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WO2011057330A1 - Collerette d'aileron avec une surface de modification de fluide - Google Patents

Collerette d'aileron avec une surface de modification de fluide Download PDF

Info

Publication number
WO2011057330A1
WO2011057330A1 PCT/AU2010/001500 AU2010001500W WO2011057330A1 WO 2011057330 A1 WO2011057330 A1 WO 2011057330A1 AU 2010001500 W AU2010001500 W AU 2010001500W WO 2011057330 A1 WO2011057330 A1 WO 2011057330A1
Authority
WO
WIPO (PCT)
Prior art keywords
fin
collar
box
underside
slot
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.)
Ceased
Application number
PCT/AU2010/001500
Other languages
English (en)
Inventor
David John Russell Wood
Michael John Hort
Anthony Fontana
Eric Wolinski
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.)
Origin Fin Systems Pty Ltd
Original Assignee
Origin Fin Systems Pty Ltd
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
Priority claimed from AU2009905484A external-priority patent/AU2009905484A0/en
Priority to AU2012202985A priority Critical patent/AU2012202985A1/en
Application filed by Origin Fin Systems Pty Ltd filed Critical Origin Fin Systems Pty Ltd
Priority to BR112012010878A priority patent/BR112012010878A2/pt
Priority to CN2010800508926A priority patent/CN102666270A/zh
Publication of WO2011057330A1 publication Critical patent/WO2011057330A1/fr
Priority to US13/464,756 priority patent/US20120279436A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • B63B32/60—Board appendages, e.g. fins, hydrofoils or centre boards
    • B63B32/66—Arrangements for fixation to the board, e.g. fin boxes or foil boxes

Definitions

  • the present invention relates to a fin system.
  • the present invention relates to a fin system for use on surfboards.
  • the fin system may be applied to other watercraft such as kite boards, windsurfers and the like.
  • the fins are permanently fixed to the underside of a surfboard.
  • Such fixed fins, or “glassed in” fins utilise a fillet of fibre glass around the perimeter of the fin base which helps to stiffen the connection region between the fins and the board.
  • the permanent glassed in fins provide minimal water turbulence, reduced cavitation and laminar flow around the fin and surfboard interface, which results in increased tail lift during turning and planing, providing greater turning ability, speed and control. As such, glassed in fins are often preferred by serious and professional surfers.
  • the fillet connection between the fin and the underside of the surfboard increases the hydrodynamic properties of the board, as it reduces the water turbulence and cavitation in the region of the connection.
  • such traditional permanent fixation systems do not allow the surfer to readily change fins for different surf conditions, or remove the fins for transportation. Accordingly, during transportation the fins increase the overall thickness of the board at the tail end, making it difficult to transport multiple boards, and increasing the risk of damage to the surfboards.
  • the surfer intends to have boards which are set up for various different wave conditions, it is necessary to carry a selection of different boards.
  • the surfboard body When surfing, with conventional fixed fins, the surfboard body tends to be damaged if the fin impacts with an object such as a submerged rock or sand bar, as the fins are often snapped from the board resulting in damage to the adjacent region of the underside.
  • existing removable fins In contrast to permanent fins, existing removable fins generally provide a fin in which the base intersects the underside of the board at an angle which is close to perpendicular. This provides unfavourable hydrodynamic flow properties in the region where the base of the fin joins the underside of the surfboard, which can result in water turbulence, cavitation and reduced performance characteristics.
  • the present invention provides a fin collar comprising:
  • a body having a proximal region locatable adjacent to an underside of a water craft, and a distal region, the body including a longitudinally extending slot adapted to receive a watercraft fin, the slot extending through the body between the proximal and distal regions, wherein an outer surface of the body includes a fluid flow modification surface which extends around a perimeter of the body.
  • the fluid flow modification surface is preferably a fillet curve, such that when the collar is located on a fin, a tangent of the fillet curve at the distal region of the collar adjacent to the slot is substantially coincident with an adjacent region of the fin, and a tangent of the fillet curve adjacent to the underside of the water craft is substantially coincident with the underside of the water craft.
  • the proximal region is preferably laterally thicker than the distal region, such that when a fin is located in the slot, and the fin collar is located adjacent to a base of the fin, the fluid flow modification surface adjacent to the distal end is substantially coincident with an adjacent surface of the fin.
  • the body is preferably made from an elastically deformable material.
  • One or more projections preferably extend away from the proximal region, the projections being engageable with a fin box.
  • the fin collar preferably includes one or more tabs located at the proximal region, the tabs being adapted to be positioned under a base surface of the fin such that when the fin is fitted to a watercraft, the tabs inhibit the fin collar from being removed from the fin.
  • the outer surface of the body at the proximal region preferably includes one or more recesses adapted to provide access to a fastener for securing or removing the fin.
  • a trailing end of the collar is preferably open, such that the slot can be enlarged to permit a fin to be located within the slot.
  • the fin collar further preferably comprises a clasp defined by a first projection formed on a first side of the body, and a second projection formed on a second opposing side of the body, wherein when a fin is in engagement with the collar, the first and second projections each extend beneath a base of the fin and project away from the underside of the watercraft, to define a pair of fingers, each finger being located on an opposing side of the fin.
  • the fluid flow modification surface is preferably one of a chamfer, concave, convex, sawtooth, undulating, bulbous and stepping surface or combination of surfaces.
  • the collar is preferably manufactured by co-moulding or shrink fitting, and the collar is securable to a groove or channel formed in the fin.
  • One or more holes are preferably locatable in the fin to assist adhesion.
  • the present invention provides a fin system including a fin box adapted to be fitted to a watercraft and a fin,
  • the fin including a body with a base portion mountable to an underside of the watercraft, and a fin tip located at an opposing end of the fin, the base portion including a mounting tab and a skirt which extends away from the fin tip generally around a perimeter of the base;
  • the fin box including a longitudinally extending body having a receptacle adapted to receive the mounting tab, the body having an upper surface, a groove being formed in the upper surface, the groove being adapted to receive the skirt, and the groove being deeper than the skirt.
  • the fin preferably includes a fillet curve profile, which defines a reduction in thickness of the fin between the base portion and the body.
  • the fin box preferably includes a lower surface, the lower surface being generally parallel to the upper surface, and extending around the perimeter of the fin box, wherein a step extends between the upper surface and the lower surface.
  • the step is preferably chamfered.
  • One or more breaks are preferably formed in the skirt to provide access to a fastener receiving hole formed on the upper surface.
  • a recess is preferably formed in a wall of the receptacle, the recess being adapted to receive a projection of a fin collar.
  • the present invention provides a fin system including a fin box adapted to be fitted to a watercraft and a fin,
  • the fin box including:
  • a longitudinally extending receptacle having first and second fin box side walls and an opening, a first plane extending across the opening of the fin box and being generally coplanar with the surface of the watercraft in the vicinity of the fin box;
  • first fin box side wall a longitudinally extending first rib located on the first fin box side wall; and the fin including:
  • a body having a leading edge, a trailing edge, a first side face and an opposing second side face, the side faces extending between the leading and trailing edges, a second plane defined by and including the leading and trailing edges,
  • a base portion having a first side having a longitudinally extending first slot and a second side having a shoulder, a thickness of the base being greater than the thickness of the body, a fastener receiving hole extending through the base portion from the first side face to the second side face;
  • the base portion is insertable into the receptacle in a first position in which an acute angle is defined between the first and second planes, and the first rib is located in the first slot; and further wherein the fin is pivotable to a second position in which the first and second planes are generally perpendicular, the first rib remains located in the first slot and the shoulder is located in the receptacle;
  • a fastener is insertable into the fastener receiving hole to engage the shoulder and inhibit removal of the base portion from the receptacle.
  • the fastener receiving hole preferably extends diagonally, such that an entry to the hole is closer to a fin tip than an exit to the hole.
  • Fig. 1 is a schematic view showing a collar of the present invention being fitted to a fin having a base plate;
  • Fig. 2 is a schematic view showing a collar of the present invention being fitted to a fin without a base plate;
  • Fig. 3 is a schematic view showing a collar of the present invention being fitted to a fin from the underside;
  • Fig. 4 is a partial cross-sectional view showing a collar being secured to a fin with grub screws
  • Fig. 5 is a partial cross-sectional view showing a co-moulded collar
  • Fig. 6 is a top view depicting a two part collar in an open position
  • Fig. 7 is a top view depicting the two part collar of Rg. 6 in a closed position
  • Fig. 8 is a partial cross-sectional view showing an adhesive mounted two part collar
  • Rg 9 partial cross sectional view depicting a collar fitted to a fin
  • Rg. 10 is a top view of a collar according to an alternative embodiment
  • Rg. 11 is a bottom view of the collar of Rg. 10;
  • Fig. 12 is a bottom view of a set of three collars according to a still further embodiment
  • Rg. 13 is a top view of the set of three collars according to Rg. 12;
  • Rg. 14 is a top view of a collar of an alternative embodiment
  • Fig. 15 is a top view of a two part collar of an alternative embodiment
  • Fig. 16 is an end view showing a plurality of different collars having differently shaped water contact surfaces;
  • Rg. 17 depicts a two part collar being fitted to a fin having a base plate;
  • Rg. 18 is a partial cross-sectional view of the collar of Rg. 17 fitted to a fin;
  • Rg. 19 is a perspective view of a fin box
  • Rg. 20 is a side cross-sectional view of the fin box of Rg. 19;
  • Rg. 21 is an end cross sectional view of the fin box of Rg. 19;
  • Rg. 22 is an end view of the fin box of Rg. 19;
  • Rg. 23 is side view of a collar
  • Rg. 24 is a side view of a fin
  • Rg 25 is a perspective underside view of the fin of Rg. 25;
  • Rg. 26 is a cross sectional view of the fin box of Rg. 19, adapted to receive a fin mounted on an angle;
  • Rg. 27 is a rear perspective detail of a fin tab
  • Fig. 28 is a front perspective view of the fin tab of Rg. 27;
  • Rg. 29 is a schematic view showing the fin table of Rg. 27 being secured to a fin box with a grub screw;
  • Rg. 30 is a top view of a fin box of a further embodiment
  • Rg. 31 is a partial cross-sectional side view of the fin box of Rg. 30 with a fin fitted;
  • Rg. 32 is a partial cross sectional side view of the fin and collar of Rg. 12;
  • Rg. 33 is a partial perspective view showing the collar of Rg. 5 mounted to a fin.
  • Rg. 34 is a collar and fin assembly of a further embodiment.
  • a fin system 20 including a fin box 100 and a fin 40 for use on a watercraft such as a surfboard 60 is described herein.
  • the fin system 20 includes a collar 70 which provides a hydrodynamic adaptor between the underside of the surfboard 60, and the fin 40.
  • the collar 70 is shown schematically in Rgs. 1 and 2 being fitted over a fin 40.
  • the collar 70 is initially pushed over the tip 42 of the fin 40, and pushed toward the underside of the surfboard 60 until the collar 70 is located at the base 44 of the fin 40, adjacent to the underside of the surfboard 60.
  • each embodiment of the collar 70 provides different mounting methods, to suit various fin boxes.
  • Each embodiment of the collar 70 alters the flow of water in the interface region between the surfboard and the fin, to provide favourable hydrodynamic performance conditions to the surfer.
  • the collar 70 has a body 72 and a longitudinally extending central aperture or slot 74.
  • the slot 74 is designed to generally correspond with the size and shape of the fin 40 at the base 44 of the fin 40.
  • the collar 70 may be manufactured from an elastically deformabie material, such as a rubber compound, or alternatively a more rigid plastic or fibre glass.
  • the central aperture 74 defines a flange or lip which is smaller than the fin 40 at the base 44, such that the collar 70 is designed to stretch to correspond with the base 44.
  • the collar 70 may be fitted over the fin 40 by sliding over the tip, or placing it under the base prior to installation of the fin 40.
  • the collar 70 body 72 has an outer, perimeter which has a surface 75 which provides increased hydrodynamic properties.
  • the surface 75 is generally provided having a fillet curved profile. However, other suitable profiles such as chamfered or angled may be applied to the surface 75. As shown in Fig. 16, the surface 75 may be a chamfer as shown in example 1, a less curved chamfer as example 2, a straight fillet, with a step as per example 3, a bulbous, convex profile as per example 4, or various stepping or sawtooth, scalloped or undulating profiles as shown in examples 5 to 8.
  • the fillet curved surface 75 provides a smooth transition between the underside of the surfboard 60 and the fin 40 body. Accordingly, a tangent of the fillet curved surface 75 at an upper portion of the collar 70 adjacent to the slot 74 is substantially coincident with an adjacent region of the fin 40. In addition, a tangent of the fillet curved surface 75 adjacent to the underside of the surfboard 60 may be substantially coincident with the underside of the surfboard 60.
  • the collar 70 includes one or more projections 76. The projections 76 are received by a fin box 100, which is discussed in detail below.
  • the collar 70 includes one or more threaded through holes 80.
  • the holes 80 enable fasteners such as grub screws 82 to be screwed through the holes 80 and driven into abutment with the side walls of the fin 40, or into the fin box 100.
  • the grub screws 82 are depicted being fastened with a hand held tool, such as a hex key.
  • a cavity 84 is provided between the collar 70 and the underside of the surfboard 60. Adjacent to the cavity 84 a skirt 86 extends around the perimeter of the collar 70. The skirt 86 abuts directly against the underside surface of the surfboard 60, and the skirt 86 may be flexible or rigid and provides good contact between the surfboard and 60 and collar 70. In an alternative embodiment depicted in Fig. 26, the base of the skirt 86 is received in a groove formed in the fin box 100.
  • the underside of a surfboard 60 It is common for the underside of a surfboard 60 to have a slightly convexed contour between the tip and tail of the surfboard 60 in the vicinity of the fins 40.
  • the flexible material characteristics of the collar 70 enable the underside of the collar 70 to adopt a slightly concaved profile to closely follow the contour surface of the surfboard 60.
  • the collar 70 does not provide any structural support to the fin 40.
  • the collar 70 is designed to correspond with the shape of a standard FCSTM style fin system 20.
  • the slot 74 includes enlarged portions 77 which receive the mounting tabs 46 on base of the FCSTM style fins.
  • the lips 79 sit under the base of the fin 40, and the lips 79 are narrower than the width of the fins 40 at the base. Accordingly, the lips 79 become compressed between the fin box 100 and the base of the fins 40, thereby inhibiting removal of the fins 40.
  • the collar 70 may be either placed over the tip of the fin 40 and slid downwardly, or alternatively, the collar 70 may be placed under the base of the fin 40, prior to securing the fin 40 to the surfboard 60.
  • the collar 70 is in the form of two opposing collar halves 92, 94. Each collar half 92, 94 is placed on an opposing side of the fin 40.
  • the collar halves 92, 94 may be secured to one or both of the underside of the surfboard 60 and the base of the fin 40 with double sided tape, or another suitable adhesive such as hook and loop fasteners or glue.
  • the fin 40 has a notch or channel 98 formed in each of the side walls.
  • the notches 98 extend, between the leading and trailing ends of the fin 40.
  • the inner wall of the collar 70 is grafted, infused, co-moulded, shrink fitted or otherwise attached to the notch 98.
  • the notch 9.8 inhibits removal of the collar 70 from the fin 40.
  • Rg. 34 depicts a similar embodiment, in which the two sides of the collar are secured to the fin 40 by way of the holes 49 which are formed in the fin. The holes 49 permit adhesive or a portion of the collar 70 when heated to flow into the holes 49, resulting in higher bond strength.
  • the collar 70 does not surround the full perimeter of the fin 40.
  • the collar 70 is located at the leading edge of the fin 40 having the most impact on the hydrodynamic properties of the fin 40, and the collar 70 extends along the sides of the fin 40 toward the trailing end. Accordingly, the collar 70 has a generally U-shaped profile.
  • the collar 70 is adapted to be opened during installation, to facilitate easy securing to the surfboard 60 and fins 40.
  • the collar 70 has two sides 200, 202.
  • the sides 200, 202 are connected together with either a clip or a permanent hinge 204.
  • this connector utilises a male hook shaped projection 230 on one of the sides 202 and a corresponding female shaped groove 232 on the other side 200. This enables the sides 200, 202 to snap together around the fin.
  • the sides 200, 202 are secured to the surfboard 60 with grub screws or another suitable fastener.
  • Rgs the embodiment of Rgs.
  • flanges or tabs 210 which are seated beneath the fin 40.
  • the flanges 210 are configured to be located in between and in front or behind the fin mounting tabs provided with FCSTM style fins.
  • the tabs 210 prevent the collar from being unintentionally removed from the surfboard 60.
  • the sides 200, 202 are closed around the fin 40, about the clip or permanent hinge 204.
  • the tabs 210 are beneath the base of the fin 40, and the tabs 210 prevent the collar 70 from being moved away from the underside of the surfboard 60.
  • the two sides of the collar 70 may be integrally formed such that the collar 70 has a generally "U"-shaped profile.
  • the collar material is resilient which enables the trailing end of the collar 70 to be opened to attach it around the base of the fin 40.
  • a fastener such as a grub screw or a pin or a clip 220 is used to connect the two ends of the collar 70 around the fin.
  • a clasp in the form of a first projection 232 formed on the first side 200, and a second projection 234 formed on the second side 202.
  • the projections 232, 234 each extend beneath the base of the fin 40 and project away from the underside of the surfboard 60, to define a pair of fingers 236, 238.
  • the fingers 236, 238 are shown as a detail in Rg. 32, and they prevent the trailing end of the collar 70 from being separated away from the fin, and as such, the fingers 236, 238 lock the collar 70 in position around the fin 40.
  • each finger 236, 238 engages with the opposing side of the fin 40, having the effect of pulling the two sides 200, 202 of the collar 70 together.
  • the collar 70 may be held in place simply by the fact that it is bounded by the surf board 60 and the underside and base edges of the fin 40. As such, there is no need to use fasteners such as grub screws to hold the collar 70 in position. As shown in Rg. 13, the collar 70 has holes or apertures 250.
  • the apertures 250 correspond in placement with the mounting screws which are used to remove or tighten the fin 40 within the fin box 100. Accordingly, during installation, the collar 70 is initially placed beneath the base of the fin 40, and the fin 40, with one step 236, 238 on either side of the fin 40. The fin 40 is then placed in the fin box. A hex key or other such fastening tool is inserted through the apertures 250, and the hex key is used to engage grub screws in the fin box.
  • the apertures 250 may be elongate to accommodate variations in the placement of the grub screws in the fin box 100.
  • Fig. 34 discloses an embodiment in which the fin 40 has a base plate 47. The base plate 47 is used to hold and secure the collar 70.
  • the base plate 47 includes two or more protrusions 300, which fit into corresponding recesses 302 formed in the underside of the collar 70.
  • a hole 305 is formed in the collar 70, and a fastener such as a grub screw which is inserted into the hole passes through a
  • the base plate 47 may be secured to the fin box 100 with adhesive prior to mounting the collar 70.
  • the steps 236, 238 obviate the need for a grub screw or other such mounting system at the trailing end of the fin 40.
  • Figs. 19 to 22 show a fin box 100 for mounting to the underside of a surfboard 60.
  • the fin box 100 includes one or two slots 102.
  • the slots 102 receive mounting tabs 46 which extend away from the base of a typical FCSTM style fin.
  • a grub screw receiving hole 104 is formed on either side of the fin box 100, adjacent to one of the slots 102.
  • On an opposing side of each slot 102 relative to the grub screw receiving hole 104 is a recess 106, which is formed in the side wall of the slot 102.
  • the recess 106 is adapted to receive the projection 76 of the collar 70.
  • Figs. 19 to 22 show that the fin box 100 has a base surface 110, and a raised surface 112 raised above the base surface 110.
  • a groove 114 is formed in the raised surface 112, and the groove 114 has a shape which corresponds to the outer profile of the base of the fin 40, or collar 70.
  • the fin box 100 may be embedded in the underside of the surfboard 60. Fibre glass and resin is laid over the base surface 110. Accordingly, surface 110 is subsequently located beneath the outer fibre glass surface of the surfboard 60, and the fibre glass and resin helps to keep the fin box 100 in position.
  • the underside of the surfboard 60 has a slight convex curved formed in it which varies slightly in different types of surfboards 60.
  • the raised surface 112 is initially flat, and is sanded to correspond with the convex contour on the underside of the surfboard 60. This typically means that the sanding difference between the highest and lowest points is around lmm.
  • the installed fin box 100 is depicted in Fig. 26.
  • the groove 114 is sufficiently deep that even after the raised surface 112 is partially sanded back, (especially in the vicinity of the leading and trailing ends), there is still a groove 114 extending a majority of the way around the perimeter of the fin 40.
  • the fin 40 of this embodiment has an integrally formed fillet curved base 120, and the underside of the fin 40 has a perimeter skirt or flange 122 which has the same general shape as the groove 114.
  • T e perimeter skirt 122 may be between 1 and 20mm deep. In the preferred embodiment, the perimeter skirt is aboi_rt?2mm deep.
  • the groove 114 has a depth which is larger than the perimeter skirt 122, typically 2-3mm. Advantageously, this creates a buffer zone for sanding the underside of the surf board 60. The sander does not need to worry about the exact depth that he sands down to.
  • the underside of the fin 40 has a concave hollow which helps accommodate any discrepancies in the levels once the fin box 100 is installed.
  • the fin box 100 is installed, and covered with tape or a lid.
  • the fin box 100 is then set into the board with a laminate resin and fibre glass cloth is applied over the top with a laminate resin.
  • the perimeter skirt 122 may extend all around the complete perimeter of the fin 40.
  • the perimeter wall 122 may have a break corresponding to the positions of the grubs screw receiving holes 104.
  • the underside of the fin 40 has a sight concave curve to match the underside convex curve in the surfboard 60. This typically accounts for a 0.2 to 2mm difference in height between a leading edge of the fin 40, and a central, underside region of the fin 40.
  • the fin system of this embodiment enables adjustment of the positioning of the fin box 100 by simply sanding away the excess raised surface 112. This reduces the need for accuracy when installing the fin boxes 100, and hence assists in speeding up the surfboard 60 making process.
  • Fig 20 represents a partial cross sectional view of the fin box 100. As can be seen in that figure, there is an angled chamfer transition between the base surface 110 and the raised surface 112. As shown in Figs. 19 to 22, the fin box 100 has a generally elliptical outer shape.
  • the mounting ta 46 receiving slots may be in a double formation, for mounting typical FCSTM style fins 40. Alternatively, a single channel may be provided, for standard single tab. Also a single tab may be used for mounting FUTURETM style fins 40.
  • the elliptical profile reduces stress cracking in the adjacent fibre glass of the surf board 100.
  • Figs. 29 to 31 show an alternative embodiment of a fin 40.
  • the grub screw receiving holes 104 are formed in the fin 40, rather than the fin box 100. This is advantageous because if the threads formed in the grub screw receiving holes 104 are damaged in some way, it is only necessary to replace the fin 40, rather than install a new fin box 100, which is a complicated process, requiring the surfboard 60 to be out of action for a considerable period of time.
  • Fig. 29 is an end sectional view of the fin 40 positioned within a corresponding fin box 100.
  • the grub screws 82 pass diagonally downwardly from one side of the fin 40, and emerge on the opposing side of the fin 40 at the base 44.
  • the mounting tabs 46 of the fin 40 of this embodiment have a first side 130 (being the same side as the head of the grub screw 82) and a projection 133 is formed on the fin box 100, for engaging with a channel 135 formed in the base of the fin 40.
  • the opposing second side screws 82 project away from the mounting tabs 46 and engage with channels 137 formed on the fin box 100.
  • the fin box 100 may be used with proprietary fins 40, as depicted in Figs. 27, 28.
  • the box 100 is versatile and may be used with other brand fins 40 such as FCSTM or RAPTORTM.
  • FCSTM style fins 40 the mounting tabs 46 are partially received in the slots 180.
  • grub screws are received in the holes 182.
  • a plate having a generally elliptical body is placed over the box 100, and the elliptical body has two generally rectangular holes for receiving the mounting tans 46 of the fin.
  • Fig. 30 shows a fin box 100 which is installed in the base of the surfboard 60 after sanding of the underside of the board 60.
  • the base of the fin 40 sits slightly above the perimeter of the fin box 100, and a smooth transition is achieved by applying a light strip of resin around the edges of the fin box 100.
  • the resin may be rounded, concaved or chamfered, or another suitable profile.
  • the existing grub screws which are employed in FCSTM and FutureTM style fin systems to mount the fins to the board can also be modified to include a set of smaller grub screws which screw into the heads of the existing grub screws.
  • the smaller grub screws 222 are used to mount the collar 70 to the board 60, and this obviates the need to make any modifications to the structure of the board 60 or fin box 100.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Connection Of Plates (AREA)
  • Prostheses (AREA)

Abstract

L'invention porte sur une collerette d'aileron, qui comprend un corps comportant une région proximale qui peut être disposée au voisinage d'une face inférieure d'un navire. La collerette d'aileron comprend également une région distale, le corps comprenant une fente s'étendant longitudinalement adaptée pour recevoir un aileron de navire, la fente s'étendant à travers le corps entre les régions proximale et distale. Une surface externe du corps comprend une surface de modification d'écoulement de fluide qui s'étend autour d'une périphérie du corps.
PCT/AU2010/001500 2009-11-10 2010-11-10 Collerette d'aileron avec une surface de modification de fluide Ceased WO2011057330A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AU2012202985A AU2012202985A1 (en) 2009-11-10 2010-10-21 Fin system
BR112012010878A BR112012010878A2 (pt) 2009-11-10 2010-11-10 anel de quilha com uma superfície de modificação fluida
CN2010800508926A CN102666270A (zh) 2009-11-10 2010-11-10 具有流体改性表面的鳍状物套环
US13/464,756 US20120279436A1 (en) 2009-11-10 2012-05-04 Fin system

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
AU2009905484A AU2009905484A0 (en) 2009-11-10 Fin system
AU2009905484 2009-11-10
AU2010900949A AU2010900949A0 (en) 2010-03-08 Fin system
AU2010900949 2010-03-08

Related Child Applications (2)

Application Number Title Priority Date Filing Date
AU2012202985A Division AU2012202985A1 (en) 2009-11-10 2010-10-21 Fin system
US13/464,756 Continuation-In-Part US20120279436A1 (en) 2009-11-10 2012-05-04 Fin system

Publications (1)

Publication Number Publication Date
WO2011057330A1 true WO2011057330A1 (fr) 2011-05-19

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2010/001500 Ceased WO2011057330A1 (fr) 2009-11-10 2010-11-10 Collerette d'aileron avec une surface de modification de fluide

Country Status (4)

Country Link
US (1) US20120279436A1 (fr)
CN (1) CN102666270A (fr)
BR (1) BR112012010878A2 (fr)
WO (1) WO2011057330A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
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US9751600B2 (en) 2015-07-02 2017-09-05 David Elliott Finbox for multiple fin systems
AT521490B1 (de) * 2018-09-13 2020-02-15 Firefin Gmbh Wassersportgerät und Finnenanordnung mit einer wechselbaren Finne

Families Citing this family (8)

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