EP0577595A1 - Planche a voile. - Google Patents
Planche a voile.Info
- Publication number
- EP0577595A1 EP0577595A1 EP91907512A EP91907512A EP0577595A1 EP 0577595 A1 EP0577595 A1 EP 0577595A1 EP 91907512 A EP91907512 A EP 91907512A EP 91907512 A EP91907512 A EP 91907512A EP 0577595 A1 EP0577595 A1 EP 0577595A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- board
- mast
- foot
- mast foot
- user
- 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
- B63B32/00—Water sports boards; Accessories therefor
- B63B32/40—Twintip boards; Wakeboards; Surfboards; Windsurfing boards; Paddle boards, e.g. SUP boards; Accessories specially adapted therefor
- B63B32/45—Fixation means for feet of the board user, e.g. footstraps
-
- 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
- B63B32/68—Mast foot attachments, e.g. mast foot rails
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H8/00—Sail or rigging arrangements specially adapted for water sports boards, e.g. for windsurfing or kitesurfing
- B63H8/20—Rigging arrangements involving masts, e.g. for windsurfing
- B63H8/24—Arrangements for connecting the rigging to a board
Definitions
- the present invention relates to a windsurfing board.
- windsurfing boards which are, in general, capable of receiving on their upper face, a mast capable of carrying a sail and fixed by a mast foot on the board, and toe clips intended to hold the feet of a user of the board and located towards the rear of the board with respect to the foot of the mast.
- a windsurf board receives dynamic stresses of various kinds during its evolutions on the water: it receives stresses due to choppy water, falls, reception on the underside in contact with water. water after a jump; it also receives, on its upper face, stresses transmitted by the mast foot on the one hand, by the feet of the user retained by the toe clips on the other hand.
- These various stresses generate vibrations of the board.
- these vibrations consume energy, require additional physical expenditure on the part of the user of the board, and cause it to brake.
- some of these vibrations the frequency of which corresponds to a natural frequency of the board, generate resonance phenomena which aggravate the aforementioned drawbacks.
- the object of the present invention is to remedy the drawbacks of known windsurfing boards, and to propose a windsurfing board in which the phenomena of resonance to vibrations of low and medium frequencies, which are the most troublesome, are at least for good share eliminated.
- the windsurfing board of the aforementioned type is characterized in that it includes flexible means for supporting the mast foot cantilevered above the board, and for communicating to the board in a region behind the mast foot the forces transmitted by it.
- the stresses transmitted by the mast foot are thus communicated to the board in a region located behind the mast foot, therefore at a distance from the toe clips clearly lower than on an ordinary board: the natural frequency of the board is found thus clearly shifted towards the high frequency range, of which it is known that the corresponding vibrations have only a negligible effect on the performance of the board.
- the mast foot is supported in cantilever by flexible means, the stresses and vibrations that it transmits are at least partially damped before being communicated to the board.
- the board also includes flexible means for supporting the toe clips and the weight of the user of the board overhanging it and for communicating with the board in a region located behind the mast foot and in front of the toe clips the forces transmitted by the feet of the user of the board.
- This arrangement makes it possible to bring the respective points of application on the board even closer to the forces transmitted to it by the mast foot and to those transmitted by the toe clips. Such an approximation makes it possible to shift the natural frequencies of vibration of the board even more clearly towards the range of high frequencies.
- the forces transmitted by the toe clips are also at least partially absorbed by these flexible means before being communicated to the board.
- the means for supporting the mast foot and, where appropriate, the means for supporting the toe clips and the weight of the user of the board are movable on the latter, and the mast foot and the toe clips are movable on their respective supports.
- the user can thus better control the location of the vibration nodes and the values of the natural frequencies of the board.
- the means for supporting the mast foot and the means for supporting the toe clips constitute a single element, which is an elongated element in the longitudinal direction of the board, this elongated element comprising a section central by which it is fixed to the board, a front section cantilevered above the board, which supports the mast foot, and a rear section, cantilevered above the board , which supports the toe clips and the weight of the board user.
- the implementation of the invention is thus simple and easy, therefore inexpensive.
- the board comprises a rigid lower part intended to come into contact with water and to give the board substantially all of its mechanical characteristics, and a light and flexible upper part intended to ensure the buoyancy of the board, and the elongated element is fixed to the rigid lower part of the board by its central part.
- FIG. 1 is a partial schematic view in elevation of a windsurfing board according to the prior art
- FIG. 2 is a view similar to Figure 1 of a windsurfing board according to a first embodiment of the invention
- - Figure 3 is an enlarged perspective view of the device which supports the foot of the mast shown in Figure 2;
- FIG. 4 is a partial top view of a windsurf board provided with the device of Figure 3;
- FIG. 5 is a view similar to the figure
- FIG. 6 is a sectional view along VI-VI in Figure 5;
- - Figure 7 is a longitudinal sectional view along VII-VII in Figure 8 of a windsurfing board according to a second embodiment of the invention;
- - Figure 8 is a top view of the board shown in Figure 7, the mast being removed;
- - Figure 9 is a partial exploded perspective view of the board shown in Figures 7 and 8;
- FIG. 12 is a partial perspective view of the windsurf board according to the invention showing an adjustable toe block according to the invention;
- - Figure 13 is a partial sectional view along XIII-X II in Figure 12;
- Figure 14 is a view similar to Figure 13 of another method of fixing the toe clip with eccentric wedge
- FIG. 15 is a partial sectional view along XV-XV in Figure 14.
- the windsurf board 1 has on its upper face, in a known manner, a mast 2 capable of carrying a sail (not shown) and fixed by a mast foot 3 on the board 1, and toe clips 4 intended to hold the feet of a user of the board and situated towards the rear of the board with respect to the mast foot 3.
- the stresses received by the board 1 on its upper face are those transmitted respectively by the mast foot 3 and by the feet of a user retained by the toe clips 4: the vertical components of these stresses are shown diagrammatically in the figure respectively by the arrows F ⁇ , F 2 , F3 whose points d application projected on an axis 5 parallel to the longitudinal axis of the board are respectively A, B and C.
- the location of the mast foot 3, and that of point A on the axis 5, are determined for a given board and for a given sail, by the position of the center of thrust of the sail, the navigation conditions and the type of the board.
- the longitudinal distance separating the mast foot 3 from the nearest toe clip 4, that is to say the distance AB or d, is relatively large, for example of the order of 80 cm.
- the board 1 comprises a flexible element 6 elongated substantially in the longitudinal direction of the board, this element comprising a rear section 7 by which it is fixed to the board 1, and a front section flexible 8 cantilevered with respect to the upper surface of the board, the mast foot 3 being fixed to the element 6 substantially at the front end 9 of the front section 8.
- the vertical component F ⁇ des stresses transmitted by the mast foot 3 to the board 1 is applied at a point projected at A 'on the axis 5.
- the point A is located on the axis 5 behind the point A', of a distance AA' ⁇ d '.
- the distance A'B d "is thus equal to d - d 'and is much less than d.
- the rear 7 and front 8 sections of the element 6 are connected to each other by a median section 10 in the form of a step which separates the front section 8 from the plane of the section 7.
- the element 6 is fixed to the board 1 by its rear section 7 via, for example, two knurled nuts 11.
- the toe clips 4 are each fixed on a base 12 itself fixed to the board by means, for example, of two knurled nuts 13.
- the support 6 of the mast base 3 is movable longitudinally ent on the board 1, and is capable of pivoting by relative to the board around an axis substantially perpendicular to the upper surface thereof.
- the two knurled bolts 11 are screwed onto screws 14, the heads of which are for example movable in a longitudinal slide 15 formed on the upper surface of the board 1.
- the most forward screw 14a serves as an axis of rotation. : it passes through a hole 16 made in the support 6 near the middle part 10 thereof.
- the screw 14b located behind the screw 14a passes through a circular groove 17 formed very close to the rear end of the rear part 7 of the support 6: the center of the groove 17 is on the axis of the hole 16.
- the rear end of the support 6 is for this purpose widened to give a certain length to the groove 17 and thus give the support 6 a certain angular movement.
- the support 6 has near its front end 9 a longitudinal groove 18 which makes it possible to vary the location of the mast foot 3.
- the mast foot 3 is fixed in the groove 18 in any known manner, for example by means a knurled nut 19 screwed onto a screw secured to the mast base 3 and which passes through the groove 18.
- the upper surface of the board 1 has a recessed part 20 perpendicular to the mast base 3.
- the support can be a rectilinear element 21, the front part 8 of which is cantilevered above the hollowed out part 20.
- the support 21 shown has at its rear part a circular groove 17 allowing it to pivot around the screw 14a. It also has at its front end a longitudinal groove 18 allowing the longitudinal adjustment of the mast base 3.
- the screws 14a and 14b have been shown fixed on the board 1. It will be understood that the screws 14a and 14b could also be movable in a slide such as 15.
- the embodiment of Figures 5 and 6 has the advantage of not raising the mast foot 3 as much as the embodiment of Figures 2, 3 and 4. Only the central part of the board is hollowed out so as not to disturb the flow of water along the edges thereof.
- the flexible support 6, 21 can be made of composite materials reinforced with long fibers, for example.
- the support 6, 21 can have a sandwich structure comprising for example at least one layer of viscoelastic material to dampen vibrations.
- the board 41 has a rigid lower part 42 intended to come into contact with water and to give the board 41 substantially all of its mechanical characteristics, and an upper part 43 which is light and flexible. intended to ensure the buoyancy of the board 41.
- the rigid lower part 42 is for example made of synthetic material reinforced with longitudinal fibers, can consist of several layers and have a laminated or composite structure. It supports the fin 44, if necessary a fin (not shown) in its well.
- the rigid lower part 42 can thus have, for example, a sandwich structure comprising a core, made for example of an expanded foam or of a structure produced in honeycomb or in profiles, and, on both sides other of this core, a resistant layer or skin made up of fibers, for example glass, carbon or aramid, coated with a thermosetting resin.
- Resistant skin can also be made in one thermoplastic material, which may or may not include fibers of the above type.
- the first part 42 may have a known laminated structure consisting of several superimposed layers:
- these layers contain fibers arranged longitudinally, others can contain fibers arranged for example transversely or in two directions perpendicular to each other and each making an angle of 45 ° with the longitudinal direction; these layers are coated with thermosetting or thermoplastic resins;
- these layers are made of the aforementioned core materials; - Some of these layers can be layers of intergrown viscoelastic materials to give greater damping capacities to the structure. The viscoelastic material, being subjected to shear stresses, will dissipate the energy transmitted to the structure in the form of heat.
- the structure of the first part 42 is thus designed so as to optimize the performance of the board 41 by taking into account only the physical and mechanical parameters such as load of the board, distribution of the stiffness in bending and in torsion, dynamic characteristics of the board, water flow along it, breaking strength,
- the upper part 43 is made of a flexible and light material, for example of expanded foam, or is an inflatable structure. This upper part is not adapted to withstand the forces transmitted to the board 41 by the mast foot 3 and by the feet of the user of the board blocked in the toe clips 4.
- the board 41 has for this purpose a single flexible element 45 to support both the mast foot 3 and the toe clips 4 as well as the weight of the user of the board cantilevered above the board 41.
- this single element is a support 45 elongated in the longitudinal direction of the board 41; the support 45 comprises a central section 46 by which it is fixed to the board 41, a flexible front section 47, cantilevered above the board 41, which supports the mast base 3, and a rear section flexible 48, cantilevered above the board, which supports the toe clips 4 and the weight of the user of the board 41.
- the front section 47 has, like the support 6 of FIGS. 2 to 6, a longitudinal groove 18 which makes it possible to vary the location of the mast base 3 by loosening the nut 19.
- the elongated support 45 is fixed to the lower part 42 of the board 41 by its central section 46. As shown in FIG. 9, this section 46 is fixed to a solid spacer 49 itself fixed to the lower part 42 of the board 41.
- the spacer 49 could obviously be in one piece with the support 45, or be replaced by equivalent elements, for example two longitudinal bars 49a (see FIG. 10) or rigid or flexible studs, for example elastic supports 49b ( see figure 11).
- the position of the support 45 is adjustable on the lower part 42 of the board 41.
- the spacer 49 is fixed to this part 42 by fixing elements 50, for example bolts, capable of sliding in slides 51 arranged longitudinally along the lateral edges 52 of the part bottom 42 of the board 41.
- the slides 51 could be replaced by inserts (not shown) embedded in different places of the lower part 42 and tapped so as to receive fixing screws for the central section 46.
- the ratio between the distance X and the total length L of the board can be between 2 and 5 and is preferably close to 3 enviro.
- the spacer 49 advantageously has a length of approximately 20 cm and a thickness of approximately 3 cm, for example. It is made of a suitable rigid material.
- the upper part 43 of the board 41 is fixed to the lower part 42 of the latter, but is independent of the elongated support 45. It has for this purpose a recessed part 53 so as to allow it to slide or move therefrom , as well as the vibrations of the flexible cantilever sections before 47 and rear 48 thereof.
- these fixing methods can be used to fix the foot of the mast 3 and the wedges foot 4 on the board 1 according to the embodiment of FIGS. 2 to 6, or on the support 46 of the board 41 according to the embodiment of FIGS. 7 to 9. They can also be used for fixing the spacers 49, 49a, 49b on the lower part 42 of the board 41.
- the base 12 of the toe clip 4 is movable in the longitudinal direction of the board 1 and is capable of pivoting relative to the board 1 about an axis substantially perpendicular to the upper surface of that -this.
- the base 12 is fixed on the board, substantially like the support 6, for example by knurled nuts 13 screwed on screws 22 whose head is movable in a slide 23 extending substantially in the longitudinal direction of the board.
- the base 12 has at its two longitudinal ends respectively two circular grooves 24, 25 diametrically opposite on the same circle.
- the screws 22 pass through each of the grooves 24, 25 respectively.
- the base 12 can therefore be pivoted relative to the board 1.
- the slide 26 shown can be used both for the slide 15 for fixing the support 6 and for the slide 23 for fixing the base 12 of the toe clip 4.
- the slide 26 is for example constituted by an extruded section of U-shaped section whose ends of the legs have been folded inwards.
- the head 27 of the screw 28 is thus retained by the said folded ends, and only the body of the screw 28 comes out of the slide.
- a knurled nut 29 is screwed onto the screw 28.
- the nut 29 and the screw 28 can thus be used both in place of the nuts 11 and the screws 14 for fixing the support 6, 21, as in place of the nuts 13 and screws 22 for fixing the base 12 of the cleat 4.
- the fixing by screw 28 and nut 29 is replaced by a pivoting eccentric element 30, which is known in itself and which will only be described quickly.
- the eccentric element 30 comprises two parallel cheeks 31 and 32 which carry the pivot axis 33 and which surround the support rod 34 secured to the head 35 retained in the slide 36.
- All the elements described above are preferably made of plastic, but some can also be made of light metal, in particular the slides, the screws and the nuts.
- the two embodiments described above of the windsurfing board of the invention make it possible to shift the vibration frequencies of said board towards the high frequency range by bringing the points of d 'application on the board of the forces transmitted to it by the mast foot 3, on the one hand, by the feet of the user of the board locked in the toe clips 4, on the other hand. These efforts are also at least partially damped before being transmitted to the board.
- the flexible cantilever support of the mast foot 3 also serves to dampen the vibrations of the board and its shocks against water and waves, before transmitting them. mast and sail, which has a favorable effect on the stability of the sail.
- the support 6, 21 vibrates as indicated by the arrow F 5 in FIG. 2.
- the front 47 and rear 48 sections of the support 45 vibrate as indicated respectively by the arrows Fg and ⁇ at the Figure 7. Furthermore, due to the particular structure of the board 41, the front and rear parts of the latter flex and / or vibrate respectively as indicated by the arrows Fg and Fg.
- the invention is not limited to the embodiments which have just been described, and many changes and modifications can be made to them without departing from the scope of the invention.
- the support 6 could be composed of two parts, a base fixed on the board and adjustable relative to the latter, and a flat element fixed to the base and carrying the mast foot 3 in cantilever , this flat element itself being adjustable relative to the base, to allow for example to modify the length of the overhang and therefore the rigidity of the cantilever part.
- the mast base could be adjustable transversely on the front section 47 of the support 45. Likewise, the adjustments in accordance with the invention have been described above as if they could only be modified while the board is stopped, on land or on the water.
- the invention is also applicable whatever the number and the type of the toe clips, this number and this type being able to be different from those described.
- the support 45 could be adapted to an ordinary board such as board 1, the spacer 49 being fixed on the upper part of the board.
- the support 45 could also be fixed to the board in the manner described for the support 21 of FIGS. 5 and 6, the board comprising at its upper part a recessed part such as 20 under the front section 47 and another under the rear section 48 .
- the light and flexible upper part 43 of the embodiment of FIGS. 7 to 9 a discontinuous structure, for example in the form of flakes arranged substantially transversely to the board 41, independent of one of the 'other and individually connected to the first part 42.
- These scales which are for example glued to the first part 42, comprise a main core substantially perpendicular to the part 42 and directed transversely with respect thereto. This core is extended towards the rear of the board substantially in the longitudinal direction thereof, by lateral edges closer to the lateral edges of the board than the ends of the core and which surround the core of the flake. located immediately behind the first one, so as to channel the water and avoid braking the water streams, which would have the effect of braking the board.
- the core is extended, at its upper end, by an upper rim directed substantially towards the rear of the board and which covers the core of the next flake.
- the webs of these scales are inclined towards the rear of the board 41 to facilitate the flow of the water.
- the side edges are detached from the upper surface of the first part 42 so as to have no stiffening effect thereof.
- the scales make it possible to produce a second part 43 of the board 41 having the volume necessary to ensure the buoyancy of the latter without affecting the mechanical characteristics of the first part 42, in particular its longitudinal flexibility: in fact, these scales have no or practically no longitudinal parts capable of acting as stiffening ribs. Furthermore, in the embodiment of FIGS.
- the hollowed out part 53 of the upper part 43 of the board 41 can be covered with an elastic (not shown) and waterproof skin also covering the flexible support 45 without opposing the oscillations of the cantilever sections 47 and 48; it is thus possible to avoid any entry of water into this hollowed out part 53 so as not to weigh down the board 41.
- Such skin known per se, could possibly be removable.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Rehabilitation Tools (AREA)
- Percussion Or Vibration Massage (AREA)
- Ceramic Products (AREA)
- Seal Device For Vehicle (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Accommodation For Nursing Or Treatment Tables (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9002643A FR2659057A1 (fr) | 1990-03-02 | 1990-03-02 | Planche a voile. |
PCT/FR1991/000258 WO1992017368A1 (fr) | 1990-03-02 | 1991-04-02 | Planche a voile |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0577595A1 true EP0577595A1 (fr) | 1994-01-12 |
EP0577595B1 EP0577595B1 (fr) | 1994-10-19 |
Family
ID=37318427
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP91907512A Expired - Lifetime EP0577595B1 (fr) | 1990-03-02 | 1991-04-02 | Planche a voile |
Country Status (7)
Country | Link |
---|---|
US (1) | US5396856A (fr) |
EP (1) | EP0577595B1 (fr) |
AT (1) | ATE113018T1 (fr) |
DE (1) | DE69104733T2 (fr) |
ES (1) | ES2065021T3 (fr) |
FR (1) | FR2659057A1 (fr) |
WO (1) | WO1992017368A1 (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6461210B2 (en) * | 2000-03-03 | 2002-10-08 | Timoty A. Lorenzo | Wakeboard with tubular frame and binding footplate having multidirectional adjustability |
US6668741B1 (en) * | 2000-12-07 | 2003-12-30 | Steve Curtiss | High performance sailing craft |
DE202014007759U1 (de) | 2014-09-30 | 2014-10-22 | Karl Hesse Gmbh & Co. Kg | Surfbrett |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL7902081A (nl) * | 1979-03-15 | 1980-09-17 | Derk Frans Thijs | Zeilvoertuig. |
DE2938877A1 (de) * | 1979-09-26 | 1981-04-09 | Georg Dr. 4400 Münster Kassat | Windgetriebener ski |
IT1178090B (it) * | 1984-01-20 | 1987-09-09 | Antonio Ferruccio | Dispositivo per il montaggio dell'albero di una tavola a vela |
US4649847A (en) * | 1985-04-04 | 1987-03-17 | Tinkler Robert C | Hull construction |
DE3614350A1 (de) * | 1986-04-28 | 1987-10-29 | Binder Kunststofftechnik | Segelbrett und verfahren zu dessen herstellung |
FR2607463B1 (fr) * | 1986-11-28 | 1989-02-17 | Moulin Olivier | Coque d'engin nautique |
US4730568A (en) * | 1987-02-13 | 1988-03-15 | Campbell Brian C | Waterborne craft |
FR2633242A1 (fr) * | 1988-06-27 | 1989-12-29 | Giffard Laurent | Planche a voile dont le support pour les pieds est monte sur amortisseurs |
US5018468A (en) * | 1989-04-28 | 1991-05-28 | Peterson Steven R | Multiple position footstrap track for sailboards |
FR2652331A1 (fr) * | 1989-09-25 | 1991-03-29 | Boucher Jose | Transfert de motricite pour planche a voile. |
-
1990
- 1990-03-02 FR FR9002643A patent/FR2659057A1/fr active Granted
-
1991
- 1991-04-02 EP EP91907512A patent/EP0577595B1/fr not_active Expired - Lifetime
- 1991-04-02 WO PCT/FR1991/000258 patent/WO1992017368A1/fr active IP Right Grant
- 1991-04-02 AT AT91907512T patent/ATE113018T1/de not_active IP Right Cessation
- 1991-04-02 ES ES91907512T patent/ES2065021T3/es not_active Expired - Lifetime
- 1991-04-02 US US08/122,587 patent/US5396856A/en not_active Expired - Fee Related
- 1991-04-02 DE DE69104733T patent/DE69104733T2/de not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO9217368A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE69104733T2 (de) | 1995-05-24 |
WO1992017368A1 (fr) | 1992-10-15 |
DE69104733D1 (de) | 1994-11-24 |
US5396856A (en) | 1995-03-14 |
FR2659057B1 (fr) | 1995-04-14 |
FR2659057A1 (fr) | 1991-09-06 |
ATE113018T1 (de) | 1994-11-15 |
ES2065021T3 (es) | 1995-02-01 |
EP0577595B1 (fr) | 1994-10-19 |
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