AU2019219755A1 - Surfboard fin having a rearwardly offset bearing surface - Google Patents

Surfboard fin having a rearwardly offset bearing surface Download PDF

Info

Publication number
AU2019219755A1
AU2019219755A1 AU2019219755A AU2019219755A AU2019219755A1 AU 2019219755 A1 AU2019219755 A1 AU 2019219755A1 AU 2019219755 A AU2019219755 A AU 2019219755A AU 2019219755 A AU2019219755 A AU 2019219755A AU 2019219755 A1 AU2019219755 A1 AU 2019219755A1
Authority
AU
Australia
Prior art keywords
edge
fin
arm
fin according
inclination
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
Application number
AU2019219755A
Other versions
AU2019219755B2 (en
Inventor
Xabi LAFITTE
Philippe Lopez
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.)
Maya
Original Assignee
Maya
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 Maya filed Critical Maya
Priority to AU2019219755A priority Critical patent/AU2019219755B2/en
Publication of AU2019219755A1 publication Critical patent/AU2019219755A1/en
Application granted granted Critical
Publication of AU2019219755B2 publication Critical patent/AU2019219755B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63BSHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B32/00Water sports boards; Accessories therefor
    • B63B32/60Board appendages, e.g. fins, hydrofoils or centre boards
    • B63B32/64Adjustable, e.g. by adding sections, by removing sections or by changing orientation or profile
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63BSHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B32/00Water sports boards; Accessories therefor
    • B63B32/60Board appendages, e.g. fins, hydrofoils or centre boards
    • B63B32/62Board appendages, e.g. fins, hydrofoils or centre boards characterised by the material, e.g. laminated materials; characterised by their manufacturing process

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Current-Collector Devices For Electrically Propelled Vehicles (AREA)
  • Wind Motors (AREA)
  • Toys (AREA)
  • Steering Devices For Bicycles And Motorcycles (AREA)
  • Motorcycle And Bicycle Frame (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

The invention relates to a fin for a surfboard, having a main body (12) which comprises a first edge (20) which is in contact with the board when said fin is secured to the board, a leading edge (22) at the front and a trailing edge (26) at the rear, a rear curve connecting the leading edge (22) and the trailing edge (26), the trailing edge (26) comprising a forwardmost front tip 5 (31), characterized in that the main body (12) is extended rearwards by an arm (14) which extends from a straight line which is perpendicular to the first edge (20) and passes through the front tip of the trailing edge (26), as far as the rear curve, said arm (14) having a length greater than approximately 8 cm. Figure 8

Description

SURFBOARD FIN HAVING A REARWARDLY OFFSET BEARING SURFACE
The present invention relates to a fin for a surfboard, as well as to a surfboard having such a fin.
Surfboards generally comprise, towards the rear of the board, one or more fins arranged in vertical planes, comprising, starting from the front, a leading edge forming a convex curve 5 which, as it descends, is inclined rearwards, and then a lower edge substantially forming a tip, and, rising again at the rear, the trailing edge, generally with a concave curve.
The fins constitute vertical planes which, in the longitudinal direction, cut through the water well to reduce drag and braking of the board and, in the lateral direction, offer high resistance, limiting transverse movement.
The surfer can thus control the trajectory of the board, by using his feet to give said board an orientation that will substantially constitute its direction of forward travel.
In general, fins of this type may be found on all types of surfboards for various sports which involve surfing the water.
The fins known in the prior art are relatively compact assemblies with little lateral flexibility, 15 which tends to limit under all circumstances the lateral drift of the rear part of the board.
Figure 2 shows a first fin 4 comprising a first edge 20 which is up against the underside of a board 2, forming the boundary with the anchoring portion 16.
Starting from the front of the first edge 20, there are, in succession, a leading edge 22 with a rearwardly inclined convex curve, a very short lower edge 24 which touches the horizontal 20 line H at one point, and then a trailing edge 26 of concave curvature which joins up with the first edge 20 at the rear.
There is a first axis of inclination 30, which runs from the centre 36 of the first edge 20 to the point of contact 28 between the lower edge 24 and the horizontal line H. A first angle of inclination 32 of this first axis of inclination is thus defined with respect to the axis 0° 25 perpendicular to the upper first edge, which in this example is 45°.
Figure 3 shows a second fin 4 which is shorter in the longitudinal direction. The convex curve of the leading edge 22 and concave curve of the trailing edge 26 are more pronounced. In this example, the first angle of inclination 32 of the first axis of inclination 30 is 27°.
11601097_1 (GHMatters) P105289.AU.1
2019219755 20 Aug 2019
Note that in these examples shown in Figures 2 and 3, the rear end of the fin 4 forms a rear tip 34 connecting the lower edge 24 and the trailing edge 26. For these types of fin 4, the first angle of inclination 32 of the main axis of inclination 30 rarely exceeds 45°.
Figures 4 and 5 show commercially available fins 4 comprising a main body 12 and a rear tip 5 34 projecting towards the rear of this main body 12, with a large height.
The main body 12 fits inside a main rectangle 40 comprising a short side which corresponds to the first edge 20 of the fin. A second angle of inclination 44 is defined, also called the 'sweep' angle, the angle made between the straight line passing through the middle 36 of the first edge 20 and the upper right-hand corner of the main rectangle 40, and the 10 perpendicular axis 0°.
The rear tip 34 fits inside a tip rectangle 46 which adjoins the main rectangle 40. A third angle of inclination 52 is defined, also called the 'rake' angle, the angle made between the perpendicular axis 0° and the straight line 48 passing through the rear end 38 of the first edge 20 and the middle 50 of the rear edge of the tip 34, which is in contact with the tip 15 rectangle 46.
For the fin shown in Figure 4, there is a second angle of inclination 44 of 17° and a third angle of inclination 52 of 40°.
For the fin shown in Figure 5, there is a second angle of inclination 44 of 17° and a third angle of inclination 52 of 35°.
For the fins shown in Figures 4 and 5, the rear tip 34 is somewhat bulky, and has a large height. However, this rear tip 34 directly attached to the main body 12 has a high rigidity in terms of lateral bending, such that the dynamic properties of the fin are quite poor.
The aim of the present invention is in particular to avoid these disadvantages of the prior art.
To this end it proposes a fin for a surfboard, which is designed to be secured, alone or along 25 with other fins, to the underside of the board, having a main body which comprises a first edge which is in contact with the board when said fin is secured to the board, a leading edge at the front and a trailing edge at the rear, a rear curve connecting the leading edge and the trailing edge, the trailing edge comprising a forwardmost front tip, characterized in that the main body is extended rearwards by an arm which extends from a straight line which is 30 perpendicular to the first edge and passes through the front tip of the trailing edge, as far as the rear curve, said arm having a length greater than approximately 8 cm.
11601097_1 (GHMatters) P105289.AU.1
2019219755 20 Aug 2019
According to the invention, the rear part of the arm forms a bearing surface which is spaced apart from the main body of the fin, which makes it possible to obtain maximum bending between the rear part of the arm and the main body of the fin, which is connected to the board and which is not very flexible. The fin according to the invention provides, when 5 coming out of a turn, a propulsion and acceleration effect. It is possible to modulate the bending of the arm by adjusting the length of the arm, the dimensions, the geometry and the shapes of the bearing surface(s) located at the rear of the arm. According to another advantage, the fin according to the invention makes it possible, owing to the speed and the inclination of the board induced by the surfer in the trajectory, to generate lateral twisting of 10 the arm up to the rear end thereof, along an axis perpendicular to the first edge and passing through the plane of the main body (i.e. perpendicular to the board), which increases control during the turn and which restores propulsion at the end of the trajectory when the surfer releases his weight.
Advantageously, the arm comprises a height reduction, the arm comprising at the rear of the 15 height reduction a bearing surface with a height greater than the height reduction. This feature enhances flexibility.
According to other features, the height reduction is between 2 and 4 cm and/or the bearing surface has a height of between 3 and 5 cm.
Advantageously, the bearing surface is separated from the board by a distance greater than 20 approximately 7 cm.
According to this feature, the bearing surface still performs the function of limiting the lateral drift of the board even when it is well out of the water, for example in jumps. Furthermore, this rear part separated from the board also makes it possible to chase the power of the swell at depth. According to this configuration, the rear part of the arm is 25 positioned outside the turbulence which occurs at the surface or along the board.
Preferably, the arm has a total length of between approximately 10 and 20 cm.
According to another feature, the arm comprises at least one wing at the rear.
Tests have shown that, as wings secured to the rear end of an arm have a degree of lateral flexibility, a dynamic reaction of these wings is obtained, which can give the board 30 propulsion at the end of a turn in small waves. It also provides better control of the trajectory in medium or strong waves, which provides greater reassurance for the surfer by virtue of the increases in speed provided by the fin.
11601097_1 (GHMatters) P105289.AU.1
2019219755 20 Aug 2019
The surfboard fin according to the invention may further comprise one or more of the following features, which may be combined with one another.
In particular, the fin may have a first angle of inclination formed between an axis of inclination passing through the centre of the first edge and through a central point of a lower 5 edge of the wing(s), and an axis perpendicular to the first edge, which is greater than substantially 45°.
In particular, the fin may have a second angle of inclination formed between an axis of inclination passing through the centre of the first edge and through a point of inflexion of the leading edge, and an axis perpendicular to the first edge, which is greater than 10 substantially 26°.
In particular, the fin may have a third angle of inclination formed between an axis of inclination passing through the rear end of the first edge and through the rearmost point of the rear curve, and the axis perpendicular to the first edge, which is greater than substantially 40°.
Advantageously, the horizontal rectangle starting from the perpendicular line drawn at the rear end of the upper edge, in which the arm and the wings fit, has a length to width ratio of greater than approximately 2. This configuration makes it possible to enhance the dynamic effect of the fin.
In particular, the fin may have a wing projecting downwards from the arm.
According to one embodiment, the fin comprises a wing which is inclined with respect to the plane of the main body of the fin.
The fin may comprise two wings arranged symmetrically with respect to the plane of the main body of the fin. This ensures a degree of resistance of the fin to vertical movements.
Moreover, the fin may comprise a third wing arranged in the plane of the main body of the 25 fin.
The invention also relates to a surfboard having at least one fin according to one of the preceding features.
Further features and advantages will emerge from the following description of the invention, given by way of example only, with reference to the accompanying drawings, in which:
- Figure 1 is a side view of a surfboard comprising a fin according to the invention positioned behind a fin according to the prior art;
- Figures 2 to 5 show criteria for measuring four fins according to the prior art;
11601097_1 (GHMatters) P105289.AU.1
2019219755 20 Aug 2019
- Figures 6 and 7 show criteria for measuring two fins according to the invention with a long length;
- Figure 8 shows criteria for measuring a fin according to the invention with a short length;
- Figures 9a and 9b show the reinforcement by fibres of a fin according to the invention;
- Figures 10, 11a and 12 schematically show three types of fins according to the invention as seen from the front, comprising a vertical single wing, an inclined double wing and a triple wing, respectively;
- Figures lib and 11c are side and top views, respectively, of the fin shown in
Figure 11a;
- Figures 13a, 13b and 13c are, respectively, a schematic view from the front, and drawings seen from the side and from the front, of a fin with an inclined wing;
- Figures 14a, 14b, 14c are, respectively, side, top and rear views of a fin with a 15 curved double wing;
- Figure 15 is a rear view of a fin with an inclined double wing;
- Figures 16a, 16b and 16c are, respectively, side, top and rear views of a fin with a flat double wing,
- Figure 17A is a side view of a fin designed to receive removable wings,
- Figure 17B is a top view of wings designed to be mounted on the fin shown in
Figure 17A,
- Figures 17C and 17D are front views of a fin having wings which are removable, in two configurations.
Figure 1 shows a surfboard 2 having a front end which is angled upwards so as to surf a 25 wave, and at the rear, in succession along the longitudinal axis, a fin 4 according to the prior art and a fin 10 according to the invention.
The fin 10 according to the invention comprises a front main body 12 which is extended upwards by an anchoring portion 16 which is inserted in the board so as to secure the fin, and has a lower edge extended rearwards by a substantially horizontal arm 14, ending in a 30 wing 18 projecting downwards from this arm.
11601097_1 (GHMatters) P105289.AU.1
2019219755 20 Aug 2019
All of the fins in the figures are shown upside down, with the upper and lower sides of these fins always referring to their position in operation, and not as they appear in these upside down drawings.
Figure 6 shows a fin 10 in which the leading edge 22 of the main body 12 is extended, after its convex curve, by a lower arm edge 60, which is substantially horizontal. The lower arm edge 60 is extended by a concave curve 62 before continuing through a substantially horizontal lower edge 24 of a wing 18, which is lower.
After the wing 18 is a convex curve, which ascends and continues through the upper arm edge 64, which is also substantially horizontal, before joining the trailing edge 26 at the rear 10 of the main body 12.
Thus, the same vertical plane contains the arm 14 forming a substantially straight structure which extends rearwards, attached to the base of the main body 12, and then the wing 18 descending below this arm, with relatively great lateral flexibility by virtue of the bending of the arm which supports it.
Figure 7 shows a fin 10 with a shorter arm 14 having a length which is reduced by approximately half with respect to the fin shown in Figure 6. To give an idea of size, the fin shown in Figure 6 has an arm with a length greater than or equal to about 50 cm (or 20 inches). The fin shown in Figure 7 has an arm with a length of less than or equal to about 25 cm (or 10 inches) and preferably between about 10 and 20 cm (about 4 and 8 inches).
As shown in Figure 7, with the rear end of the arm 14 being shifted rearwards and further away from the main body 12, bending is promoted along an axis substantially perpendicular to the first edge 20, contrary to the variants of the prior art shown in Figures 4 and 5 which had only a small bending capacity along an axis substantially parallel to the first edge 20. Such bending along an axis substantially perpendicular to the first edge 20 provides, when exiting a turn, a propulsion and acceleration effect.
Note that the first angle of inclination 32 is 65° for the fin shown in Figure 6 and 50° for that shown in Figure 7, which is greater than the limit of 45° which is not substantially exceeded in known fins 4.
Figure 8 shows a fin 10 with a second angle of inclination 44 of 27° and a third angle of 30 inclination 52 of 50°.
Thus, the ratio of the surface area of the rear part formed by the arm 14 and the wing 18, inscribed in its rectangle 46, to the surface area of the front main body 12 inscribed in its
11601097_1 (GHMatters) P105289.AU.1
2019219755 20 Aug 2019 rectangle 40, is 0.75, the ratio of the third angle of inclination 52 to the second 44 is 1.85, and the ratio of the horizontal side of the tip rectangle 46 to the vertical side thereof, is 2.
The fins 10 according to the invention may be produced by any known method, in particular by machining a blank, for example made of wood, or by moulding. It is possible in particular 5 to use composite materials comprising a reinforcement such as glass fibres, carbon fibres or synthetic linen fibres, and a matrix such as a polyester or epoxy resin.
The chosen materials are distributed according to a particular arrangement, in order to obtain the desired flexibility for each part giving the dynamic properties that it is desired to obtain from the fin.
In particular, it is possible to produce the fin from a shaped sheet of composite material, comprising glass fibres pre-impregnated with epoxy resin, enveloped in, as reinforcement, a glass fibre fabric with a density of 600 g/m2. After the whole is polymerized, a lightweight, very strong fin is obtained.
Figure 9a shows a fin 10 comprising carbon reinforcing fibres 70 inside the front main body 15 12, said fibres culminating in a tip which ends slightly above the lower edge. A degree of flexibility is obtained through this internal reinforcement.
According to another particular feature, in addition to being able to modulate the bending along an axis perpendicular to the first edge 20 thanks to the geometry of the fin, it is possible to modulate this bending by virtue of the nature of the materials used. Thus, Figure 20 9b shows carbon reinforcing fibres 72 forming, on either side, a horizontal strip placed on the outside, which extends over the entire length of the fin at the mid height of the arm 14.
Good lateral rigidity is obtained by means of these external reinforcements. By way of example, it is possible to thus rigidity fins with a very long arm so as to obtain a bearing surface which is very long and stiff. This particular feature makes it possible to increase the 25 capacity of the board to keep a straight line in very large waves.
Figure 10 shows a fin 10 comprising a single wing 18 in the same plane as the main body 12 of the fin.
Figures 11a, lib and 11c show a fin 10 comprising a double wing 18 with two downwardly inclined wings 80, forming a 'V' in front view.
Figure 12 shows a fin 10 comprising a triple wing 18 with two wings 82 positioned flat opposite one another, and a third wing 88 in the plane of the main body 12, oriented downwards.
11601097_1 (GHMatters) P105289.AU.1
2019219755 20 Aug 2019
The wings 18 shown in Figures 11a and 12 which comprise a horizontal component, give the board a degree of resistance in the vertical direction for keeping it in contact with the water.
Figures 13a, 13b and 13c show a fin 10 comprising a wing 90 in which the part arranged below the arm 14 is slightly inclined to the side with respect to the plane of the main body 5 12. The inclination in this example is 45° with respect to the vertical plane. In general, the inclination may be between 15 and 75°.
A number of particular dynamic effects are obtained, which may be sought with the board shown in the figures.
Figures 14a, 14b and 14c show a fin 10 comprising a double wing 18 with two wings 84 fixed 10 horizontally opposite one another at the base of the arm 14, and curved upwards and outwards. This fin design is more particularly suitable for boards for surfing standing up at front of the board ('nose riding').
Figure 15 shows a fin 10 comprising a double wing 18 with two wings 84 fixed opposite one another at the top of the arm 14, forming an upwardly open 'V'.
Figures 16a, 16b and 16c show a fin 10 comprising a triple wing 18 with two wings 82 fixed horizontally opposite one another at the base of the arm 14. The arm 14 arranged in a vertical plane is extended by a boss over part of the length of the wing 18, forming a third wing 88 oriented upwards.
The triple wing 18 thus has a resistance both in the vertical direction with the two horizontal 20 wings 82, and in the horizontal direction with the third wing 88.
Note that for this fin the edges of the arm 14 are rounded, the variable section of this arm narrowing towards the rear.
The horizontal wings provide a counter support at the rear of the surfboard that allows the surfer to position himself at the front of the board, surfing the face of the wave without 25 digging in.
Generally, different shapes of wings may be associated with an arm 14 of suitable length and flexibility in order to obtain a particular dynamic behaviour of the board tailored to the skill of the surfer and the sea conditions.
According to another variant shown in Figures 17A to 17D, the wings 18 are connected to 30 the rest of the fin in a removable manner. For this purpose, the arm 14 comprises a substantially horizontal slot 92 which is open towards the front of the fin. Complementarily, the wing 18 comprises a slot 94 made in a median position, which delimits two wings 96, 96',
11601097_1 (GHMatters) P105289.AU.1
2019219755 20 Aug 2019 and which is open towards the rear of the wing 18. The slots 92 and 94 are dimensioned in such a way as to allow the wing 18 to be assembled to the rest of the fin by nesting.
The wing 18 may be flat or V-shaped, the slot 94 being positioned at the base of the V.
According to this configuration, different wings may be successively secured to the same fin.
According to another advantage, the same wing 18 may be secured in different configurations, the edges of the wings 96, 96' may be oriented downwards as shown in Figure 17C or upwards as shown in Figure 17D.
According to a simplified variant, the wing 18 may be integrated into the arm 14.
Whatever the variant, the fin has a main body 12 which comprises a first edge 20 which is in contact with the board when the fin is secured to the board, a leading edge 22 at the front and a trailing edge 26 at the rear, a rear curve 27 connecting the leading edge 22 and the trailing edge 26. According to a feature of the invention, the main body 12 is extended rearwards by an arm 14 which extends from a straight line which is perpendicular to the first edge 20 and passes through the front tip of the trailing edge 26, as far as the rear curve 27, the arm 14 having a length L greater than approximately 8 cm (approximately 3 inches). Preferably, the length L is between 12 and 18 cm (approximately between 5 and 7 inches) in order to obtain a degree of flexibility suitable for the acceleration and driving of the board. The front tip of the trailing edge 26 corresponds to the rear tip 38 of the first edge 20 in the case of the variants shown in Figures 6 and 7. In the case of the variant shown in Figure 8, the front tip 31 of the trailing edge 26 is shifted towards the front with respect to the rear tip 38.
The length L of the arm corresponds to the dimension of the arm parallel to the first edge
20.
Thus, according to the invention, the rear part of the arm 14 forms a bearing surface connected by the arm 14 to the main body 12 and rearwardly offset, which makes it possible to obtain flexibility along an axis which is perpendicular to the first edge 20 and passes through the plane of the main body 12 (i.e. perpendicular to the board 2).
According to another feature, the arm 14 comprises a height reduction 33, the portion of the arm and/or the bearing surface 35 located to the rear of the height reduction having a 30 height greater than said reduction.
The height of the arm corresponds to the dimension of the arm perpendicular to the first edge 20.
11601097_1 (GHMatters) P105289.AU.1
2019219755 20 Aug 2019
Preferably, the height reduction is of the order of 2 to 4 cm. The bearing surface 35 has a height of between 3 and 5 cm greater than the height reduction.
Advantageously, the bearing surface 35 is separated from the board by a distance greater than approximately 7 cm.
In the presence of a height reduction, the leading edge comprises a point of inflection 29. A point of inflection corresponds to a point at which the leading edge crosses the tangent to the point of inflection. The leading edge 22 may comprise a straight portion, the leading edge having a convex curvature to the front of the straight portion and a concave curvature to the rear. In this case, the point of inflection corresponds to the front tip of the straight 10 portion.
Preferably, a straight line passing through the rear end 38 of the first edge 20 and the point of inflection 29 of the leading edge 22 is perpendicular to the first edge 20.

Claims (14)

1. Fin for a surfboard, designed to be secured, alone or along with other fins (4), to the underside of a board (
2), having a main body (12) which comprises a first edge (20) which is in contact with the board when said fin is secured to the board, a leading edge (22) at the front and a trailing edge (26) at the rear, a rear curve (27) connecting the leading edge (22) 5 and the trailing edge (26), the trailing edge (26) comprising a forwardmost front tip (31,
38), characterized in that the main body (12) is extended rearwards by an arm (14) which extends from a straight line which is perpendicular to the first edge (20) and passes through the front tip (31, 38) of the trailing edge (26), as far as the rear curve (27), said arm (14) having a length greater than approximately 8 cm.
10 2. Fin according to Claim 1, characterized in that the arm (14) comprises a height reduction (33), the arm (14) comprising at the rear of the height reduction (33) a bearing surface (35) with a height greater than the height reduction (33).
3. Fin according to Claim 2, characterized in that the height reduction (33) is between 2 and
4 cm.
15 4. Fin according to Claim 2 or 3, characterized in that the bearing surface (35) has a height of between 3 and 5 cm.
5. Fin according to one of Claims 2 to 4, characterized in that the bearing surface (35) is separated from the board by a distance greater than approximately 7 cm.
6. Fin according to one of the preceding claims, characterized in that the arm (14) has a 20 total length of between approximately 10 and 20 cm.
7. Fin according to one of the preceding claims, characterized in that the arm (14) comprises at least one wing (18) at the rear.
8. Fin according to the preceding claim, characterized in that it has a first angle of inclination (32) formed between an axis of inclination (30) passing through the centre (36)
25 of the first edge (20) and through a central point (28) of a lower edge (24) of the wing(s) (18), and an axis (0°) perpendicular to the first edge (20), which is greater than substantially 45°.
9. Fin according to one of the preceding claims, characterized in that it has a second angle of inclination (44) formed between an axis of inclination (42) passing through the
11601097_1 (GHMatters) P105289.AU.1
2019219755 20 Aug 2019 centre (36) of the first edge (20) and through a point of inflexion (29) of the leading edge, and an axis (0°) perpendicular to the first edge (20), which is greater than substantially 26°.
10. Fin according to one of the preceding claims, characterized in that it has a third angle of inclination (52) formed between an axis of inclination (48) passing through the point (38)
5 where the trailing edge (26) joins the first edge (20) and the rearmost point (50) of the rear curve (27), and an axis (0°) perpendicular to the first edge, (20), which is greater than substantially 40°.
11. Fin according to one of the preceding claims, characterized in that it comprises a rectangle, one of the sides of which coincides with a straight line which is perpendicular to
10 the first edge (20) and passes through a point (38) where the trailing edge (26) joins the first edge (20), in which the arm (14) and any wings (18) are inscribed, said rectangle having a length to width ratio of greater than approximately 2.
12. Fin according to one of the preceding claims, characterized in that it comprises a wing (90) which is inclined with respect to the plane of the main body (12).
15
13. Fin according to one of the preceding claims, characterized in that it comprises at least two wings (80, 82, 84, 86) arranged symmetrically with respect to the plane of the main body (12).
14. Fin according to Claim 13, characterized in that it comprises a third wing (88) arranged in the plane of the main body (12).
20 15. Surfboard having at least one fin according to one of the preceding claims.
AU2019219755A 2014-09-04 2019-08-20 Surfboard fin having a rearwardly offset bearing surface Active AU2019219755B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2019219755A AU2019219755B2 (en) 2014-09-04 2019-08-20 Surfboard fin having a rearwardly offset bearing surface

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US201462045799P 2014-09-04 2014-09-04
US62/045,799 2014-09-04
AU2015310758A AU2015310758A1 (en) 2014-09-04 2015-07-28 Surfboard fin having a rearwardly offset bearing surface
PCT/FR2015/052093 WO2016034784A1 (en) 2014-09-04 2015-07-28 Surfboard fin having a rearwardly offset bearing surface
AU2019219755A AU2019219755B2 (en) 2014-09-04 2019-08-20 Surfboard fin having a rearwardly offset bearing surface

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
AU2015310758A Division AU2015310758A1 (en) 2014-09-04 2015-07-28 Surfboard fin having a rearwardly offset bearing surface

Publications (2)

Publication Number Publication Date
AU2019219755A1 true AU2019219755A1 (en) 2019-09-05
AU2019219755B2 AU2019219755B2 (en) 2022-07-07

Family

ID=54105811

Family Applications (2)

Application Number Title Priority Date Filing Date
AU2015310758A Abandoned AU2015310758A1 (en) 2014-09-04 2015-07-28 Surfboard fin having a rearwardly offset bearing surface
AU2019219755A Active AU2019219755B2 (en) 2014-09-04 2019-08-20 Surfboard fin having a rearwardly offset bearing surface

Family Applications Before (1)

Application Number Title Priority Date Filing Date
AU2015310758A Abandoned AU2015310758A1 (en) 2014-09-04 2015-07-28 Surfboard fin having a rearwardly offset bearing surface

Country Status (6)

Country Link
US (1) US20170283016A1 (en)
EP (1) EP3188961B1 (en)
AU (2) AU2015310758A1 (en)
ES (1) ES2742153T3 (en)
PT (1) PT3188961T (en)
WO (1) WO2016034784A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2021269309B2 (en) * 2020-09-28 2024-02-29 Philip James Todd A watercraft manoeuvring device and a surface watercraft including the manoeuvring device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10800495B1 (en) * 2014-11-29 2020-10-13 Paul Thomas Enhanced planing devices and systems

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4320546A (en) * 1979-07-23 1982-03-23 Knox Carleton R Surfboard
NL8400891A (en) * 1983-03-25 1984-10-16 Graeme Scott Attey FIN, RUDDER, KILE OR SWORD FOR A VESSEL OR THE LIKE.
AU2013252141B2 (en) * 2012-04-23 2017-02-23 Felix WUNNER Fin for water sport and a surfboard for this purpose

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2021269309B2 (en) * 2020-09-28 2024-02-29 Philip James Todd A watercraft manoeuvring device and a surface watercraft including the manoeuvring device

Also Published As

Publication number Publication date
EP3188961B1 (en) 2019-05-15
PT3188961T (en) 2019-08-29
US20170283016A1 (en) 2017-10-05
EP3188961A1 (en) 2017-07-12
WO2016034784A1 (en) 2016-03-10
AU2019219755B2 (en) 2022-07-07
AU2015310758A1 (en) 2017-03-30
ES2742153T3 (en) 2020-02-13

Similar Documents

Publication Publication Date Title
US3747138A (en) Hydrofoil surfboards
AU2017267884B2 (en) Hydrofoil-based apparatus
US10160525B2 (en) Hydrofoil-based apparatus
AU2019219755B2 (en) Surfboard fin having a rearwardly offset bearing surface
US20170001695A1 (en) Fin Patent
US6106346A (en) Stabilizing fin for a water planing device
US20200094925A1 (en) Surfcraft Fin Arrangement
US6551157B1 (en) Water vehicle stabilizer and accelerator
US9669905B1 (en) Surfboard fin
US6746292B2 (en) Bottom fin for a watersports board
US20070259579A1 (en) Surfboard fin system
US9248892B1 (en) Stabilizing fin for a water planing device
US6718897B1 (en) Rideable wave propelled watersport board
US6767266B2 (en) Stabilizing element for use on mobile devices
AU2009214814A1 (en) Surfboard fin
US20220111936A1 (en) Watercraft manoeuvring device and a surface watercraft including the manoeuvring device
AU2017391759A1 (en) Channelled surfboard
US9738356B2 (en) Surfboard with an improved stringer
US10106230B2 (en) Biomimic design stabilizing fin or keel for surface planing or submerged watercraft
US20200047863A1 (en) Straightening effect sail
US9205898B2 (en) Fin structure for watercraft
US20080047477A1 (en) Boat hull and bait tank design
US5464358A (en) Airfoil jump ski
US20140048006A1 (en) Side force enhancer for planing objects
AU2021269309B2 (en) A watercraft manoeuvring device and a surface watercraft including the manoeuvring device

Legal Events

Date Code Title Description
MK4 Application lapsed section 142(2)(d) - no continuation fee paid for the application
TH Corrigenda

Free format text: IN VOL 35 , NO 8 , PAGE(S) 1139 UNDER THE HEADING APPLICATIONS LAPSED, REFUSED OR WITHDRAWN, PATENTS CEASED OR EXPIRED - 2019 DELETE ALL REFERENCE TO 2019219755.

FGA Letters patent sealed or granted (standard patent)