Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
  • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
  • B63B32/00—Water sports boards; Accessories therefor
  • B63B32/50—Boards characterised by their constructional features
  • B63B32/55—Multihull boards, e.g. of catamaran type

Definitions

• Improvements to the catamaran free windsurfing float can also be used in dinghies.
• the invention relates to a catamaran-shaped float usable in free windsurfing or dinghy sailing by the addition of modular elements.
• each hull is designed to receive a rudder equipped with an elastic return mechanism keeping them at rest in the axis of the float, cooperating with a bar controlled by the foot; to lighten the float by filling with foam only in the volume of the deck, to supply the following additional parts to transform said PAVL float into a dinghy:
• a removable fixed mast support including a force distribution plate avoiding the bracing; - two additional rails on top of each hull aft of the deck;
• Equipment for receiving a propeller propulsion unit, and a two-wheeled transport carriage mounted on the rudder bearings.
• the position of the bridge has been moved back as far as possible to allow the user to carry out all his maneuvers from the rear, thus avoiding passing in front of the mast, the deck has been raised, the two hulls are narrower and their outer edge has an overhanging part above the waterline, of tapering width from the rear to the front, we also added toe clips; the underside of the two hulls rises gradually in a slight curve from the rear towards the front to their end which is located above the waterline, in addition, the underside of the two hulls is present in section, a hollow shape with a large radius and this over their entire length.
• FIG.l and 2 show an example of PAVL selo the invention seen in elevation and seen from above;
• - Fig.3 shows a cross section of the PAVL fig.l
• Figs 4 and 5 show two variants of cross section of float in three parts
• - Fig.6 shows, in top view the variants of Fig.4, - Fig.7 shows, in cross section, the detail of the fixing of the hulls on an attached deck according to Figs. 4,5,6
• - Fig.8 shows, seen from above, an example of a manual or foot control bar
• Figs. 9, 10, 11, 12 show the mounting of the rudders and their control means
• Figs. 13, 14, 15 show an example of a preferred variant of a monocoque PAVL without rudder
• - Figs 15, 17, 18 show an example of a float transport carriage hung on the rudder bearings; - Fig.19 shows a motorized propeller propeller assembly mounted on a float according to the invention.
• Fig.l and 2 show, in elevation and in top view, an example of a one-piece float usable in PAVL or dinghy depending on the accessories used. It consists of two identical or possibly symmetrical 1.2 shells, integral with a deck 3 placed widely above the water line 4. it is made in two parts in polyester or in thermoformable plastic material of compatible characteristics, glued on a joint plane 5 fig. 3 seen from the back. Over the entire length of the bridge, the lower part 6 is connected to the external joint plane 5A by including the lower part 7 of the shells 1,2. Beyond the rear vetical lines 8 and front 9, the lower part of the float extends forwards and backwards, interrupting on the horizontal joint planes 5A, 5B for each hull 1,2.
• the width 10 of the shells, at the joint plane is identical over the entire length up to line 12. From 12 begins a spatula shape which rises above the waterline 4. the volume of the hulls is substantially identical to the right of the lines 12,13, but increases between lines 8 and 9 under the bridge , then decreases rapidly after line 12 forward.
• the sides 15, 16 of the hull are slightly sloping on the order of 5 ° and are connected with small convex spokes 17 on a lower curve 18 with a large radius to improve lateral gliding when cornering.
• the upper part 20 of the float comprises the top of the deck, a lateral part of the top of each hull 1, 2 to the right of the deck and the entire top of the hulls in front and behind the deck up to the upper horizontal joint plane 5A , 5B (fig. 3).
• the upper 20 and lower 6 parts of the float are each made in one piece.
• the front spatula 21 of each hull has a plug 22 forming a tow hook.
• the top and bottom of the bridge are slightly domed in shape with a very large radius, the bottom having a smaller radius to increase rigidity and resistance to vibration.
• the top of the bridge has a non-slip coating; it is normally equipped with a front rail 23 for receiving the free mast foot for use in PAVL, or a fixed mast base 25 consisting of a force distribution plate 26 also fixed on the rail 23 by two bolts, it receives a tube 27 welded and possibly reinforced by gussets 28. ' This tube receives the fixed rigging of a dinghy without shrouding. There is also provided, at the rear, also in the axis XX ', a rail 30 for fixing a bar pivot.
• rear ailerons 31 can be mounted on a rail 32 disposed under the rear of each hull 1,2; similarly, another lower rail 33 receives an adjustable fin in position 34 under each shell.
• rudder bearings 35 On the rear face of each hull, rudder bearings 35 have been fixed.
• a variant of the float is provided in three parts: two identical hulls and a connecting bridge 42 ( fig. 4).
• the lower shape of the shells is identical to that of Figs. 1, 2 and 3. On the other hand, it stops at the lower joint plane 5A, 5B on each side of the hull.
• the upper shape is a different shape since it is planar and is connected to its horizontal joint plane by spokes 43,44.
• the foaming can be replaced by a rod of thin extruded plastic film, welded in a sealed manner at its ends and put in place before assembly on the joint surfaces 5.
• a end of the flange, facing the hook plug 22 (fig.1,2) has an inflation nozzle. After welding or gluing the joint plane, the tubes are inflated which take their place by filling the entire internal volume of the hulls preventing the entry of water in the event of a shock piercing the hull. The internal inflation pressure increases the elastic resistance of the shell. The same can be done for the bridge, but it is preferable to fill it with foam or a light and very rigid structure of honeycomb type.
• a variant of deck 50 wider and thicker, therefore more robust than that of the PAVL formula, for use in a dinghy with the same hulls 40.41.
• the bridge has in its internal part, shoulders 51 for supporting and guiding the placement of the shells 1,2.
• the wide dinghy deck has normal rails 23.30, but also additive rails 52.53 and 54.55 to receive a propeller propulsion assembly as described in fig.19.
• the narrow bridge can also receive these rails.
• the hull is provided with a fixing rail 60 cooperating with means complementary to the bridge receiving bolts 61.
• the shell 1,2 comprises a housing 65 in which is disposed an extruded rail 66 of light alloy in the shape of a U comprising two bearing faces 67 on the same plane at its upper part and two small wings
• This rail cut to length in the extruded bar, is glued into its housing by means of self-tapping screws 7 in a counter plate 71 glued to the bottom of the housing 6 before assembly of the shell.
• the corresponding portion 73 of the bridge comes to be applied to the upper face 72 of the separate shell, after fitting the corresponding screws in the spacer tubes 74 engaged glued in an extruded profile 75 of square section made of light alloy around which the upper 76 and lower 77 parts of the bridge are engaged and glued and are connected, on the outside, to a joint plane 78.
• a washer 79 and a cap nut 80 e of stainless steel, secure the bolt on the assembly thus stiffened.
• the arrows 95, 96 show the direction of operation with the foot.
• the rudders 86.87 are arranged articulated in the bearings 35, they each have opposite, a screwed leg 97.98 pierced with a hole 99 (fig.12) in which is engaged the end 100, bent at right angles , of a deflection rod 101 stopped by a clip constituted by a spring leaf 102 the end of which is engaged in a countersunk notch 103, said blade being fixed to the bracket 97.98.
• the middle of the deflection rod 101 (fig. 11) comprises a welded lug 104 provided with a groove 105 in which the end 106 is engaged, bent at right angles, with a rod 107 welded on the end of the bar 85 closed by a plastic plug 109.
• the elastic return of the bar 85, in the longitudinal axis XX 'd float, is ensured by means of two cords 110,111 made of elastically deformable material, attached on the one hand to the hooks 112,113 of the shells 1,2 and on the other hand to a ring 114 welded to the bar 85, said cords having the function, in the absence of actio on the bar, to maintain it normally in the axis XX '.
• Figs. 13, 14 show an example of a variant embodiment of a float according to the invention seen from above and v in elevation. It includes shells 115,116 secured by a bridge 117 forming a one-piece assembly. The position of the mast 118 is advanced forward and the deck extends towards the rear ' so as to allow all maneuvers from the rear, the tacking being carried out by passing under the sail and no longer bypassing the mast from the front as on traditional PAVLs. 119,120 toe clips were placed on each side of and behind the bridge.
• the floats 115, 116 are symmetrical with respect to an axis YY 'and arranged symmetrically with respect to the longitudinal axis XX' of the float.
• a central fin 121 is fixed under each of the hulls on rails 122, 123 secured to the underside of the hulls.
• the hulls are narrow and each have, on their outside side, a border 127, 128 arranged above the water line 129 (fig.15), constituting a flotation reserve.
• the top 130 of the hulls 115, 116 gradually rises from the rear, their lowest point comprising a step 131 for reducing drag, to their front end which is located above the water line 131.
• the bottom 132,133 of the edges 127,128 rises in a straight line at the rear 135 situated above the water line 132, towards the front 136 clearly above this line.
• the underside 137 of the deck 117 is parallel to the water line up to the vertical line 138 where it rises slightly forward.
• Cross section 15 shows the section of the shells 115,116; the underside 139 of these is of slightly hollow shape with a large radius; their internal side 140 and external side 141 are slightly stripped down.
• the edges 127,128 correspond to a buoyancy reserve increasing the bearing surface of the float when it comes into contact with water.
• the lateral flanks 142, 143 are substantially vertical.
• the top 144,145 of the hulls is slightly rounded on the rear and on the front to facilitate flow.
• the top 146 of the bridge 117 is curved transversely to a very large radius and is connected to the sides by two small spokes 147.
• the bottom 148 of the bridge is limited by a radius parallel to the radius 146.
• a wooden reinforcing plate 149 in which is formed a groove receiving the rail 150 for fixing the mast base.
• the middle of this rail is located near 2/3 before the length of the float.
• the entire volume of the deck is filled with foam with a density of around 50kg / m3.
• the connection of the deck to the hulls, in polyester version, is carried out by means of a substantially vertical joint plane extending the outer 151 and inner 152 skin parallel to that of the upper part of the sides 140 and 142,143 of the hulls, this part of the sides is recessed inward so as not to have a projection on which the user could be injured.
• the bridge / hull connection lines are also covered with a robust adhesive strip 154 masking the joint plane. It is the same for the links above / below the upper part and the lower part of the shells produced with the same joint plane.
• the internal skin 148 has spokes 155 for connection to the internal flank of the hulls.
• undershells 139 it is the choice of these operational forms of undershells 139, the edges 127,128 and their location relative to the waterline as well as the arrangement of the deck and the rear shape of the hulls that gives the PAVL according to the invention its remarkable performance on water, at sea, on - lake or river.
• this PAVL can be produced in any compatible material and by any preferably automatable manufacturing process, including injection molding.
• Fig.16, 17 and 18 show an example according to the invention, a carriage for transporting the float to the water.
• Said carriage consists of a tubular structure 160 comprising a first tube 161 bent in a U and a second tube welded parallel to the tube 161 at a distance between axes corresponding to the pitch between the bearings 35 of rudders of the hulls of the float.
• Supporting pins 163, 164 are welded to the right of the vertical axis YY 'of the bearing holes 35 to allow them to be engaged in the holes of said bearings when the carriage is in use.
• the tube 162 receives in the vicinity of the wings 165,166 (FIG.
• fig.19 there is shown, seen in elevation the float of fig.1,2 whose rear of the bridge 3 includes a cradle 180 mounted in clevis on the bridge. It is fixed on the rails 30 or 54,55 (fig. 6).
• This cradle receives a motorization assembly 181 driving a propeller 182.
• a bar 183 makes it possible to direct the float in the absence of rudder and rear wing. This engine makes it possible to transform it into a pseudo "sea scooter".
• a fixed wishbone rigging equipped with a hauling system and a jib hooked on a cable placed between the towing rings 22 (fig.2) or any other conventional adaptable rigging.
• the rudders can also be driven by a system of cables and pulleys instead of a linkage.

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• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• Ocean & Marine Engineering (AREA)
• Bridges Or Land Bridges (AREA)
• Other Liquid Machine Or Engine Such As Wave Power Use (AREA)

Applications Claiming Priority (4)

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• 1988
  • 1988-11-16 FR FR8814865A patent/FR2641516A2/fr active Pending
  • 1988-12-22 AU AU29077/89A patent/AU2907789A/en not_active Abandoned
  • 1988-12-22 EP EP89900838A patent/EP0396591A1/de not_active Withdrawn
  • 1988-12-22 WO PCT/FR1988/000633 patent/WO1989005756A1/fr not_active Application Discontinuation

Non-Patent Citations (1)

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