EP2035272A2 - Collapsible boat formed from releasably connected laminar panels - Google Patents
Collapsible boat formed from releasably connected laminar panelsInfo
- Publication number
- EP2035272A2 EP2035272A2 EP07764797A EP07764797A EP2035272A2 EP 2035272 A2 EP2035272 A2 EP 2035272A2 EP 07764797 A EP07764797 A EP 07764797A EP 07764797 A EP07764797 A EP 07764797A EP 2035272 A2 EP2035272 A2 EP 2035272A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- boat
- longitudinal member
- panels
- sailing
- floating vessel
- 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.)
- Granted
Links
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
- B63B3/00—Hulls characterised by their structure or component parts
- B63B3/14—Hull parts
- B63B3/16—Shells
- B63B3/18—Shells characterised by being formed predominantly of parts that may be developed into plane surfaces
- B63B3/185—Shells characterised by being formed predominantly of parts that may be developed into plane surfaces comprising only flat panels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B5/00—Hulls characterised by their construction of non-metallic material
- B63B5/24—Hulls characterised by their construction of non-metallic material made predominantly of plastics
-
- 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
- B63B2007/003—Collapsible, foldable, inflatable or like vessels with foldable members
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H9/00—Marine propulsion provided directly by wind power
- B63H9/04—Marine propulsion provided directly by wind power using sails or like wind-catching surfaces
Definitions
- This invention relates to a floating vessel.
- Water sports are popular outdoor activities. In recent years new sports such as windsurfing and kite boarding are growing in popularity, compared to traditional sailing. They offer more fun and are more accessible in terms of money and space.
- foldable sailing boat responds to very specialized needs.
- Most foldable boats are designed for fishing, kayak travelling or as emergency dinghies. Some of them have an optional sailing rig offered by third parties. A new product needs to be placed in a wider scenario of water and recreational outdoor sports.
- Direct competitors are the very few collapsible sailing boats and foldable kayaks with custom sailing rigs.
- Major examples of collapsible sailing crafts are: the Aquaglide ® , an inflatable multi-sport craft deriving from windsurfing manufactured by Aquaglide® of Washington, USA (retail price £50); the Stowaway ® plywood sailing dinghy manufactured by Stowaway ® Boats Ltd of Northamptonshire, UK (£l,000-£2,000); and the Tinker® inflatable with sailing kit manufactured by Henshaw Inflatables Ltd of Somerset, UK (£2,500-3,000).
- Foldable kayaks are quite popular and their price range is £l,000-£2,500. Small companies offer custom sailing kit for the most popular kayaks (£500-£l,000).
- the kit comprises boat appendices because of the kayak's poor sailing performance.
- the most common folding rowboats, mainly used for fishing or as emergency dinghies are probably the polypropylene Portabote® manufactured by Portabote ® , California, US (from £,300) and the aluminium Instaboat® manufactured by Instaboat®, Montmagny, Quebec, Canada (£800).
- Portabote® manufactured by Portabote ®
- California, US from £1,300
- Instaboat® manufactured by Instaboat®, Montmagny, Quebec, Canada
- £800 aluminium Instaboat® manufactured by Instaboat®, Montmagny, Quebec, Canada
- an entry level sport sailing dinghy has retail prices starting from £,675 (the Topaz Taz®, manufactured by Topper® of Slough, UK), while the best-selling (the Laser® manufactured by Performance Sailcraft Europe Limited of Northamptonshire, UK, with over
- This invention provides a floating vessel comprising, in the orientation of use, a central longitudinal member having a vertical height, and to each side of the longitudinal member, an upper substantially laminar panel connected to the longitudinal member and extending outwardly therefrom and a lower substantially laminar panel connected to the longitudinal member at a distance below the upper panel and extending outwardly from the longitudinal member, wherein the outermost edges of the upper and lower panels are connected and the lower panel is larger in the outward direction than the upper panel such that the panels form a stable structure.
- the outermost edges of the panels are releasably connected. If they are then the panels are releasably connected to the longitudinal member. It may also be that the panels are releasably connected with hook and loop fasteners.
- the panels are formed of cellular or corrugated plastics material. If this is the case, then the corrugations or cells of the upper panel may run transversely to the corrugations or cells of the lower panels.
- the longitudinal member comprises an aluminium beam.
- the vessel is a boat.
- Figure 1 is a graph showing the righting behaviour of one embodiment of the invention at various angles of heel;
- FIGS. 2 to 7 are pictures showing the process of packing one embodiment of the invention flat
- Figure 8 is an illustration of polypropylene after profile rolling according to an embodiment of the invention
- Figure 9 is a picture showing the fixing and sealing solution for the external edges of an embodiment of the invention
- FIGS. 10 to 15 are illustrations of the hull in use with various sails
- Figure 16 is an exploded diagram of a hull according to one embodiment of the invention.
- Figures 17 to 21 show a hull according to one embodiment of the invention from various angles
- Figure 22 shows a hull according to another embodiment of the invention.
- FIGS. 23 to 25 show three possible hull configurations according to the invention. Detailed Description of Exemplary Embodiments
- the proposed product is a small boat, designed for leisure sailing and compatible with conventional sailing rigs (windsurf).
- the main features are the portability and the accessibility that aim to attract new enthusiasts to the boating sports. When needed, it folds to a flat pack with the dimension of windsurfing equipment.
- This product can be a first boat for young people, a leisure boat for families, new sail enthusiasts. It can have a price range much lower than traditional boats and therefore comparable with other popular recreational sport equipment such as high end mountain bike and or a skiing set.
- the strategy could be to offer a boat compatible with existing sailing rigs, thus lowering the price barrier to access for existing sailors and newcomers. This would also lower the barrier regarding acceptability and feasibility, with the possibility of partnering with existing known sail brands for delivering complete boats over their distribution channels.
- the boat is made out of a folded lightweight plastic sheet; e.g. sealed corrugated extruded sheets, since they provide rigidity and high buoyancy.
- a folded lightweight plastic sheet e.g. sealed corrugated extruded sheets, since they provide rigidity and high buoyancy.
- In the fold up configuration (sailing) it forms a hollow body, rigid enough to hold one passenger.
- In the closed position (transport) it is a 'flat pack' of folded panels, which store inside the other parts (rudder, centreboard and sail rig).
- Meshing starting with a traditional curved hull surface, is it possible to mesh it on software packages to polygonal surfaces with small number of faces.
- the difficult of controlling the mesh generator on the tested software makes it difficult to obtain desired foldability and rigidity.
- Geometrical assembly as the opposite of meshing, it is possible to build polygonal surface from scratch by adding polygons to simple shapes. In this way it is possible to control the geometry and keeping the foldability of the hull. 3D software packages allow to generate quickly many shapes, which have been easily visualised with paper models. With the last method a classification of possible polygonal surfaces, according to simple parameters as number of sides on the plan and on the main section. By increasing the number of sides the hull comes closer to the traditional curved hull, thus improving the performance but making the folding and structural issues more complex.
- the hull shapes have to satisfy basic parameters to be considered for a boat.
- Structural rigidity especially longitudinal rigidity. The boat must not bend due to the effect of compression between water and crew weight.
- Buoyancy besides keeping afloat the crew without drafting too much, the boat needs to have reserve buoyancy for safety reasons.
- Positive flotation is the property of floating when filled with water (e.g. after capsize), and is normally achieved with extra floating bodies (e.g. foam) attached to the boat.
- Stability especially transversal stability is important for sail boats.
- the boat needs to generate a righting moment when heeled on the side.
- this is anyway not enough to withstand the force of the wind on the sail and the position of the crew is crucial to keep the boat upright.
- stability is also comfort: not heeling hull design excessively when the crew moves from centre to side, is also much appreciated.
- Drag the resistance to the motion in the water is mainly given by the friction of the water on the boat, and it is proportional to the wetted surface.
- the second main component is generated by the motion of the waves.
- Plane the capacity of the boat to generate a vertical lift by the flow of the water under the hull depends on the hull geometry. If so the boat rises from water at speed (plane) and reduces the resistance to motion. This hydrodynamic effect is quite complicated to calculate also with software and is generally tested in water with models. Generally the flatter the hull, the more the lift it generates.
- “Sailability” or behaviour of the vessel in the sea in different conditions; e.g. sea- worthiness and sea-kindness.
- the first four criteria can be predicted with calculations based on the hull geometry and have been analyzed for the generated hull shapes.
- a professional software (Rhinomarine, a 3D CAD/CAM program for modelling boats, their hydrostatics, stability and performance, produced by Proteus Engineering) has been used for the calculations. They do not exclude any of the shapes nor do they give us a clear winner. They confirm the intuition that increasing the number of sides, the performances increase as we have more parameters to adjust. The choice of the shape is then a trade-off between hull design and the other design areas, where these naval architecture criteria have also been considered.
- Structural rigidity The boat is designed for a displacement of 125 kg, i.e. the weight of a person (75kg) plus the boat and eventual equipment.
- the pressure on the hull is therefore 125 kg over the wetted surface (about 2m 2 ), which in different sailing conditions may reduce up to 50% (boat on a wave or on the plane): therefore 125 Kg/m 2 .
- Buoyancy The twin-walled plastic sheet is extremely buoyant and gives the boat an embedded safety reserve buoyancy, able to hold a person afloat in the case the boat should open up in water.
- the boat is made of about 10 m 2 of empty sheet: with an average thickness of 6mm weight of 1 kg/ m 2 , the material accounts for a positive flotation of 50kg, enough to hold the equipment (mast) and support the person afloat.
- the boat When folded up, the boat generates an enclosed volume of about 300 litres, which gives an displacement for 300 kg, useful for safe navigation on waves, when water may fill up the deck.
- Stability As can be seen in figure 1, the boat has a positive righting moment (i.e. tends to return upright) up to a heel angle of around 80 degrees. The curve is calculated for an initial draft of 10cm and a weight of 100kg (in the middle of the boat).
- Double bottom elegant and efficient solution that resist the folding in order to achieve necessary rigidity and sealing.
- Solid transom (inserted panel): easy and structurally sound solution, adds an extra part to be carried and stored in the boat.
- Solid transom folds on the back as they fold on the front. This is the solution chosen for the proposed design.
- a raised border on the sides has been added to the final design in order to allow the passenger to sit on it.
- the border is an additional small tetrahedron with many functions. Besides forming a seat for the crew and something to hold on, it adds rigidity to the side. Most important function it joins the two sheets and forms the sealing.
- the final design Compared to the test rig configuration, the final design has two sheets of corrugated plastic, fixed in the middle to the central frame.
- This configuration besides allowing the raised side border, allows also to use material of different thicknesses and to orient the corrugations of the two sheets in different directions, to increase the stability.
- Figures 2 to 7 show the chosen folding pattern.
- Figure 2 shows the boat ready for use. To pack the boat away the user must open the sides (figure 3), open the back (figure 4), insert the spars and close the internal sheet (figure 5), close the external sheet (figure 6) and pack the boat flat (figure 6).
- Multi-walled extruded polypropylene sheets such as those used for signs, packaging or construction.
- Correx® is a product produced by
- Corriboard ® is a product produced by Northern Ireland Plastics Ltd, Country Down, Northern Ireland.
- Corrugated polycarbonate sheets which are available in a wider range of thicknesses and rigidity and often used for clear roofing.
- Woven polypropylene sheets such as CURV ® , which is produced by Propex
- Correx® is commercially available with a thickness range from 2mm to 10mm, with different grades.
- the test rig has been made out of 10mm twin-walled polycarbonate sheet, proving to be rigid enough.
- the two sheets included in the proposed design can have different thicknesses, the internal one being lighter. Rigidity depends mostly on the thickness of the single layers or walls of the sheet profile. The right choice has to be made after building full scale prototypes with sheets in the 6mm to 10mm range.
- the boat would be produced on a large scale, it might be possible to develop a custom extrusion.
- the external layer should be thicker to increase the resistance to abrasion, the cells should have a triangular profile, which increases stability and makes scoring the folding lines easier.
- Figure 8 illustrates the appearance of polypropylene after profile rolling.
- Profile rolling allows furthermore to create curved hinges. These are quite important aesthetic features for the final design, as well as they allow the creation of curved surfaces.
- the central frame has been introduced to add longitudinal rigidity to the boat and provide a structural element where all the equipment can be fixed: mast, centreboard, rudder, mainsheet and foot straps for the crew.
- the edges of the external Correx ® sheet are welded at the bow and stern, in order to realize a closed surface in contact with the water. External and internal sheet are fixed to the central frame. The external edges of the two sheets fold on themselves realizing the seal to water, when rubber sealing strips are provided on the contact surfaces.
- buttons, straps, bolts and Velcro® hook and loop fastener
- the last possibility has many benefits: lightweight, easy to open and close, invisible.
- Industrial types of Velcro® are available with high strength.
- moulded tapes with symmetrical "mushrooms" sides. These plastic tapes can be glued or better welded to the polypropylene sheets.
- the symmetric tapes can used both for fixing the boat in the fold up configuration as well as flat pack.
- An alternative to seal solution is an inflatable chamber inside the enclosed volume between the sheets. Such a chamber, realized in thin elastic material which folds on one of the sheets when closed, would solve completely the sealing problem, occupying the volume with air and giving extra rigidity to the structure. This solution has not been integrated so far to simplify the assembly process for the user and avoid pumping.
- Figure 9 shows the fixing and sealing solution for the external edges.
- Weight windsurf rigs are lighter, because using fibre masts and that is essential for this lightweight boat.
- Figures 10 to 15 show the hull in use with various sails: figure 10 is a windsurf like rig (boomless), for example a 'batwing' sail for a kayak; figure 11 is a rigid wing (more efficient, smaller size); figure 12 is a traditional mast/boom rig, for example a Topper; figure 13 is a Lateen sail (boomless) with front mast supports; figure 14 is a Lateen sail (boomless) with back mast supports; and figure 15 is a foldable rigid sail (in sections), same material as the hull.
- boost windsurf like rig
- FIG 11 is a rigid wing (more efficient, smaller size)
- figure 12 is a traditional mast/boom rig, for example a Topper
- figure 13 is a Lateen sail (boomless) with front mast supports
- figure 14 is a Lateen sail (boomless) with back mast supports
- figure 15 is a foldable rigid sail (in sections), same material as the hull.
- Polypropylene and Correx ® scale models to test the folds with thicker and harder material and to test in water.
- RC model the first sailing of the proposed hull shape has been realized with a radio controlled model with a polypropylene hull in scale 1 :5.
- Full-size cardboard model The model has been used as test rig for the folding / unfolding process. The model showed how easy the folding could be and give an idea of the handling of boat in real size. Focusing on the fixing, this prototype inspired the idea of welding together the sheet edges at bow and stern; so that they are automatically in place during the opening/closing process. The idea of embedded handles for easy transportation came also from this test rig.
- Full-size sailing test rig It is made out of separate corrugated polycarbonate roofing sheets.
- the frame is obtained welding PVC square tubes and the hinges are realised with PVC tubes fixed to the sheets with fibreglass reinforced tape and hinged on an aluminium rod.
- the sailing rig and equipment is borrowed from a Topper dinghy and the weight of the mast has forced us to use a metal reinforcement on the PVC frame.
- the sealing has been obtained by taping the hinges, thus partially restricting the unfolding process.
- the total weight of the boat is 27 kg.
- Twin-wall extruded polypropylene sheet is used, cut and scored (profile rolling) to form the folding lines. Edge sealing and welding the material weights 15kg and the required quantity (10 m 2 ) costs on the market about £60.
- the frame is aluminium extrusion machined to realise the fitting to the other parts.
- the supports mast, centreboard, rudder) are injection moulded parts.
- the fasteners are industrial moulded "Velcro®” tape (welded on the polypropylene sheets) supports internal sheet frame sealing and fasteners external sheet
- Figure 16 shows the design, which is composed of an external sheet of multiwall extruded polypropylene 1, an aluminium frame 2, an internal sheet of multiwall extruded polypropylene 3, a nylon injection moulded mast support 4, nylon injection moulded centreboard supports 5, 6, a nylon injection moulded rudder support 7 and rubber and Velcro® sealing stripes 8,9.
- Figures 17 to 21 show a completed hull from various angles.
- Figure 22 is another illustration of a completed hull.
- Figures 23 to 25 are three possible two-sheet configurations of the hull.
Landscapes
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Toys (AREA)
- Professional, Industrial, Or Sporting Protective Garments (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
- Moulding By Coating Moulds (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Medicines Containing Material From Animals Or Micro-Organisms (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
- Handcart (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0612430A GB2440319B (en) | 2006-06-22 | 2006-06-22 | Collapsible boat formed from releasably connected laminar panels |
PCT/EP2007/005528 WO2007147621A2 (en) | 2006-06-22 | 2007-06-22 | Collapsible boat formed from releasably connected laminar panels |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2035272A2 true EP2035272A2 (en) | 2009-03-18 |
EP2035272B1 EP2035272B1 (en) | 2012-04-25 |
Family
ID=36803741
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07764797A Not-in-force EP2035272B1 (en) | 2006-06-22 | 2007-06-22 | Collapsible boat formed from releasably connected laminar panels |
Country Status (5)
Country | Link |
---|---|
US (1) | US20120073491A1 (en) |
EP (1) | EP2035272B1 (en) |
AT (1) | ATE555003T1 (en) |
GB (1) | GB2440319B (en) |
WO (1) | WO2007147621A2 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101368334B1 (en) * | 2013-11-28 | 2014-03-12 | 정경일 | Foldable canoe |
BE1023506B1 (en) * | 2015-10-01 | 2017-04-11 | Onak Bvba | Foldable waterproof structures |
CA3023443A1 (en) | 2017-11-15 | 2019-05-15 | Designer Direct, Inc., d/b/a Levin Associates | Portable solar-electric watercraft |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1872230A (en) * | 1931-04-18 | 1932-08-16 | Blake Thomas Edward | Water sled |
GB529700A (en) * | 1939-06-07 | 1940-11-26 | Alan Vines | Improvements in and relating to collapsible boats |
US3116496A (en) * | 1960-10-03 | 1964-01-07 | Hughes & Co | Folding boat hull |
US3436774A (en) * | 1968-01-09 | 1969-04-08 | William B Schmitz | Watercraft |
US4209867A (en) * | 1978-03-20 | 1980-07-01 | Abrams Henry H Iii | Flexible surfboard |
FR2466260A1 (en) * | 1979-10-02 | 1981-04-10 | Hennebutte Georges | Surf board consisting of pneumatic air-tight bag - has panels of laminated material bonded to sides and supple edging |
CA1262216A (en) * | 1987-07-03 | 1989-10-10 | Robert Timothy Ingram | Folding kayak |
US4961715A (en) * | 1989-01-09 | 1990-10-09 | Shanelec Dennis A | Surfboard construction |
US5568774A (en) * | 1994-01-07 | 1996-10-29 | Miriam M. Benson | Pallets of corrugated sheet material with interlocking components |
US5499594A (en) * | 1994-09-29 | 1996-03-19 | Bullock; Donald C. | Collapsible tension-compression variable hull structure |
US6105531A (en) * | 1998-05-13 | 2000-08-22 | Knight; Robert A. | Kayak knee brace and method of placement |
US5944570A (en) * | 1998-05-28 | 1999-08-31 | Appleby; J. Randolph | Surf riding craft |
US6655314B2 (en) * | 2001-05-07 | 2003-12-02 | On Top Down Under Ltd. | Mast step |
US6615762B1 (en) * | 2001-08-23 | 2003-09-09 | William S. Scott | Foldable boat with light weight hull construction system |
US6729260B2 (en) * | 2001-12-04 | 2004-05-04 | Alf J. Elvestad | Lightweight collapsible boat |
US6619224B1 (en) * | 2002-05-24 | 2003-09-16 | Harold A. Syfritt | Marine vessel |
US6800006B1 (en) * | 2002-10-29 | 2004-10-05 | Hydro-Epoch, Inc. | Surfboard construction having a hollow composite body |
-
2006
- 2006-06-22 GB GB0612430A patent/GB2440319B/en active Active
-
2007
- 2007-06-22 EP EP07764797A patent/EP2035272B1/en not_active Not-in-force
- 2007-06-22 US US12/305,918 patent/US20120073491A1/en not_active Abandoned
- 2007-06-22 AT AT07764797T patent/ATE555003T1/en active
- 2007-06-22 WO PCT/EP2007/005528 patent/WO2007147621A2/en active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2007147621A2 * |
Also Published As
Publication number | Publication date |
---|---|
GB2440319A (en) | 2008-01-30 |
WO2007147621A2 (en) | 2007-12-27 |
WO2007147621A3 (en) | 2008-02-28 |
ATE555003T1 (en) | 2012-05-15 |
EP2035272B1 (en) | 2012-04-25 |
US20120073491A1 (en) | 2012-03-29 |
GB0612430D0 (en) | 2006-08-02 |
GB2440319B (en) | 2008-10-22 |
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