EP2256024A2 - Embarcation polyvalente modulaire dotée d'un habillage variable - Google Patents

Embarcation polyvalente modulaire dotée d'un habillage variable Download PDF

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Publication number
EP2256024A2
EP2256024A2 EP10164274A EP10164274A EP2256024A2 EP 2256024 A2 EP2256024 A2 EP 2256024A2 EP 10164274 A EP10164274 A EP 10164274A EP 10164274 A EP10164274 A EP 10164274A EP 2256024 A2 EP2256024 A2 EP 2256024A2
Authority
EP
European Patent Office
Prior art keywords
platform
floats
watercraft according
stern
watercraft
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.)
Withdrawn
Application number
EP10164274A
Other languages
German (de)
English (en)
Other versions
EP2256024A3 (fr
Inventor
Pierluigi Priolo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Universita degli Studi di Cagliari
Original Assignee
Universita degli Studi di Cagliari
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Universita degli Studi di Cagliari filed Critical Universita degli Studi di Cagliari
Priority to EP10164274A priority Critical patent/EP2256024A3/fr
Publication of EP2256024A2 publication Critical patent/EP2256024A2/fr
Publication of EP2256024A3 publication Critical patent/EP2256024A3/fr
Withdrawn legal-status Critical Current

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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 
    • B63B1/00—Hydrodynamic or hydrostatic features of hulls or of hydrofoils
    • B63B1/02—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement
    • B63B1/10—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls

Definitions

  • the present invention relates to a modular multi-purpose watercraft with variable trim.
  • the modular multi-purpose watercraft described in said previous application essentially comprises at least one pair of hulls consisting of surf, windsurf or kitesurf boards, and a topside that interconnects the two hulls and is configured for the selective application of:
  • said topside can be configured for application of a tent structure for nautical camping.
  • This watercraft has some limits in the applications and technical characteristics thereof, which limit flexibility of use and variation in size thereof, for example relative to the fact that the hulls are solely of the windsurf board type, and that the structure of the watercraft is not sufficiently flexible for the widest possible range of outboard applications, which cause problems of trim by stern and trim by head.
  • the object of the present invention is to indicate a modular multi-purpose watercraft with variable trim suitable to overcome all the aforesaid drawbacks and limits, and also suitable to maximize the flexibility of use and the variation in the dimensions of the constituent elements.
  • the subject matter of the present invention is a multi-purpose watercraft, comprising: a pair of tubular or board-shaped floats; a rigid platform that interconnects said two tubular floats; shock absorber means between said floats and said platform; a motor support frame, connected to said platform, suitable to allow vertical translation and horizontal translation of the position of the motor with respect to the platform; a pair of flaps connected to the sides of the bottom part of the frame and under respective floats, on the stern side, through means to adjust the inclination of the flaps according to an axis substantially horizontal and transverse to the watercraft.
  • the multi-purpose watercraft according to the invention comprises, in different possible configurations shown in Figures 1.1 to 3.2 , a structural part, in turn comprising a pair of hulls consisting of two tubular floats 1 and 2, and a rigid platform 3 that interconnects the two floats 1, 2, producing a catamaran type craft.
  • FIGS 4 and 5 show two preferred variants of embodiment of the structural part of the watercraft.
  • each float is connected rigidly to the platform, and comprises a rigid shell 9, and an inner cavity provided with an elastic membrane 10, preferably made of metal, to divide it in an intermediate position for the full length thereof.
  • the membrane 10 defines a hollow bottom part 11 filled with gaseous fluid (e.g. air), and a hollow top part 12 filled with liquid fluid (e.g. oil). The two parts are not communicating.
  • Corresponding cavities are produced inside the parts of the platform 3 on top of the two floats.
  • An elastic membrane 13, preferably made of metal, is present in each cavity, to divide it in an intermediate position for the entire length thereof. Also in this case the membrane 13 defines a hollow bottom part 14 filled with liquid fluid, and a hollow top part 15 filled with gaseous fluid.
  • the two parts 14 and 15 are not communicating, while the two corresponding cavities, the top one 12 of the float and the bottom one 14 of the platform are intercommunicating through appropriate channels 16, so that the liquid fluid can at least partly from pass one cavity to the other.
  • the two tubular floats 1 and 2 can be made of rigid or inflatable material. With the variant shown in Figure 4 , the following results are obtained:
  • the channels 16 provided for connection of the compartments in the floats and in the platform, i.e. for transfer of the liquid fluid from one compartment to the other, have a section adjustable in diameter.
  • each float comprises a rigid shell 20, and an inner cavity in which air can be present.
  • the inner part of the float can be filled with floating material, such as expanded polyurethane.
  • the floats are connected elastically to the platform through hydropneumatic suspensions. More in particular, two suspensions are present, shown in greater detail in the two dashed line boxes in the figure.
  • appropriate hollows 21, 22, produced in the platform 3 there are housed appropriate hydropneumatic actuators 23, 24, with horizontal elastic arm which respectively control levers 25, 26, which in turn act through hinges on vertical pins 27, 28 connected to respective plates 29, 30 secured to the top part of the floats.
  • an electropump 31 is present, with a tank 32 for collection of the suspension fluid and relative hydraulic circuit 33 for hydraulic control of the suspensions.
  • the hydropneumatic suspensions form an elastic system, which changes the vertical motion of the pins (27, 28) connecting the floats to the platform into horizontal motion through the hinged linkage (25, 26) which insists on the hydropneumatic element, mounted horizontally inside the compartments in the platform.
  • the floats can also be of the board type, for example consisting of surf, windsurf or kitesurf boards. It is also evident that shock absorber means are provided between the floats and the platform, to optimize the behaviour of the watercraft in relation to the conditions of the waters in which it is sailing, especially in the case of particularly rough waters.
  • the Figures also show an auxiliary frame 4 to support the motor 7.
  • a preferred embodiment of the auxiliary frame is shown in Figures 6.1, 6.2, 6.3 .
  • the auxiliary frame 4 comprises a support 51 and a plate 52 acting as stern transom, mutually connected in an adjustable manner.
  • the support 51 engages in the stern part of the platform 3 with central projection, and is composed of horizontal extensions which are embedded in the platform.
  • the position in longitudinal direction of the extensions with respect to the platform 3 can be varied (arrow FA) by screwing them by means of slots 53.
  • four extensions are shown by way of non-limiting example.
  • the plate 52 acting as stern transom, in substantially vertical position, is connected to the support 51 to be able to vary the vertical relative position (arrow FB) screwing it by means of slots 54.
  • the motor 7 is connected to the plate (stern transom) 52.
  • the position of the motor with respect to the hull can therefore be adjusted, adjusting the position of the plate (stern transom) both in horizontal and vertical direction, according to the directions indicated by the arrows FA and FB.
  • stern flaps 55, 56 are present, which are necessary to contribute to provide lift during starting and prevent the trim by stern phenomenon.
  • the flaps 55, 56 consist of two plates positioned under the floats 1, 2, at the stern, with variable inclination (curved arrow FC).
  • a lateral end of the flaps is connected to respective brackets 57, 58, in turn hinged at one end in corresponding brackets 59, 60 vertically connected to the plate 52 by means of the slots 54.
  • the flaps 55, 56 are connected in the bottom stern part of the floats 2, 3 by means of adjustment screws 61, which abut on one side in a position 62 of the central flap and moved back with respect to the hinge side, and on the other side in a longitudinal track 63 produced in the bottom side of the float.
  • the purpose of the longitudinal track 63 is for longitudinal sliding of the connection point of the flap to the float, in order to take up the longitudinal adjustment of the motor support (arrow FA).
  • An elastic element 64 is provided between the two ends of the screw 61 to allow the screw 61 to be turned to adjust the inclination of the flap, varying the distance between flap and float in the connection point, with the same vertical position of the brackets 59, 60.
  • the rotation/inclination axis 65 of the flap is therefore positioned horizontally and transversely to the watercraft, at the stern and under the float.
  • the multi-purpose watercraft is suitable for use with outboard motors having different shaft lengths (currently called “short shaft” and “long shaft”) and for mounting tubular floats of variable dimensions, i.e. with different vertical heights.
  • the objective is to obtain a varied range of products on models having different dimensions of platform connecting the floats, according to the requirements for load carrying capacity and power requested.
  • the platform 3 can be made of appropriate materials, such as moulded plastic material, or wood such as teak, with non-slip surface. Photovoltaic panels, of the type that can be walked on, can also be fitted to the surface of the deck.
  • Elastic gaskets 39 for example made of neoprene, can advantageously be interposed between the platform 3 and each float 1, 2 to minimize localized shearing stresses.
  • the platform 3 defines the deck of the watercraft according to the invention, provided to allow easy and simple transformation from one to another of the various possible configurations the watercraft can assume, some of which are shown in Figures 1.1 to 3.2 .
  • the platform can be produced in superimposed layers: expanded polyurethane, with appropriate shape that adapts to the bridge, can be used as core in the inner layers.
  • expanded polyurethane with appropriate shape that adapts to the bridge, can be used as core in the inner layers.
  • plywood such as Okoumè
  • a soft elastomeric foam gasket is used between surf boards and bridge, and finally mats and rush matting can be used in the leather parts of the platform.
  • FIG. 1.1 and 1.2 A first variant of configuration that the watercraft can assume is shown in Figures 1.1 and 1.2 : the platform comprises at the stern the auxiliary frame 4 (schematized in the figures) to support the motor 7, and centrally, one or more central mast steps 14.
  • the mast steps 14 can be used selectively to position a mast foot 15 for articulated coupling of an assembly comprising a windsurf mast 16, sail 17 and boom 18.
  • Different positioning of the assembly on the steps depends on the sail surface, the intensity of the wind and the number of persons on board.
  • This configuration can be completed if necessary by rendering the mast 16 fixed, instead of articulated, at the base thereof, by providing an appropriate rigging, not shown.
  • Figures 3.1 and 3.2 represent another possible variant of configuration of the multi-purpose watercraft according to the invention.
  • the deck defined by the platform 3 houses a steering unit consisting of a seat 40 with a steering wheel 41 and hand levers 42 to control an outboard motor 7 installed through the auxiliary frame 4 on the platform.
  • the steering unit may in this case be located in the most suitable position, i.e., more towards the stern or more towards the bow, using the mast steps 14 and attachment devices similar to mast feet or of other type.
  • an elastic gasket 43 can advantageously be interposed, for example made of neoprene, having the function of reducing stresses caused by contact of the watercraft with the water.
  • the watercraft is equipped with a kitesurf sail 71.
  • the sail 71 is connected to the hull 3 through guy ropes: there are four of these (two pairs 72 and 72') secured to the four ends of the sail, for example to rings 73 already normally provided at said ends, and two others (74, 74') secured at intermediate points of the bottom side of the sail, for example to rings 75 already normally provided in these points of the sail.
  • the four guy ropes (72, 72') at the ends of the sail pass through pulleys 76 secured on the hull 3 laterally to a central stern position with a seat 77 that can rotate or move longitudinally on the hull (arrow FD), so that the handgrip ends of the cables 78 can be operated by a helmsman seated on the seat 77.
  • the other guy ropes 74, 74'of the bottom side of the sail pass through other pulleys 79 secured on the hull 3 in front of a central bow position with a seat 80 that can rotate or move longitudinally on the hull (arrow FE) so that the handgrip ends of the cables 81 can be operated by a bowman seated on the seat 80.
  • the sail After use, the sail can be withdrawn into a specific housing easily produced on the hull.
  • the multi-purpose watercraft according to the invention is provided with extreme practicality and flexibility of use and, although using generally conventional components in part, it is able to easily and rapidly assume a plurality of different configurations for the maximum satisfaction of use at relatively limited costs.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Body Structure For Vehicles (AREA)
  • Laminated Bodies (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
EP10164274A 2009-05-29 2010-05-28 Embarcation polyvalente modulaire dotée d'un habillage variable Withdrawn EP2256024A3 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10164274A EP2256024A3 (fr) 2009-05-29 2010-05-28 Embarcation polyvalente modulaire dotée d'un habillage variable

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP09425214A EP2261109A1 (fr) 2009-05-29 2009-05-29 Embarcation polyvalente modulaire dotée d'un habillage variable
EP10164274A EP2256024A3 (fr) 2009-05-29 2010-05-28 Embarcation polyvalente modulaire dotée d'un habillage variable

Publications (2)

Publication Number Publication Date
EP2256024A2 true EP2256024A2 (fr) 2010-12-01
EP2256024A3 EP2256024A3 (fr) 2011-02-23

Family

ID=41361337

Family Applications (2)

Application Number Title Priority Date Filing Date
EP09425214A Withdrawn EP2261109A1 (fr) 2009-05-29 2009-05-29 Embarcation polyvalente modulaire dotée d'un habillage variable
EP10164274A Withdrawn EP2256024A3 (fr) 2009-05-29 2010-05-28 Embarcation polyvalente modulaire dotée d'un habillage variable

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP09425214A Withdrawn EP2261109A1 (fr) 2009-05-29 2009-05-29 Embarcation polyvalente modulaire dotée d'un habillage variable

Country Status (1)

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EP (2) EP2261109A1 (fr)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3326166A (en) * 1966-01-10 1967-06-20 John V Yost Boat construction
US3860982A (en) * 1971-05-17 1975-01-21 Rollin Douglas Rumsey Convertible trailer/boats
DE3318638A1 (de) * 1983-05-21 1984-11-29 Günter Ing.(grad.) 6240 Königstein Heinze Gleitfaehiger segelkatamaran
US4716847A (en) * 1985-08-08 1988-01-05 Wilson Jr Earl B Multiple-hulled marine vessel
US4909175A (en) * 1988-10-05 1990-03-20 Arnseson Howard M Boat with trimmable bottom
US5228404A (en) * 1992-07-28 1993-07-20 Gibbs Louis L Catamaran suspension system
US6176190B1 (en) * 1999-07-12 2001-01-23 John Ozga Suspension system for a speed boat

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Also Published As

Publication number Publication date
EP2256024A3 (fr) 2011-02-23
EP2261109A1 (fr) 2010-12-15

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