WO2010091485A2

WO2010091485A2 - Portable boat

Info

Publication number: WO2010091485A2
Application number: PCT/BR2009/000036
Authority: WO
Inventors: Mateus Frois Santa Catarina
Original assignee: Mateus Frois Santa Catarina
Priority date: 2009-02-13
Filing date: 2009-02-13
Publication date: 2010-08-19
Also published as: WO2010091485A3

Abstract

The present invention refers to a portable boat which can be arranged in order to be propelled by pedal (11 ) or an electrical engine and comprising inflatable hulls (6) combined to a tubular frame which permits the boat to be compacted as backpack providing an easy way of carrying it. The portable boat is compact dimensioned to permit being transported inside a car trunk.

Description

PORTABLE BOAT

The present invention refers to a portable boat which can be arranged in order to be propelled by pedal or an electrical engine and comprising inflatable hulls combined to a tubular frame which permits the boat to be compacted as backpack providing an easy way of carrying it. The portable boat is compact dimensioned to permit being transported inside a car trunk.

Many inventions related to boats conceived to provide a functional and compact product in order to facilitate transport and storage are known from the prior art.

Patent document CA2069605C refers to a set which can be adapted to a normal bicycle in order to provide a pedal propelled boat. This set can de disassembled and stored inside a bag. There is a product in the market based on the above mentioned patent and it is called "Shuttle Bike". A disadvantageous aspect of the above invention comprises the corrosion exposure of the bike parts due to the fact that bike parts are not made to be used under corrosion conditions, especially salty water. Bike parts exposure to such conditions causes rust degradation.

The patent document FR2829742 refers to a boat which is propelled by pedal arranged in a bike like frame which is fixed in a pair of floats in a catamaran like configuration. A disadvantageous feature of this invention is that the set is not able to be assembled/disassembled in order to provide a smaller volume (it is not a portable boat). Another disadvantageous feature is the driving ability which is performed by a helm and, therefore, the boat driving ability is not as good as boats having a propeller axis which is able to direct the propelling push to the left or to the right.

The patent document US4648846A1 refers to a boat which is pedal propelled and comprises a tubular frame which is connected to a pair of inflatable hulls. The frame can be folded to reduce the storage volume. However, the propulsive system is very complex and very cost effective for a large scale production.

All the above mentioned patent documents, which are very representative of the present art, describe inventions having one or more of the following disadvantages which the present invention aims to overcome:

- High production cost;

- Transport and storage problems;

- Low efficiency;

- Low driving ability; and

-Having premature failure and/or degradation parts.

The main objective of the present invention is to provide a boat which can be able to be propelled by means of pedals or an electric engine and also being portable. Therefore, the present invention must be light, operationally simple and provide an easy assembling/disassembling process. The boat must comprise an easy fit condition when transport is considered, for example, by means of train, planes and cars. Car trunk transportation must be particularly aimed. Therefore, a reduced volume when disassembled must be an important feature of the present invention. The volume of the disassembled boat must be reduced in order to fit inside a car trunk and the disassembled boat must have a shape and parts to permit an easy handling. Therefore the shape of the disassembled boat must be a backpack like configuration, permitting the user to carry it on his back. The boat must have strength and be reliable when in use and also must be able to resist to corrosive environment, like salt water. The boat must have an easy maintenance.

The boat must be stable, to resist to wave swing, and have a good driving ability to provide a good driving control to the user. The present invention must have high hydrodynamics efficiency in order to permit high speed, optimizing the propulsive energy and offering a good speed sensation to the user. Finally, to provide commercial acceptance of the boat, a low final cost must be aimed.

Such desired features lead to the following conditions that the present invention must match: 1 - Be Light weighted;

2- Have an easy assembling/disassembling and operation process; 3 - Fit inside a car trunk; 4 - Have a backpack like configuration when disassembled;

5 - Be strong, reliable and provide an easy maintenance;

6 - Be able to resist to a corrosive sea water environment;

7 - Be stable;

8 - Have a good driving ability;

9 - Have a good hydrodynamics efficiency; and

10 - Have low production cost.

The present invention is provided under above conditions.

At first, to meet lightweight and compact fitting conditions, inflatable hulls have been provided. Catamaran like configuration was chosen to best meet stability and hydrodynamics efficiency requirements.

The propeller is the most efficient mechanism for boat propulsion. Therefore the present invention uses a propeller. Helm is a device which is commonly used for boat driving but it is less effective under low speed conditions. To maximizing the driving ability at all operational speeds and to minimize the amount of parts, a helm is not included in the present invention. The propeller axis is able to rotate in such a way to direct the water push to the right or to left. The propeller is vector configured hereinafter called vector propeller.

The vector propeller positioning is another parameter that influences the driving ability. It must be placed as far as possible from the pivot axis, which is the vertical axis relative to which the boat rotates when the direction is shifted. It maximizes the turning torque increasing the boat's response. In the present invention, the boat has a pair of hulls in a catamaran like configuration. Therefore the pivot axis is positioned between the hulls at the central region. For this configuration, the vector propeller position which provides the better driving ability is at the rear part and far from the boat central area. This vector propeller position was adopted in the present invention.

Tubular frame was selected for high stiffness and low weight and also to permit engagement that facilitate assembling/disassembling. In the pedal configuration, the driver is positioned in the seat and starts a pedal working which, by means of 90° conical gears, transmits and multiply rotational movement to the propeller, positioned at the rear. Pedaling on the normal rotation sense, the propeller pushes the boat forward. The reverse pedaling makes the propeller moves the boat backwards. The propeller is positioned at the end of a tube inside which transmission axis works. The propeller is positioned about to 1.8 meters length from pedals. Therefore, the propulsive set must be able to be reduced at half this size for transport and storage ends. There are basically two ways of achieving this in a simple fashion: 1 - permit the second half of the tube being telescopically retracted; and 2 - articulating the tube in its intermediary position.

In relation to the first way, the second half tube has a diameter which is smaller than the first half tube in order to permit telescopically retraction and thus reducing the length of the propulsive set in a half for transport and storage ends.

In relation to the second way, the tube is articulated in its intermediary position, reducing the size of the propulsive set in a half for transport and storage ends.

In the electric engine configuration, a support is provided at the rear part of the boat's main frame. At the rear end of such support an electrical tail support is provided. Battery is positioned at the main frame so that such battery does not need to be removed for transport and storage ends. The electric engine speed control is inserted in the right handle and it is provided with an acceleration trigger, in such manner that the engine only works when the trigger is pushed. Thus, if the driver is out of the boat, there is no risk of accidental boat propelling.

For both configurations, the propeller axis can be rotated to the left or to the right, directing the push force for driving. This rotation is controlled by the driver by means of the right handle which is able to rotate around an axis having a lever mechanically connected by means of a shaft to another lever at the tail. Therefore, when the handle is spun, the propeller axis is also spun and the push force is directed providing good driving ability. Propulsive set are sealed, avoiding water, sand or another particle contamination. The driver is positioned in a seat having an articulated backseat. Therefore, such backseat can be lowered for transport ends and also to provide a backpack shape which is easy for carrying. This approach is totally new and it comprises the core of the present invention. The simplicity of the present invention permits a reduced production cost. Maintenance is simplified and requires a simple training to be put in practice. The present invention also comprises a support connection for accessories, such as basket, water bottle support, flags, advertisement panels, etc. As an accessory example, a roof has been specially designed for this boat and such roof can be compacted into a small volume to facilitate transport and storage.

The following concerns to a potential marketing analysis of the present invention.

There is a great number of persons living in apartments or even houses, in locations near beaches, lakes, rivers, coast islands, etc. who have economical conditions to acquire a nautical product for leisure, but without storage space to accommodate the current available products in the market. Such peoples comprise a great unexploited potential market, waiting for a portable, clean, efficient and low cost nautical product to create a huge demand process.

Earth surface is full of rivers, lakes and coast islands.

This wide landscape justifies a potential necessity for products which permits a clean exploration, and provides a way of enjoy natural beauties with health benefits to the user. This picture provides a remarkable market potential.

The present invention can be used in expeditions permitting run water surfaces with high efficiency. It can be transported inside a car trunk when a family is out for vacations, days off, etc. permitting water surface utilization. When the boat is compacted in a backpack configuration it can be stored in a small place, for example, under a bed.

The present invention can be used by lifeguard teams, replacing longboards. It can also be used in support team of aquatic marathon, triathlon competitions, etc. replacing kayaks.

The present invention permit that lifeguards have his hands free to operate buoys and others devices and the catamaran like configuration has great stability, permitting that the lifeguard remove victims without leaving the boat.

Many potential customers are middle class people living near beaches, rivers, lakes, lagoons, and coast islands. Such places, which comprise the most valuable areas, are the home of high financial condition people. The product is directed to all ages, similarly to bicycles, but balance is not necessary. Short scale models can be provided for children.

Compact shape associated to low weight reduces cost related to the product transportation, being ideal for internet commerce.

The preferred configurations of the invention are now described as non limitative examples and in association to the figures below:

Figure 1 is a perspective view of common parts of several different configurations according to the present invention;

Figure 2 is a perspective view of a boat according to the present invention in a pedal propelled embodiment;

Figure 3 is a perspective view of a boat according to the present invention in an electric engine propelled embodiment according to the present invention;

Figure 4 is a perspective view of the main structure of a boat according to the present invention;

Figure 5 is an exploded perspective view showing the backseat mounting of a boat according to the present invention;

Figure 6 illustrates sequenced mounting steps of restoring arms according to the present invention;

Figure 7 is an exploded perspective view showing handle mounting of a boat according to the present invention;

Figure 8 illustrates sequenced mounting steps of square shaft fixing of a boat according to the present invention;

Figure 9 illustrates sequenced fixing mechanism of connection bars to the main structure of a boat according to the present invention; Figure 10 illustrates sequenced pictures showing fixing mechanism of inflatable hulls in the connection bars of a boat according to the present invention;

Figure 11 comprises pictures showing mounting sequence of seat cover of a boat according to the present invention;

Figure 12 is a perspective view showing a pedal driven telescopic propulsive set according to the present invention;

Figure 13 is a perspective view showing a gearbox of a pedal driven propulsive set according to the present invention;

Figure 14 comprises sequenced pictures showing a crank set mounting of a pedal driven propulsive set of the present invention boat;

Figure 15 illustrates sequenced pictures showing crank set mounting in a gearbox of a pedal driven propulsive set of a boat according to the present invention;

Figure 16 illustrates sequenced pictures showing 90° conical gears mounting of a pedal driven propulsive set of a boat according to the present invention;

Figure 17 illustrates an exploded perspective view showing the conical engage mechanism mounting of the pedal lever of a pedal driven propulsive set of a boat according to the present invention;

Figure 18 is a cutting view showing the conical engage mechanism of the pedal lever of a pedal driven propulsive set of a boat according to the present invention in an unlocked position;

Figure 19 is a cutting view showing the conical engage mechanism of the pedal lever of a pedal driven propulsive set of a boat according to the present invention in a locked position;

Figure 20 is a perspective view showing main parts of a pedal driven telescopic propulsive set of a boat according to the present invention;

Figure 21 illustrates pictures showing the primary torque tube engage mechanism in the secondary torque tube of a pedal driven telescopic propulsive set according to the present invention; Figure 22 is an exploded perspective view showing the mounting sequence of the primary torque tube of a pedal driven telescopic propulsive set of a boat according to a present invention;

Figure 23 is a perspective view of a primary torque tube mounted in a pedal driven telescopic propulsive set of a boat according to the present invention;

Figure 24 illustrates sequenced pictures showing the secondary external tube mounting in a pedal driven telescopic propulsive set of a boat according to the present invention;

Figure 25 illustrates the plastic bushing of a pedal driven propulsive set of a boat according to the present invention;

Figure 26 illustrates sequenced pictures showing a bushing mounting of a pedal driven telescopic propulsive set of a boat according to the present invention;

Figure 27 illustrates sequenced pictures showing tail mounting of a pedal driven telescopic propulsive set of a boat according to the present invention;

Figure 28 illustrates a perspective view of a pedal driven telescopic propulsive set of a boat according to the present invention;

Figure 29 illustrates sequenced pictures showing locking means mounting of a pedal driven telescopic propulsive set of a boat according to the present invention;

Figure 30 is a cutting view showing details of a locking means of a pedal driven telescopic propulsive set of a boat according to the present invention in a locked position;

Figure 31 illustrates a cutting view illustrating details of a locking means of a pedal driven telescopic propulsive set of a boat according to the present invention in an unlocked position;

Figure 32 illustrates sequenced pictures showing mounting sequence of a primary torque tube of an articulated pedal driven propulsive set of a boat according to the present invention; Figure 33 illustrates sequenced figures showing a mounting sequence of an engage pin of an articulated pedal driven propulsive set of a boat according to the present invention;

Figure 34 is an exploded perspective view showing main parts of a secondary external tube of an articulated propulsive of a boat according to the present invention;

Figure 35 illustrates pictures showing the mounting sequence of engage cup of an articulated pedal driven propulsive set of a boat according to the present invention;

Figure 36 illustrates a perspective view showing the tail mounted in the secondary external tube of an articulated pedal driven propulsive set of a boat according to the present invention;

Figure 37 illustrates sequenced pictures showing the mounting sequence of a secondary external tube in the primary external tube of a pedal driven articulated propulsive set of a boat according to the present invention;

Figure 38 illustrates pictures showing the mounting sequence of a locking mechanism of a pedal driven articulated propulsive set of a boat according to the present invention;

Figure 39 illustrates sequenced pictures showing shut mechanism function of a pedal driven articulated propulsive set of a boat according to the present invention;

Figure 40 illustrates an exploded perspective view showing the pedal driven propulsive set being mounted in the square shaft of a boat according to the present invention;

Figure 41 is an exploded perspective view showing a fork of a pedal driven propulsive set of a boat being mounted according to the present invention;

Figure 42 is a perspective view showing a pedal driven propulsive set being mounted in a boat structure according to the present invention; Figure 43 illustrates pictures showing the direction mechanism operation of a pedal driven propulsive set of a boat according to the present invention;

Figure 44 illustrates sequenced pictures showing the propeller mounting sequence of a pedal driven propulsive set according to the present invention;

Figure 45 is a perspective view of a boat according to the present invention in which such boat is a pedal propelled boat according to the invention;

Figure 46 illustrates sequenced pictures showing a folding sequence of the inflatable hull of a boat according to the present invention;

Figure 47 is a side view of a boat structure according to the present invention wherein a pedal driven telescopic propulsive set is shown in the first stage of a compacting sequence;

Figure 48 is a side view of a structure of a boat according to the present invention wherein a pedal driven telescopic propulsive set is shown in the second stage of a compacting sequence;

Figure 49 is a side view of a boat structure according to the present invention wherein a pedal driven telescopic propulsive set is shown in the third stage of a compacting sequence;

Figure 50 is a side view of a structure of a boat according to the present invention wherein a pedal driven telescopic propulsive set is shown in a compacted condition;

Figure 51 is a side view of a boat structure according to the present invention which employs a pedal driven articulated propulsive set in a first step of a compacting sequence;

Figure 52 is a side view of a boat structure according to the present invention which employs a pedal driven articulated propulsive set in a second step of a compacting sequence;

Figure 53 is a side view of a boat structure according to the present invention wherein a pedal driven articulated propulsive set is shown in the third step of the compacting sequence; Figure 54 is a side view of a boat structure according to the present invention wherein a pedal driven articulated propulsive set is shown in a compacted condition;

Figure 55 is a perspective view showing backpack shoulder strap and belts provided in the boat structure according to the present invention wherein a pedal driven telescopic propulsive set is employed;

Figure 56 is an exploded perspective view showing a compacting sequence of boat parts according to the present invention wherein a pedal driven telescopic propulsive set is employed;

Figure 57 is a perspective view of a boat in a compacted backpack condition according to the present invention wherein a pedal driven propulsive set is employed;

Figure 58 is a side view of a regular size person carrying the boat according to the present invention wherein a pedal driven telescopic propulsive set is employed;

Figure 59 is a side view of a regular size person driving the boat according to the present invention wherein a pedal driven telescopic propulsive set is employed in an operation condition;

Figure 60 is an exploded perspective view showing accessories engaging in the boat structure according to the present invention wherein a pedal driven propulsive set is employed;

Figure 61 is an exploded perspective view showing a cover to be employed in a boat according to the present invention;

Figure 62 illustrates pictures showing the cover fixing in a boat according to the present invention;

Figure 63 is a perspective view of an electric propulsive set of a boat according to the present invention;

Figure 64 is an exploded perspective view showing electric tail mounting at the support of an electric propulsive set of a boat according to the present invention;

Figure 65 comprises pictures showing battery and electric components set fixing in the main structure of a boat according to the present invention; Figure 66 comprises pictures showing the function and mounting of an electric propulsive set of a boat according to the present invention ;-

Figure 67 is a side view of a boat structure according to the present invention which employs an electric propulsive set, in the first step of a compacting sequence;

Figure 68 is a side view of a boat structure according to the present invention which employs an electric propulsive set, in the second step of a compacting sequence;

Figure 69 is a side view of a boat structure according to the present invention which employs an electric propulsive set, in the third step of a compacting sequence;

Figure 70 is a side view of a boat structure according to the present invention which employs an electric propulsive set in a compacted condition;

Figure 71 is a perspective view showing backpack shoulder strap and belts provided in a boat structure according to the present invention in a compacted condition;

Figure 72 is an exploded perspective view showing a compacting sequence of boat parts according to the present invention which employs an electric propulsive set;

Figure 73 is a perspective view of a boat according to the present invention which employs an electric propulsive set in a backpack compacted condition;

Figure 74 is side view of a regular size person carrying a boat according to the present invention which employs an electric propulsive set in a compacted backpack condition;

Figure 75 is a side view of a regular size person driving a boat according to the present invention which employs an electric propulsive set in an operation condition;

Figure 76 is an exploded perspective view showing accessories engaging in the support of the electric propulsive set of a boat according to the present invention; and Figure 77 is a perspective view of a boat according to the present invention which employs an electric propulsive set and having a cover which panel is a flexible solar panel according to the present invention.

According to Figure 1 , the present invention shows a main structure (1) which comprises a bench seat. Such structure (1) receives other parts of the present invention. Seatback structure (2) is mounted in the main structure (1) for bench mounting. Connection bars (3, 4 and 5) connect the main structure (1) to the inflatable hulls (6). Handles are mounted at side of the main structure (1) so that the left handle (7) is rigidly fixed and the right handle (8), which serves as support and also for driving, is mounted in an articulated fashion. In the frontal part of the main structure (1) a square shaft (9) is mounted in a telescopic fashion and in its end a pedal propulsive set is mounted, when the boat is configured to be pedal driven or a foot rest (10), when the boat is configured to be electric engine driven. In view of all structural parts are mounted in a single body (main structure (1)), the entire boat is rigidly set in a simple fashion. Structural stiffness is important, because it causes driving comfort and enhances pedaling efficiency (low energy levels are absorbed due to the structure elasticity) and driving quality. Figure 1 shows parts which are commons to both configuration embodiments of the present invention.

Figure 2 shows the present invention configured to be pedal driven, the propulsive set can be seen and it basically comprises a pair of pedals (11), a transmission system and the propeller (12). The pedal driven propulsive set is mounted at the frontal edge of the square shaft (9), having a fork (13), which is mounted in the main structure (1) and serves as support to the pedal driven propulsive set. An adjustable shaft (14) mechanically connects the right handle (8) to the tail (15) in order to permit the driving ability of the vehicle.

Figure 3 shows the present invention configured to be electric engine driven, the electric propulsive set is seen and it basically comprises an electrical tail (16) a battery and electronic components set (17) and the speed control (18) coupled to the right handle (8) is provided with electric engine (19) speed control. The electric tail (16) is mounted in the support (20) which, by its turn, is fixed to the rear part of the main structure (1). The electric tail (16) is mechanically connected to the right handle (8) by means of a shaft (21) in order to permit the vehicle driving ability.

A mounting parts explanation which is common to both embodiments, according to Figure 1, will be described as follows.

Figure 4 shows the main structure (1). The seatback structure (2) is mounted in the main structure (1) according to the figure 5. Therefore, bushing (22) are initially inserted which serve to absorb the compression exerted by screw (23) and nut (24) fixing in order to permit the seatback structure (2) rotate freely. To avoid seatback structure (2) rotation backwardly in an operation condition, restoring arms (25) is used as in Figure 6. Firstly restoring arms (25) is positioned and then the washer (26) followed by the screw (27). For seatback structure (2) fixing in an operation position, a groove (28) provided in the restoring arm (25) must be engaged in the support (29) of the main structure (1). As the driver back push the seatback structure (2) backwards, a traction effort T of the restoring arm (25) keeps the groove (28) in the locked condition avoiding the restoring arm (25) being detached from its operation condition.

As in the Figure 7, the left handle (7) is part of the main structure (1), being rigidly fixed and serving only as support. The right handle (8) is mounted in order to freely rotate around the axis (30), which is part of the right handle (8) and is positioned in an angle of about 110° relative to it. For assemblage, firstly the plastic bushing (31) must be inserted in the support (32) located in the main structure (1). Then the right handle (8) can be inserted inside the plastic bushing (31). To avoid translation of the right handle (8) inside the plastic bushing (31), washer (33) is added and then the retention ring (34). The right handle (8) can freely spin around the axis (30). The axis (30) end has a coiled pin forming a male terminal (35) of a quick engage mechanism.

As in the Figure 8, the square shaft (9) is inserted in the frontal part of the main structure (1). A cam type lever (36) is mounted at the edges (37) of the main structure (1). The square shaft (9) has an L section bar (38) provided at one of the its edges which has concaves regions (39) serving to engage the cam (40) of the lever (36), distributing pressure applied by the cam (40) and avoiding the square shaft (9) be axially displaced in relation to the main structure (1). The lever (36) is mounted in one of square cross-section vertices. Therefore the F force applied by the cam (40) compress the two opposite sides of the square section with the same intensity, eliminating any square shaft (9) loosening in relation to the main structure (1), providing tied joined pieces. A safe lock (41) is used to avoid the lever (36) be unlocked.

Connection bars (3, 4 and 5) are directly mounted in the main structure (1), as in Figure 9. Thus, firstly plastic bushings (42) are inserted in the supports (43) in the main structure (1). Over each support (43) a quick engage buckle (44) is mounted. For connection bars mounting, such bars are inserted in the orifice (45). The ring (46) of the buckle (44) is engaged in the hook (47) provided in the connection bar and the buckle (44) can then be driven, fixing the connection bar to the main structure (1).

After all connection bars are provided, one can fix inflatable hulls (6).

Inflatable hulls (6) are fixed in the connection bars, as in Figure 10. The procedure comprises to connect the buckle (48) in the hooks (49) located in the connection bars, as in Figure 10. This operation must be accomplished with the inflatable hulls (6) in a partially inflated condition. After this operation is accomplished, inflatable hulls (6) must be totally inflated by means of their respective valves (50), causing permanent belt (51) traction due to the hull expansion. For inflatable hulls (6) removal one must proceed in a reverse fashion, firstly deflating the hulls (6) by means of the valves (50) up to the moment which the belts (51) are loosen in order to permit buckle (48) and hook (49) removal. The belts (51) are made of nautical fabric, the same fabric of the inflatable hulls. Belts (51) are glued or welded on the external part of the inflatable hulls (6).

The main structure (1) and the seatback structure (2) are fabric covered. Bench base fabric (52) has a rectangular shape. Two of its ends reciprocally in opposition in relation to each other are folded and after welded, glued or sewed. Bench base fabric (52) is supported by two reinforcement bars (53) which are inserted in each one of orifices (54) as in Figure 11. The Bench base fabric (52) is then positioned in the main structure (1) and fixed by means of screws. The seatback fabric (55) is fixed in the seatback frame (2) by employing the same fixing procedure. The seatback fabric (55) has an opening (56) as in Figure 11.

The following is an explanation of the function and mounting of component parts of the pedal propulsive set.

A pedal propulsive set configuration can be seen in Figure 12. Figure 2 shows a pedal propulsive set provided in the boat structure.

As in Figure 13, the pedal propulsive set shows a primary external tube (57) which presents at its end a gearbox (58). Inside the gearbox (58) a set of conical gears 90° positioned are mounted to transmit motion from pedals (11) to the propeller (12). To provide the above mentioned transmission, initially the crank set (59) is inserted in a plastic bushing (60) containing two embedded rolls as in Figure 14. This plastic bushing (60) is positioned inside the gearbox (58) in a position close to the end of the primary external tube (57), as in Figure 15. By the other end of the primary external tube (57) a primary torque tube (61) is inserted until reach the crank set (59) being further added screws which makes the crank set (59) to synergistically act in relation to the primary torque tube (61). After this operation, the crown set (62) can then be mounted in the gearbox (58) as in Figure 16. In this sense, the crown set (62) is positioned and after two plastic walls (63), each one containing one roll and one retained, are added. Five screws and nuts are then provided for finishing the gearbox mounting.

Pedal (11) levers (64) are mounted in each one of the crown set (62) ends. At least one lever (64) must be able to do 180° rotation in relation to the other to provide a close compacting. As a result both levers (64) are positioned as mirror images. In this sense a system employing a quick locking means (65) is provided and it permits the lever (64) be quickly 180° rotated without using tools. The working approach is outlined as follows:

The end of crown set (62) acts as a male part (66) of a conical engage having octahedral cross-sections. The pedal lever base forms the female part (67) of the conical engage. Thus, a slight axial displacement of the lever (64) in relation to the crown set (62) permits that the lever (64) rotates freely around the geometric axis of the crown set (62) while it is kept static. For the system mounting firstly a retained ring (68) is added as in Figure 17. After this, the smooth washer (69) is inserted and the rough washer (70) is then added. Further a lever (64) can be inserted and after the quick locking means (65). The quick locking means (65) has a cam (71) which presses the lever (64) at its concave region (72), providing deflection of the rough washer (70) and the female part (67) of the conical engage being firmly engaged in the male part (66). Thus, the lever (64) and the crown set (62) work synergistically. The 180° rotation procedure of the lever (64) around the geometric axis of the crown set (62) is outlined as follows: Firstly, one must pull the quick locking means (65) which is initially in the position as in Figure 19. As the quick locking means (65) is pulled, its cam (71) gradually releases the axial movement of the lever (64) in relation to the crown set (62). The rough washer (70) gradually pushes the lever (64) up to the point where the lever (64) can be rotated around the geometric axis of the crown set (62) while it is kept static. In this point the quick locking means (65) is in a completely released as in Figure 18.

The pedal propulsive set can be provided as two types: telescopic and articulated.

The following is to show the telescopic propulsive set.

The telescopic propulsive set has primary torque tube (61) and a secondary torque tube (73). The first one has a bigger diameter and receives the second one in its inside in a compacted condition. Therefore, the telescopic propulsive set has a primary external tube (57) and a secondary external tube (74). The first one has a bigger diameter and receives the second one in its inside in a compacted condition. The above are shown in Figure 20.

The primary torque tube (61) has an engage element

(75) inside its ends, as in Figure 21. The secondary torque tube (73) has one engage element (76) in the external part of its ends. For system mounting, firstly, the secondary torque tube (73) is inserted inside the primary torque tube (61) as in Figure 21. After this, the smooth end of the primary torque tube (61) is inserted inside the primary external tube (57) according to Figure 22 and it is mounted as above. When this mounting is completed, the secondary torque tube (73) is positioned inside the primary torque tube (61) having free axial motion and free rotation. When the secondary torque tube (73) is totally extended, the engagement element (76) which is present at the external part of its end is engaged in the engage element (75) presented inside the primary torque tube (61) end as in Figure 21. In this condition, tubes are ready to torque transmission.

One end of the external secondary tube (74) has a stopper (77) in its external part as in Figure 20. In this end is inserted a plastic bushing (78) and this external secondary tube (74) end is then inserted inside the external primary tube (57) such as the primary torque tube (61) be embedded inside the plastic bushing (78), as in Figure 24. At this point, the main plastic bushing (79) is inserted as in Figure 25 up the completely embedding in the external primary tube (57), where it is fixed by means of a screw (80). The main plastic bushing (79) has in its external part a sealing ring and in its end a wiper type L (81) to keep sealed the inner part of the tubes.

At the end of the external secondary tube (74) a tail set (15) is mounted. Firstly in this sense, the plastic bushing (82) is inserted at the external secondary tube (74) as in Figure 26. The plastic bushing (82) has one roll and one retainer in its inside. At external part of the plastic bushing (82), a sealing ring is positioned. The plastic bushing (83) is inserted at the tail (15) as suggested in Figure 27 and a screw (84) being further added for keep its position. The axis (85) is then inserted in the plastic bushing (83) and the half- cardan (86) is then fixed in the axis (85). Further, the half-cardan (87) is fixed at the secondary torque tube (73) end, as suggested in Figure 27. Finally the two half-cardans (86 and 87) are mounted. After cardan mounting, the holes (88 and 89) of the tail (15) must be aligned in relation to the holes (90 and 91) in the external secondary tube (74) and then the screw (92) must be set in the lower part of the tail (15) and the lever (93) is mounted in the tail (15). The pin (94) in the lever (93) body is passed through the holes (88) and (90) and the screw (92) by means of holes (89 and 91). Therefore, the tail is fixed at the end of the external secondary tube (74) being able to rotate around an imaginary axis which gathers the holes (88, 90, 91 and 89) which also passes through the center of the cardan articulation. The tail (15) has stoppers 45° positioned in each side. At this point, the telescopic propulsive set is mounted, as in Figure 28. The external secondary tube (74) can be axially translated and rotated in relation to the primary external tube (57). To avoid external secondary tube (74) translation and rotation in relation to the external primary tube (57) in the operation condition, a locking means is provided as in Figure 29. The locking means body (95) is welded in the external primary tube (57) wall. The external primary tube (57) is previously drilled and the central drill hole serves as guide for the locking pin (96) and the sides act as air passageway. The locking means body (95) has openings (97) that act as air passageway. The mounting sequence comprises to insert the locking pin (96) having a sealing element (98) which serves to seal the venting holes (99) when the locking means is in a locked position. Further a coil (100) is added being followed by a cap (101) which is then fixed by means of the retainer ring (102). After this, the driving ring (103) is added. Figure 30 is a cutting view showing the locking means in a locked condition. The unlocking procedure consists of pull the locking pin (96) by means of the driving ring (103) and, when the stopper is reached, a 90° rotation to any direction. Therefore, the locking pin (96) is kept unlocked and the venting holes (99) are kept clear, permitting the external secondary tube (74) is withdrawn as in Figure 31.

The articulated propulsive set is shown as follows.

Articulated propulsive set has a primary torque tube

(104) which is mounted inside the external primary tube (105). In this sense an axis (106) is firstly inserted in one of primary torque tube (104) ends as in Figure 32 and then screws are further added in order to act synergistically. Further, the other primary torque tube (104) end is inserted inside the external primary tube (105) as in Figure 32 and it is mounted as described above. Plastic bushing (107), which contains a sealing ring in its external part, is inserted in the external primary tube (105) as in Figure 33, and then a screw (108) is added to keep bushing position. After this, a roll (109) is inserted and then a stopper ring (110). The retainer (111) is added to keep the external primary tube (105) inner part sealed. At this point the engage pin (112) can be inserted in the axis (106) end. The secondary torque tube (113) is mounted inside the external secondary tube (114). For this, the axis (115). is inserted in its end, as in Figure 34, further; screws are added to provide synergistic action. As in Figure 35, in one of the external secondary tube (114) ends, a plastic bushing

(116) containing a sealing ring in its external part is inserted and then a screw

(117) to keep bushing position. Further, a roll (118) is inserted. The secondary torque tube (113) is then inserted inside the external secondary tube (114) by the rear part until the axis (115) be positioned inside the roll (118). Further, the stopper ring (119) is added. The retainer (120) is added to keep the inside of the tube sealed. The engage cup (121) is inserted in the axis (115) as in Figure 35 being then added a screw which keeps the cup in its position and providing synergistic action in relation to the secondary torque tube (113).

In the rear end of the external secondary tube (114) a tail set is mounted, as above described in the present invention and the mounted set is shown in Figure 36.

The external primary tube (105) is positioned in relation to the external secondary tube (114) as in Figure 37, being further added a screw (122) and nut (123) gathering both parts for freely articulate around the screw (122) geometric axis.

Finally, the articulated propulsive set receives a mechanism for a quick shut, which is mounted in the external primary tube (105) and external secondary tube (114) as suggested in Figure 38 and it can be quickly folded or extended for transport and storage ends respectively. Figure 39 shows a shut sequence of the articulated propulsive set. In the operation position, the engage pin (112) is engaged in the engage cup (121) permitting torque transmission between the primary torque tube (104) and the secondary torque tube (113).

Articulated propulsive set and the telescopic propulsive set are fixed in the boat structure by the same way. The following is to show the way how propulsive systems are fixed in the boat structure, employing, for example, a telescopic propulsive set.

In the square shaft (9) end a support (130) is provided and in this support a telescopic propulsive set is fixed by means of flaps (131) of the gearbox (58). Therefore, the telescopic propulsive set is positioned as suggested in figure 40 and bushings (132) being further inserted to support the pressure from screws (133) in order to permit the telescopic propulsive set freely spin around the screws (133) geometric axis.

The fork (13) is positioned in the main structure (1) as suggested in Figure 41. Further, bushings (134) are added to support compression effort of the screws (135), permitting the fork (13) freely spin around the geometric axis of the tube (136). In the fork (13) lower end there is a U-shaped device containing a lock (137). This lock (137) is connected in the hole located in the flap (138) to the operation condition, as suggested in Figure 42.

The tail (15) rotation is started by the right handle (8) which is mechanically connected to the tail by means of the adjustable shaft (14) as in Figure 43. Adjustable shaft (14) is made of a rear tube (139) and frontal tube (140) which are mounted telescopically. One of the ends of the frontal tube (140) has a slot where a bracket (141) having a flapping screw (142) is mounted. In this end the rear tube (139) is telescopically inserted. In the other end of the frontal tube (140) a lever (143) is mounted. For the adjustable shaft (14) mounting the following is carried out: First the female engage (144) of the lever (143) is fixed in the male terminal (35) which synergistically acts in relation the right handle (8). Further, the thrusted end of the rear tube (139) (the rear tube (139) can rotate and translate inside the frontal tube (140)) is thrusted in the screw present in the lever (93), which synergistically acts in relation to the tail (15). Finally the flapped screw (142) located in the bracket (141) must be thrusted to keep the frontal tube (140) and the rear tube (139) gathered. At this point, when the right handle (8) is spun, the tail (15) is simultaneously spun, providing the vehicle driving ability.

The propeller (12) is mounted in the axis (85) as in Figure 44. The engage (145) present in the propeller cube (12) fits the engage

(146) present in the axis (85) to provide synergistic rotation. Further, the spinner

(147) is thrusted which keeps the propeller (12) in its position and enhances boat performance due to its hydrodynamics. The following is to show a compacting sequence for a boat which employs a telescopic propulsive set.

From the operation condition of the boat, as in Figure

45, firstly one can deflate the inflatable hulls (6) by means of valves (148) and remove them. For inflatable hulls (6) compacting quickly, one can employ a two folding sequence, as in Figure 46 (dash lines indicate the folding position). Connection bars (3, 4 and 5) can then be removed.

After the connection bars (3, 4 and 5) and adjustable shaft (14) removal, the boat structure reaches a configuration as in Figure 47.

The secondary external tube (74) can be retracted and the boat structure configuration is now shown in Figure 48.

The restore arms (25) can be disconnected from the supports (29) releasing the seatback structure (2) for rotation. The fork (13) can be disconnected from the plate (138) being further connected to the support (149) in the seatback structure (2), and boat structure configuration being shown in Figure 49.

One of the levers (64) can be rotated 180° and the telescopic propulsive set can be retracted, finishing this compacting sequence. The boat structure configuration has now compacted condition as shown in Figure 50.

The following is to show the compacting sequence for a boat having an articulated propulsive set.

From the boat in operation condition, firstly one can deflate the inflatable hulls (6) by means of valves (148), remove and compact them as shown in Figure 46.

After the connection bars (3, 4 and 5) and adjustable shaft (14) removal, the boat structure reaches a configuration as in Figure 51.

The restore arms (25) can be disconnected from the support (29) releasing the seatback structure (2) for rotation. The fork (13) can be disconnected from the plate (150) being further connected in the support (149) in the seatback structure (2) and the structure configuration is as shown in Figure 52. After the external secondary tube (114) can be retracted and the boat structure configuration is as shown in Figure 53.

One of the levers (64) can be 180° rotated and the articulated propulsive set can be retracted finishing this compacting sequence. The boat structure has the compacted condition configuration as shown in Figure 54.

As shown, both systems (telescopic and articulated) were able to be compacted. Inflatable hulls (6), connection bars (3, 4 and 5) and the adjustable shaft (14) were disconnected from the set. To join all elements in a single volume, the backpack shoulder strap (151) which is provided in the seatback structure (2) is used and two belts (152) are provided, one in the seatback structure (2) and other in the main structure (1), as in Figure 55. Belts (152) have length adjusting means and buckle (153) which permits a quick engage. Backpack shoulder strap (151) are passed through the opening (56) present in seatback fabric (55) and their buckles (154) are engaged in the supports (29), similarly to the restoring arms (25). In the backpack shoulder strap (151) base four holes (155), through which four connection bars (3, 4 and 5) are placed, are provided as in Figure 55. Further, the first hull (6) is positioned folded as in Figure 46, followed by the adjustable shaft (14) and by the second hull (6), as in figure 56. Finally, the two belts (152) are tied as in Figure 57, keeping all parts compacted in a single volume. The boat is now in a compacted condition, being easily carried and making the transport easy.

Figure 58 shows a regular size person carrying the boat in a compacted condition.

Figure 59 shows a regular size person driving the boat in an operation condition.

As in Figure 60, the main structure (1) has a female support (156) for accessories engaging, such as baskets, water bottle support, flags, advertisement panels, etc. which must have a male engage (157).

The following is to show a cover which has been specifically provided for boat employment; such cover can be compacted at a small volume packing for an easy transport and storage. As in Figure 61 , the cover basically comprises four structural parts and a membrane. For cover assemblage, one must firstly engage the male (157) present in the base structure (158) at the female support (156) present in the rear part of the main structure (1). After this, the male engage (159) of the longitudinal structure (160) can be engaged in the female engage (161) of the base structure (158). The rear transversal structure (162) is then inserted and then the frontal transversal structure (163), which have a sliding engage (164) which is able to perform axial translation in relation to the longitudinal structure (160). The membrane (165) incorporates a rope (166) in its ends which is exposed in six regions, as in Figure 62. Five exposed parts of the rope (166) are inserted in slots (167) present in the longitudinal structure frontal part (160) and in the ends of the transversal structures (162 and 163). A hook (168) which is provided in the exposed part of the rope (166) positioned in the rear region of the membrane (165) is then engaged in the engagement (169) present in the base structure (158), and it causes membrane (165) traction completing its assemblage. At frontal transversal structure (163) ends, two ropes (170) are fixed, which has hooks (171). For cover mounting finishing, such hooks (171) are engaged in supports (172) present in inflatable hulls (6) in such manner that hopes (170) are kept tractioned. Hope (170) traction provides a slight flexure of the base structure (158) and the longitudinal structure (160) enhancing the structural stiffness of the cover as a tent. As a non limitative example, water bottle support (173) are fixed in the base structure (158). The membrane (165) of the cover is parallel positioned in relation to the water surface being always aligned in relation to the wind direction. Therefore, the cover is able to resist to wind force and such force provide a slight push effect, permitting the navigation against the wind without relevant efforts. The simple structure of the cover permits a 360° clear view for the user.

The following is to provide an explanation about the electrical propulsive system.

The electric propulsive set can be seen in Figure 63. Figure 3 shows the electric propulsive set incorporated to the boat structure.

The electric propulsive set comprises a support (20), in which the frontal part is provided with a male terminal (157) serving to fix to the female terminal (156) present in the main structure (1). As in Figure 64, in the rear part of the above mentioned support a bearing (174) is assembled. The bearing (174) is positioned and then the flap screw (175) is added for pieces gathering. The electrical tail (16) can then be inserted in the bearing (174) until the stopper (176) in the electrical tail tube (16) reaches the bearing (174). At this point a lever (177) is inserted in the upper part of the tube and then a screw (178) fixes the lever in its position. The lever (177) serves to stop electrical tail (16) axial translation in relation to the bearing (174) and at the same time it is part of the driving mechanism. The electric tail (16) has free rotation in relation to its tube.

A set of batteries and electronic components (17) is fixed in the main structure (1). To accomplish this procedure, the set is positioned in the lower part of the main structure (1) and being fixed by means of four engage mechanisms (179), as suggested in Figure 65.

The speed control (18) of the electric engine (19) is inserted in the right handle (8), as in Figure 66. This control has two buttons which can be pushed by using the right hand thumb. The right button (180) is a forward speed selector and the left button (181) is a backward speed selector. The acceleration control is carried out by means of a trigger (182) which is started by using the index finger. If the trigger (182) is not started, the electric engine (19) does not start, and it is provided to avoid non intentional starting. Therefore, if a forward motion is intended, the right button (180) must be pushed by using the driver's right hand thumb and the trigger must be moved by means of the index finger to set the intended speed. If backward movement is intended, the left button (181) must be selected by means of the driver's right hand thumb and the trigger must be moved by means of the index finger to set the intended speed. The speed control (18) is connected to the battery and electronic components set (17) by means of a cable (183). The tail electric cabling (184) is also connected to the battery and electronic components set (17).

As in Figure 66, in the right handle (8) body there is a male terminal (35) where the lever (185) presented in steering shaft (21) is coupled. The other end of the steering shaft (21) is coupled in the lever (177) mounted in the upper part of the electric tail (16). Therefore, when the right handle (8) is spun, the electric tail (16) is simultaneously spun for direct the propeller (186) pushing force to the left or to the right, providing a good boat driving ability. All controls are ergonomically present in the right handle (8), which is used in a joystick fashion, making the operation easy.

As suggested in Figure 66, in the frontal part of the square shaft (9) is fixed, by means of screws, the driver's foot support (10).

The following is to show a compacting sequence for a boat having an electric propulsive set.

From a boat in the operation condition, as in Figure

3, firstly the inflatable hulls (6) are deflated by means of valves (148) and then removed and compacted as in Figure 46.

After the connection bars (3,4 and 5) and the steering shaft (21) are removed, the boat structure is as in Figure 67.

The electric tail (16) can be withdrawn, and the boat structure after this is seen in Figure 68.

Foot support (10) can be withdrawn and after this the boat structure is as in Figure 69.

Restore arms (25) can be disconnected from supports (29) permitting the backseat structure (2) be free for rotation. The support (149) present in the backseat structure (2) is connected in engage mechanism (187) present in the support (20), after this the boat structure is as in Figure 70.

As in Figure 70, the boat has become very compact.

The hulls (6), the connection bars (3,4 and 5) and the steering shaft (21) were disconnected from the main set. . To join all elements in a single volume, the backpack shoulder strap (151) which is provided in the seatback structure (2) is used and two belts (152) are provided, one in the seatback structure (2) and other in the main structure (1), as in Figure 71. Belts (152) have length adjusting means and buckle (153) which permits a quick engage. Backpack shoulder strap (151) are passed through the opening (56) present in seatback fabric (55) and their buckles (154) are engaged in the supports (29), similarly to the restoring arms (25). In the backpack shoulder strap (151) base four holes (155), through which four connection bars (3, 4 and 5) are placed, are provided as in Figure 71. Further, the first hull (6) is positioned folded as in Figure 46, followed by the steering shaft (21) and by the second hull (6), as in figure 72. Finally, the two belts (152) are tied as in Figure 73, keeping all parts compacted in a single volume. The boat is now in a compacted condition, being easily carried and making the transport easy.

Figure 74 shows a regular size person carrying the boat in a compacted condition.

Figure 75 shows a regular size person driving the boat in an operation condition.

As in Figure 76, in the support (20) a female support

(188) is provided for accessories engaging, such as baskets, water bottle support, flags, advertisement panels, etc., which must comprise a male engage (157).

The cover specifically provided for the boat can be also employed in the electric engine propelled boat. By replacing the membrane (165) by a flexible solar panel (189), it can protect the driver against solar radiations and at the same time transform such radiation in electric energy which can propel the electric engine and/or load the battery, transforming the boat into a portable solar energy propelled boat.

Figure 77 shows a function scheme of the portable boat which is solar energy propelled. The Sun light reaches the flexible solar panel (189) and it is transformed into electric current being conducted by means of cables (190) to the battery and electronic component set (17) where it is employed to propel the electric engine (19) and/or load the battery.

All the above depicted provide simple and practical solutions to all technical problems related to the inventive step. Some variations of mechanisms presently described having the same functions as in the present invention are included in the present claimed invention scope.

Claims

- 1 -CLAIMS

1. Portable boat, comprising a main structure (1) including a seat in which is mounted:

A seatback structure (2) in an articulated fashion and being positioned in an angle of about 110° in relation to the seat for an operation condition and 180° in a compacted condition;

A pair of handles (7)(8) for hand support and being mounted in the side parts of the main structure (1), wherein the left handle (7) is rigidly fixed and the right handle (8), which serves for hand support and also for driving, is articulated mounted;

A square shaft (9), telescopically mounted in the frontal part of the main structure (1) to permit length adjustment according to the driver size; and

Four connection bars (3), (4) and (5) to connect the main structure (1) to the inflatable hulls (6).

2. Portable boat, according to claim 1 , comprising a lever (36) which is mounted in the flaps (37) provided and having a cam (40) which is able to be engaged in any one of the concave regions (39) of the L section bar (38) of the square shaft (9) such as the F force applied by the cam (40) compress the opposite sides of the square section with the same strength to eliminate any loosen regions of the square shaft (9) in relation to the main structure (1) making such pieces firmly tied and avoiding that square shaft (9) be axially displaced in relation to the main structure (1) in which a locking means (41) is provided to avoid involuntary lever (36) unlock.

3. Portable boat, according to any one of the preceding claims comprising a pedal driven telescopic propulsive set having a primary torque tube (61) and a secondary torque tube (73) wherein the former has a bigger diameter and housed the latter in its inside when a compact condition is reached and, similarly, the telescopic propulsive set has an external primary tube (57) and an external secondary tube (74) wherein the former has a bigger diameter and houses the latter in its inside in a compacted condition, permitting the set being retracted or extended to the operation condition in which a locking means (96) retains any external secondary tube (74) movement - 2 -

in relation to the external primary tube (57); the pedal driven telescopic propulsive set is mounted in the frontal end of the square shaft (9), having a fork (13) mounted in the main structure (1) and serving as support for the set which comprise a pair of pedals (11), a transmission system and a propeller (12), which axis (85) works inside the tail (15) which is mechanically connected to the right handle (8) by means of an adjustable shaft (14) to provide the boat driving ability.

4. Portable boat, according to any one of the claims 1 or 2, comprising a pedal driven articulated propulsive set which comprises a primary external tube (105) inside which a primary torque tube (104) is mounted and having a engage pin (112) in its end in order to be engaged in the engage cup (121) provided in the end of the secondary torque tube (113) which is mounted inside the secondary external tube (114) which is articulated mounted in external primary tube (105) and receiving an expanding/retraction mechanism to set the engage pin (112) engaged in the engage cup (121) in an operation permitting torque transmission between the primary torque tube (104) and the secondary torque tube (113); the pedal driven articulated propulsive set is mounted in the frontal end of the square shaft (9), having a fork (13) mounted in the main structure (1) and serving as support for the set which comprise a pair of pedals (11), a transmission system and a propeller (12), which axis (85) works inside the tail (15) which is mechanically connected to the right handle (8) by means of an adjustable shaft (14) to provide the boat driving ability.

5. Portable boat, according to any one of the preceding claims, comprising an engage mechanism in which the axis end forms the male part (66) having a conical engage and octahedral cross-section being mounted in the pedal lever base to form the female part (67) of this conical engage which is driven by means of a quick locking means (65) thrusted to the axis by means of a screw having a cam (71) to permit an axial displacement of the lever (64) in relation to the axis just for fit two scenarios: the female part (67) is synergistically cooperated in relation to the male part (66) and the female part (67) is free to rotate in relation to the male part (66). - 3 -

6. Portable boat, according to any one of the preceding claims comprising an axis (85) where a propeller (12) is mounted in a such manner that the engage (145) of the propeller (12) cube is engaged in the engage (146) of the axis (85), providing a synergistic actuation in relation to the rotation and a spinner (147) is further connected to keep the propeller in its position and to improve the performance of the boat due to its hydrodynamic shape.

7. Portable boat, according to any one of claims 1 or 2, wherein an electric engine driven propulsive set, comprising basically an electrical tail (16) mounted in the support (20) which is fixed to the rear part of the main structure (1) in which a battery and electronic components (17) are provided and being connected to a speed control (18) coupled to the right handle (8) having electric engine (19) speed control by means of two thumb driven buttons wherein the right button is a forward speed selective button and the left button (181) is a backward speed selective button and the acceleration control is performed by an index finger driven trigger (182) and the electric tail (16) is mechanically connected to the right handle (8) by means of a shaft (21) to permit boat driving ability.

8. Portable boat, according to any preceding claims, comprising a backpack shoulder strap (151) in the seatback structure (2) and two belts (152), one in the seatback structure (2) and other in the main structure (1) having adjustable length and buckle (153) to permit a quick engage; the backpack shoulder strap (151) passes through the opening (56) present in the seatback fabric (55) and its buckles (154) engage in the supports (29), similarly to the restore arms (25) engage; the backpack shoulder strap (151) base is provided with four holes (155) to receive the four connection bars (3), (4) and (5); the two hulls (6) and the shaft are positioned and involved by the two belts (152) witch are tied, keeping all parts in a single volume that can be transported in a person's back as a backpack.

9. Portable boat, according to any one of the preceding claims, wherein a cover basically comprising four structural parts and one membrane; the cover is fixed by means of the male engage (157) of the base structure (158) being engaged in the female part (156) of the rear part of - 4 -

the main structure (1) and the male engage (159) of the longitudinal structure (160) is engaged in the female engage (161) of the base structure (158) being then inserted the rear transversal structure (162) followed by the front transversal structure (163) witch have a sliding engage (164) which is able to axially translate in relation to the longitudinal structure (160); the membrane (165), which incorporates a rope (166) in its extremities and the rope (166) is inserted in the slots (167) presented in the frontal end of the longitudinal structure (160) and in the extremities of the transversal structures (162) and (163) and a hook (168) incorporated in the rear part of the membrane (165) is then engaged in the engage (169) in the base structure (158), and the membrane (165) is thus tractioned finishing its assembling; the frontal transversal structure (163) extremities has two ropes (170) which has hooks (171) which is inserted in the supports (172) presented in the inflatable hulls (6) keeping the ropes (170) tractioned.

10. Portable boat, according to any one of claims

7 or 8, comprising a cover as in claim 9 wherein the membrane (165) is replaced by a solar flexible panel (189) which collects solar light to transform light radiation into electric current conducted by the cables (190) to the batteries and electronic components (17) and such electric current is used to drive the electric engine (19) and/or load the battery.