EP0188170A1 - Release means for sailboard footstraps - Google Patents
Release means for sailboard footstraps Download PDFInfo
- Publication number
- EP0188170A1 EP0188170A1 EP85630210A EP85630210A EP0188170A1 EP 0188170 A1 EP0188170 A1 EP 0188170A1 EP 85630210 A EP85630210 A EP 85630210A EP 85630210 A EP85630210 A EP 85630210A EP 0188170 A1 EP0188170 A1 EP 0188170A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- members
- arrangement according
- release
- release arrangement
- female
- 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
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- 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
- B63B32/77—Arrangements for fixation of accessories to the board, e.g. inserts or rails
Definitions
- This invention relates to release means for a safety strap or the like, and is particularly applicable to sailboards and, more specifically, to the type of sailboards known as "wavejumpers".
- Wavejumper sailboards are generally provided with footstraps in the form of loops, the ends of which are secured to the board in an area aft of the mast coupling, close to the tail of the board.
- the footstraps are normally located on the longitudinal axis of the board, so that a rider may stand on either side of the sail, but on some boards there may be side straps. Footstraps are invaluable in the wavejumper type of sailboard, as the sailing of such a board often involves manoeuvres in which the board is out of the water at various steep angles, and the rider's feet would often lose contact with the board if they were not located in footstraps.
- footstraps do not include release mechanisms. There are often occasions when a sailboard rider can be injured by a sailboarding mishap, during which he has not been able to extract his feet from footstraps.
- the female member includes spring means having a latch supported therein, which, latch co-operates with features on the male member.
- latch co-operates with features on the male member.
- US-A-3,704,633 discloses a keeper component fabricated from a plurality of juxtaposed metal plate members. The members have recesses therein for receiving a spring-loaded ball which is adapted to engage an aperture in a removable latch member. When a force above a particular value is exerted upon the latch, detent action between the ball and the latch member aperture is broken, and the latch is released.
- US-A-3,704,633 The arrangement of US-A-3,704,633 is described in its application to a release assembly for a dog leash, and is unsuitable for use in a sailboarding context.
- the invention provides a release arrangement for a sailboard footstrap, consisting of a first member and a second member provided with engagement means which enable said members to remain engaged until particular forces acting on the arrangement cause the disengagement of said members, characterized in that said members are provided with release elements to enable one or more release modes to operate in response to forces of different magnitudes applied to said arrangement in different directions.
- FIGURE 1 shows a footstrap arrangement 10, for attachment to a sailboard (not shown). Normally there can be up to five footstraps on a wavejumper sailboard, all of which may take the form of the footstrap 10.
- the footstrap 10 includes a strap 12, preferably formed from polypropylene sheet material 13, with or without a portion of seat belt webbing 15 attached to its lower surface. Strap 12 has apertures 14,16, and 18,20 for attachment to the sailboard and female release means member 22 respectively.
- a clamping plate 24 with apertures 26,28 is used to attach first end 30 of strap 12 to a sailboard upper surface.
- the plate 24 is preferably moulded from nylon or acetal plastics material. Screws 32,34, preferably stainless steel self-tapping screws, pass through apertures 24,18 and 28,20 respectively into plastic plugs (one of which is denoted in FIGURE 7 by reference numeral 36) glued or otherwise secured into the sailboard cove.
- Female release means member 22 consists of two identical components 38,40, the former of which is also shown in detail in FIGURES 2, 3 and 4.
- Components 38,40 are preferably formed from hard grade injection moulded urethane elastomer.
- the component 38 has a generally rectangular shape, with one curved end 42.
- the inner face 44 has a recessed portion 46, which has an aperture 48 therein, with a chamfered portion 49 adjacent to recessed portion 46.
- the aperture may be frusto-conical in configuration.
- a locating pin 52 extends from one side of recessed portion 46, and there is a locating aperture 54 on the other side of the portion.
- Connection apertures 56,58 extend from outer face 50 to inner face 44.
- Aperture 56 has a chamfer 62
- aperture 58 has a recessed hexagonal portion 64 to accommodate a hexagonal nut 66, which in the assembled member 22 engages with bolt 68.
- Bolt 70 extends through aperture 56 to engage with hexagonal nut 72.
- Component 40 has features 142, 144, 146, 148, 149, 150, 152, 154, 156, 158, 160, 162 and 164 inclusive (most of which are shown in FIGURE 1) identical respectively to the features denoted by reference numerals 42, 44, 46, 48, 49, 50, 52, 54, 56, 58, 60, 62 and 64 in relation to component 38.
- a thin packing piece 118 (or a plurality of such pieces) may be used to increase the distance between components 38,40 when they are assembled into female member 22 and attached to second end 31 of strap 12. Packing piece 118 has apertures 120,122 therein.
- components 38 and 48 are advanced towards each other, until pin 52 enters aperture 154, and pin 152 enters aperture 54. If a packing piece 118 is used, it is placed between surfaces 44 and 144, as is end 31 of strap 12. Apertures 56, 16, 120 and 158 are then placed in register, bolt or screw 70 is inserted therein, and is tightened on nut 72 which is located in recessed portion 164. Apertures 58, 14, 122 and 156 are also in register, and bolt or screw 68 is inserted therein, to be tightened on nut 66 located in recessed portion 64.
- Male member 74 also shown in FIGURES 5 and 6, has a first portion 76 in which a narrow slot 78 is provided, for the attachment of a loop 80 of seat belt webbing or the like.
- a second portion 82 extends from the first portion, with tapering sides 84,86.
- On one surface 88 of second portion 82 is a frusto-conical boss 90, and on the other surface 92 of second portion 82 is a registering frusto-conical boss 94.
- Component 74 is preferably injection moulded from an acetal plastic.
- Loop 80 has apertures 96,98 in a first, upper portion 100, and registering apertures (not shown) in a lower portion 102.
- a clamping plate 104 which is identical to previously described clamping plate 24.
- Plate 104 has apertures 106,108, which register with apertures 96,100 and through which screws 110,112 (preferably stainless steel self-tapping screws) pass into plastic plugs (one of which 114 is shown in FIGURE 7) attached to the sailboard core material 116.
- male member 74 is pushed into the aperture between portions 46,146 of female member 22.
- Bosses 90,94 are pushed into notches 150,50 respectively, which aids in spreading portions 46,146 apart, thereby easing the male member 74 into the female member 22.
- the portions 46,146 at least should be formed from a slightly resilient material, such as that previously mentioned. With the portions 46,146 deformed outwardly, the male member can seat in the aperture between the portions 46,146, with bosses 90,94 being captive in apertures 148,48 respectively, portions 46,146 resuming their normal positions.
- FIGURE 7 shows a preferred footstrap mounting arrangement 10 in section, with the various components of FIGURES 1 to 6 assembled into an "in-use" situation.
- the sailboard skin typically plastic or fibreglass cloth and polyester resin, is denoted by 124.
- a cover 126 is also shown.
- the cover 126 consists of a neoprene sheet portion 128 wrapped around strap arrangement 10 and secured by a portion 130 of Velcro (Registered Trade Mark) material.
- bosses 90,94 are frusto-conical, and the edges of apertures 48,148 are chamfered (49,149). With sufficient force in the direction of the arrow, the bosses 90,94 will climb out of apertures 48,148, and will spread components 38,40 of member 22 apart, enabling male member 74 to withdraw female member 22. This first release moment would operate for example, when a sailboard/wavejumper became airborne, and thereafter entered the water tail first.
- FIGURES 8 and 9 show the second release mode. This second mode operates when a relatively rotating force is applied to members 22,74, for example when the rider falls forward or backward.
- wall 84 of member 74 co-operates with pin 52, (FIGURE 8) or wall 82 co-operates with pin 152 in lever-type actions to lever bosses 90,94 from sockets 48,148.
- a third release mode operates where there is relative twisting of elements 22,74 that is, relative rotation about their common longitudinal axis. This may occur when a rider's foot twists in the strap 12.
- the relative twisting forces recessed portions 46,146 apart, allowing bosses 90,94 to leave apertures 48,148 thus allowing male member 74 to leave female member 22.
- the force at which this mode operates can be varied, as stated hereinbefore, by the inclusion or omission of one or more packing pieces(s) 118.
- a fourth release mode which is similar to the first mode, caters for the situation when there is excessive lateral pressure on the strap arrangement 10. This may occur when the rider's foot slides sideways along the longitudinal axis of the sailboard, usually in a forward direction, in FIGURE 7 from right to left. This usually occurs after the sailboard has become airborne; upon landing it enters the water with its nose pointing downwards at an excessively steep angle. As a result the board comes to a sudden stop, causing the rider to move forward relative thereto.
- the release means With the motion of the foot in the direction indicated, the release means "springs" open, under the influence of the force which is in the indicated direction.
- each of the four release modes there is a separate varying predetermined force at which each mode will operate.
- the buckle's three modes cater for all types of sailboarding mishaps, and ensure that a rider's feet cannot be trapped in footstraps if a mishap occurs.
- Some exemplary release mode operational weights may be 50 kg to 100 kg for the first mode, and 5.44 kg for mode two.
- adjustment for various foot sizes may be made by adjusting the length of the strap 12, by providing a number of mounting holes therein, by a Velcro (Registered Trade Mark) type connection, or in any other manner.
- Velcro Registered Trade Mark
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
- Buckles (AREA)
Abstract
Description
- This invention relates to release means for a safety strap or the like, and is particularly applicable to sailboards and, more specifically, to the type of sailboards known as "wavejumpers".
- Wavejumper sailboards are generally provided with footstraps in the form of loops, the ends of which are secured to the board in an area aft of the mast coupling, close to the tail of the board. The footstraps are normally located on the longitudinal axis of the board, so that a rider may stand on either side of the sail, but on some boards there may be side straps. Footstraps are invaluable in the wavejumper type of sailboard, as the sailing of such a board often involves manoeuvres in which the board is out of the water at various steep angles, and the rider's feet would often lose contact with the board if they were not located in footstraps.
- One disadvantage of conventional footstraps is that they do not include release mechanisms. There are often occasions when a sailboard rider can be injured by a sailboarding mishap, during which he has not been able to extract his feet from footstraps.
- US-A-3,675,282 to Summers et al describes a mechanical fuse for linking two members together such that separation forces exceeding a particular value cause the male and female members constituting the fuse to separate.
- The female member includes spring means having a latch supported therein, which, latch co-operates with features on the male member. When the separation force exceeds the particular value the spring means is deformed, the engagement between the latch and the male member is broken, and the members separate.
- Such an arrangement is described in its application in the packaging of emergency escape slides in aircraft, and is not suitable for use as a release device for sailboards and the like. The arrangement of US-A-3,675,282 is also too complex in construction to be useful in a sailboarding context.
- US-A-3,704,633 discloses a keeper component fabricated from a plurality of juxtaposed metal plate members. The members have recesses therein for receiving a spring-loaded ball which is adapted to engage an aperture in a removable latch member. When a force above a particular value is exerted upon the latch, detent action between the ball and the latch member aperture is broken, and the latch is released.
- The arrangement of US-A-3,704,633 is described in its application to a release assembly for a dog leash, and is unsuitable for use in a sailboarding context.
- It is an object of this invention to provide an improved, effective release means for a sailboard footstrap.
- The invention provides a release arrangement for a sailboard footstrap, consisting of a first member and a second member provided with engagement means which enable said members to remain engaged until particular forces acting on the arrangement cause the disengagement of said members, characterized in that said members are provided with release elements to enable one or more release modes to operate in response to forces of different magnitudes applied to said arrangement in different directions.
- An embodiment of the invention will be described in detail hereinafter, with reference to the accompanying drawings, in which:-
- FIGURE 1 is an exploded perspective view of a footstrap incorporating one embodiment of release means according to this invention;
- FIGURE 2 is a plan view from one side of a release means female member component;
- FIGURE 3 is an end elevation from the right of FIGURE 2, of the component of FIGURE 2;
- FIGURE 4 is a plan view from the other side of the component of FIGURE 2;
- FIGURE 5 is a plan view of a release means male member;
- FIGURE 6 is an end elevation from the left in FIGURE 5 of the member of FIGURE 5;
- FIGURE 7 is a cross-sectional view through an assembled footstrap incorporating the release means embodiment;
- FIGURE 8 is a plan view of release means components relatively rotated to one position; and
- FIGURE 9 is a plan view of release means components relatively rotated to another position.
- FIGURE 1 shows a
footstrap arrangement 10, for attachment to a sailboard (not shown). Normally there can be up to five footstraps on a wavejumper sailboard, all of which may take the form of thefootstrap 10. - The
footstrap 10 includes astrap 12, preferably formed frompolypropylene sheet material 13, with or without a portion ofseat belt webbing 15 attached to its lower surface.Strap 12 hasapertures member 22 respectively. - A
clamping plate 24 withapertures first end 30 ofstrap 12 to a sailboard upper surface. Theplate 24 is preferably moulded from nylon or acetal plastics material.Screws apertures - Female release means
member 22, consists of twoidentical components Components component 38 has a generally rectangular shape, with onecurved end 42. Theinner face 44 has arecessed portion 46, which has anaperture 48 therein, with achamfered portion 49 adjacent to recessedportion 46. Alternatively, the aperture may be frusto-conical in configuration. Betweenaperture 48 andcurved end 42 is anotch 50. A locatingpin 52 extends from one side ofrecessed portion 46, and there is a locatingaperture 54 on the other side of the portion.Connection apertures outer face 50 toinner face 44.Aperture 56 has achamfer 62, andaperture 58 has a recessedhexagonal portion 64 to accommodate ahexagonal nut 66, which in the assembledmember 22 engages withbolt 68. Bolt 70 extends throughaperture 56 to engage withhexagonal nut 72. -
Component 40 hasfeatures reference numerals component 38. - A thin packing piece 118 (or a plurality of such pieces) may be used to increase the distance between
components female member 22 and attached tosecond end 31 ofstrap 12.Packing piece 118 has apertures 120,122 therein. - To assemble
female member 22 in place onsecond end 31,components pin 52 entersaperture 154, andpin 152 entersaperture 54. If apacking piece 118 is used, it is placed betweensurfaces 44 and 144, as isend 31 ofstrap 12.Apertures screw 70 is inserted therein, and is tightened onnut 72 which is located in recessedportion 164.Apertures screw 68 is inserted therein, to be tightened onnut 66 located in recessedportion 64. -
Male member 74 also shown in FIGURES 5 and 6, has afirst portion 76 in which anarrow slot 78 is provided, for the attachment of aloop 80 of seat belt webbing or the like. Asecond portion 82 extends from the first portion, with taperingsides surface 88 ofsecond portion 82 is a frusto-conical boss 90, and on theother surface 92 ofsecond portion 82 is a registering frusto-conical boss 94.Component 74 is preferably injection moulded from an acetal plastic. -
Loop 80 has apertures 96,98 in a first,upper portion 100, and registering apertures (not shown) in alower portion 102. Afterupper portion 100 is passed throughslot 78 inmember 74, theloop 80 is clamped to the sailboard by aclamping plate 104 which is identical to previously describedclamping plate 24.Plate 104 has apertures 106,108, which register with apertures 96,100 and through which screws 110,112 (preferably stainless steel self-tapping screws) pass into plastic plugs (one of which 114 is shown in FIGURE 7) attached to thesailboard core material 116. - To connect
member male member 74 is pushed into the aperture between portions 46,146 offemale member 22. Bosses 90,94 are pushed intonotches 150,50 respectively, which aids in spreading portions 46,146 apart, thereby easing themale member 74 into thefemale member 22. The portions 46,146 at least should be formed from a slightly resilient material, such as that previously mentioned. With the portions 46,146 deformed outwardly, the male member can seat in the aperture between the portions 46,146, withbosses apertures walls member 74 element and pins 52,152 ofmember 22 element to provide an ability for the arrangement to adapt to the angle of the rider's foot. Thus, there is an ability for themembers bosses apertures - FIGURE 7 shows a preferred
footstrap mounting arrangement 10 in section, with the various components of FIGURES 1 to 6 assembled into an "in-use" situation. The sailboard skin, typically plastic or fibreglass cloth and polyester resin, is denoted by 124. - A
cover 126 is also shown. Thecover 126 consists of aneoprene sheet portion 128 wrapped aroundstrap arrangement 10 and secured by aportion 130 of Velcro (Registered Trade Mark) material. - Under normal boardriding circumstances, the forces on the footstrap and buckle elements would not be sufficient to require or cause the release means to operate. However, there are four modes of release which may operate in the appropriate circumstances.
- Firstly, there is the release mode which operates when forces along the longitudinal axis of
members 22,74 (shown by the arrow in FIGURE 7) exceed a predetermined value. This is the direction in which the greatest force must be exerted on the connection ofmembers - As has been described,
bosses bosses components member 22 apart, enablingmale member 74 to withdrawfemale member 22. This first release moment would operate for example, when a sailboard/wavejumper became airborne, and thereafter entered the water tail first. - FIGURES 8 and 9 show the second release mode. This second mode operates when a relatively rotating force is applied to
members - In this release mode,
wall 84 ofmember 74 co-operates withpin 52, (FIGURE 8) orwall 82 co-operates withpin 152 in lever-type actions to leverbosses - A third release mode operates where there is relative twisting of
elements strap 12. The relative twisting forces recessed portions 46,146 apart, allowingbosses male member 74 to leavefemale member 22. The force at which this mode operates can be varied, as stated hereinbefore, by the inclusion or omission of one or more packing pieces(s) 118. - A fourth release mode which is similar to the first mode, caters for the situation when there is excessive lateral pressure on the
strap arrangement 10. This may occur when the rider's foot slides sideways along the longitudinal axis of the sailboard, usually in a forward direction, in FIGURE 7 from right to left. This usually occurs after the sailboard has become airborne; upon landing it enters the water with its nose pointing downwards at an excessively steep angle. As a result the board comes to a sudden stop, causing the rider to move forward relative thereto. - With the motion of the foot in the direction indicated, the release means "springs" open, under the influence of the force which is in the indicated direction.
- In each of the four release modes, there is a separate varying predetermined force at which each mode will operate. The buckle's three modes cater for all types of sailboarding mishaps, and ensure that a rider's feet cannot be trapped in footstraps if a mishap occurs. Some exemplary release mode operational weights may be 50 kg to 100 kg for the first mode, and 5.44 kg for mode two.
- In general, it is observed that adjustment for various foot sizes may be made by adjusting the length of the
strap 12, by providing a number of mounting holes therein, by a Velcro (Registered Trade Mark) type connection, or in any other manner.
Claims (13)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT85630210T ATE54635T1 (en) | 1984-11-30 | 1985-12-02 | DEVICE FOR OPENING THE FOOT STRAPS OF A WINDBOARD. |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AUPG838384 | 1984-11-30 | ||
AU8383/84 | 1984-11-30 | ||
AU50486/85A AU581706B2 (en) | 1984-11-30 | 1985-11-30 | Release means for sailboard footstraps |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0188170A1 true EP0188170A1 (en) | 1986-07-23 |
EP0188170B1 EP0188170B1 (en) | 1990-07-18 |
Family
ID=25628933
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP85630210A Expired - Lifetime EP0188170B1 (en) | 1984-11-30 | 1985-12-02 | Release means for sailboard footstraps |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0188170B1 (en) |
AU (1) | AU581706B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002015730A3 (en) * | 2000-08-22 | 2002-06-13 | Max R Runyan | Foot retention device |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1499428A (en) * | 1923-06-02 | 1924-07-01 | Ira D Wagner | Garment fastener |
DE468012C (en) * | 1928-11-05 | Dora Gottlieb | Slide lock | |
US3675282A (en) * | 1970-10-23 | 1972-07-11 | Ametek Inc | Mechanical fuse |
US3704633A (en) * | 1971-01-25 | 1972-12-05 | Keith E Iverson | Tension member overload release mechanism |
FR2287251A1 (en) * | 1974-10-08 | 1976-05-07 | Hir J P Le | Foot binding for water ski - has ends of stray adjustable along rails at side of foot recess in block |
US4131963A (en) * | 1977-12-30 | 1979-01-02 | Johnson Knute N | Ski binding |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU520480B2 (en) * | 1978-06-14 | 1982-02-04 | Ski-Ace Pty. Ltd. | Water ski |
-
1985
- 1985-11-30 AU AU50486/85A patent/AU581706B2/en not_active Ceased
- 1985-12-02 EP EP85630210A patent/EP0188170B1/en not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE468012C (en) * | 1928-11-05 | Dora Gottlieb | Slide lock | |
US1499428A (en) * | 1923-06-02 | 1924-07-01 | Ira D Wagner | Garment fastener |
US3675282A (en) * | 1970-10-23 | 1972-07-11 | Ametek Inc | Mechanical fuse |
US3704633A (en) * | 1971-01-25 | 1972-12-05 | Keith E Iverson | Tension member overload release mechanism |
FR2287251A1 (en) * | 1974-10-08 | 1976-05-07 | Hir J P Le | Foot binding for water ski - has ends of stray adjustable along rails at side of foot recess in block |
US4131963A (en) * | 1977-12-30 | 1979-01-02 | Johnson Knute N | Ski binding |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002015730A3 (en) * | 2000-08-22 | 2002-06-13 | Max R Runyan | Foot retention device |
JP4885410B2 (en) * | 2000-08-22 | 2012-02-29 | マックス アール ランヤン | Foot holding device, upright riding device, footwear, assembling upright riding device and shoe manufacturing method |
Also Published As
Publication number | Publication date |
---|---|
AU581706B2 (en) | 1989-03-02 |
EP0188170B1 (en) | 1990-07-18 |
AU5048685A (en) | 1986-07-17 |
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