EP1514794B1 - Boat hull - Google Patents
Boat hull Download PDFInfo
- Publication number
- EP1514794B1 EP1514794B1 EP04021186A EP04021186A EP1514794B1 EP 1514794 B1 EP1514794 B1 EP 1514794B1 EP 04021186 A EP04021186 A EP 04021186A EP 04021186 A EP04021186 A EP 04021186A EP 1514794 B1 EP1514794 B1 EP 1514794B1
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- EP
- European Patent Office
- Prior art keywords
- hull
- tubular members
- tubular member
- hull according
- boat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000000463 material Substances 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000004026 adhesive bonding Methods 0.000 description 4
- 239000011247 coating layer Substances 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B39/00—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B7/00—Collapsible, foldable, inflatable or like vessels
- B63B7/06—Collapsible, foldable, inflatable or like vessels having parts of non-rigid material
- B63B7/08—Inflatable
- B63B7/082—Inflatable having parts of rigid material
Definitions
- the present invention relates to a boat hull and particularly to a hull having improved safety and stability characteristics.
- the currently known boats can be essentially divided in two typologies, i.e. boats with a rigid structure without any tubular member and boats with a rigid structure provided with a sole tubular member entirely surrounding the perimeter thereof.
- RIB Ribdenum Inflatable Boat
- the present invention pertains to the field of the boats having a rigid hull, i.e. boats with conventional rigid hulls and boats with RIB hulls.
- a conventional rigid-hull boat is ideal with a flat sea surface, or however with a calm sea, and at the same characteristics of the boat, it allows to reach a higher speed than the boats with a RIB hull.
- aerodynamic drag becomes a non-negligible contribution to the hydrodynamic drag and with a rigid hull a smaller resistant section is exposed to the air.
- the boats with a conventional rigid hull generally have a better appearance.
- the boats with a RIB hull are more suitable to sail in rough sea conditions because, at the same width of the rigid hull, the inflatable tubular member surrounding the hull perimeter increase the "support base" in the water and greatly increases the stability and buoyancy of the boat.
- the latter characteristics are useful, regardless of the conditions of the sea, when the hull is stationary or moving at a low speed, i.e. when the hydrodynamic pressure is poor or negligible.
- tubular members are often preferred for those boats intended for dangerous missions, such as the fight against smuggling or clandestine immigration.
- the tubular members are inflatable and provide the boats with particular characteristics, such as greater reliability in terms of buoyancy in case of collision, greater protection against shocks and better stability under rough sea conditions.
- the boats with tubular members are bulkier than those without, and their greater section is a drawback in terms of air resistance upon forward speed increase.
- WHO 02/092421 A1 discloses a prefabricated boat having a hull according to the preamble of claim 1.
- the hull comprises a rigid structure and a pair of tubular members fixable to the rigid structure at the perimeter thereof.
- the tubular members comprise an inflatable casing made of a flexible material and are shaped and sized such as to only partially cover the hull perimeter in order to increase buoyancy but minimize frictional resistance exerted by the tubular members.
- a particular object of the present invention is to provide a novel type of boat allowing to change the overall width of the hull as desired, while maintaining the size of the rigid hull unchanged.
- Another particular object of the present invention is to provide a novel type of boat provided with a hull to be easily changed into any of the rigid hull boat typologies, as desired.
- At least two distinct tubular members are provided which are attached to the respective flanks of the hull.
- Each of the tubular members has a lower length than the flank length.
- the tubular members are assembled at the hull stern portion and have a tapered shape towards the bow.
- the tubular members are removably attached to the hull rigid structure, preferably at respective recessed housings provided in the hull rigid structure.
- Each of the tubular members comprises an inflatable casing made of flexible material and there are preferably provided means to retract the inflatable casing into the corresponding recessed housing when the tubular member is in the deflated condition.
- the hull rigid structure comprises one or more projecting rigid parts at the bow portion. These projecting parts are shaped such as to prevent the bow from sinking in the water under rough sea conditions.
- the width of the boat can be increased while maintaining the width of the rigid hull unchanged, thereby obtaining a better buoyancy and stability performance than a rigid hull without any tubular member.
- the solution provided by the present invention thus combines the advantages of both hull typologies.
- the tubular members are more useful mainly aft of the boat, where most of the boat weight is charged when the bow of the hull does not touch the water.
- the tubular member section is thus preferably tapered, i.e. wider aft and narrower fore of the boat.
- the rigid fore portion optionally provided with the above projecting rigid parts, can be shaped such as to keep the overall increase in the boat drag within acceptable values, and consequently, not prejudice the boat performance.
- a hull with partial tubular members has a number of advantages compared to one provided with a sole tubular member extending all along the flank thereof because that part of the sole tubular member normally unused is eliminated. Indeed, the working tubular part is aft of the boat, whereas the part fore of the boat increases the overall drag of the boat, both from a hydrodynamic and aerodynamic point of view, by increasing the surface exposed to the wind and waves.
- both safety and versatility of use of the boat are increased, thus providing a boat that can be easily manufactured and adapted to the various usage situations and sea conditions in the area of operation.
- Figure 1 illustrates a stern portion of a rigid hull 10 at which a tubular member 20 is fixed to the side flank of the hull.
- a corresponding tubular member 20 (not shown) is fixed to the opposite flank, such as to provide a system capable of ensuring improved performance in terms of protection and lateral stability.
- a hull with partial tubular members is thus provided.
- each tubular member 20 is fixed at a recessed housing 11 provided within the rigid structure of the hull 10.
- each tubular member 20 is removably fixed to the hull 10 through particular fixing means ensuring a strong retention.
- the fixing means comprise one or more longitudinal "sliding rods" 30, such as that represented in greater detail in the view from Figure 3 .
- Each longitudinal sliding rod 30 is formed by a rope 31 made of a textile material, or in a rubber material which is optionally equipped with a metal insert, which is made integral to the tubular member 20 through a coating layer 32 of a material either consistent with or identical to the tubular member 20.
- the bond between the coating layer 32 and the outer surface of the tubular member 20 is preferably obtained by gluing the mutually contacting surfaces.
- Each sliding rod 30 is fitted within a guide element 12 integral with the hull 10 and provided with a groove 13 having such shape and size as to allow a sliding engagement of the sliding rod 30.
- the guide elements 12 are preferably arranged in the hull 10 in such a position as to allow a same tubular member 20 to be mounted indifferently to the right or left flanks of the hull.
- the tubular members 20 are made such as to be independently mounted to the left or right flanks of the same hull 10, with considerable advantages in terms of cost.
- Figure 4 shows the fixing of the front part of the tubular member 20, at which there is provided an end portion 21 fastened to the hull 10 by means of screws 22 and nuts 23 fitted within corresponding through holes 24 drilled in the same end portion 21.
- the front locking portion 21 of the tubular member 20 consists of a base element 40 made of rubber for an insert 41 made of metal or rigid plastic material to be incorporated therein.
- the rigid insert 41 can be either drowned in the rubber of the base element 40 ( Figure 5 ), or fitted therein and covered with a rubber layer ( Figure 6 ) fixed for example by gluing.
- the locking portion 21 provided with the rigid insert 41 enables the fixing to the hull 10 by means of the through screws 22 such that the heads of the screws do not protrude from the upper surface of the flank.
- the rigid insert 41 allows to support the tightening torque that would be otherwise unloaded to the rubber base element 40 which would collapse.
- the locking ensures that each tubular member 20 thus provided may not be inadvertedly released, even in case of boat capsizing.
- the present invention also provides particular advantages during manufacture, which advantages are underlined below with reference to Figures 7A-7C .
- Figure 7A there is schematically illustrated a section of a rigid hull 110 of the conventional type, i.e. without any tubular member
- Figure 7B is a schematic section view of a hull 210 with a sole tubular member of the conventional type, i.e. a tubular member 220 totally surrounding the perimeter of the hull. It should be understood that both hulls 110 and 210 cannot be obtained by the same mould.
- Figure 7C illustrates a hull 10 according to the present invention. From the mould 1 for a conventional rigid hull, of the type represented in Figure 7A , it is possible to obtain a hull with partial tubular members by simply providing suitable inserts 2 within the mould. The inserts 2, fixed from outside the mould 1 by removable means (not illustrated), will be extracted from the mould 1 together with the moulded piece and subsequently removed.
- the modular mould 1 indifferently allows to obtain a boat with a conventional rigid hull or with a RIB type hull, i.e. a boat prearranged for the fixing of a tubular member 20 or any other removable system (for example, fenders) or not.
- a mould 1 will be thus obtained which is prearranged for 'normal' laminations (to obtain conventional rigid hulls), or by using the suitable inserts 2, for laminations intended to obtain housings and guide elements which are suitable to allow the mounting of the tubular members 20.
- Both hull versions for one boat can be thus offered to the customers.
- the tubular member 20 comprises an inflatable casing 27 ( Figure 6 ) made of a flexible material.
- the connection between the casing 27 and the front locking portion 21 can be for example made by gluing at suitable depressions 28 formed on the outer surface of the base element 40 or the corresponding rubber layer coated thereon, such as to make the outer surface of the tubular member 20 smooth, or however without irregularities or steps.
- the tubular member 20 is preferably inflatable or deflatable as desired and the casing 27 is preferably made with one or more separate airtight chambers.
- FIG. 8 shows the stern portion according to a possible embodiment of the present invention, in which each of the flexible casings 27 of the tubular members 20 is partitioned into airtight chambers 27a-27d which are separated by suitable partition walls 25.
- each tubular member 20 can be carried out by using a single inflating valve 62 connected to a single pipe 60 crossing the partition walls 25 of the airtight chambers 27a-27d.
- the valve 62 is arranged aft of the respective tubular member 20, in such a position as to not interfere with the hull 10, whereas along the pipe 60 there are present non-return valves 61 (one for each chamber) to pneumatically isolate each chamber from the others.
- each chamber 27a-27d is provided with a respective air valve 63.
- This inflation/deflation system allows to separately and independently inflate and deflate each of the tubular members 20 while in motion, without any need to stop.
- inner elastic tension wires 29 suitable to limit the bulk thereof when it is deflated.
- the elastic tension wires 29 are arranged with an end thereof which is fastened to each of the sliding rods 30, whereas the other end of each of the elastic tension wires 29 is fastened to a protection profile 26 fixed outside the tubular member 20.
- the protection profile 26 is preferably made of a material having a greater hardness than the material of the inflatable casing 27, for example a rubber or plastic having a greater hardness than casing 27, and can be fixed to the casing for example by gluing.
- the casing 27 in a deflated condition does not droop, thus being instead retracted by the inner elastic tension wires 29 such as to occupy the recessed housing 11 of the flank of hull 10, i.e. the same "natural" housing of the tubular member 20 when in operative conditions.
- the particular nature of the materials composing the protection profile 26 and the arrangement of the elastic tension wires 29 facilitates the retraction of the casing 27 into the recessed housing 11.
- the elastic tension wires 29 which is indicated in Figures 9A and 9B is given by way of illustration only.
- the elastic tension wires 29 can also be fixed such as to obtain a sort of three-dimensional web, and thus not being necessarily fastened at the ends thereof to the sliding rods 30 and/or the protection profile 26.
- the protection profile 26 can also have a smaller sectional size and the retraction efficiency can be essentially delegated only to the geometrical arrangement of the elastic tension wires 29.
- the inner elastic tension wires 29 can be inserted within the inflatable casing 27 in an already pre-tensioned condition.
- the retracting means of casing 27 can however be made with a different inner tensioning system, for example by means of pulleys which are connected to one another through rigid or elastic cables.
- the remaining part of the hull, particularly the bow, being no longer interested by the presence of a sole complete tubular member, can be shaped such as to ensure further safety characteristics.
- the bow portion can be shaped such as to provide a so-called "anti-sink bow”.
- a possible embodiment of the bow portion of a hull 10 according to the present invention is illustrated by way of example in the Figures 10A-10C .
- the anti-sink bow which is represented herein is made by widening the upper part of a conventional pointed bow 51 such that the front end comprises flat surfaces 50, such as shown in the bottom plan view from Figure 10A . Consequently, the deck portion 55 is also widened in order to be joined to the widened surfaces 50.
- the junction of the bow widened end to the hull flank is provided by a convex surface 53 followed by a concave surface 54.
- the latter is upwardly joined, i.e. near the deck 55, to the side surface of the projecting portions 52 until the junction of the hull to the deck. All the surfaces described herein are directly obtained from the hull mould during manufacture.
- the bow shaped in this way is called "anti-sink” not because it ensures buoyancy with the damaged boat, either leaking or flooded by the waves, rather because it prevents the bow from sinking with very rough and head sea.
- the transversal surfaces 53 and 54 ensure the hydrodynamic lift should the bow temporarily sink in the water.
- an upward thrust is generated which causes the bow to emerge faster, thereby providing a safer and more stable boat.
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Abstract
Description
- The present invention relates to a boat hull and particularly to a hull having improved safety and stability characteristics.
- The currently known boats, particularly the motorboats, can be essentially divided in two typologies, i.e. boats with a rigid structure without any tubular member and boats with a rigid structure provided with a sole tubular member entirely surrounding the perimeter thereof.
- The hulls without tubular elements are properly called "rigid" or however conventional rigid hulls, whereas the rigid hulls provided with tubular members attached along the perimeter of the boat are generally indicated as RIB (Rigid Inflatable Boat). This distinction is required because boats exist which are completely inflatable, or having only the keel, i.e. that part always immersed in the water, as the rigid structure.
- The present invention pertains to the field of the boats having a rigid hull, i.e. boats with conventional rigid hulls and boats with RIB hulls.
- Such a boat is described in
WO 02/09 24 21 A1 - These types of boats have both advantages and drawbacks, or in other words, they are more suitable for certain uses and less to others.
- For example, a conventional rigid-hull boat is ideal with a flat sea surface, or however with a calm sea, and at the same characteristics of the boat, it allows to reach a higher speed than the boats with a RIB hull. At high speeds, aerodynamic drag becomes a non-negligible contribution to the hydrodynamic drag and with a rigid hull a smaller resistant section is exposed to the air. Furthermore, it should not be overlooked that the boats with a conventional rigid hull generally have a better appearance.
- On the other hand, the boats with a RIB hull are more suitable to sail in rough sea conditions because, at the same width of the rigid hull, the inflatable tubular member surrounding the hull perimeter increase the "support base" in the water and greatly increases the stability and buoyancy of the boat. The latter characteristics are useful, regardless of the conditions of the sea, when the hull is stationary or moving at a low speed, i.e. when the hydrodynamic pressure is poor or negligible.
- However, hulls with tubular members are often preferred for those boats intended for dangerous missions, such as the fight against smuggling or clandestine immigration. As a matter of fact, in RIB boats the tubular members are inflatable and provide the boats with particular characteristics, such as greater reliability in terms of buoyancy in case of collision, greater protection against shocks and better stability under rough sea conditions. However, the boats with tubular members are bulkier than those without, and their greater section is a drawback in terms of air resistance upon forward speed increase.
- WHO 02/092421 A1 discloses a prefabricated boat having a hull according to the preamble of claim 1. The hull comprises a rigid structure and a pair of tubular members fixable to the rigid structure at the perimeter thereof. The tubular members comprise an inflatable casing made of a flexible material and are shaped and sized such as to only partially cover the hull perimeter in order to increase buoyancy but minimize frictional resistance exerted by the tubular members.
- Generally, it is an object of the present invention to provide a novel type of boat allowing to combine the advantages of the conventional rigid hulls with the advantages of the RIB hulls, i.e. a boat with improved safety and stability characteristics.
- A particular object of the present invention is to provide a novel type of boat allowing to change the overall width of the hull as desired, while maintaining the size of the rigid hull unchanged.
- Another particular object of the present invention is to provide a novel type of boat provided with a hull to be easily changed into any of the rigid hull boat typologies, as desired.
- These objects are achieved by the present invention, which relates to a boat hull according to claim 1.
- According to a possible embodiment, at least two distinct tubular members are provided which are attached to the respective flanks of the hull. Each of the tubular members has a lower length than the flank length.
- Preferably, the tubular members are assembled at the hull stern portion and have a tapered shape towards the bow.
- The tubular members are removably attached to the hull rigid structure, preferably at respective recessed housings provided in the hull rigid structure.
- Each of the tubular members comprises an inflatable casing made of flexible material and there are preferably provided means to retract the inflatable casing into the corresponding recessed housing when the tubular member is in the deflated condition.
- According to a possible embodiment, the hull rigid structure comprises one or more projecting rigid parts at the bow portion. These projecting parts are shaped such as to prevent the bow from sinking in the water under rough sea conditions.
- According to the present invention, the width of the boat can be increased while maintaining the width of the rigid hull unchanged, thereby obtaining a better buoyancy and stability performance than a rigid hull without any tubular member.
- The solution provided by the present invention thus combines the advantages of both hull typologies. The tubular members are more useful mainly aft of the boat, where most of the boat weight is charged when the bow of the hull does not touch the water. In conformity with this load distribution, the tubular member section is thus preferably tapered, i.e. wider aft and narrower fore of the boat.
- The fact of having partial tubular members arranged only fore of the boat further allows a greater freedom in selecting the shape of the remaining part of the hull, particularly fore of the boat.
- For example, the rigid fore portion, optionally provided with the above projecting rigid parts, can be shaped such as to keep the overall increase in the boat drag within acceptable values, and consequently, not prejudice the boat performance.
- A hull with partial tubular members has a number of advantages compared to one provided with a sole tubular member extending all along the flank thereof because that part of the sole tubular member normally unused is eliminated. Indeed, the working tubular part is aft of the boat, whereas the part fore of the boat increases the overall drag of the boat, both from a hydrodynamic and aerodynamic point of view, by increasing the surface exposed to the wind and waves.
- Generally, both safety and versatility of use of the boat are increased, thus providing a boat that can be easily manufactured and adapted to the various usage situations and sea conditions in the area of operation.
- Further characteristics and advantages of the present invention will be better understood from the description below, which is given by way of a non-limiting example with reference to the annexed drawings, in which:
-
Figure 1 is a perspective view of a hull portion according to a possible embodiment of the present invention; -
Figure 2 is a cross-section view showing several details of the means for fixing a tubular member to a hull; -
Figure 3 is a cross-section view of a detail fromFigure 2 ; -
Figure 4 is a partially phantom and section perspective view of a detail of the fixing means located at one end of a tubular member to a hull; -
Figure 5 is a cross-section enlarged view of the fixing means fromFigure 4 ; -
Figure 6 is a longitudinal section enlarged view of a possible embodiment of the front end portion of a tubular member; -
Figure 7A is a schematic section view of a rigid hull of the conventional type, i.e. totally devoid of any tubular member; -
Figure 7B is a schematic section view of a hull with a tubular member of the conventional type, i.e. a hull with a sole tubular member completely surrounding the perimeter of the hull; -
Figure 7C is a schematic section view of a hull according to a possible embodiment of the invention which is formed in a mould; -
Figure 8 schematically represents the inflation and deflation system of the tubular members within a hull according to the present invention; -
Figures 9A and9C are cross-section views illustrating possible embodiments of the retracting system of a deflated tubular member casing; -
Figures 9B and9D are cross-section views illustrating the tubular member fromFigure 9A and the tubular member fromFigure 9C in a deflated condition; and -
Figures 10A-10C illustrate several views of the bow portion of a hull according to a possible embodiment of the present invention. -
Figure 1 illustrates a stern portion of arigid hull 10 at which atubular member 20 is fixed to the side flank of the hull. A corresponding tubular member 20 (not shown) is fixed to the opposite flank, such as to provide a system capable of ensuring improved performance in terms of protection and lateral stability. A hull with partial tubular members is thus provided. - As can be seen in
Figure 2 , eachtubular member 20 is fixed at arecessed housing 11 provided within the rigid structure of thehull 10. - Preferably, each
tubular member 20 is removably fixed to thehull 10 through particular fixing means ensuring a strong retention. - Particularly, the fixing means comprise one or more longitudinal "sliding rods" 30, such as that represented in greater detail in the view from
Figure 3 . Each longitudinal slidingrod 30 is formed by arope 31 made of a textile material, or in a rubber material which is optionally equipped with a metal insert, which is made integral to thetubular member 20 through acoating layer 32 of a material either consistent with or identical to thetubular member 20. The bond between thecoating layer 32 and the outer surface of thetubular member 20 is preferably obtained by gluing the mutually contacting surfaces. - Each sliding
rod 30 is fitted within aguide element 12 integral with thehull 10 and provided with agroove 13 having such shape and size as to allow a sliding engagement of thesliding rod 30. - The
guide elements 12 are preferably arranged in thehull 10 in such a position as to allow a sametubular member 20 to be mounted indifferently to the right or left flanks of the hull. Similarly, thetubular members 20 are made such as to be independently mounted to the left or right flanks of thesame hull 10, with considerable advantages in terms of cost. - Further fixing means of the
tubular members 20 are described below particularly with reference toFigures 4-6 . -
Figure 4 shows the fixing of the front part of thetubular member 20, at which there is provided anend portion 21 fastened to thehull 10 by means ofscrews 22 andnuts 23 fitted within corresponding throughholes 24 drilled in thesame end portion 21. - Referring particularly to the views from
Figures 5 and 6 , thefront locking portion 21 of thetubular member 20 consists of abase element 40 made of rubber for aninsert 41 made of metal or rigid plastic material to be incorporated therein. Therigid insert 41 can be either drowned in the rubber of the base element 40 (Figure 5 ), or fitted therein and covered with a rubber layer (Figure 6 ) fixed for example by gluing. - The locking
portion 21 provided with therigid insert 41 enables the fixing to thehull 10 by means of the throughscrews 22 such that the heads of the screws do not protrude from the upper surface of the flank. Therigid insert 41 allows to support the tightening torque that would be otherwise unloaded to therubber base element 40 which would collapse. Despite eachtubular member 20 is inserted into acorresponding guide element 12 from the bow to the stern to avoid that during normal sailing the tubular member may be released, the locking ensures that eachtubular member 20 thus provided may not be inadvertedly released, even in case of boat capsizing. - Due to the easy fixing system of the
tubular members 20, a simple and quick replacement is ensured without requiring particular tools or equipment. - The present invention also provides particular advantages during manufacture, which advantages are underlined below with reference to
Figures 7A-7C . - In
Figure 7A there is schematically illustrated a section of arigid hull 110 of the conventional type, i.e. without any tubular member, whereasFigure 7B is a schematic section view of ahull 210 with a sole tubular member of the conventional type, i.e. atubular member 220 totally surrounding the perimeter of the hull. It should be understood that bothhulls -
Figure 7C illustrates ahull 10 according to the present invention. From the mould 1 for a conventional rigid hull, of the type represented inFigure 7A , it is possible to obtain a hull with partial tubular members by simply providingsuitable inserts 2 within the mould. Theinserts 2, fixed from outside the mould 1 by removable means (not illustrated), will be extracted from the mould 1 together with the moulded piece and subsequently removed. - By using or not these
inserts 2 it is possible to obtain both hull typologies from the same mould 1, i.e. a rigid hull of the traditional type (Figure 7A ) or a hull with partialtubular members 20 according to the present invention. It should be understood that the steps of design, and model- and mould-making for a family of hulls are avoided. Furthermore, it is also possible to obtain a new hull with partialtubular members 20 starting from the design (and the mould) of an already existing conventional hull. - In other words, the modular mould 1 indifferently allows to obtain a boat with a conventional rigid hull or with a RIB type hull, i.e. a boat prearranged for the fixing of a
tubular member 20 or any other removable system (for example, fenders) or not. A mould 1 will be thus obtained which is prearranged for 'normal' laminations (to obtain conventional rigid hulls), or by using thesuitable inserts 2, for laminations intended to obtain housings and guide elements which are suitable to allow the mounting of thetubular members 20. Both hull versions for one boat can be thus offered to the customers. - According to the preferred embodiment, the
tubular member 20 comprises an inflatable casing 27 (Figure 6 ) made of a flexible material. The connection between thecasing 27 and thefront locking portion 21 can be for example made by gluing atsuitable depressions 28 formed on the outer surface of thebase element 40 or the corresponding rubber layer coated thereon, such as to make the outer surface of thetubular member 20 smooth, or however without irregularities or steps. - The
tubular member 20 is preferably inflatable or deflatable as desired and thecasing 27 is preferably made with one or more separate airtight chambers. -
Figure 8 shows the stern portion according to a possible embodiment of the present invention, in which each of theflexible casings 27 of thetubular members 20 is partitioned intoairtight chambers 27a-27d which are separated bysuitable partition walls 25. - The inflation of each
tubular member 20 can be carried out by using asingle inflating valve 62 connected to asingle pipe 60 crossing thepartition walls 25 of theairtight chambers 27a-27d. Thevalve 62 is arranged aft of therespective tubular member 20, in such a position as to not interfere with thehull 10, whereas along thepipe 60 there are present non-return valves 61 (one for each chamber) to pneumatically isolate each chamber from the others. On the other hand, in order to allow the deflation of thecasings 27, eachchamber 27a-27d is provided with arespective air valve 63. - This inflation/deflation system allows to separately and independently inflate and deflate each of the
tubular members 20 while in motion, without any need to stop. - There are further advantageously provided means to retract the
inflatable casing 27 to the corresponding recessedhousing 11 when thecasing 27 is in the deflated condition. As a matter of fact, if thetubular member 20 were deflated or damaged, it would hang down the flank of the boat and it is understood that, by sailing in these conditions, the tubular member might be inadvertedly damaged. - According to a possible embodiment, such as illustrated in greater detail in
Figures 9A and 9B , in theinflatable casing 27 of thetubular member 20 there are provided innerelastic tension wires 29 suitable to limit the bulk thereof when it is deflated. - In this embodiment, the
elastic tension wires 29 are arranged with an end thereof which is fastened to each of the slidingrods 30, whereas the other end of each of theelastic tension wires 29 is fastened to aprotection profile 26 fixed outside thetubular member 20. Theprotection profile 26 is preferably made of a material having a greater hardness than the material of theinflatable casing 27, for example a rubber or plastic having a greater hardness than casing 27, and can be fixed to the casing for example by gluing. - In the inflated condition (
Figure 9A ) theelastic tension wires 29 are thus tensioned (or loaded) such that, following deflation, the inflatable casing is retracted into thehousing 11. - As illustrated in
Figure 9B , thecasing 27 in a deflated condition does not droop, thus being instead retracted by the innerelastic tension wires 29 such as to occupy the recessedhousing 11 of the flank ofhull 10, i.e. the same "natural" housing of thetubular member 20 when in operative conditions. The particular nature of the materials composing theprotection profile 26 and the arrangement of theelastic tension wires 29 facilitates the retraction of thecasing 27 into the recessedhousing 11. - The arrangement of the
elastic tension wires 29 which is indicated inFigures 9A and 9B is given by way of illustration only. For example, such as illustrated inFigures 9C and 9D , theelastic tension wires 29 can also be fixed such as to obtain a sort of three-dimensional web, and thus not being necessarily fastened at the ends thereof to the slidingrods 30 and/or theprotection profile 26. - In this case, the
protection profile 26 can also have a smaller sectional size and the retraction efficiency can be essentially delegated only to the geometrical arrangement of theelastic tension wires 29. - Whatever being the arrangement thereof, the inner
elastic tension wires 29 can be inserted within theinflatable casing 27 in an already pre-tensioned condition. - Alternatively, the retracting means of casing 27 can however be made with a different inner tensioning system, for example by means of pulleys which are connected to one another through rigid or elastic cables.
- It is thus possible to freely use the hull also without tubular members, for example after they have been removed or deflated. The latter case is also valid with a damaged tubular member.
- Due to the provision of partial tubular members according to the present invention, the remaining part of the hull, particularly the bow, being no longer interested by the presence of a sole complete tubular member, can be shaped such as to ensure further safety characteristics. For example, the bow portion can be shaped such as to provide a so-called "anti-sink bow".
- A possible embodiment of the bow portion of a
hull 10 according to the present invention is illustrated by way of example in theFigures 10A-10C . - The anti-sink bow which is represented herein is made by widening the upper part of a conventional
pointed bow 51 such that the front end comprisesflat surfaces 50, such as shown in the bottom plan view fromFigure 10A . Consequently, thedeck portion 55 is also widened in order to be joined to the widened surfaces 50. - From the flattened front ends 50 there develop two corresponding projecting
portions 52 provided with hydrodynamically liftingsurfaces Figures 10B and 10C . - From a structural point of view, the junction of the bow widened end to the hull flank is provided by a
convex surface 53 followed by aconcave surface 54. The latter is upwardly joined, i.e. near thedeck 55, to the side surface of the projectingportions 52 until the junction of the hull to the deck. All the surfaces described herein are directly obtained from the hull mould during manufacture. - The bow shaped in this way is called "anti-sink" not because it ensures buoyancy with the damaged boat, either leaking or flooded by the waves, rather because it prevents the bow from sinking with very rough and head sea.
- In other words, the
transversal surfaces
Claims (11)
- A boat hull comprising at least one rigid structure (10) and one or more tubular members (20) fixable to said rigid structure (10) at the perimeter thereof, wherein said one or more tubular members (20) are shaped and sized such as to only partially cover the hull perimeter and wherein each of said tubular members (20) comprises an inflatable casing (27) made of a flexible material, characterized in that said each inflatable casing (27) comprises more than one separate airtight chambers (27a-27d), and one single inflation duct which (60) is provided for said separate airtight chambers (27a-27d) and wherein each of said separate airtight chambers (27a-27d) comprises at least one deflating valve (63).
- The hull according to claim 1, wherein a single inflating valve (62) is provided on said single inflation duct (60).
- The hull according to claim 1, wherein a non-return valve (61) is provided for each of said chambers (27a-27d) along the single inflation duct (60).
- The hull according to claim 1, wherein at least two distinct tubular members (20) fixed to the respective flanks are provided, each of said tubular members having a shorter length than said flanks.
- The hull according to claim 1, wherein said tubular members (20) are mounted at the stern portion.
- The hull according to claim 1, wherein said tubular members (20) are tapered towards the bow.
- The hull according to claim 1, wherein each of said tubular members (20) is fixed at a recessed housing (11) which is provided in said rigid structure (10).
- The hull according to any of the preceding claims, wherein means (29) are provided to retract said inflatable casing into the corresponding recessed housing (11) when said casing (27) is in a deflated condition.
- The hull according to claim 1, wherein means (30) are provided to removably fix said tubular members (20) to said rigid structure (10).
- The hull according to claim 9, wherein said means (30) for removably fixing comprise one or more sliding rods (30) arranged on the outer surface of each of said tubular members (20).
- The hull according to claim 1, wherein said rigid structure (10) comprises one or more hydrodynamically lifting surfaces (53, 54) at the bow portion (51).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI20031731 | 2003-09-10 | ||
IT001731A ITMI20031731A1 (en) | 2003-09-10 | 2003-09-10 | HULL FOR BOATS. |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1514794A2 EP1514794A2 (en) | 2005-03-16 |
EP1514794A3 EP1514794A3 (en) | 2005-04-20 |
EP1514794B1 true EP1514794B1 (en) | 2008-04-23 |
Family
ID=34131219
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04021186A Active EP1514794B1 (en) | 2003-09-10 | 2004-09-07 | Boat hull |
Country Status (6)
Country | Link |
---|---|
US (1) | US20050051075A1 (en) |
EP (1) | EP1514794B1 (en) |
CN (1) | CN1605544A (en) |
AT (1) | ATE393085T1 (en) |
DE (1) | DE602004013237T2 (en) |
IT (1) | ITMI20031731A1 (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE527734C2 (en) * | 2004-10-08 | 2006-05-23 | Wings Ab | Inflatable |
FR2896227B1 (en) * | 2006-01-13 | 2008-03-28 | Jean Luc Vanoise | DEVICE FOR PROTECTING A BOAT SHELL |
US7971550B2 (en) * | 2008-05-30 | 2011-07-05 | Hansen John F | Rigid tube buoyancy assembly for boats |
ITRM20110356A1 (en) * | 2011-07-07 | 2013-01-08 | Icarus Internat S R L | "INDEPENDENT MODULAR NAVIGATION CONTROL SYSTEM" |
WO2013173886A2 (en) * | 2012-05-25 | 2013-11-28 | Nikolic Cvjetko | Hull protector from underwater obstacles |
ITUB20155583A1 (en) * | 2015-11-13 | 2017-05-13 | Carmelo Marchetta | PLANANT HULL STABILIZED WITH AIRCRAFT REPLACEMENT (NAIL HULL) |
IT201700064166A1 (en) * | 2017-06-09 | 2018-12-09 | Adragna Yacht Design Studio Pte Ltd | HULL FOR BOAT, PROCEDURE TO REALIZE IT AND RELATIVE BOAT |
CN110304197B (en) * | 2019-06-21 | 2021-03-02 | 中船黄埔文冲船舶有限公司 | Deck gunwale structure and linear lofting method thereof |
CN110466682B (en) * | 2019-08-22 | 2021-05-11 | 中船黄埔文冲船舶有限公司 | Manufacturing method of arc transition deck |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2544599A (en) * | 1947-06-28 | 1951-03-06 | Keelen Festus Aeneas | Rowboat safety pontoon |
US3566425A (en) * | 1969-09-10 | 1971-03-02 | Bonair Boats Inc | Floorboard apparatus for inflatable boats or the like |
FR2292926A1 (en) * | 1974-11-29 | 1976-06-25 | Lair Gilbert | Stiffening reinforcement for inflatable structure - has flexible metal sheets interposed between inner and outer walls |
US4416639A (en) * | 1981-06-22 | 1983-11-22 | Gillmer Thomas C | Manageable safety dinghy |
GB8601401D0 (en) * | 1986-01-21 | 1986-02-26 | Task Force Boats Ltd | Rigid inflatable boat |
US4962718A (en) * | 1988-04-27 | 1990-10-16 | Westfoil International | Hydrofoil propulsion system |
US4938162A (en) * | 1988-09-30 | 1990-07-03 | Hanlon Frederick V | Inflatable power catamaran |
US5617810A (en) * | 1995-06-07 | 1997-04-08 | Sauerwein; William D. | Compact semi-collapsible watercraft |
CA2354229A1 (en) * | 2000-07-28 | 2002-01-28 | Donald R. Redman | Amphibious vehicle having an inflatable pontoon |
US6419532B1 (en) * | 2000-09-01 | 2002-07-16 | Edward Bradish, Jr. | Jet-propelled watercraft |
US20020056409A1 (en) * | 2000-11-14 | 2002-05-16 | Murphree Terry B. | Folding rigid inflatable boat system and method |
US6470818B1 (en) * | 2001-04-10 | 2002-10-29 | Float Rail, Inc. | Automatic inflating watercraft flotation device |
KR200242444Y1 (en) * | 2001-05-17 | 2001-10-15 | 홍광선 | Fabricated a inflatable boat |
US6869323B2 (en) * | 2002-08-08 | 2005-03-22 | Larry Norman | Pedal powered watercraft and equipment |
-
2003
- 2003-09-10 IT IT001731A patent/ITMI20031731A1/en unknown
-
2004
- 2004-09-07 EP EP04021186A patent/EP1514794B1/en active Active
- 2004-09-07 AT AT04021186T patent/ATE393085T1/en not_active IP Right Cessation
- 2004-09-07 DE DE602004013237T patent/DE602004013237T2/en active Active
- 2004-09-09 US US10/936,710 patent/US20050051075A1/en not_active Abandoned
- 2004-09-10 CN CNA2004100899201A patent/CN1605544A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
ITMI20031731A1 (en) | 2005-03-11 |
CN1605544A (en) | 2005-04-13 |
ATE393085T1 (en) | 2008-05-15 |
US20050051075A1 (en) | 2005-03-10 |
EP1514794A3 (en) | 2005-04-20 |
DE602004013237T2 (en) | 2009-05-20 |
DE602004013237D1 (en) | 2008-06-05 |
EP1514794A2 (en) | 2005-03-16 |
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