway, that is a navigable canal, of natural or artificial origin, used to manage the vessel traffic such as, for example, a river or a lake.

The catamaran boatl comprises at least one catamaran craft and, preferably, two catamaran crafts, namely a first catamaran craft 1a (Figs. 2a and 3a) and a second catamaran craft 1b (Figs. 2band 3b). In particular, it is obtained by the stable connection of two catamaran crafts 1a, 1b substantially identical, both having a catamaran hull and each defining a median axis x.

Each of said catamaran crafts 1a, 1b comprises a bow 2a, 2b, a stern 3a, 3b, and at least one among the motor means 4a, 4b and directional means 5a, 5b. In particular, the first catamaran craft 1a can act independently and therefore comprises a first bow 2a, a first stern 3a, first motor means 4a, first directional means 5a provided along the prevailing direction of longitudinal development of the same catamaran craft, coinciding with a median axis x; while the second catamaran craft, also functioning independently comprises a second bow 2b, a second stern 3b, and one between the second motor means 4b and second directional means 5b. Preferably, each catamaran craft 1a, 1 b is functioning independently and therefore comprises a bow 2a, 2b, a stern 3a, 3b, and motor means 4a, 4b and directional means 5a, 5b provided along the prevailing direction of longitudinal development of the same catamaran craft, coinciding with a median axis x.

Preferably, each catamaran craft 1a and 1b presents a control station (namely a wheelhouse) 110 suitably connected to the means 4a, 4b, 5a and 5b so as to control direction and speed of advance of the catamaran craft 1a and 1b and, in particular, of the catamaran boat .

Said motor means 4a, 4b comprises, for each catamaran craft 1a and 1b, an azimuth thruster provided in the respective bow area 2a, 2b, while said directional means 5a, 5b comprises, for each catamaran craft, a rudder blade provided in the respective aft area 3a, 3b.

The motor means 4a, 4b comprises an azimuth thruster, conveniently, adapted to rotate on a thrust axis 4c preferably substantially perpendicular to the supporting surface thus varying the direction of the thrust force.

The directional means 5a and 5b comprise a rudder blade, suitably, adapted to rotate on a directional axis 5c preferably substantially perpendicular to the support surface thus varying the direction of advance.

The axes 5c and 4c are substantially parallel to each other, in particular, lie on a plane almost parallel to the median axis x. Preferably, the axis 4c, 5c and x, lies substantially on a single plane.

The means 4a, 4b, 5a and 5b and, in particular, the azimuth thruster and the rudder blade are adapted to rotate independently one another as to allow each catamaran craft 1a and 1b and, therefore, the catamaran boat 1 to selectively move along a transverse direction and, in some cases, perpendicular to the median axis x, advance along the median axis x, almost to roto-translate and, in detail, almost to rotate.

The hull of each catamaran craft 1a, 1b comprises a supporting structure 6, consisting of a bridge and, preferably, of a superstructure formed by the sidewalls 7and a ceiling 8.

The structure of the aft area 3a, 3b of each catamaran craft 1a, 1 b is plain and is opportunely tightened to accommodate the coupling means and the required bodies for coupling.

Each catamaran craft 1a, 1b also comprises two side hulls 100 on which it is leaned and among which the structure 6 essentially underlies.

The side hulls 100 of each craft 1a, 1b have an extremity defining a contact face 100a and 100b adapted to make contact with the respective contact face 100b and 100a of the other catamaran craft 1a and 1b; and, suitably, the other extremity tapered so to facilitate the movements of the catamaran boat 1 and/or of the single catamaran craft 1a and 1b.

The contact faces 100a and 100b are parallel between them and, in detail, substantially conforming to each other in shape so as to lean mutually and, therefore, facilitate the linkage between the catamaran crafts 1a and 1 b.

It is shown how the means 4a, 4b, 5a and 5b are preferably constrained to the supporting structure 6 and, suitably, placed between the side hullslOO.

With reference to Figs. 4, 5 and 7, each catamaran craft 1a, 1b comprises two transverse bulkheads 9a and 9'a, 9b and 9'b, placed at the last two structural frames of the supporting structure 6 confined in the aft area 3a, 3b.

Such bulkheads 9a and 9'a, 9b and 9'b, identify a compartment 29a, 29b at the end of the stern 3a, 3b of each single catamaran craft 1a, 1b where must take place all joining operations in order to obtain a single catamaran boat 1. Through appropriate structural stiffening located in the compartments 29a, 29b, on the bulkheads 9'a, 9a, 9b and 9'b the stresses that are produced once the catamaran crafts 1a and 1b are assembled are discharged.

Said first catamaran craft 1a and said second catamaran 1b each comprise coupling means for their mutual stable coupling, obtained matching the relative sterns 3a, 3b, in a transversal junction plane Π (Figs. 1 , 2a, 2b, 3a and 3b and 6). The contact takes place between the two outer stern bulkheads 9a, 9b of each catamaran craft.

Said coupling means comprise:

- alignment means adapted to make coaxial said first and second catamaran craft 1a, 1b;

- coupling means for said first and second catamaran craft 1a, 1b;

- locking means adapted to make stable and rigid the coupling of said first and second catamaran craft 1a, 1 b; and, suitably,

- connectors adapted to allow a passage data/energy between the catamaran crafts and, therefore, to a control station to control all directional and motors means of a catamaran boat;

In addition the coupling means preferably comprise at least one gasket adapted to interpose between the units 1a and 1b avoiding the entry of water between the catamaran crafts when mutually bounded by coupling means and especially to compensate possible tolerance as well as deformations of the contact bulkheads. With particular reference to Figs. 6 and 7, said alignment means comprise means of shape-coupling provided on the respective bulkheads 9a, 9b of the external area of the stern 3a, 3b of each catamaran craft 1a, 1b.

Said form coupling means work in correspondence of said junction transverse plane Π.

Each catamaran craft 1a, 1b comprises, on its external stern bulkhead 9a, 9b and, in particular, on the contact faces 100a and 00b, a truncated pyramidal structure 10a, 10b which protrudes toward the outside of the stern 3a, 3b and a recess conformed 11a, 11b proceeds instead in the same stern. Said truncated pyramidal structure 10a, 10b and said recess conformed 11a, 11b have complementary section so as to cooperate with sliding of the respective inclined planes during the headway action.

Therefore, the first catamaran craft 1a comprises on a contact face 100a a truncated pyramidal structure 10a and on the other contact face 100a a recess conformed 11a; while the second catamaran craft 1b comprises on a contact face 100b a structure like a truncated pyramidal and on the other face 10b of contact 100b a recess conformed 11b.

It is highlighted that on the structures 10a and 10b could be arranged the connectors, so that, when the catamaran craft 1a and 1b are joined, the joined connectors realizes a data transfer/energy between the catamaran craft 1a and 1b. Alternatively, they may be placed on bulkheads 9a and 9'a, 9b and 9'be, suitably, above the waterline of the boat catamarana 1.

Moreover, each catamaran craft 1a, 1b may comprise, suitably placed on the external stern bulkhead 9a, 9b, at least one gasket adapted to engage itself on the other gasket placed on the other units 1a and 1b so as to hermetically seal the catamaran boat 1 , compensating deformations.

Preferably, the gasket, housed within a suitable recess on the stern bulkhead, is placed along a first semi-perimeter of the first unit 1a and along a second semi- perimeter of the second unit 1b so that, when the units are mutually bonded by the coupling means, the two gaskets are distributed along all the perimeter hermetically sealing the catamaran boat 1 , compensating deformations.

Once the two catamaran crafts 1a, 1 b are coupled, the truncated pyramidal structure 10a of said first catamaran craft 1a will be inserted in the recess conformed 11b of said second catamaran craft 1b, while the recess 11a of said first catamaran craft 1a will host the truncated pyramidal structure 10b of the second catamaran craft 1b. In this way the two sterns 3a, 3b will match each other, preferably substantially perfectly, the respective median axes x of the catamaran crafts 1a and 1b will coincide and the entire catamaran boat 1 will thus be substantially symmetrical with respect to the transverse plane of junction Π.

With particular reference to Figs. 7, 8 and 9, said coupled means comprise a movable hook 12a, 12b provided on each catamaran craft 1a, 1b and adapted to interact, orthogonally to said junction plane transverse Π, with a respective retention cuneiform element 13a, 13b provided on the opposite catamaran craft. When the two catamaran crafts 1a, 1 b are operating separately, each hook 12a, 12b is housed inside a suitable place 14a, 14b formed in the compartment 29a, 29b defined by the stern bulkheads 9a and 9'a, 9b and 9'b, of the respective catamaran craft (Fig. 7), while in the use said hook 12a, 12b is adapted to be disposed, rotating, orthogonally to the respective outer stern bulkhead 9a, 9b (Fig. 8).

Said hook 12a, 12b is constituted by an arm 15a, 15b fitted with a hooked end 16a, 16b, and is connected to the opposite end to a sliding hinge 17a, 17b in the stern compartment 29a, 29b.

Said restraining element 13a, 13b is as the same time provided along a vane 18a, 18b realized at the compartment 29a, 29b of each catamaran craft 1a and 1b. The coupling takes place when said arm 15a, 15b, sliding in said seat 18a, 18b, reaches with its hooked end 16a, 16b said retention element 13a, 13b and engages itself as shown in Fig. 9 .

Once the hooked tail of the arm 16a, 16b has overcome said retention element 13a, 13b and, a hydraulic piston 19a, 19b, provided at the opposite end of the hook arm, through the hinge sliding 17a, 17b, exerts a traction force in approaching such as to keep the two sterns 9a, 9b, and then the two catamaran craft 1a, 1b, tightened among them.

Said locking means comprise a panel 20a, 20b pivotally associated on the left of each catamaran craft 1a, 1b and adapted to be stably fixed on the opposite catamaran craft 1a, 1 b (Figs. 7, 10, 11).

Said panel 20a, 20b is associated, through a hinge with a vertical axis 21a, 21 b, to the outside of the structural bulkhead 9'a, 9'b facing the stern.

Said panel 20a, 20b, by rotating about said hinge 21a, 21b, is adapted to be fixed stably on the whole both of the two aft bulkheads 9a and 9b that the structural bulkhead 9'a, 9'b facing the aft one, on the opposite catamaran craft. In this way both structural compartments 29a, 29b of the two opposite catamaran craft 1a, 1b working together in equal measure to the effort generated by the assembly.

The same function of stable fixing between the catamaran craft 1a, 1b is ensured also by additional locking means realized with a hook jaw 22a, 22b provided within the coverage plan 8 of the hull of each catamaran craft (Figs. 10- 14).

Said hook is substantially constituted by a lever arm 23a, 23b to one end of which is provided with a jaw 24a, 24b adapted to cooperate engaging a corresponding retention element 25.

Said retaining element is obtained by a suitable shaping 26a, 26b of the upper portion of each exterior stern bulkhead 9a, 9b in such a way that, in the mating position, the two shaped portions 26a and 26b, matching between them, realize a semi-cylindrical retaining element 25 perfectly engaged by the respective jaw tightening.

Said rectilinear lineament with a semi-cylindrical geometry 25 is therefore the result of the combination of the two external bulkheads 9a, 9b of the stern of each catamaran craft 1a, 1b and is positioned on their upper extremity.

Once hooked, a hydraulic piston 27a, 27b provided at the opposite end of the lever arm 23a, 23b allows to exercise a grip such as to tighten said jaw 24a, 24b around said retention element 25 and maintain tight, one against the other, the projecting portions 26a, 26b of the two external stern bulkheads 9a and 9b (Fig. 14), thus adding a further locking element to the two catamaran crafts 1a, 1b and ensuring a pair still more stable and safe.

The assembling of the catamaran boat 1 takes place in three distinct phases:

- approaching of said first and said second catamaran craft 1a, 1b (Fig. 6),

- aligning and coupling of the two catamaran crafts 1a, 1 b (Figs. 6, 8 and 9);

- looking stable and secure of the two catamaran craft 1a, 1b to realize the single catamaran boat 1 (Figs. 10, 11).

The approaching operation between the sterns of the catamaran crafts 1a, 1b, before the mechanical coupling, can be performed with the aid of the motor means and the directional means. The azimuth thruster at the bow and the rudder blade at the stern of each catamaran craft act in synergy allowing, even with little headway, the correct positioning of the two catamaran crafts, and the mutual alignment, so that the respective median axes x, which are extended along the longitudinal direction of development of each catamaran craft, coincide (Fig. 6). The optimal conditions to perform them approaches maneuvers provide calm water and are therefore to be executed in port areas.

During the aligning operation, an operator disengages the hooks 12a, 12b of the two catamaran crafts 1a, 1b from their vanes, by turning them up to arrange them in a horizontal position, at right angles to the respective draft bulkheads. This operation could also be automated (Figs. 7 and 8).

When the complete rotation has been operated, from each catamaran craft 1a, 1b protrudes the hook 12a, 12b of the coupling at the stern, according to the direction of longitudinal development.

In the early stages of approaching, the headway allows to the extended hooks to slide inside the corresponding seats 18a, 18b formed in the bearing structure of the opposite catamaran craft 1a, 1 b up to achieve the holding elements 13a, 13b. Once, thanks to headway, the two hooks are inserted in their vane and they have hooked the holding elements, the operator actuates the electric or hydraulic system which, by moving the piston 19a, 19b of each arm, close the hooks on the relative holding elements (Fig. 9) bringing into stable contact the two catamaran craft.

To guarantee the final centering the two pyramidal structures 10a, 10b projecting from stern bulkheads of each catamaran craft are inserted into the corresponding opposing recesses 11a, 11b, avoiding the dangers of accidental rotations and misalignments and, preferably, contributing to the transfer of shear stresses.

After the centering phase, the two catamaran crafts 1a, 1b are perfectly combined with the stern bulkhead matching to define the cross junction plane Π.

The target of the locking phase is to ensure the relative position reached by the aligning on a stable, structurally safe and definitive manner, in order to consider the catamaran boat so assembled a single unit from the architectural point of view (Figs. 1 , 10 and 11).

In the example primary for locking has been considered the actuation of the revolving panels and secondary the tightening of the coupling jaws. Nothing would change if the drive of the elements were reversed.

The panels 20a, 20b of each catamaran craft 1a, 1b are disengaged from their vanes and made to rotate around their hinges with a vertical axis 21a, 21b up to adhere to the opposite side of the catamaran craft engaging to it in correspondence of its structure, in particular on structural bulkheads defining the compartments 29a, 29b.

After the rotation of the panels, they act the jaws 24a, 24b.

When the locking is completed the two catamaran craft are a single catamaran boat with on board systems manageable by a single control station 110, wheelhouse, chosen by the commander among the two available.

Each board system (sprinkler system, bilge system, fresh water system, sewage system, electrical system, fuel system, etc.) is designed in a modular way, with control units placed in the control station 110, as to take indifferently the function of master or slave.

The captain can choose the control station 110 between the two existing and equivalent, simply according to the specific mission, and from the same he can have access to all onboard systems, comprising propulsion.

The catamaran boat 1 assembled is in fact equipped with two azimuth thrusters 4a, 4b, arranged at the ends of the resulting hull. The rudder blade 5a, 5b in this configuration remain locked in position along the longitudinal axis of the catamaran boat and therefore do not cooperate to the motion. The captain, with the aid of a joystick, decides the maneuvers to be executed. A suitable control system, depending on the physical and geometrical characteristics of the catamaran boat, can act on the motors according to the maneuver, by imposing on them thrust and rotation.

In detail, the azimuth thrusters of said first and second catamaran craft can rotate on their respective axes either independently or in a coordinated and dependent way for moving said catamaran craft.

By way of example, the fundamental maneuvers that can perform the catamaran boat 1 are reported: translation, turning and turning on site.

During translation, the catamaran boat 1 moves his center of gravity along a straight line while maintaining the fore-aft direction constant. The angle between the movement direction and the fore-aft direction may vary between 0 and ± 180°. To drive along a straight line it is necessary to rotate both thrusters by the same angle, both in module and in sign.

During the turn, the catamaran boat 1 moves his center of gravity on a tangent to the curve while maintaining the same fore-aft direction. To make a turn the two thrusters can act dependent or independent from each other. In the case of dependence both will rotate by the same angle in module, but with opposite direction. In the case of independence the azimuth thrusters will rotate with different angles in modulus and sign. A particular case of turn can be obtained by rotating a thruster only.

Finally, during the rotation on site, the boat catamarana, with center of gravity fixed, rotates the fore-aft direction: to perform a rotation on site both the thrusters must be rotated of the same angle equal to 90°, in opposite directions.

Optionally, the catamaran boat 1 comprises, in addition to catamaran craft 1a and 1b, one or more intermediate catamarans craft 1c adapted to be interposed between the catamarans craft 1a and 1b and, therefore, to further increase the load capacity of the catamaran boat 1. in this case, the catamaran boat 1 is obtained by the stable coupling of two catamaran craft 1a, 1b substantially identical, and, among the catamaran craft 1a and 1b, one or more intermediate catamaran craft.

Each intermediate catamaran craft 1c comprises an intermediate catamaran hull and defines an intermediate bow, an intermediate transom and an intermediate middle axis. In particular, it is a multihull and comprises two intermediate lateral hulls 28e, an intermediate support structure 29 coated by intermediate sidewalls and an intermediate ceiling.

In some cases the intermediate catamaran craft 1c may comprise an intermediate control station and at least one, among intermediate motor means and intermediate directional means, placed on the bow and/or on the stern and substantially similar to the aforesaid means 4a, 4b, 5a and 5b of the catamaran craft 1a and 1 b. Preferably, the intermediate catamaran craft 1c comprises a control station and intermediate motor means and intermediate directional means places on opposite sides, that are fore and aft.

In addition, each intermediate craft catamaran 1c comprises, at the intermediate bow and stern, the intermediate coupling means able to allow to link intermediate craft to the catamaran craft 1a and 1 b and/or one or more intermediate catamaran craft.

The intermediates coupling means comprise:

- intermediate aligning means adapted to make coaxial either a craft 1c with catamaran craft 1a and 1b and, if more than one intermediate catamaran craft 1c are present, the same intermediate catamaran craft 1c;

- intermediate coupling means for said first and second catamaran craft 1a, 1b;

- intermediate locking means adapted to make stable and rigid the coupling between craft 1c with at least one of the catamaran craft 1a and 1b and, if present more intermediate catamaran crafts 1c, between the same intermediate catamaran craft 1c; and, suitably,

- intermediate connectors and, more suitably,

- and, optionally, at least one intermediate seal both arranged to interpose between a craft 1c and at least one of the catamaran craft 1a and 1b and, if present more intermediate catamaran crafts 1c, between a pair of intermediate catamaran craft 1c avoiding the entry of water between the craft when mutually constrained by joining means and, preferably, compensating the deformations.

The intermediates coupling means are similar to the coupling means of the catamaran craft 1a and 1b. In detail, the intermediate aligning means are substantially analogous to the above described aligning means 10a, 10b, 11a, 11 b, the intermediate coupling means are substantially analogous to the above described coupling means 12a, 12b, 13a, 13b, 14a, 14b, 15a, 15b , 16a, 16b, 17a, 17b, 18a, 18b, 19a, 19b. Intermediates locking means are substantially similar to the above-described locking means 20a, 20b, 21a, 21b, 22a, 22b, 23a, 23b, 24a, 24b, 25, 26a, 26b, 27a, 27b; the intermediate connectors are substantially similar to the above-described connectors; and the intermediate gasket is substantially similar to the above-described gasket.

Advantageously, as illustrated in Fig. 15, an intermediate catamaran craft 1c may comprise at least one additional intermediate hull 30 adapted to improve the stability of the catamaran boat 1. In particular, the intermediate catamaran craft 1c comprises at least one and, to be precise, exactly two intermediate additional hulls 30 located externally to the intermediate side hulls 28 and, in particular, on opposite sides of the intermediate side hulls 28, so as to enclose between them the same intermediate side hulls 28.

Said additional intermediate hulls 30 have a section that can suitably be smaller than the intermediate section of the side hulls 28.

The additional intermediates hulls 30 properly have a length smaller than the length of the intermediate side hulls 28. Alternatively, the additional intermediates hulls 30 suitably have a length at least equal and, specifically, greater than, the length of the intermediate side hulls 28.

Finally, in some cases, with reference to Figg.16 and 17 the catamaran boat 1 comprises a only catamaran craft acting independently and defining a bow 2, a stern 3 and a median axis x.

The catamaran craft comprises a catamaran hull and, in detail, two side hulls 100; a supporting structure 6 connecting the side hulls 100 and defining a supporting surface; motor means 4 adapted to generate a thrust force of the catamaran craft/boat and selectively placed in the bow 2 or stern 3; and directional means 5 adapted to define, properly together with the motor means 4, the direction of advance of the catamaran craft and, therefore, the catamaran boat 1 and placed on the opposite side of the motor means 4 and, therefore, selectively at the stern 3 or bow 2.

Particularly, the motor means 4 are at the bow 2 and the directional means 5 at the stern 3 (Figs. 17a and 17b). Alternatively, the motor means 4 are at the stern 3 and the directional 5 at the bow 2 (Figs. 16a and 16b).

The motor means 4 and directional means 5 are constrained to the structure 6 and, preferably, placed between the side hulls 100 and, more preferably, along the median axis x.

The motor means 4 comprise an azimuth thruster, conveniently, adapted to rotate on a thrust axis 4c substantially perpendicular to the supporting surface, thus changing the direction of the thrust force.

The directional means 5 comprise: a rudder blade, properly, arranged to rotate on a directional axis 5c substantially perpendicular to the supporting surface thus varying the direction of advance.

The axes 5c and 4c are substantially mutually parallel, in particular, they lie on a plane substantially parallel to the median axis x. Preferably, the axis 4c, 5c and x lie substantially on a single plane.

The axes 5c and 4c are substantially normal to the supporting surface.

The means 4 and 5 and, in particular, the azimuth thruster and the rudder blade are adapted to rotate independently one another, so as to allow the catamaran boat 1 selectively moving along a transverse direction and, in some cases, normal to the median axis x, advancing along the x axis or, almost roto-translating and, in particular, substantially rotating.

Preferably, the catamaran craft has a control station, wheelhouse, 0 suitably connected to the thrust means 4 and directional means 5 so as to command its direction and speed of advance and, therefore, said means.

The supporting structure 6 is called the bridge and is subtended/underlying between the side hulls, it connects the hulls themselves defining a supporting structure. A structure, called superstructure, can be bound to the bridge from the top and formed by sidewalls 7 and a ceiling 8.

The side hulls 100 have both ends with a shape of known type and, in particular, tapered so as to facilitate the movements of the catamaran craft and, therefore, of the catamaran boat 1. Alternatively, the side hulls 100 have, as shown in Fig. 18, one end, preferably the bow 2, tapered and the other end, preferably the stern 3, non-tapered and, in particular, terminating with a flat face suitably and substantially perpendicular to the waterline.

The invention is susceptible of variations falling within the scope of the inventive idea. All of the details can be replaced by equivalent elements, and the materials, shapes and sizes can be of any nature and magnitude.

For example, the coupling means and the locking means may substantially coincide and, in particular, comprise at least one compression fitting (Figs. 18, 19a, 19b).

Additionally, the units 1a and 1 b may comprise additional reference means able to prevent a relative movement between the catamaran crafts 1a and 1 b along a plane perpendicular to the axis x so as to allow the compression fitting to work almost exclusively for compression.

In particular, the first catamaran craft 1a, as shown in Fig. 18, comprises at least one first compression fitting 31 a disposed at the stern 3a. Preferably, the first catamaran craft 1a comprises two first compression fittings 31a placed at stern 3a.

The first compression fitting 31a, as well as the second 31 b, comprises a first coupling pin 311 b integral with the second catamaran craft 1 b; a first boom 312a having one end hinged to the first catamaran craft 1a; a first additional arm 313a provided with a first hook 314a committed to the first pin 311 b and having the end, opposite to said first hook 314a, hinged to the first boom 312a; and a first linear actuator 315a having one end hinged to the first catamaran craft 1 a and the other to the point of pivoting between the first arms 312a and 313a.

The first pin 311 b is disposed in a second vane 18b.

The first arms 312a, 313a, the first hook 314a and the first linear actuator 315a are placed in a first seat 18a.

The first linear actuator 315a controls, as a function of its length variation (preferably an elongation), a mutual rotation of the first arms 312a and 313a respect to the first catamaran craft 1a.

Said rotation leads the first hook 314a outside the first seat 18a by placing it in the second seat 18b and, then, committing it to the first pin 311b.

Such commitment of the first hook 314a to the first pin 311 b defines an articulated triangle in which the first boom is hinged, at its ends, to the first catamaran craft 1 a and the first supplementary arm 313a which, in turn, is hinged through the first hook 314a to the first pin 311 b and, then, to the second catamaran craft 1 b (Fig. 19a).

At this point, the first linear actuator 315a performs a new length variation opposite to the previous one (preferably a contraction).

The contraction of the first linear actuator 315a imposes on first arms 312a and 313a a rotation in the opposite direction that combines and binds jointly the second catamaran craft 1 b to the first catamaran craft 1a (Fig. 19b).

The second catamaran craft 1 b, as shown in Fig. 18, comprises at least one compression fitting 31 b arranged/placed at the stern 3b and, in particular, two compression fittings 31 b placed at the stern 3b.

The second compression fitting 31 b comprises a second pin 311a integral with the first catamaran craft 1a; a second boom 312b having one end hinged to the second catamaran craft 1 b; a second additional arm 313b equipped with a second hook 314b committed to the second pin 311a and having the end, opposite to said second hook 314b, hinged to the second boom 312b; and a second linear actuator 315b having one end hinged to the second catamaran craft 1b and the other to the point of pivoting between the second arms 312b and 313b.

The second pin 311 a is disposed in a first seat 18a.

The second arms 312b, 313b, the second hook 314b and the second linear actuator 315b are placed in a second seat 18b.

The second linear actuator 315b controls, as a function of its length variation (preferably an elongation), a mutual rotation of the second arms 312b and 313b respect to the second catamaran craft 1 b.

Said rotation leads the second hook 314b outside the second seat 18b by placing it in the first seat 18a and, then, committing it to the second pin 311a. Such commitment of the second hook 314b to the second pin 311 a defines an articulated triangle in which the second boom 312b is hinged, at its ends, to the second catamaran craft 1b and the second additional arm 313b which, in turn, is hinged, through the second hook 314b to the second pin 311 a and, then, to the first catamaran craft 1a (Fig. 19a).

At this point, the second linear actuator 315b performs a new length variation opposite to the previous one (preferably a contraction).

The contraction of the second linear actuator 315b imposes on second arms 312b and 313b a rotation in the opposite direction that combines and binds solidly the first catamaran craft 1a to the second catamaran craft 1 b (Fig. 19b). The additional reference means of each catamaran craft 1a, 1 b comprise on its external stern bulkhead 9a, 9b an additional truncated pyramid structure that protrudes to the outside of the stern 3a, 3b and a supplementary recess complementarily to the additional truncated pyramid structure so as to house inside the additional truncated pyramid structure, preventing a relative movement between the catamaran crafts 1a and 1 b along a plane perpendicular to the median axis x.

The additional truncated pyramid structure and the supplementary recess have complementary section so as to cooperate substantially by contact of the respective inclined planes during the headway.

Claims

C LA I MS

1. A catamaran boat (1) characterized in that it comprises:

- a first catamaran craft (1a) that works independently, having a main direction of longitudinal development along a median axis (x) and comprising a bow (2a), a stern (3a), motor means (4a) and direction means

(5a);

- a second catamaran craft (1 b) that works independently, having a main direction of longitudinal development along a median axis (x) and comprising a bow (2b), a stern (3b), motor means (4b) and direction means (5b),

- wherein both said first catamaran craft (1a) and said second catamaran craft (1b) comprise coupling means for their mutual stable connection, obtained by fitting their sterns together (2a, 2b), on a transverse junction plane (Π), in order to realize said catamaran boat (1) adapted to work as a single unit.

2. The catamaran boat (1) according to claim 1 , characterized in that:

- said motor means (4a, 4b) comprise an azimuth thruster, provided on each catamaran craft (1a, 1b) at bow (2a, 2b);

- said direction means (5a, 5b) comprise a rudder blade provided on each catamaran craft (1a, 1b) at stern (3a, 3b),

- wherein said motor means (4a, 4b) and the direction means (5a, 5b) are provided along said median axes (x).

3. The catamaran boat (1) according to claim 1 , characterized in that said first catamaran craft (1a) and said second catamaran craft (1b) are identical and the hull resulting from their coupling is substantially symmetrical with respect to the transverse junction plane (Π).

4. The catamaran boat (1) according to claim 1 , characterized in that said coupling means comprise:

- aligning means (10a, 10b, 11a, 11b) adapted to make the first (1a) and the second (1b) craft coaxial;

- coupling means (12a, 12b, 13a, 13b, 14a, 14b, 15a, 15b, 16a, 16b, 17a, 17b, 18a, 8b, 9a, 9b) for said first (1a) and second craft (1b);

- locking means (20a, 20b, 21a, 21b, 22a, 22b, 23a, 23b, 24a, 24b, 25, 26a, 26b, 27a, 27b) adapted to make the coupling of said first (1a) and second craft (1 b) stable and rigid.

5. The catamaran boat (1 ) according to claim 4, characterized in that said aligning means comprise shape-coupling means (10a, 10b, 11a, 11b) provided at said sterns (3a, 3b).

6. The catamaran boat (1) according to claim 4, characterized in that said coupling means work along the main direction of longitudinal development of said first (1a) and said second (1 b) craft and include a movable hook (12a, 12b) provided on each craft, adapted to interact with a respective retaining element (13a, 13b) provided on the opposite craft.

7. The catamaran boat (1) according to claim 4, characterized in that said locking means comprise a panel (20a, 20b) rotationally associated with each craft (1a, 1 b) and adapted to rotate in order to be firmly fixed to the opposite craft (1b, 1a).

8. The catamaran boat (1 ) according to claim 4, characterized in that said locking means comprise a jaw hook (22a, 22b) provided a cover wall (8) of each craft (1a, 1 b) and adapted to engage a respective retaining element (25) obtained by the coupling of said first (1a) and said second (1b) craft.

9. The catamaran boat (1) according to claim 8, characterized in that said jaw hook (22a, 22b) comprises a hydraulic piston (27a, 27b) adapted to exert a force to the jaw in order to clasp said retaining element (25).

10. The catamaran boat (1) according to claim 2, characterized in that the azimuth thrusters (4a, 4b) of said first (1a) and said second (1b) craft rotate independently around their axis to ensure the handling of said craft (1).