RU2835496C1 - Inflatable motor boat - Google Patents

Abstract

FIELD: ships and other floating facilities.

SUBSTANCE: invention relates to means of movement on water, in particular to inflatable boats with outboard motors operated in shallow water conditions. Inflatable motor boat includes a U-shaped hull in plan formed by open contour of inflatable boards and bow and an inflatable bottom attached to the hull and divided into at least three longitudinal segments, wherein a longitudinal tunnel is made in the lower part of the bottom in the middle segment. At that, inside each of inflatable boards at least one transverse bulkhead and at least one forming longitudinal bulkhead are installed, which is connected to transverse bulkhead and inner surface of boards so that it reduces width of cross section of inflatable board. Inflatable boards of the boat are inclined at an obtuse angle relative to the bottom, and the lower point of the bottom on the stern side is located below the inflatable boards.

EFFECT: increasing the effective area of the boat, namely increasing its capacity, while increasing its strength, speed and maintaining safety of its operation, including in conditions of shallow water and narrow sections of rivers.

12 cl, 7 dwg

Description

Field of technology

[0001] The invention relates to means of transportation on water, in particular to inflatable boats with outboard motors, used in shallow water conditions.

State of the art

[0002] Classic inflatable motor boats used for active recreation often consist of a U-shaped hull formed by an open contour of inflatable sides and a bow, and a bottom attached to the hull. At the same time, for the operation of such boats in shallow water, a longitudinal water-conduit tunnel is often made in the bottom. At the same time, boats intended for operation, including in shallow water conditions, most often have a small capacity, firstly, to avoid overloading and, secondly, to ensure the possibility of passing, including narrow sections of rivers and reservoirs.

[0003] In order to increase the capacity of a boat, its dimensions are usually simply increased, which affects both the weight of the boat, making the boat unsuitable for use in shallow water and on waterless sections of rivers and reservoirs, and depriving the boat of the ability to pass narrow sections of rivers. Moreover, since boathouses and hangars have standardized dimensions, it becomes necessary to change the location of the boat storage. Thus, it is extremely important when designing a boat with increased capacity to take into account its safety and maneuverability, which are necessary for comfortable operation of boats used in active recreation.

[0004] An inflatable boat according to patent No. RU 205051 U1 (published on 24.06.2021; IPC: B63B 7/080) is known from the prior art. The inflatable boat comprises a horizontal elastic partition along the entire length of each side and in part of the aft ends, attached inside the cutting elements of the shell; in the bow part there is a vertical elastic partition attached inside the cutting elements of the shell; along the entire length of each side and in part of the aft ends, additional horizontal elastic partitions are located parallel to the horizontal elastic partitions to form an open upper compartment, a central compartment and a lower compartment; each side is equipped with an emergency cylinder in the form of a closed inflatable container located in the inner region of the side, mainly in the upper compartment; the emergency cylinders are equipped with a filling valve located on the outer surface of the side.

[0005] The disadvantage of this boat is the lack of transverse bulkheads dividing the cylinder into sealed cavities. In addition, the lack of transverse bulkheads does not allow for an increase in the rigidity of the longitudinal bulkheads, which makes this boat less safe to operate. It is also important to note that the sides of this boat are at the same level as the bottom, which significantly reduces the maximum speed of the boat, since the sides play a role in its hydrodynamics. Moreover, since the bottom of the boat does not have a sinusoidal axial line (including the tunnel made in the bottom), this boat is less suitable for operation in shallow water conditions, as well as in waterless sections of rivers.

[0006] Also known is a boat according to patent No. RU 2101208 C1 (published 10.01.1998; IPC: B63B 7/08). The inflatable boat comprises inflatable sides, as well as bow and stern ends, made of interconnected elements of the shell cutting in the form of round cylinders made of elastic material, and a bottom attached to the sides, bow and stern ends. In this case, the boat is made with a means for changing the ratio between the height of the side and its width, which is located on at least one section of each side and is made in the form of a horizontal elastic diaphragm located in the center of the section and attached inside the elements of the shell cutting along the entire length of these sections of the sides with their division into two: upper and lower zones, equal along the perimeter of the section. Moreover, in these sections, the outer surface of the side is made in the form of a cylinder with parallel bases in the form of a closed flat algebraic curve of the Cassini oval type with a "waist", having a vertically located axis and a "waist" in the horizontal plane. Moreover, the distance between the vertices of the oval along its vertical axis is greater than the diameter of the base of the adjacent sections of the round cylinders, and the distance between any points of the oval located on the same horizontal is less than the diameter of the base of the adjacent sections of the round cylinders. In this case, the perimeter of the curve of the Cassini oval type with a "waist" is equal to the perimeter of the base of the round cylinders, and the central axis of the cylindrical surface with bases having the shape of the Cassini oval type with a "waist" coincides with the central axis of the adjacent round cylinders.

[0007] The disadvantage of this boat is the absence of a longitudinal bulkhead at the stern ends of the boat. It is also important to note that dividing the inflatable side into only two longitudinal sections, firstly, does not ensure safety during navigation, since in case of damage to the lower zone, the operation of the boat becomes impossible. Secondly, it only slightly increases the internal capacity of the boat. In addition, the sides of the boat are not made deflected, which also affects both the safety of operation and the internal capacity. It is also important to note that the sides of this boat are at the same level as the bottom or below it, due to which there is a significant decrease in the maximum speed of the boat, since the sides play a role in its hydrodynamics. Moreover, since the bottom of the boat does not have a sinusoidal axial line (including the tunnel made in the bottom), this boat is less suitable for operation in shallow water conditions, as well as in waterless sections of rivers.

[0008] Another known analogue is the inflatable boat according to patent No. RU 196669 U1 (published on 11.03.2020; IPC: B63B 7/00). This patent discloses a boat that includes a bow, stern ends, and an open contour of inflatable sides, where the latter are separated by elastic partitions of horizontal cross-section, attached inside the cutting elements of the shell, along the entire length of the sides with a division into upper and lower zones. In this case, the bow and stern ends are also separated by elastic partitions, some of which are of horizontal cross-section, and some of which are vertical, while the latter are also located in the inflatable sides.

[0009] The above-described boat provides for the division of the inflatable side only into two longitudinal sections, which, firstly, does not ensure safety during navigation, since in case of damage to the lower zone, the operation of the boat becomes impossible. Secondly, it only slightly increases the internal capacity of the boat. In addition, the sides of the boat are not made deflected, which also affects both the safety of operation and the internal capacity. It is also important to note that the sides of the said boat are below the bottom, due to which there is a significant decrease in the maximum speed of the boat, since the sides play a role in its hydrodynamics. Moreover, since the bottom of the boat does not have a sinusoidal axial line (including the tunnel made in the bottom), this boat is less suitable for operation in shallow water conditions, as well as in waterless sections of rivers.

The essence of the invention

[0010] The objective of the present invention is to create an inflatable motor boat with increased internal capacity while maintaining the strength of the boat and the safety of its operation.

[0011] This problem is solved by the present invention by achieving such a technical result as increasing the effective area of the boat, namely increasing its capacity, while increasing its strength, speed and maintaining the safety of its operation, including in shallow water conditions and narrow sections of rivers. The claimed technical result is achieved, including, but not limited to, thanks to:

· making a longitudinal tunnel in the middle segment of the inflatable bottom;

· installation of transverse bulkheads in the inflatable sides of the boat;

· installation of longitudinal bulkheads in the inflatable sides of the boat;

· such a connection of the longitudinal bulkheads with the inner surface of the sides that they reduce the width of the cross-section of the inflatable side;

· such installation of the sides, in which the lowest point of the bottom from the stern side is located below the inflatable sides.

[0012] More fully, the technical result is achieved by an inflatable motor boat, including a U-shaped hull in plan, formed by an open contour of inflatable sides and a bow, and an inflatable bottom attached to the hull, divided into at least three longitudinal segments, wherein a longitudinal tunnel is made in the lower part of the bottom in the middle segment. Moreover, inside each of the inflatable sides, at least one transverse bulkhead and at least one form-forming longitudinal bulkhead are installed, connected to the transverse bulkhead and the inner surface of the sides in such a way that it reduces the width of the cross-section of the inflatable side. In this case, the inflatable sides of the boat are made inclined at an obtuse angle with respect to the bottom, and the lower point of the bottom from the stern is located below the inflatable sides.

[0013] The U-shaped hull in plan is necessary to ensure the possibility of installing the motor on the stern end of the boat. At the same time, the fact that the hull is formed by an open contour of inflatable sides and the bow is necessary to ensure the buoyancy of the boat as a whole. Making the bottom inflatable is necessary both to ensure buoyancy and to reduce the overall weight of the boat (in comparison with boats with a rigid bottom), which increases the safety of operating the boat in shallow water. A longitudinal tunnel in the middle segment of the boat is also necessary to enable operating the boat in shallow water, since this allows raising the motor higher than the bottom of the boat. Longitudinal shaping bulkheads inside the sides are necessary both to increase the safety of operating the boat by dividing the side into sealed cavities, and for the direct shaping of the side with a smaller width. Reducing the width of the side, firstly, allows increasing the capacity of the boat while maintaining its standard overall dimensions and, secondly, increasing the height of the sides without increasing the overall width of the boat. This also has an impact on increasing the safety of operation, as it prevents water from getting inside the boat, increases its stability and allows the boat to maintain the ability to pass narrow sections of rivers. Transverse bulkheads are also necessary to form sealed cavities, but, in addition, they have a strengthening function of connecting with longitudinal bulkheads, which also provides increased tensile strength. The fact that the inflatable sides of the boat are made inclined at an obtuse angle relative to the bottom allows for an even greater increase in the capacity of the boat, up to 20-30% compared to a similar boat without inclined sides and with standard round cross-section cylinders. This also contributes to the safety of the boat by reducing the likelihood of it turning over or capsizing. The fact that the lower point of the bottom from the stern is located below the inflatable sides, in turn, allows for a significant increase in the speed of the boat by reducing the area of the wetted surface of the boat, as well as eliminating the sides from participating in the hydrodynamics of the boat.

[0014] The hull and bulkheads can be made of PVC (polyvinyl chloride) fabric. This material combines lightness, strength and elasticity, as well as water resistance, which is important for boats, and therefore also increases the strength and safety of the boat. At the same time, the density of the PVC fabric of the bulkheads can be less than the density of the PVC fabric of the hull. This additionally reduces the overall weight of the boat, and also makes the bulkheads more elastic, due to which they are able to withstand a greater pressure drop in the event of local damage to the cylinder.

[0015] Transverse bulkheads can be made of two parts of a truncated semi-oval shape in longitudinal section. This allows for increased operational safety, since if one of the parts of the bulkhead is breached, the second can remain in place and protect the sealed cavity limited by it from air leakage. The truncated semi-oval shape, in turn, reduces the likelihood of a bulkhead breach as a whole with significant pressure drops, since the truncated semi-oval has a small height.

[0016] The transverse bulkheads can be secured inside the sides by means of T-shaped power elements made of PVC fabric. T-shaped power elements additionally strengthen the joints, which affects the strength of the boat and, as a result, the safety of its operation. This forms a single internal power structure to increase the overall strength of the boat structure.

[0017] The shaping longitudinal bulkheads can be made with allowances on the side of the transverse bulkhead, which can be glued to the transverse bulkhead. This contributes to greater strengthening of the longitudinal bulkheads inside the sides, and also additionally strengthens the internal power structure and, as a result, the strength of the boat structure as a whole.

[0018] Each of the inflatable sides may include two shaping longitudinal bulkheads dividing the side into upper, central and lower compartments. This allows for a simultaneous increase in the safety of boat operation, due to the division of the side into a greater number of sealed cavities, and an increase in the capacity of the boat, namely its effective area, due to a greater reduction in the width of the sides. In this case, the cross-section of the inflatable side may be formed in the form of three successively intersecting ovals. This also additionally allows for an increase in the height of the side, which, among other things, increases the safety of operation.

[0019] The difference in height between the bottom of the boat and the bottom of the inflatable sides can be from 2 to 15 cm. This allows the boat to be faster while still ensuring sufficient reliability of the sides being attached to the bottom.

[0020] The centerline of the bottom can have a sinusoidal shape. This allows for increased boat maneuverability in shallow waters and also ensures efficient operation of the boat's water intake.

[0021] An interceptor with flexible ends can be made on the bottom of the boat. This allows for additional tight fit of the boat's water intake to the tunnel in all operating modes and in all positions of the water intake.

Description of drawings

[0022] The subject matter of the present application is described in paragraphs and clearly stated in the claims. The above-mentioned objects, features and advantages of the invention are apparent from the following detailed description, taken in conjunction with the accompanying drawings, which show:

[0023] Fig. 1 shows an isometric view of an inflatable motor boat according to the present invention.

[0024] Fig. 2 shows the internal structure of the bulkheads in the inflatable sides in the first embodiment, according to the present invention.

[0025] Fig. 3 shows the internal structure of the bulkheads in the inflatable sides in the second embodiment, according to the present invention.

[0026] Fig. 4 shows the internal structure of the bulkheads in the inflatable sides in the third embodiment, according to the present invention.

[0027] Fig. 5 shows a view of a boat, the sides of which are made inclined from the vertical to the outside, from the stern end, according to the present invention.

[0028] Fig. 6 is an isometric view of a boat bottom with bulkheads according to the present invention.

[0029] Fig. 7 is a schematic view of a bottom bulkhead according to the present invention.

[0030] These figures are explained by the following positions:

Position 1 – boat hull;

Position 11 – inflatable sides;

Position 111 – transverse bulkheads of inflatable sides;

Position 112 – longitudinal bulkheads;

Position 113 – cross-section of the inflatable side;

Position 114 – aft ends;

Position 115 – upper compartment of the inflatable side;

Position 116 – central compartment of the inflatable side;

Position 117 – lower compartment of the inflatable side;

Position 12 – nose;

Position 121 – transverse bulkhead of the bow;

Position 2 – bottom;

Position 21 – first longitudinal segment of the bottom;

Position 22 – second (middle) longitudinal segment of the bottom;

Position 221 – longitudinal tunnel;

Position 23 – third longitudinal segment of the bottom;

Position 24 – longitudinal bulkheads of the bottom;

Position 3 – aft end.

Detailed description of the invention

[0031] In the following detailed description of the embodiment of the invention, numerous implementation details are provided in order to provide a clear understanding of the present invention. However, it will be obvious to one skilled in the art how the present invention can be used with or without these implementation details. In other instances, well-known methods, procedures, and components have not been described in detail in order not to unnecessarily obscure the features of the present invention.

[0032] Furthermore, it is clear from the above disclosure that the invention is not limited to the embodiment provided. Numerous possible modifications, changes, variations and substitutions that retain the essence and form of the present invention are obvious to those skilled in the art.

[0033] Fig. 1 shows an isometric view of an inflatable boat according to the present invention. The inflatable motor boat includes a hull 1 of a U-shape in plan, formed by an open contour of inflatable sides 11 and a bow 12 , as well as an inflatable bottom 2 attached to the hull 1. The bottom 2 is divided into at least three longitudinal segments ( 21 , 22 , 23 ). In this case, in the lower part of the bottom 2 , in the middle segment 22 , a longitudinal tunnel 221 is made. The presence of a water-inlet tunnel 221 makes it possible to install a jet engine on the boat above the level of the bottom 2 of the boat. Due to this, the boat can pass through shallow sections of rivers and reservoirs. A transom can be located on the stern end 3 , to which an outboard engine is attached.

[0034] Fig. 2 shows an isometric view of the hull 1 of the boat and its internal elements. Thus, in Fig. 2 it can be seen that at least one transverse bulkhead 111 and at least one shaping longitudinal bulkhead 112 are installed inside each of the inflatable sides 11. In this case, the shaping longitudinal bulkhead 112 is located along the entire length of each side 11 and is connected to the transverse bulkhead 111 and the inner surface of the side 11 so that it reduces the width of the cross-section 113 of the inflatable side 11. In particular, in the presence of only one longitudinal shaping bulkhead 112 , as shown in Fig. 2, the cross-section 113 of the side 11 has a shape similar to the shape of a Cassini oval. The cross-section of the bow 12 of the hull 1 , in turn, may not be changed and remains circular or approximately circular.

[0035] The transverse bulkhead 111 is necessary, firstly, to divide the inflatable side 11 into hermetic cavities in order to increase the reliability of the structure. This prevents the entire cylinder from deflating in the event of any local breach of tightness, i.e. if it is damaged. In this case, it is preferable to install the transverse bulkhead 111 so that it divides the inflatable side 11 into approximately equal volume compartments. The number of compartments (and, as a consequence, the number of transverse bulkheads 111 ) is selected so that the failure of one of them does not lead to a complete loss of buoyancy. In this case, it is preferable to place the bulkheads 111 so that the compartments are symmetrical relative to the midship. Then, in an emergency situation and a breach of the local tightness of the cylinder, the bulkheads 111 will perceive the air pressure of the adjacent compartments and will sag towards the least pressure, namely, into the damaged compartment. In this way, it is possible to avoid the boat heeling even at full load.

[0036] The second important function of the transverse bulkhead 111 is to increase the rigidity and strength of the fixation of the shaping longitudinal bulkhead 112. Thus, the shaping longitudinal bulkhead is connected not only to the inner surface of the inflatable side cylinders 11 , but also to the transverse bulkhead 111 , due to which the tear strength of the longitudinal bulkhead 112 in the area of the transverse bulkhead 111 is significantly increased.

[0037] In this case, the transverse bulkhead 111 can be made in different shapes in its longitudinal section, in particular, it can have a triangular, trapezoidal, semicircular or semi-oval shape (including the shape of a truncated circle or a truncated oval). Flat bulkheads 111 of the membrane type can also be used. The specific shape of the longitudinal section of the transverse bulkheads 111 can be selected based on the geometry of the boat, including based on the volume of the formed sealed cavities, since this volume determines the pressure drop on the bulkhead 111 in the event of local damage to the cylinder. The preferred option is the shape of a truncated oval, truncated circle or trapezoidal, since bulkheads 111 having a semicircular, semi-oval or triangular shape are more likely to tear off with significant pressure drops due to their greater height.

[0038] In addition, the transverse bulkheads 111 can be made of two elements, each of which has a triangular, trapezoidal, semicircular or semi-oval shape in longitudinal section, in contact with each other ends. This contributes to increased operational safety, since if one bulkhead 111 is torn off, the second may remain undamaged. It is important that the shape of the larger end of the transverse bulkheads 111 repeats the shape of the cross-section of the inflatable side 11. Thus, the transverse bulkheads 111 will divide the inflatable side 11 into sealed cavities and increase the rigidity and strength of the fixation of the shaping longitudinal bulkhead 112 , without disturbing the natural shaping of the cylinder due to only the longitudinal bulkheads 112 .

[0039] The shaping longitudinal bulkhead 112 is necessary both for dividing the inflatable side 11 into sealed cavities (similar to the transverse bulkhead 111 ) and for directly shaping the cylinder of the inflatable side 11 . The longitudinal bulkhead 112 extends along the entire inflatable side 11 , including the aft ends 114 , as shown in Fig. 2. In this case, the longitudinal bulkhead 112 has a smaller width than the chord of the inflated cylinder at the location of the installation of the longitudinal bulkhead 112 . Thus, if in the absence of the described longitudinal bulkheads 112 the inflatable side 11 would have a circular cross-section, then when installing a longitudinal bulkhead 112 with a smaller width in the inflatable side 11 , such a bulkhead locally tightens it and sets the geometry of the cross-section 113 of the cylinder along the entire length of the longitudinal bulkheads 112 .

[0040] The described contraction of the inflatable side 11 balloon can be carried out either by means of one longitudinal bulkhead 112 in order to give the balloon in cross-section 113 a shape close to the shape of a Cassini oval. In this case, it is preferable to install the longitudinal bulkhead 112 approximately at the middle of the balloon height. This is due to the fact that the bulkheads 112 divide the balloon into sealed cavities, which are preferably left approximately equal in volume. In another embodiment, each of the inflatable sides 11 can include two shaping longitudinal bulkheads 112 dividing the side 11 into upper 115 , central 116 and lower 117 sealed compartments, as shown in Fig. 3. The installation height of the longitudinal bulkheads 112 in this case is also determined on the basis of the volumes of each of the formed compartments ( 115 , 116 , 117 ), i.e. so that approximately equal volume compartments ( 115 , 116 , 117 ) are formed. In this case, a cross-section 113 of the side 11 is formed, similar to three successively intersecting ovals. Moreover, the bulkheads 112 pass exactly between the two intersection points.

[0041] Reducing the width of the inflatable side 11 bladder by tightening the bladder using the longitudinal bulkhead 112 makes it possible to increase the effective area of the boat in which people, equipment and other objects can be placed, i.e. to increase the capacity of the boat. It is important to note that with this method of increasing the capacity of the boat, its standard dimensions are maintained, in particular its overall width and length. This makes it possible, for example, to pass the same narrow sections of rivers and other bodies of water that it could pass with its standard capacity, and also to place the boat in the same slipways and hangars that have standardized dimensions. In this case, it is the option with two longitudinal bulkheads 112 that is preferable. One bulkhead 112 may not hold the edges of the bladder firmly enough, which may lead to a more rapid rupture between the inner surface of the bladder and the edge of the bulkhead 112. Thus, a greater number of bulkheads 112 increases the structural strength of the hull 1 of the boat. In addition, with multiple longitudinal bulkheads 112, the load on the cylinder will be distributed more evenly, which can contribute to improving the overall performance and durability of the boat. Also, a larger number of bulkheads 112 allows for a narrower cylinder width, which leads to an even greater increase in the capacity of the boat.

[0042] However, it is preferable to limit oneself to just two longitudinal partitions 112 , since despite the possibility of further narrowing the cylinders and further increasing the structural strength of the hull 1 , the introduction of more than two longitudinal bulkheads 112 may lead to the following problems. Firstly, the overall weight of the boat will increase, due to which the maneuverability, speed and controllability of the boat during its operation will deteriorate. This will especially affect the operation of the boat in shallow water conditions, since such sections of rivers and reservoirs are impassable for heavy boats. This will also complicate access to maintenance and repair of the boat due to the large number of internal elements of the hull 1 . In addition, an excessive increase in structural strength will inevitably lead to the loss of flexibility and elasticity by the cylinders. Thus, the material of the cylinders of the inflatable sides 11 may become excessively stretched, due to which any external mechanical impact on the cylinder may lead to local damage. Thus, two shaping longitudinal bulkheads 112 in the inflatable side 11 make it possible to improve the technical result achieved by the present invention, further increasing the capacity of the boat and increasing its strength and, as a consequence, the safety of operation without compromising the flexibility and elasticity of the hull 1 , as well as excessively increasing the weight of the boat.

[0043] It is also important to note that the reduction in the width of the sides 11 leads to an increase in their height. Higher sides 11 help to reduce the likelihood of water entering the boat when encountering waves or when the weight inside the boat increases, and also increase the boat's resistance to capsizing, especially in adverse weather conditions or in the presence of external factors such as wind or waves.

[0044] As mentioned earlier, the cross-section of the bow 12 of the hull 1 may not be changed and remain circular or approximately circular. In this case, the shape of the longitudinal bulkhead 112 is preferably made to expand in the immediate vicinity of the bow 12 of the hull 1. Thus, such a shape of the bulkhead 112 will prevent the occurrence of additional deformations of the cylinder and the bulkhead 112 near the bow 12 and, as a result, will prevent a local rupture of the material. In the remaining part of the side 11, the bulkhead 112 should preferably have a constant width up to the aft ends 114. Inside the aft ends 114 , in turn, the longitudinal bulkhead 112 should gradually narrow. The bow 12 of the hull 1 can also include one transverse bulkhead 121 for forming sealed cavities, as shown in Fig. 4.

[0045] The shaping longitudinal bulkheads 112 , as well as the transverse bulkheads 111, can be made of the same material as the inflatable side tubes 11. This, firstly, allows them to be made as elastic and to retain all the necessary characteristics of the material used, in particular lightness to reduce the overall weight of the boat, as well as water resistance and strength to ensure safety. One such material is polyvinyl chloride (or PVC). PVC has good resistance to water, flexibility, strength and lightness. This material is preferable for the manufacture of bulkheads ( 111 , 112 ) and the entire hull 1 of the boat as a whole. Since the longitudinal bulkheads 112 serve not only for shaping, but all the bulkheads ( 111 , 112 ) contribute to the formation of sealed cavities, the strength of the bulkheads ( 111 , 112 ) plays an important role in the safety of the boat operation. Thus, in case of local damage to the cylinder and a pressure drop associated with local damage, the probability of their rupture on the bulkheads ( 111 , 112 ) is reduced. In addition, the manufacture of bulkheads ( 111 , 112 ) from the same material simplifies the production process, since there is no need to use different materials and technologies for their connection. This is due to the compatibility of materials. Thus, in particular, when welding elements from one material (for example, PVC), a chemical connection occurs at the molecular level, which ensures a stronger and more stable connection than when using different materials.

[0046] In addition to PVC fabric, other types of fabrics such as Hypalon (nylon-nitron), neoprene, fabric with a polyurethane coating, rubber and other materials can also be used. Nylon-nitron is a synthetic rubber material that has a high resistance to ultraviolet radiation and mechanical damage. Neoprene (polychloroprene) is another type of synthetic rubber that can be used for inflatable sides 11. Neoprene has good elasticity, flexibility and resistance to ultraviolet radiation, which makes it suitable for various operating conditions. The manufacture of sides 11 from rubber is possible due to its elasticity and strength. At the same time, nylon-nitron, neoprene and rubber are heavier materials than PVC, and therefore are not preferable for the manufacture of sides 11 and bulkheads ( 111 , 112 ), within the framework of the present invention. In addition, it is possible to manufacture bulkheads ( 111 , 112 ) and sides 11 from fabric with a polyurethane coating (PU), which is usually used in combination with other fabrics to create durable and abrasion-resistant inflatable sides 11. The polyurethane coating makes the material waterproof and UV-protected. However, this material has less strength and resistance to mechanical loads than PVC, which is why it is also not a preferred implementation option.

[0047] It is also important to note that the bulkheads ( 111 , 112 ) are preferably made of the same material as the sides 11 (for example, PVC), but with a lower density. Firstly, this allows to reduce the overall weight of the boat, which in turn improves the maneuverability and efficiency of the boat when moving on water. Secondly, which is more important within the framework of the present invention, the use of a less dense material for the bulkheads ( 111 , 112 ) allows to increase their strength and safety. This is due to the fact that the cylinders of the inflatable sides 11 are more often exposed to external mechanical influences and require greater puncture strength. While the bulkheads ( 111 , 112 ), being internal elements of the sides 11 , are more susceptible to various stretches arising due to local deformations of the sides 11 under the action of external mechanical forces or associated with pressure drops in the event of local damage to the cylinder. Less dense PVC material options have higher elasticity and flexibility compared to denser options. This is due to the fact that a lower density of the material usually means that the intermolecular bonds are less dense, which in turn makes the material more flexible and elastic. Thus, the reduced density of the bulkhead material ( 111 , 112 ) allows for increased safety of boat operation as a whole.

[0048] The transverse bulkheads 111 can be secured inside the sides 11 by means of T-shaped load-bearing elements made of PVC fabric (or of another material in the event that the bulkheads 111 and sides 11 themselves are made of another material) (not shown in the Figures). The T-shaped load-bearing elements are two strips of material, bent in an L-shape and connected by one of the edges along the outer side, forming a T-shape in the cross-section. The load-bearing element is secured with a flat side (on which there are no corners) to the inner surface of the cylinders along the perimeter of the cross-section 113 of the inflatable side 11. The transverse bulkhead 111 is secured to the remaining section directed toward the center of the cross-section 113 of the side 11. Moreover, if the bulkhead 111 consists of two elements, one of them is secured to one side of the section, and the second to the opposite side. Similarly, the longitudinal bulkheads 112 and the transverse bulkhead 121 of the bow part 12 can be fastened in the cylinder, however, in the case of the longitudinal bulkheads 112 , the load-bearing element is fastened with the flat side along the longitudinal section of the inflatable side 11. In this case, at the junction of the load-bearing elements of the longitudinal bulkheads 112 and the transverse bulkheads 111, the load-bearing element of the longitudinal bulkhead can break off, and its ends are fastened to the load-bearing element of the transverse bulkhead 111. This fastening option is preferable, since T-shaped load-bearing elements usually have high strength and are capable of withstanding significant loads. This ensures the reliability of the structure and increases the safety of boat operation even in extreme conditions. Moreover, such load-bearing elements ensure uniform load distribution along the entire length of the bulkheads ( 111 , 112 ), which contributes to improved stability and controllability of the boat. Moreover, the fact that the power elements are also made of PVC makes them elastic, light and durable.

[0049] Instead of T-shaped load-bearing elements, L-shaped elements formed from a single strip of material or other known fastening methods in this field of technology can also be used. In this case, the fastening of the load-bearing elements to the sides 11 or to the bulkheads ( 111 , 112 ) can be carried out by welding. Welding is the most preferable option, since it forms a more integral frame from a set of elements welded to each other. Moreover, welding also ensures good tightness of the connection, which is important for the sides 11 of inflatable boats in order to avoid water penetration into the cylinder or other parts of the structure, as well as air leakage from the cylinders. However, in addition to welding, various adhesives or adhesive sealants can also be used, although such a connection is less reliable.

[0050]As mentioned earlier, in the places where the power elements of the longitudinal bulkheads join112and transverse bulkheads111the longitudinal bulkhead load-bearing element may break off and its ends may be attached to the transverse bulkhead load-bearing element111. In this case, the longitudinal bulkheads112may have allowances on the transverse bulkhead side111, which are glued to the transverse bulkhead111(on (Not shown in the figures). This solution allows to significantly increase the tear strength of the longitudinal bulkhead.112in the area of the transverse bulkhead111.

[0051] The inflatable sides 11 of the boat can be connected to the bow 12 and the bottom 2 of the boat so that the sides 11 are positioned deflected to the outside from the vertical, as shown in Fig. 5. In Fig. 5, the general vertical of the boat is shown by a dashed line, and the central axis of the cross-section 113 of the cylinder is shown by a dotted line. Due to the small deviation of the sides 11 from the vertical, the internal capacity of the boat is additionally increased. Such a deviation can be implemented in several ways. Firstly, rigid frame partitions can be implemented inside the boat, forcibly deflecting the sides 11. However, this will reduce the flexibility of the boat, and also increase its weight, in connection with which this embodiment is not preferable. In addition, it is possible to deflect the sides 11 using a rigid stern end 3 , which has, in fact, a trapezoidal shape. However, such a method of deflection will only allow for a local deflection in the stern section, while the cylinders will gradually return to the vertical closer to the bow 12 of the hull 1 . The preferred variant, within the framework of the present invention, is such a fastening of the sides 11 in which the lower section 117 of the cylinder of the inflatable side 11 is connected approximately at ¼ of the perimeter of its cross-section 113 with the bottom 2 closer to the edge of the lower surface of the bottom 2 . The connection of these segments to each other facilitates the deflection of the cylinders along the entire perimeter of the inflatable sides 11 . In this case, this method of connection can be combined with the method of deflecting the sides 11 by means of a trapezoidal stern end 3 . In general, the deflection of the cylinders of the inflatable sides 11 from the vertical allows not only to additionally increase the interior space of the boat, but also to increase its safety, namely, resistance to capsizing and rolling over. This is due to the fact that when the sides 11 are deflected to the side, the center of gravity of the boat is shifted closer to the bottom 2 of the boat, which creates a greater moment of force directed in the direction opposite to the deflection of the sides. In addition, when using a boat with vertical inflatable sides 11 , the geometry of the sides 11 as a whole allows the boat to turn 90 degrees until the side 11 is in full contact with the water surface. However, if the sides 11 are deflected by an angle α, then until the side 11 is in full contact with the water surface, the boat can only turn 90-α degrees. At such an angle of rotation, the boat will return to its normal position under the action of gravity, whereas when turning 90 degrees, the boat can turn over with the bottom 2 upward. Moreover, the deflection of the sides 11 also makes the boat less susceptible to the action of waves, which also helps to reduce the likelihood of capsizing.

[0052] Also, as can be seen in Fig. 5, the lower point of the bottom 2 from the stern side is located below the inflatable sides 11 . This contributes to several significant advantages of this boat at once. Firstly, it helps to improve the stability of the boat, especially in rough conditions or when moving at high speed. The low bottom 2 lowers the center of gravity, which reduces the likelihood of pitching and increases stability. Also, when the bottom 2 is installed lower, the boat can withstand more weight of cargo or passengers without losing stability. This is especially important for commercial or fishing boats, where it is necessary to carry a lot of cargo. In addition, the low bottom 2 improves the maneuverability and general behavior of the boat on the water, making control more predictable and comfortable.

[0053] Moreover, in Fig. 5 it is seen that the lowest point of the bottom 2 is located at the edges of the first 21 and last 23 longitudinal segments of the bottom 2 near the water passage tunnel 221 . The remaining points are significantly raised relative to the lower one so that the lower surface of the bottom 2 in its cross-section essentially has the shape of an oval chord (without taking into account the water passage tunnel 221 ). In general, the raised sides 11 relative to the bottom 2 in itself reduces the wetted surface (the part of the boat that contacts the water) of the lower part of the boat, but such a shape of the bottom 2 contributes to an even greater reduction in the area of the wetted surface of the bottom 2 itself. The reduction of the wetted surface of the bottom 2 of the boat has a positive effect on the speed. A smaller contact area means less water resistance, which increases the speed of the boat when moving. Thus, this improves the hydrodynamics of the boat. Moreover, the reduction of the wetted surface reduces the impact of turbulence and vortex formation, which also contributes to an increase in speed. Improved hydrodynamics of the boat allows it to reach the required speed, spending less engine energy on it.

[0054]The difference in the height of the bottom of the bottom2and the lowest point of the inflatable sides11can be from 2 to 15 cm. This allows to increase the speed of the boat and at the same time ensure sufficient reliability of fastening of the sides11to the bottom2. If the difference in height is less than 2 cm, the sides11lower, which is why, when the boat is heavily loaded, it can begin to participate in hydrodynamics. This can significantly reduce the speed of the boat, as well as reduce its stability. When the sides are raised,11the area of the side joints is reduced by more than 15 cm11with bottom2, which increases the likelihood of the sides being torn off at the bottom and, as a consequence, reduces its reliability during operation. In view of the above, raising the sides112-15 cm relative to the bottom of the bottom2is optimal. However, these figures are given for a boat, the height of the sides11which ranges from 0.55 to 0.65 m, the width of the sides11from 0.35 to 0.45 cm, and the bottom height from 0.20 to 0.30 m. Thus, the upper limit can vary depending on the size of the sides11and bottoms2of a specific boat. It is preferable to raise the sides so that at least 5 cm from the height of the bottom5remained in contact with the sides11, i.e. attached to the sides11,or, to Bottom Height Ratio2, in contact with the sides11, and the difference between the bottom point2and the lower point of the inflatable sides11was from 1 to 2. With such parameters, the boat loaded with 200 kg can develop up to 50 km/h. With a larger load (800 kg), the boat speed can reach 36 km/h. The speeds are indicated using a motor with parameters 2T/50 hp/220 kgf.

[0055] The centerline of the bottom 2 , in turn, can have a sinusoidal shape. This allows increasing the boat's passability in shallow water, as well as ensuring the efficient operation of the water intake (not shown in the Figures) of the boat. A sinusoidal shape is understood to be a shape close to a sinusoid with a constant or variable amplitude. In this case, the tunnel 221 also has a shape close to a sinusoid in the longitudinal section (or only the shape of a part of the sinusoid period, depending on its length in relation to the length of the bottom 2 ). This allows creating an area of increased pressure at the entrance to the tunnel 221 , and allows more efficient direction of the water flow into the inclined tunnel 221 .

[0056] In this case, a plurality of longitudinal bulkheads 24 can be made in the bottom 2 , for example, as shown in Fig. 6. Then each of the bulkheads 24 will also have a shape close to a sinusoid, as shown in Fig. 7, where the solid line shows the bulkhead 24 , the dotted line shows the sinusoid, and the dash-dotted line shows a line close to a sinusoid. In this case, such longitudinal bulkheads 24 will simultaneously play a form-generating function for giving the bottom 2 a sinusoidal shape, as well as the function of forming sealed cavities, as described earlier. By a plurality of bulkheads 24 it is understood that there can be any number of them. In fact, this depends on the density and elasticity of the material of the bottom 2 (i.e., how much this material lends itself to shaping), as well as on the required number of sealed cavities (preferably three, accordingly, there should be at least two longitudinal bulkheads 24 in the bottom). Fig. 6 shows only one of such examples, but it is obvious to a specialist in the field of technology how to select a specific number of bulkheads 24 . In this case, everything that was previously said about the bulkheads 112 of the sides 11 is also applicable to the bulkheads 24 of the bottom 2 .

[0057] An interceptor with flexible ends (not shown in the Figures) can be made on the bottom 2 of the boat. The interceptor, in general, allows for improved boat controllability, especially when turning or when moving at high speed. They can help reduce the lateral slip of the boat, which makes control more stable and predictable. In addition, they can also increase the stability of the boat, including reducing pitching, especially in rough water or in adverse weather conditions. This also allows for reduced water resistance and, thus, improved hydrodynamic properties of the bottom 2 .

[0058] Flexible tips are flexible or movable ends of the interceptor structure that can be attached to its edges or ends. These flexible elements can have different shapes and be made of different materials (rubber, plastic, etc.) depending on the specific design. Their main function is to help soften impacts, by providing the necessary flexibility and cushioning, and to reduce the risk of damage to the boat or the interceptor itself when colliding with obstacles or when interacting with other objects or vessels.

[0059] Moreover, the use of flexible tips allows for additional tight fit of the boat water intake to the tunnel 221 in all operating modes and in all positions of the water intake. The boat water intake is typically located in the tunnel 221 , which may be located at the bottom of the boat. The purpose of the tunnel 221 is to improve the hydrodynamic characteristics of the boat. Flexible tips of the interceptor can help to ensure a tight fit of the water intake to the tunnel 221 , which reduces water resistance and increases the efficiency of the water intake. In addition, when the boat moves at high speed or maneuvers, a problem of water seepage between the water intake and the tunnel 221 may occur. This may lead to a loss of efficiency of the water intake and a deterioration in the characteristics of the boat. Flexible interceptor tips help fill the space between the water intake and tunnel 221 , preventing water seepage and ensuring more efficient operation of the water intake system.

[0060] It is important to note that all additional features of the inflatable motorboat, in accordance with the present invention, can be used separately, in any combination or all at the same time. In this case, the inclusion of additional features will lead to the achievement of the corresponding technical results described above, including improving the main technical result achieved.

[0061] The present application materials present a preferred disclosure of the implementation of the claimed technical solution, which should not be used as limiting other, particular embodiments of its implementation that do not go beyond the scope of the requested scope of legal protection and are obvious to specialists in the relevant field of technology.

Claims (16)

1. Inflatable motor boat, including: - a U-shaped hull in plan, formed by an open contour of inflatable sides and a bow section, - an inflatable bottom attached to the hull, divided into at least three longitudinal segments, with a longitudinal tunnel made in the lower part of the bottom in the middle segment, wherein at least one transverse bulkhead and at least one longitudinal bulkhead are installed inside each of the inflatable sides, connected to the transverse bulkhead and the inner surface of the sides in such a way that it reduces the width of the cross-section of the inflatable side, In this case, the inflatable sides of the boat are made inclined at an obtuse angle relative to the bottom, and the lower point of the bottom from the stern side is located below the inflatable sides. 2. An inflatable motor boat according to item 1, characterized in that the hull and bulkheads are made of PVC fabric. 3. An inflatable motor boat according to item 2, characterized in that the density of the PVC fabric of the bulkheads is less than the density of the PVC fabric of the hull. 4. An inflatable motor boat according to item 1, characterized in that the transverse bulkheads are made of two parts of a truncated semi-oval shape in longitudinal section. 5. An inflatable motor boat according to item 1, characterized in that the transverse bulkheads are secured inside the sides by means of T-shaped power elements made of PVC fabric. 6. An inflatable motor boat according to item 5, characterized in that the T-shaped power elements are welded to the inner surface of the inflatable sides and to the bulkheads. 7. An inflatable motor boat according to item 1, characterized in that the shaping longitudinal bulkheads are made with allowances on the side of the transverse bulkhead, which are glued to the transverse bulkhead. 8. An inflatable motor boat according to claim 1, characterized in that each of the inflatable sides includes two shaping longitudinal bulkheads dividing the side into upper, central and lower compartments. 9. An inflatable motor boat according to item 8, characterized in that the cross-section of the inflatable side is formed in the form of three successively intersecting ovals. 10. An inflatable motor boat according to item 1, characterized in that the difference in the height of the lower point of the bottom and the lower point of the inflatable sides is from 2 to 15 cm. 11. An inflatable motor boat according to item 1, characterized in that the axial line of the bottom has a sinusoidal shape. 12. An inflatable motor boat according to item 1, characterized in that an interceptor with flexible ends is provided on the bottom of the boat.