CA2498153A1 - Semirigid boat for use as a service watercraft - Google Patents
Semirigid boat for use as a service watercraft Download PDFInfo
- Publication number
- CA2498153A1 CA2498153A1 CA002498153A CA2498153A CA2498153A1 CA 2498153 A1 CA2498153 A1 CA 2498153A1 CA 002498153 A CA002498153 A CA 002498153A CA 2498153 A CA2498153 A CA 2498153A CA 2498153 A1 CA2498153 A1 CA 2498153A1
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- Canada
- Prior art keywords
- boat
- semirigid
- floating
- elements
- deck
- 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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Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B34/00—Vessels specially adapted for water sports or leisure; Body-supporting devices specially adapted for water sports or leisure
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Laminated Bodies (AREA)
- Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
- Macromolecular Compounds Obtained By Forming Nitrogen-Containing Linkages In General (AREA)
- Details Of Rigid Or Semi-Rigid Containers (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
- Table Devices Or Equipment (AREA)
- Navigation (AREA)
Abstract
A semirigid boat, specifically designed as a service waterchat for short and middle range navigation, for disembarking and embarking tourists and passengers from cruise and pleasure vessels, comprises a bottom, a deck and floating means which are mutually operatively associated, wherein the floating means comprises one or more synthetic material floating elements having a peculiar shape.
Description
SE'MIRIGID BOAT FOR USE AS A SERVICE WATRRCRAFT
BACKGROUND OF TSEE INVENTION
The present invention relates to a seznixigid boat, which has been specifically designed for operation as a serv~.ee watexcxaft.
More specifically, the semi.rigid boat according to 'the present invention can be used as ~a service watercraft for short and middle range "
navigation, and for disembarking and embarking tourists and passengers onto/from cruise and pleasure vessels.
As is known, in recent years, multiple requirements both of pleasure boaters and professional users, have favored a broad diffusion and development of semirigid boats, substantially comprising a rigid bottom and dunnage, peximetrically encompassed by float~.z~g pneumatic tubular e~.eznez~ts.
xhe above znenta.oned requirements were particularly related to the shape stabila.ty, center of mass position which, in these boats is advantageously arranged at a lower level, high floating characterist~.c5, a larger' payload, tb.e size being the same w.zth respect to those of other boats, a high ~.ava.gation comfort, in addition to a greatly facilitated hauling capability,~without damages.
Commercially available semirigid boats, while they partially meet the above mentioned requirements, are however affected by some disadvantages or drawbacks.
In fact, the pneumatic tubular elements can be damaged both during the navigation and in hauling operations, and as the boat ~is hauled to a dry condition.
Zn particular, possible holes of a comparatively large size can greatly reduce the floating capability! of the boat, up to prevent the latter from stably floating and, accordingly, could negatively affect the navigation quality and safety, and, in serious events, to cause the boat to sink.
~oxeovex, also small holes cause a lot of remarkable drawbacks, both due to the requirement of frequently recovering the proper pressure in the tubular elements, and for the time necessary For the recovering or repairing operations.
Moreover, the above mentioned pneumatic tubular elements are negatively affected by the atmospheric agents, thereby they can prematurely age, with respect to conventional types of boats.
BACKGROUND OF TSEE INVENTION
The present invention relates to a seznixigid boat, which has been specifically designed for operation as a serv~.ee watexcxaft.
More specifically, the semi.rigid boat according to 'the present invention can be used as ~a service watercraft for short and middle range "
navigation, and for disembarking and embarking tourists and passengers onto/from cruise and pleasure vessels.
As is known, in recent years, multiple requirements both of pleasure boaters and professional users, have favored a broad diffusion and development of semirigid boats, substantially comprising a rigid bottom and dunnage, peximetrically encompassed by float~.z~g pneumatic tubular e~.eznez~ts.
xhe above znenta.oned requirements were particularly related to the shape stabila.ty, center of mass position which, in these boats is advantageously arranged at a lower level, high floating characterist~.c5, a larger' payload, tb.e size being the same w.zth respect to those of other boats, a high ~.ava.gation comfort, in addition to a greatly facilitated hauling capability,~without damages.
Commercially available semirigid boats, while they partially meet the above mentioned requirements, are however affected by some disadvantages or drawbacks.
In fact, the pneumatic tubular elements can be damaged both during the navigation and in hauling operations, and as the boat ~is hauled to a dry condition.
Zn particular, possible holes of a comparatively large size can greatly reduce the floating capability! of the boat, up to prevent the latter from stably floating and, accordingly, could negatively affect the navigation quality and safety, and, in serious events, to cause the boat to sink.
~oxeovex, also small holes cause a lot of remarkable drawbacks, both due to the requirement of frequently recovering the proper pressure in the tubular elements, and for the time necessary For the recovering or repairing operations.
Moreover, the above mentioned pneumatic tubular elements are negatively affected by the atmospheric agents, thereby they can prematurely age, with respect to conventional types of boats.
Moreover, their Inner 'width is smaller, the size being the same, than that of a rigid boat having the same outer dimensions.
The height of the sidewalls, and then of the free edge thereof, is in fact related to the diameter of the pneumatic tubular elements and, consequently, iS necessarily limited.
This drawback ~ invplves, as a further disadvantage, a low level walking surface, with respect to the water surface.
SU1~ARY OF TgE xNVENTION
Accordingly,'. the aim of the present invention is to pxvvide such a semirigid boat, specifically designed fox use as a service watercraft, adapted to overcome the above mentioned drawbacks affecting the prior art.
Within the scope of the above mentioned aim, a main object of the present invention is to provide such a semirigid boat, specifically designed as a service watercra~t for a short and ~mzddle range navigation, for disembarking and embarking tourists and passengers onto/from cruise and pleasure vessels, which has a novel construction which is very reliable in the time.
The height of the sidewalls, and then of the free edge thereof, is in fact related to the diameter of the pneumatic tubular elements and, consequently, iS necessarily limited.
This drawback ~ invplves, as a further disadvantage, a low level walking surface, with respect to the water surface.
SU1~ARY OF TgE xNVENTION
Accordingly,'. the aim of the present invention is to pxvvide such a semirigid boat, specifically designed fox use as a service watercraft, adapted to overcome the above mentioned drawbacks affecting the prior art.
Within the scope of the above mentioned aim, a main object of the present invention is to provide such a semirigid boat, specifically designed as a service watercra~t for a short and ~mzddle range navigation, for disembarking and embarking tourists and passengers onto/from cruise and pleasure vessels, which has a novel construction which is very reliable in the time.
Yet another object of the present invention is to provide such a semixigid boat having enhanced payload capabilities.
Yet another object of the present invention is to provide such a semirigad boat which provides a vexy high navigation comfort.
According to one aspect of the present invention, the above mentioned aim and objects, as well as yet other objects, which will become more apparent hereinafter, are achieved by a~ semirigid boat, for a service watercraft use, comprising a boat bottom, a boat deck and floating means mutually associated with one another, characterized in that said floating means compxise one or more synthetic material floating elements, having a peculiar shape.
BRIEF DESCRIQTION OF T8E DRA~PINGS
Furthex characteristics and advantages of the present invention will become more apparent hereinafter from the following detailed disclosure of a preferred, though not exclusive, embodiment of the invention, which is illustrated, by way of an indicative, but not limitative, example in the accompanying drawings, where:
Figure 1 is a partially cross-sectioned front view illustrating the subjecw construction in an operating step preceding the assembling of the semirigid boat;
Figuxe 2 is a side view of some floating elements included in the boat according to the present invention;
Figure 3 is a top view of the same floating elements:
Figure 4 is a partially enlarged side view illustrating the Connection of two of said floating elements;
Figure 5 his a partial top plan view illustrating the connection shown in figure 4:
Figure 6 is a partially cross-sectioned front view of the semirigid boat;
Figure 7 is a cross-sectioned front view of a floating element included in the subject semixlgid boat;
Figure 8 is a front view of a tie-rod element used in the semirigid boat according to the invention;
Figure 9 is a cross-sectioned front view of the element shown in figure 7, to which the tie~rod shown in Figure 8 has been applied;
Figure 10 is a partially exploded side view of the semirigid boat; w Figure 11 is a top plan view of an element included in the semirigid boat according to the invention;
Figure 12 is a cross-sectioned view of the boat, with an inner tubular element molded in a mold and connected to the boat bottom according three configurations;
Figure 13 is a partially cross-sectioned view of the boat with the tubular element welded to the boat bottom at two points, with a polyurethane joint;
Figure 14 is an enlarged view of the detail of figure 13;
Figure 15 is a partially cross-sectioned view of the boat with the tubular element welded to the boat bottom at a point, with a triple polyurethane joint covering element;
Figure 16 is an enlarged view of the detaa,l shown in figure 15;
Figure 7.7 is a partially cross-sectioned view of the boat with ,the tubular element structurally welded in a "A"-shape profile to the boat bottom;
and Figure ~.8 is an enlarged ~riew of the detail of figure 17. w DESCRTPTION OF TFiE PREE'ERRED E~ODIMENTS
Wa.th reference to the number references of the ..
above mentioned figures, the semir~.gid boat, according to the present invention, which has been generally i,nd~.cated by the reference number l, comprises a rigid boat bottom 2; preferably made by using composite fibrous materials with a thermosetting polymeric matrix.
.A boat deck 3, overlaying the boat bottom 2, comprises peri.metricalJ.y a plurality of ridges ox profiles ~ having avtrapezoidal cross-secti.oz~.
The trapezoidal profiles 9 are preferably made in the boat deck molding operation, and on sa~.d pxo~iles of ridges 3 are provided a hous~,ng for semirigid floating elements 5.
Each of the above mentioned elements comprises a closed cell polyurethane foam core, providing a great shape stability.
The semi rigid .f.loating e~,e~ment S, in.
particular, can be made, for example, by extrusion or mold injection starting from closed cell polyurethane foam.
This material, even after periods of months, does not absorb water and haswa very high wear and atmospheric agent resistance.
The used foam material is advantageously provided with such mechanical characteristics as to have a resilient performance, similar to that of air enclosed in conventional floating tubular elements, with a laxger cushioning effect and a larger strain resistance.
More specifically, the tubular element is preferably fully made of closed cell foamed polyethylene, coated by polyurethane, thereby assuring anti-sinking capabilities even in a case o~ bxeakages or cuts, as can occux because of impacts against other boats or other articles having rough surfaces, ox cutting parts.
The above mentioned tubular elements is provided With a lot of advantageous characteristics.
In fact, the high elasticity of the foamed polyethylene provides a high energy or power absorption, and a small xeaction force, which would be essential for preventing the risk of possible damages.
To provide a good binding of the polyurethane coating and foamed polyethylene, a specifically designed type o~ foam material has been used, including a polyethylene component having very good binding characteristics for binding it to polyurethane polymers.
More specifically, foamed polyethylene is coated by a high thickness polyurethane elastomeric layer, allowing a very gaod wear and breaking resistance, thereby assuring a long duration even in heavy use condition.
Such a material is conventionally used for making conveyor belts in granite quarries and it has a very high wear resistance.
From a lot '~of tests, it has been found that this material is adapted to resist against to 80g compressions, without any damages and with a substantially izaz~ediate recovery of its original size.
The shape ox configuration of the floating elements S provides an approximatively "H"-shape cross-section, which, accordingly, is different from the conventional cross-section of prior circular cross-section pneumatic floating elements, since the used polyurethane foam has a self-supporting or peculiar shape, which is defined in designing the pneumatic floating elements.
Thus, it is possible to overcome the size limits which, in pxio.r sez~~,ra.gid boats, limit the inner width and the height of the free edge thereof, Moreover, the polyurethane based coating of each element 5 allows to obtain a perfect proofing and wear resistance, against both atmospheric agents and accidental tearings or cuts.
Each floating element is patterned with a vertical extension variable cross-section which comprises, for a disassemblable embodiment, at least two recesses, i.e. a bottom recess 6 and atop recess 7 having a trapezoidal cross-section.
Said recesses allow to provide a connection with one of the above mentioned profiles 4 provided on the boat deck and a profile 8 applied on a top element 9 having the same peri,zttetrical plan as that of the deck 3.
The mentioned top element 9, which is preferably made by a molding method, comprises a plurality of profiles 8 which corrESpond to the plurality of profiles 4 provided on the boat deck 3.
Moreover, said top e~.ement 9 is anchored to the boat deck 3 by adjustable tie-rod elements 10, designed for pressing and holding in a set position the mentioned semirigid floating element 5.
lx The above mentioned tie--rod elements 10 are preferably made of a rigid round material. or of a stainless steel flexible cable, and axe advantageously provided with threaded end portions to allow simple clamping and adjusting operations to be quickly performed.
Mare specifically, the tie-rod elements 10 connect each pxofile 9: of the boat deck 3 with a corresponding profile 8 of the top element 9, by passing through a floating element 5 which is preliminarily perforated inside the two recesses 6 and 7. 1 The holes 11 are advantageously coated by a polyurethane layer.
The above mentioned tie-rod elements 14 can be adjusted by a series of circular cross-section openings i2, including a respective plug elements, and formed on the top element 9.
Said tie-rod eleznenas are moreover the single cor~nectz.or~ to the xigid part of the boat , 1.
Thus, the above mentioned top element 9 is prevented from moving on a horizontal plane only due to the correspondi,z~g rigidity of the broads~,des .
Such az~ approach would be particularly advantageous since it would allow to reduce the stresses on the above znex~tioned top element 9 which, accordingly, could hare a construction optimized with xespect to its weight.
~'he side cor~rzection of the semi rigid floating elements 5, each connected by a ti,e-rod element 10 to a profile 9 and a profile 8 as respectively provided on the boat deck 3 and top element 9, is carried out substantially by a plug~in operation.
This latter is preferably performed~by a. strip 13 made of a material like that of the outer coating of each float eleme~rt 5.
The above mentioned strip 13, in particular, is glued, at the rear end portion of the floating element 5 nearer to the bow, by causing the exceeding portion to project, thereby providing a resilient lip to be overlapped, during the assembling operata.on, onto the corresponding end poxtion of the floating element 5 neaxer to the stern.
'thus, it should be advantageous to provide each floating element 5, at are end portion thexeof, with a narrowed portion 19 adapted to properly receive the hull, i,n order to reduce the resistance to forward movement and provide a more aesthetic aspect.
Preferably, the above -zoez~t,ioned strip 13 or projecting lip is made, as the coating is assembled, by uszz~g an extension-mold of the floating element 5, to provide finishings and better mechanical.
characteristics with respect to the side tightness of said floating elements 5.
Under static conditions, 'the tie-rods 10 provide a position limit, so as to vertically press each semirigid floating element 5 during the navigation.
zn a case of side stxesses, the top element 9 and floating element 5' assembly will resiliently react, since with the overall side displacement a compression of the floating eJ.ement 5 is associated.
The elasticity of the float~.ng elements 5 and the specifically designed connection between the boat deck 3 and tap element 9 provide a boat which is generally ,resilient, having a performance to the navigation stresses arid accidental impacts like that of conventional pneumatic floating elements.
The solution shown in the preceding figures, with separated cross-sections, allows to replace the tubular element in a very quick and easy manner, for example if it would be used in heavy conditions, such as in off-shore oil platforms. w According to the invention, a further embodiment provides to use a full tubular element, molded in a mold, as it is schematically shown in figure 12, and connected to the boat bottom in at least three patterns as respectively shown in figures 23-18.
More specifically, figures~l3 and 14 show a tubulax element 5 welded at two points or spots to the boat bottam 2 with a polyurethane joint.
F~gures 15 and 16 show a tubular element 5 welded at a spot to the boat bottom 2 by a triple joint covering element 55 made of polyurethane ox other high strength materials.
Figures 17 and 18 show a tubular element 5 structurally welded zn a "A"-shape profile, generally indicated by the xefexence number 65, to the boat bottom 2:
From the above disclosure it should be apparent that the semirigid boat, . specifically designed as a sexvice watexcraft for short and middle range navigation, for disembarking and embarking tourists and passengers fram/onto cruise and pleasuxe vessels, provides a lot of important advantages.
IS
Tn fact, the boat according to the invention represents an "unsinkable" boat, since it cannot be practically perforated.
A further advantage consists of the enhancement of the inner width, the projected width being the same, thereby increasing the passenger comfort and the payload volume, as it is clearly shown in figure 12.
Furthermore, the semirigid boat according to the present invention provides an increase of the free edge without substantially raising its center of mass, which allows to bring to a higher level the walking deck, thereby allowing the possibility of forming a static self-empting well, as is clearly shown, in particular, in figure 12.
zn practicing the invention, the used materials, as well as the contingent size and shapes can be any, depending on requirements and the status of the art.
Yet another object of the present invention is to provide such a semirigad boat which provides a vexy high navigation comfort.
According to one aspect of the present invention, the above mentioned aim and objects, as well as yet other objects, which will become more apparent hereinafter, are achieved by a~ semirigid boat, for a service watercraft use, comprising a boat bottom, a boat deck and floating means mutually associated with one another, characterized in that said floating means compxise one or more synthetic material floating elements, having a peculiar shape.
BRIEF DESCRIQTION OF T8E DRA~PINGS
Furthex characteristics and advantages of the present invention will become more apparent hereinafter from the following detailed disclosure of a preferred, though not exclusive, embodiment of the invention, which is illustrated, by way of an indicative, but not limitative, example in the accompanying drawings, where:
Figure 1 is a partially cross-sectioned front view illustrating the subjecw construction in an operating step preceding the assembling of the semirigid boat;
Figuxe 2 is a side view of some floating elements included in the boat according to the present invention;
Figure 3 is a top view of the same floating elements:
Figure 4 is a partially enlarged side view illustrating the Connection of two of said floating elements;
Figure 5 his a partial top plan view illustrating the connection shown in figure 4:
Figure 6 is a partially cross-sectioned front view of the semirigid boat;
Figure 7 is a cross-sectioned front view of a floating element included in the subject semixlgid boat;
Figure 8 is a front view of a tie-rod element used in the semirigid boat according to the invention;
Figure 9 is a cross-sectioned front view of the element shown in figure 7, to which the tie~rod shown in Figure 8 has been applied;
Figure 10 is a partially exploded side view of the semirigid boat; w Figure 11 is a top plan view of an element included in the semirigid boat according to the invention;
Figure 12 is a cross-sectioned view of the boat, with an inner tubular element molded in a mold and connected to the boat bottom according three configurations;
Figure 13 is a partially cross-sectioned view of the boat with the tubular element welded to the boat bottom at two points, with a polyurethane joint;
Figure 14 is an enlarged view of the detail of figure 13;
Figure 15 is a partially cross-sectioned view of the boat with the tubular element welded to the boat bottom at a point, with a triple polyurethane joint covering element;
Figure 16 is an enlarged view of the detaa,l shown in figure 15;
Figure 7.7 is a partially cross-sectioned view of the boat with ,the tubular element structurally welded in a "A"-shape profile to the boat bottom;
and Figure ~.8 is an enlarged ~riew of the detail of figure 17. w DESCRTPTION OF TFiE PREE'ERRED E~ODIMENTS
Wa.th reference to the number references of the ..
above mentioned figures, the semir~.gid boat, according to the present invention, which has been generally i,nd~.cated by the reference number l, comprises a rigid boat bottom 2; preferably made by using composite fibrous materials with a thermosetting polymeric matrix.
.A boat deck 3, overlaying the boat bottom 2, comprises peri.metricalJ.y a plurality of ridges ox profiles ~ having avtrapezoidal cross-secti.oz~.
The trapezoidal profiles 9 are preferably made in the boat deck molding operation, and on sa~.d pxo~iles of ridges 3 are provided a hous~,ng for semirigid floating elements 5.
Each of the above mentioned elements comprises a closed cell polyurethane foam core, providing a great shape stability.
The semi rigid .f.loating e~,e~ment S, in.
particular, can be made, for example, by extrusion or mold injection starting from closed cell polyurethane foam.
This material, even after periods of months, does not absorb water and haswa very high wear and atmospheric agent resistance.
The used foam material is advantageously provided with such mechanical characteristics as to have a resilient performance, similar to that of air enclosed in conventional floating tubular elements, with a laxger cushioning effect and a larger strain resistance.
More specifically, the tubular element is preferably fully made of closed cell foamed polyethylene, coated by polyurethane, thereby assuring anti-sinking capabilities even in a case o~ bxeakages or cuts, as can occux because of impacts against other boats or other articles having rough surfaces, ox cutting parts.
The above mentioned tubular elements is provided With a lot of advantageous characteristics.
In fact, the high elasticity of the foamed polyethylene provides a high energy or power absorption, and a small xeaction force, which would be essential for preventing the risk of possible damages.
To provide a good binding of the polyurethane coating and foamed polyethylene, a specifically designed type o~ foam material has been used, including a polyethylene component having very good binding characteristics for binding it to polyurethane polymers.
More specifically, foamed polyethylene is coated by a high thickness polyurethane elastomeric layer, allowing a very gaod wear and breaking resistance, thereby assuring a long duration even in heavy use condition.
Such a material is conventionally used for making conveyor belts in granite quarries and it has a very high wear resistance.
From a lot '~of tests, it has been found that this material is adapted to resist against to 80g compressions, without any damages and with a substantially izaz~ediate recovery of its original size.
The shape ox configuration of the floating elements S provides an approximatively "H"-shape cross-section, which, accordingly, is different from the conventional cross-section of prior circular cross-section pneumatic floating elements, since the used polyurethane foam has a self-supporting or peculiar shape, which is defined in designing the pneumatic floating elements.
Thus, it is possible to overcome the size limits which, in pxio.r sez~~,ra.gid boats, limit the inner width and the height of the free edge thereof, Moreover, the polyurethane based coating of each element 5 allows to obtain a perfect proofing and wear resistance, against both atmospheric agents and accidental tearings or cuts.
Each floating element is patterned with a vertical extension variable cross-section which comprises, for a disassemblable embodiment, at least two recesses, i.e. a bottom recess 6 and atop recess 7 having a trapezoidal cross-section.
Said recesses allow to provide a connection with one of the above mentioned profiles 4 provided on the boat deck and a profile 8 applied on a top element 9 having the same peri,zttetrical plan as that of the deck 3.
The mentioned top element 9, which is preferably made by a molding method, comprises a plurality of profiles 8 which corrESpond to the plurality of profiles 4 provided on the boat deck 3.
Moreover, said top e~.ement 9 is anchored to the boat deck 3 by adjustable tie-rod elements 10, designed for pressing and holding in a set position the mentioned semirigid floating element 5.
lx The above mentioned tie--rod elements 10 are preferably made of a rigid round material. or of a stainless steel flexible cable, and axe advantageously provided with threaded end portions to allow simple clamping and adjusting operations to be quickly performed.
Mare specifically, the tie-rod elements 10 connect each pxofile 9: of the boat deck 3 with a corresponding profile 8 of the top element 9, by passing through a floating element 5 which is preliminarily perforated inside the two recesses 6 and 7. 1 The holes 11 are advantageously coated by a polyurethane layer.
The above mentioned tie-rod elements 14 can be adjusted by a series of circular cross-section openings i2, including a respective plug elements, and formed on the top element 9.
Said tie-rod eleznenas are moreover the single cor~nectz.or~ to the xigid part of the boat , 1.
Thus, the above mentioned top element 9 is prevented from moving on a horizontal plane only due to the correspondi,z~g rigidity of the broads~,des .
Such az~ approach would be particularly advantageous since it would allow to reduce the stresses on the above znex~tioned top element 9 which, accordingly, could hare a construction optimized with xespect to its weight.
~'he side cor~rzection of the semi rigid floating elements 5, each connected by a ti,e-rod element 10 to a profile 9 and a profile 8 as respectively provided on the boat deck 3 and top element 9, is carried out substantially by a plug~in operation.
This latter is preferably performed~by a. strip 13 made of a material like that of the outer coating of each float eleme~rt 5.
The above mentioned strip 13, in particular, is glued, at the rear end portion of the floating element 5 nearer to the bow, by causing the exceeding portion to project, thereby providing a resilient lip to be overlapped, during the assembling operata.on, onto the corresponding end poxtion of the floating element 5 neaxer to the stern.
'thus, it should be advantageous to provide each floating element 5, at are end portion thexeof, with a narrowed portion 19 adapted to properly receive the hull, i,n order to reduce the resistance to forward movement and provide a more aesthetic aspect.
Preferably, the above -zoez~t,ioned strip 13 or projecting lip is made, as the coating is assembled, by uszz~g an extension-mold of the floating element 5, to provide finishings and better mechanical.
characteristics with respect to the side tightness of said floating elements 5.
Under static conditions, 'the tie-rods 10 provide a position limit, so as to vertically press each semirigid floating element 5 during the navigation.
zn a case of side stxesses, the top element 9 and floating element 5' assembly will resiliently react, since with the overall side displacement a compression of the floating eJ.ement 5 is associated.
The elasticity of the float~.ng elements 5 and the specifically designed connection between the boat deck 3 and tap element 9 provide a boat which is generally ,resilient, having a performance to the navigation stresses arid accidental impacts like that of conventional pneumatic floating elements.
The solution shown in the preceding figures, with separated cross-sections, allows to replace the tubular element in a very quick and easy manner, for example if it would be used in heavy conditions, such as in off-shore oil platforms. w According to the invention, a further embodiment provides to use a full tubular element, molded in a mold, as it is schematically shown in figure 12, and connected to the boat bottom in at least three patterns as respectively shown in figures 23-18.
More specifically, figures~l3 and 14 show a tubulax element 5 welded at two points or spots to the boat bottam 2 with a polyurethane joint.
F~gures 15 and 16 show a tubular element 5 welded at a spot to the boat bottom 2 by a triple joint covering element 55 made of polyurethane ox other high strength materials.
Figures 17 and 18 show a tubular element 5 structurally welded zn a "A"-shape profile, generally indicated by the xefexence number 65, to the boat bottom 2:
From the above disclosure it should be apparent that the semirigid boat, . specifically designed as a sexvice watexcraft for short and middle range navigation, for disembarking and embarking tourists and passengers fram/onto cruise and pleasuxe vessels, provides a lot of important advantages.
IS
Tn fact, the boat according to the invention represents an "unsinkable" boat, since it cannot be practically perforated.
A further advantage consists of the enhancement of the inner width, the projected width being the same, thereby increasing the passenger comfort and the payload volume, as it is clearly shown in figure 12.
Furthermore, the semirigid boat according to the present invention provides an increase of the free edge without substantially raising its center of mass, which allows to bring to a higher level the walking deck, thereby allowing the possibility of forming a static self-empting well, as is clearly shown, in particular, in figure 12.
zn practicing the invention, the used materials, as well as the contingent size and shapes can be any, depending on requirements and the status of the art.
Claims (8)
1. A semirigid boat, designed for operating as a service watercraft, comprising a boat bottom, a boat deck and floating means mutually associated with one another, characterized in that said floating means comprise one or more floating elements made of a synthetic material and having a discrete peculiar shape.
2. A semirigid boat according to claim 1, characterized in that each said floating element comprises one or more pairs of trapezoidal recesses, respectively a bottom recess and a top recess, to which bottom recess corresponding a top recess, said recesses communicating through a hole.
3. A semirigid boat according to claim 1, characterised in that said floating elements axe made by extruding or mold infecting profile elements of a foamed polyurethane material and by coating said profile elements with a mold-formed polyurethane material.
4. A semirigid boat according to claim 1, characterized in that said floating elements are coupled, at a bottom thereof, to said deck and, at a top thereof, to a top element having a perimetrical plan analogous to that of said deck.
5. A semirigid boat according to claim 1, characterized in that said floating elements are coupled to said deck and top element by plugging in said bottom recesses into a corresponding plurality of profile elements provided on said deck, and said top recesses onto a corresponding plurality of profile elements provided on said top element, each said profile element of said boat bottom being mechanically coupled with a corresponding profile element of the top element by a tie-rod passing through said hole.
6. A semirigid boat according to claim 4, characterized in that said top element comprises, near each said profile element, an opening closed by a plug.
7. A semirigid boat according to claim 1, characterized in that each said floating element comprises at an astern position, a strip made of the same outer coating material and, toward a bow of sand boat a corresponding narrowed portion to provide a plug-in and side connection thereof.
8. A semirigid boat according to claim 7, characterized in that said strip is directly made as said outer coating is foamed by using an extended mold of each floating element.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT000341A ITMI20040341A1 (en) | 2004-02-26 | 2004-02-26 | SEMI-RIGID BOAT PARTICULARLY DESIGNED AS A SERVICE VESSEL |
| ITMI2004A000341 | 2004-02-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2498153A1 true CA2498153A1 (en) | 2005-08-26 |
Family
ID=34746707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002498153A Abandoned CA2498153A1 (en) | 2004-02-26 | 2005-02-24 | Semirigid boat for use as a service watercraft |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US20050188909A1 (en) |
| EP (1) | EP1568598B1 (en) |
| AT (1) | ATE348034T1 (en) |
| CA (1) | CA2498153A1 (en) |
| DE (1) | DE602005000320T2 (en) |
| ES (1) | ES2279461T3 (en) |
| IT (1) | ITMI20040341A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7922845B2 (en) * | 2006-03-29 | 2011-04-12 | Honeywell International Inc. | Apparatus and methods for bonding carbon-carbon composites through a reactant layer |
| KR100647130B1 (en) * | 2006-05-19 | 2006-11-23 | 한일뉴즈주식회사 | Buoyancy device for rigid inflatable boat |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ZA696555B (en) * | 1968-09-19 | 1971-04-28 | Dunlop Co Ltd | Composite boat |
| US4060864A (en) * | 1976-05-03 | 1977-12-06 | Woodstream Corporation | Boat construction incorporating flotation means |
| DE2757241A1 (en) * | 1977-03-11 | 1978-09-14 | Semperit Gmbh | Detachable rigid decking for inflatable watercraft - consists of board held in place by angled panels and in position fixed by bolts with wing nuts |
| US4161796A (en) * | 1977-06-07 | 1979-07-24 | Kransco Manufacturing, Inc. | Monolithic polymer foam sailboat hull |
| US5282436A (en) * | 1992-01-15 | 1994-02-01 | Hansen William M | Foam stabilized watercraft |
| CA2089058C (en) * | 1993-02-08 | 2006-11-07 | John Davis | Pontoons and pontoon vessel |
| IT1298793B1 (en) * | 1998-03-25 | 2000-02-02 | Fb Design Srl | MODULAR MODULAR MULTI-HULL BOAT |
| US6860221B1 (en) * | 2002-12-31 | 2005-03-01 | William C Henderson | Tubular boat having modular construction |
-
2004
- 2004-02-26 IT IT000341A patent/ITMI20040341A1/en unknown
-
2005
- 2005-02-24 DE DE602005000320T patent/DE602005000320T2/en active Active
- 2005-02-24 EP EP05003957A patent/EP1568598B1/en active Active
- 2005-02-24 ES ES05003957T patent/ES2279461T3/en active Active
- 2005-02-24 CA CA002498153A patent/CA2498153A1/en not_active Abandoned
- 2005-02-24 AT AT05003957T patent/ATE348034T1/en not_active IP Right Cessation
- 2005-02-25 US US11/065,928 patent/US20050188909A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| EP1568598A1 (en) | 2005-08-31 |
| DE602005000320D1 (en) | 2007-01-25 |
| ITMI20040341A1 (en) | 2004-05-26 |
| US20050188909A1 (en) | 2005-09-01 |
| ES2279461T3 (en) | 2007-08-16 |
| DE602005000320T2 (en) | 2007-07-12 |
| ATE348034T1 (en) | 2007-01-15 |
| EP1568598B1 (en) | 2006-12-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |