Webbing Fastener
A webbing fastener (10) has a hook element (12) formed from a woven webbing strap (14) having a proximal end (16) and a distal end (18) that has a hook-like pad (20) formed thereon, and, an aperture element (22) that may be formed by a ‘square ring’ (24) attached by a loop (26) to a second strip of webbing (28). The pad (20) can be formed by coiling the distal end (18) of webbing strap (14) into a flat tight coil and sewing it transversely to form a pair of transverse seams (30) that divide the pad (20) into a proximal end portion (a) and a distal end portion (b). The proximal end portion (a) forms a barb-like hook that can be move away from the distal portion of the webbing strap (14) to engage the proximal periphery of the ring (24) and to retain the hook element (12) within the aperture element (22).
This invention relates to webbing fasteners and anchors and elements thereof. It is applicable to the anchoring of webbing straps to ‘square rings’ and elongate slots in fittings and fixtures. It is particularly suited for use with backpacks, sacks, luggage and the like (herein referred to as ‘packs’) where webbing straps are attached to anchor rings sewn into the packs and/or the packs incorporate frames that have slots for the attachment of webbing straps. The invention is also applicable to the fastening of two webbing straps together.
In this specification, ‘webbing’ generally refers to an elongate flexible band, strip or tape of woven textile material intended for use where lightweight, high tensile strength, softness and flexibility is desired. However, the term ‘webbing strap’ will be used to emphasize the elongate nature of the webbing. Of particular interest here are the straps used for carrying packs or for securing accessories such as helmets and kneepads to people, as well as straps for attaching loads to packs, belts, clothing and gear used by hikers, hunters, armed service personnel, rescue and paramilitary personnel. Straps of this nature are also widely used in the transport industry. They vary greatly in size and type. ‘Square ring’ is a convenient term that is commonly used to refer to a ring or slotted plate of generally rectangular shape with an elongate slot-like hole therein. Such rings are commonly used to anchor webbing straps.
BACKGROUND TO THE INVENTIONWebbing straps used with packs are commonly anchored to square rings sewn into the packs, or to slots formed on or in the frame of the pack, by passing one end of the webbing strap through the ring or slot, folding it back on itself and permanently securing the end to the body of the strap by sewing, riveting or the like to form a loop. The other end of the strap is usually left free for attachment to adjustable buckles, clips and the like—or for simply tying. This means that the webbing strap must be fixed to the anchor ring or slot and cut to length at the time the pack is manufactured. If it is too long for the ultimate customer, it can be readily shortened by cutting off portion of the free end, although some unnecessary waste thereby results. If it is too short, the fixed end must be cut free from the anchor ring or slot and a new length of webbing sewn or otherwise fixed in place. Similarly, if the webbing should become worn or damaged during use, or if a longer piece is required, the old webbing must be cut off the ring or frame and the new piece sewn into place. This generally requires the services of a tent maker or cobbler and is awkward and expensive. The alternative of attaching the new webbing to the anchor ring by a hook or buckle involves unnecessary weight and equipment and often requires permanent attachment of the strap to the hook or buckle. It is also costly and adds the danger of the hook or buckle rubbing through the pack. These problems are common to many of the uses of webbing straps, particularly when used to attach helmets, elbowpads or kneepads.
The present invention involves forming an integral hook-like tab on the anchor end (herein referred to as the distal end) of a webbing strap in such a way that it can be securely but removably retained by an anchor ring or slot. This avoids the need to non-removably fix the webbing strap to the pack at the time of manufacture and allows it to be replaced by the user without the need for sewing or riveting, or the use of additional clips and buckles. Where the square ring or a slotted plate is attached to a second webbing strap, the invention provides a webbing fastener for joining two webbing straps.
Tab-and-slot fasteners are well known, the archetypical form being the button and button-hole which has been used for centuries. U.S. Pat. No. 4,315,508 to Bolick (assigned to Kimberly-Clark Corp) discloses the use of straps fitted with buttons that enter slots suitable for use in diapers and incontinent pads. This patent and its citations provide a useful review of this art. Similarly, hook and eye fasteners are also well known, having been in use for centuries. Recent U.S. Pat. Nos. 6,432,098 and 6,251,097 to Kline et al (assigned to Proctor & Gamble Co.) together with their citations provide useful reviews of both tab and slot fasteners and hook and eye fasteners as applied to disposable diapers and the like. While many of such prior art fasteners can be used to anchor webbing straps used in backpacks and the like, they frequently lack the necessary strength. Moreover such fasteners rely upon the attachment of separate hooks, tabs or catches by riveting, adhesives or stitching and, because of that, not only require the purchase and stocking of such components but also often require special assembly jigs.
OUTLINE OF THE INVENTIONThe present invention provides a simple and effective hook element for a webbing fastener as well as a webbing fastener comprising that hook element and an aperture element, whether the aperture element is formed by a square ring or by a slot in a fixture such as a backpack frame, load pallet or the like.
From one aspect, the invention comprises a hook element for a webbing fastener comprising multiple folded or coiled layers of webbing forming a substantially rectangular first pad on a first side of the distal end of a webbing strap, the pad having distal and proximal end portions. A first transverse seam of stitches secures the layers of the pad together and secures the pad to the webbing strap, the seam being located intermediate of the end portions of the pad so that (i) the proximal end portion can be separated from the first side of the webbing to form a hook-like barb capable of engaging the proximal periphery of the slot-like opening after the distal end portion of the pad has been passed through the opening, and (ii), upon tension being applied to the webbing strap, the distal end portion of the pad rotates to abut against the distal periphery of the opening to prevent the pad from being pulled back through the opening.
The use of at least one transverse seam of stitches to form the hook like pad allows great strength to be imparted to the hook element through the choice of the thread or filament used; for example, continuous filament Kevlar or polyester of appropriate gauge. This is vastly superior to the use of adhesives or heat-bonding.
From another aspect, the invention comprises a webbing fastener formed by the combination of the hook and aperture elements indicated above.
It is desirable that the hook-like pad have at least three layers of webbing with four or more being feasible and it is desirable that the pad should be a fairly tight fit in the aperture. Indeed, sloppiness between the pad and the opening of the aperture element in either dimension is undesirable, particularly in thickness. These characteristics minimize the possibility of the pad being folded back double and pulled back through the opening under strong webbing tension. However, it will be appreciated that the number of layers will depend upon the stiffness of the webbing and the design loading. Pull-through of the pad can also be countered by having at least one additional transverse seam of stitches formed across the pad distally of the first seam so as to compress and stiffen the distal portion of the pad to inhibit it being bent back against the periphery of the opening under load. The compression of the pad provided by the additional seam(s) also facilitates entry of the pad distal-end-first into the opening of the square ring, aperture plate or slotted fixture.
Webbing elements of the type disclosed can be made very strong, lightweight and compact. Indeed, in some tests, the square rings and length-adjusting plastic webbing buckles have broken first. They are free of metal or molded plastic parts which can rub and wear adjacent portions of packs or the like. They are very cheap to make, they tighten under tension but can be undone by reversing the insertion procedure (once tension is completely removed) to permit replacement webbing straps at home or in the field without the need for any fixing tools or equipment.
Usually, the pad forming the hook-like barb will be made by folding or coiling the the webbing on itself because that is simplest and easiest. However, the pad can be formed by folding or coiling a separate piece of webbing and attaching it to the webbing to be anchored. It will also be usual to form the pad on the distal extremity of the webbing to be anchored so that no excess webbing extends beyond the pad. However, it is envisaged that two or more spaced pads can be formed on or near the distal end of the webbing to provide multiple anchor points.
Furthermore, there is advantage in some circumstances in allowing the distal extremity of the webbing to extend beyond the pad to form an extraction flap. Such a flap, when folded back through the aperture (after the pad has been passed therethrough) can then be used to facilitate the quick release of the anchor by simply pulling on the flap after tension on the webbing has been relieved. For example a flap of webbing may be formed on the proximal end of the pad so as to extend proximally from the pad, the flap being arranged to abut or engage the periphery of the aperture when the pad is inserted therein. Thus, when the webbing is pulled away from the aperture after engagement, the flap will be caught between the proximal portion of the pad and the periphery of the aperture, leaving portion of the flap extending proximally. This portion of the flap is desirably sufficiently long in its proximal extension that, after the pad is inserted into the aperture, it can be grasped and pulled to facilitate the withdrawal of the pad from the aperture (when all tension on the webbing is released).
If desired, a second pad of similar form to the first pad may be formed opposite the first pad on the distal end of the webbing so that the proximal portions of the pads engage opposite sides of the aperture when they are inserted into the aperture and a pulling force is applied to the webbing. While this would allow the pads to engage a hole in a fixture, the double-pad arrangement allows two square rings to be simultaneously engaged, one with each pad, provided one ring is wider than the other so that it can enter within the other to enable the rings to cross when engaged. A flap of the type indicated may be provided on both of the pads to facilitate their withdrawal from the aperture.
Where a pad is formed on each side of the webbing, they may be secured by separate or common seams. The aperture element of such a fastener may then comprise a slot in a fixture (as previously indicated) such that each pad engages an opposite side of the slot. Alternatively, each pad may be engaged by separate square rings formed on the ends of separate webbing straps or attached as a pair to the end of one webbing strap. Of course, the square ring[s] can be attached direct to a fixture, rather than to a strap and rather than forming a slot in the fixture.
The aperture normally forms the second element of the anchor or fastener and may comprise either a square ring or a slot formed in a ‘fixture’ such as a backpack frame or a transportable rigid container. Square rings are commonly attached to the ends of short webbing straps or loops sewn into packs etc at strategic locations. However, some packs will be mounted on or include moulded plastic or fabricated metal frames that include elongate slots or wire loops adapted to take the anchor pads of the present invention. This further simplifies the construction and fittings of such framed packs.
As noted at the outset, the invention also includes packs having at least one length of webbing with at least one anchor pad formed in the manner indicated above.
Having portrayed the nature of the present invention, particular examples of the application of the principles thereof will now be described with reference to the accompanying drawings. However, those skilled in the art will appreciate that many variations and modifications can be made to the example without departing from the scope of the invention as outlined above. In the accompanying drawings:
The first example is a webbing fastener or anchor 10 illustrated in
In this example, pad 20 is simply formed by coiling the distal end 18 of webbing strap 14 into a flat tight coil and sewing it transversely to form a pair of transverse seams 30. In this example, as shown, seams 30 pass through five layers of webbing and pad 20 is integral with the distal end of webbing 14. Seams 30 divide pad 20 into a proximal end portion a and a distal end portion b. Because of the number of layers and folds involved, portion b is somewhat stiffer than a. This is desirable. Indeed, it is often preferable to further stiffen portion b by an additional transverse seam located distally of seams 30, as indicated by broken line 32. [Of course, if a seam is formed at line 32, it would pass right through all five layers of pad 20, just like seams 30.]
It is desirable that square ring 24 is a little wider than the width of webbing straps 14 and 28 so that (i) there is a little lateral play between the sides of pad 20 and ends 34 of ring 24 and (ii) second webbing strap 28 can lie flat (as shown). Of course, the depth c of ring 24 should be a little greater than the thickness d of pad 20 so that the pad can be readily passed through ring 28, but there should be a minimum of clearance consistent with the need to pass pad 20 through ring 24 by hand without the need for special tools.
The manner in which elements 12 and 22 of fastener 10 are coupled together is illustrated in the stages of
When coupled fastener 10 is put under further tension by pulling outwardly on webbing strips 16 and 28, as shown by arrows 44 in
The second example will now be described with respect to
As before, fastener 100 comprises a hook-like element 102 comprising a hook-like pad 104 formed near the distal end 105 of a first webbing strap 106 and an aperture element 108 having a square ring 110 secured to a second webbing strap 112. While, as before, pad 104 is integral with strap 106 being formed by folding the distal end of the strap 106, the strap is folded in a zig-zag pattern to form pad 104 rather than being coiled. This allows a different form of pad to be made.
More particularly, as best seen in
As previously noted,
The third example of a webbing fastener formed in accordance with the present invention is an anchor fastener 200 shown in
Again, it is surprising that such a simple and cheap fastener can exhibit such high strength.
The fourth example of the application of the principles of the present invention is a fastener 300 illustrated in sectional elevation in
It will be seen that pad 306 and ring 312 act in essentially the same manner as the ‘single-sided’ fastener 10 of the first example, as does pad 308 and ring 310. Little further explanation of the operation of fastener 300 is therefore needed, except to point out that assembly of ‘double-sided’ fastener 300 is a little more complicated. To ensure smooth assembly, it is important that the width of one ring—say ring 310—should be greater than that of the other—say ring 312—so that ring 312 will easily pass through ring 310. It is also important to note that the length of loops 314 and 316 should be sufficient to allow rings 310 and 312 to pass over the proximal ends of pads 306 and 308 more or less simultaneously.
Thus to assemble fastener 300, ring 312 is fitted within ring 310 and the two rings are arranged substantially at right angles to webbing 304 so that pads 308 and 308 and pass through both rings. Ring 312 is then swung inwards to abut one side of webbing 302 and to engage pad 306 and ring 310 is then swung inwards to abut the other side of webbing 302 and to engage pad 308. Tension can then be applied to webbings 302 and 304 to close the fastener, as illustrated in
It will be appreciated that it may be more convenient to form webbings 302 and 304 in double thickness. This would allow pad 306 to be formed on the distal end of one layer of webbing 302 and pad 308 to be formed on the distal ends of the other layer. Similarly, loop 310 could be formed on the proximal end of one layer of webbing 304 and loop 312 could be formed on the proximal end of the other layer of webbing 304. This would have the advantage of conferring greater strength to the fastener because, as already noted, the webbing is generally the first element of the fasteners of the invention to fail.
The fifth example is shown in
Though a number of examples of webbing fasteners have been described, it will be appreciated that many variations and additions to the chosen examples are possible, and that many other examples could be devised, without departing from the scope of the invention as outlined above.
Claims
1. A hook element for a webbing fastener, the hook element being adapted to engage with an aperture element that has a slot-like opening, characterized in that:
- the hook element is formed on a first side of a distal end of an elongate webbing strap by multiple folded or coiled layers of webbing at said distal end that form a substantially rectangular first pad on said first side, said pad having distal and proximal end portions and the webbing strap having a second side opposite said first side,
- a first transverse seam of stitches secures the layers of the pad together and secures the pad to the distal end of the webbing strap, said first seam being located intermediate between the distal and proximal end portions of the pad so that the proximal end portion of the pad is separable from the distal portion of the webbing strap to thereby form a hook-like barb capable of engaging the periphery of the slot-like opening once having been entered into said opening.
2. A hook element for a webbing fastener according to claim 1 wherein:
- at least one additional transverse seam of stitches is formed across the pad distally of said first seam so as to compress the distal end portion of the pad to facilitate its entry into the slot-like opening of the aperture element and so as to stiffen the distal end portion of the pad to inhibit said distal end portion being bent and pulled back through the opening after the proximal end portion of the pad has been inserted and engaged thereby and after tension is applied between the hook element and the aperture element.
3. A hook element according to claim 1 wherein:
- the distal end of the webbing strap extends distally beyond the pad to form a flap that can be folded over the pad after the pad has been inserted into the opening of the aperture element so that removal of the pad from the opening is facilitated by pulling on the flap.
4. A hook element according to claim 1 wherein:
- a second pad is formed on the second side of the webbing strap in like manner to said first pad so that both first and second pads can be passed through the opening of the aperture element and each pad can engage a respective portion of the aperture element to retain the hook element within the aperture element.
5. A webbing fastener assembly comprising a hook element and an aperture element that has a slot-like opening which is adapted to receive and releasably retain the hook element in a secure manner, the assembly being characterized in that:
- the hook element is formed on a first side of a distal end of an elongate webbing strap by multiple folded or coiled layers of webbing at said distal end that form a substantially rectangular first pad on said first side, the pad having distal and proximal end portions and the webbing having a second side opposite said first side,
- a first transverse seam of stitches secures the layers of the pad together and secures the pad to the distal end of the webbing strap, said first seam being located intermediate between the distal and proximal end portions of the pad so that the proximal end portion of the pad is separable from the distal portion of the webbing strap to thereby form a hook-like barb capable of engaging and being retained by the slot-like opening once having been entered therein.
6. A webbing fastener assembly according to claim 5 wherein:
- at least one additional transverse seam of stitches is formed across the pad distally of said first seam so as to compress the distal end portion of the pad to facilitate its entry into the slot-like opening of the aperture element and so as to stiffen the distal end portion of the pad to inhibit said distal end portion being bent and pulled back through the opening after the proximal end portion of the pad has been inserted and engaged thereby and after tension is applied between the hook element and the aperture element.
7. A webbing fastener assembly according to claim 5 wherein:
- the opening of the aperture element has an elongate proximal periphery and an opposing distal periphery, said peripheries at least in part defining said opening,
- said proximal periphery of the aperture element is adapted for location between said hook-like barb and the distal end of the webbing strap after the first pad has been passed through the opening, and
- said distal periphery of the aperture element is adapted to form a stop or abutment to inhibit rotation of the pad with respect to the aperture element when tension is applied to between the hook element and the aperture element.
8. A webbing fastener assembly according to claim 5 wherein
- the aperture element comprises an elongate anchor ring having an elongate proximal periphery and an opposing distal periphery, said peripheries at least in part defining said opening,
- said proximal periphery of the aperture element is adapted for location between said hook-like barb and the distal end of the webbing strap after the first pad has been passed through the opening, and
- said distal periphery of the aperture element is adapted to form a stop or abutment to inhibit rotation of the pad with respect to the aperture element when tension is applied to between the hook element and the aperture element.
9. A webbing fastener assembly according to claim 5 wherein:
- the distal end of the webbing strap extends distally beyond the first pad to form a flap, such that said flap can be entered into the opening of the aperture element in a proximal direction and engaged by the aperture element to fold between the proximal portion of the first pad and the webbing strap when the first pad is entered into the opening and pulled proximally and such, when it is desired to uncouple the hook element and the aperture element, the flap can be pulled back distally over aperture element to effect the disengagement and withdrawal of the hook element from the aperture element.
10. A webbing fastener assembly according to claim 5 wherein:
- a second pad is formed on the second side of the webbing strap of the hook element in like manner to said first pad so that both first and second pads can be passed through the opening of the aperture element and each pad can engage a respective portion of the aperture element to retain the hook element within the aperture element.
11. A webbing fastener assembly according to claim 10 wherein the aperture element includes first and second openings so that said first and second pads can be separately entered into the respective first and second openings to thereby retain the hook element within the aperture element.
12. A webbing fastener assembly according to claim 5 wherein:
- the slot-like opening of the aperture element has opposing first and second sides,
- a second pad is formed on the second side of the webbing element substantially opposite said first pad, and
- the first and second pads can be entered together or separately through the slot-aperture and said first and second pads can respectively engage said opposing first and second sides of the opening to thereby retain the hook element within the aperture element.
13. (canceled)
14. A hook element according to claim 2 wherein:
- the distal end of the webbing strap extends distally beyond the pad to form a flap that can be folded over the pad after the pad has been inserted into the opening of the aperture element so that removal of the pad from the opening is facilitated by pulling on the flap.
15. A hook element according to claim 14 wherein:
- a second pad is formed on the second side of the webbing strap in like manner to said first pad so that both first and second pads can be passed through the opening of the aperture element and each pad can engage a respective portion of the aperture element to retain the hook element within the aperture element.
16. A webbing fastener assembly according to claim 6 wherein:
- the opening of the aperture element has an elongate proximal periphery and an opposing distal periphery, said peripheries at least in part defining said opening,
- said proximal periphery of the aperture element is adapted for location between said hook-like barb and the distal end of the webbing strap after the first pad has been passed through the opening, and
- said distal periphery of the aperture element is adapted to form a stop or abutment to inhibit rotation of the pad with respect to the aperture element when tension is applied to between the hook element and the aperture element.
157. A webbing fastener assembly according to claim 16 wherein
- the aperture element comprises an elongate anchor ring having an elongate proximal periphery and an opposing distal periphery, said peripheries at least in part defining said opening,
- said proximal periphery of the aperture element is adapted for location between said hook-like barb and the distal end of the webbing strap after the first pad has been passed through the opening, and
- said distal periphery of the aperture element is adapted to form a stop or abutment to inhibit rotation of the pad with respect to the aperture element when tension is applied to between the hook element and the aperture element.
18. A webbing fastener assembly according to claim 17 wherein:
- the distal end of the webbing strap extends distally beyond the first pad to form a flap, such that said flap can be entered into the opening of the aperture element in a proximal direction and engaged by the aperture element to fold between the proximal portion of the first pad and the webbing strap when the first pad is entered into the opening and pulled proximally and such, when it is desired to uncouple the hook element and the aperture element, the flap can be pulled back distally over aperture element to effect the disengagement and withdrawal of the hook element from the aperture element.
19. A webbing fastener assembly according to claim 18 wherein:
- a second pad is formed on the second side of the webbing strap of the hook element in like manner to said first pad so that both first and second pads can be passed through the opening of the aperture element and each pad can engage a respective portion of the aperture element to retain the hook element within the aperture element.
20. A webbing fastener assembly according to claim 19 wherein the aperture element includes first and second openings so that said first and second pads can be separately entered into the respective first and second openings to thereby retain the hook element within the aperture element.
Type: Application
Filed: Oct 7, 2005
Publication Date: Aug 14, 2008
Inventor: Ian James Maley (Western Australia)
Application Number: 11/913,556
International Classification: A44B 11/18 (20060101); A44B 11/02 (20060101); A45C 13/30 (20060101); A43C 11/02 (20060101);