DE1703618A1 - Safety device for ski bindings to reduce the friction between ski and boot sole - Google Patents

Description

Ätohell H. Cubberley, (US 647 777 ~ prio 21.6.67 Belleville, N.J .. V.St.A.

and

Gordon C. Lipe Skaneatelgg, HY. Y.St.A. Hamburg, May 8, 1970

(P 17 05 618.9-15)
NEW DOCUMENTS

Safety device for ski bindings to reduce the friction »wipe the ski and boot soles

The invention relates to safety devices for automatically releasing ski bindings, welohe the Reduce friction and reduce ski and ski boot soles and thus a failure of the lace binding when loosening against an unusually strong lateral pull caused by a fall or other accident.

In recent years there are numerous types of Safety ski bindings have been developed, welohe ™

ski boots and skis under normal skiing conditions connect firmly together, but with an unusually strong pull caused by the leverage the ski is exercised in the event of a fall or other accident, release the ski boot automatically. Injuries usually occur when the two skis run in different directions when the skis are poorly controlled to run. If the bond does not work here

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lust, before the pull exerted on the BSine becomes too great, injuries such as pulled muscles and torn tendons can occur or bone breaker !. To prevent such injuries nut the ski boot from the side Spitx binding can be detached. In the case of Sloherity blindness, this happens when those of the force exerted on one side of the ski boot becomes greater than the holding force of the spring in the toe binding, so that the boot twists out of the binding around the heel and feels like skiing. The one to overcome the Lateral spring force required in the lace binding Force is therefore a critical element in such bonds of security, as they are less than those that are too serious Leg injuries of the skier must be the leading force.

The customary security bindings are like that directed that they are adjusted for each individual skier to the loosening force required for him can. However, it has been shown that these bonds in practice under the action of the set Frequently, the pulling force does not release and thus does not offer the intended protection against injuries. It was found that this is due to the fact that at

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a weight shift of the skier forward on the ball of the foot, for example when changing the run " Direction or slowing down of the run, the resulting increased friction under the balls of the feet causes a simultaneous movement the toe of the boot over the ski sum detaching from the Lace ties approached or prevented in the event of an accident. Due to this greater frictional resistance, the to overcome the spring force of the lace binding increased force required at the crucial moment. It was found that when the ball is loaded with the main weight of the skier to loosen the Lace tie required force 50 $ greater than Bonet is and in cases where there is still friction Sand or stone heights that increase further between the boot sole and the ski are even larger can be.

The present invention is therefore the object based on proposing a device with which the aforementioned disadvantages of the known safety bindings can be overcome and accidents through a safe? Loosening of the ski binding can be prevented at a crucial moment.

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This task is made possible by a safety device solved, which is attached to the ski under the ball of the skier and the addition » borrowed by the skier's weight shift on the ball and / or the presence of sand, gravel or other foreign bodies under the boot sole reduces the frictional resistance. These Safety device consists of a friction reducing part and a means for fastening this part on the top of the ski. The friction-reducing part consists of two superimposed! Parts of which the lower one is firmly attached to the ski and the upper one is also attached to the SIdL, but slides easily over the lower part even under the full weight of the skier. The upper part consists of a supple and preferably elastic sheet-shaped part. The lower part can consist of an identical or similar leaf-shaped part or of a rigid base plate. the Reduction of the frictional resistance is achieved through the appropriate choice of materials for the two p.ufein * other parts or by using a suitable lubricant between the two parts achieved. The top and bottom parts can also

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from amines a closed one filled with lubricant Form gravel. This safety device is attached to the ski by mechanical means or by gluing .

The invention is explained in more detail below with reference to the accompanying drawings; it «own;

Figure 1 - a ski with automatically loosening toe and heel bindings and one in between In the place of the bale screwed invention * according to collateral contraption;

Figure 2 - the ski shown in Figure 1 with binding and safety device in side view;

FIG. 3 - a cross section through that shown in FIG Ski and the safety device: j

Figure 4 «a cross section through a ski with a other embodiment of the invention buses Safety device that can be glued to the ski;

Figure 5 - a cross section through a ski with a further embodiment of the invention » mass safety device, which consists of a lubricant-filled closed Pillow consists of;

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Figure 6 - a cross section through a ski with a fourth embodiment of the invention must safety device, which consists of a porous bronze plate and a lubricant (Sl consists.

In the embodiment shown in Figure 1 and 3 embodiment of the inventive security device 10 by means of screws 12 1st zwisohen the tip binding IJ> nnd the heel binding 14 to a ski 11. gesohraubt. The safety device is located directly under the ball of the skier when the ski is attached to the foot in the position indicated by the boot 15 shown in dashed lines. The safety device 10 consists of a friction-reducing part and a fastening means; In this case, the fastening means is formed by the screws 12 and the friction-reducing part consists of a base plate 16, a flexible leaf-shaped top part and an intermediate lubricant 18. Two opposite sides of the leaf-shaped top part 17 are folded under the plate 16 so that they Form anchoring point 19, which is held firmly between the ski surface and the base plate when the safety device is placed on the ski 11 and the base plate 16 is tightened by tightening the screws 12

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will. The leaf-shaped upper part 17 can be made of any flexible material, but preferably a fabric covered with neoprene guini is used, which is not only flexible but also elastic. When using such a fabric with a neoprene rubber cover, the folded sides of the upper part 17 can, for example, λ

be permanently folded by vulcanization, so that you get kinks 20, which the location of the Stabilize upper part 17 over the base plate and the ski by a resilient effect by the upper part after a deformation let it return to its normal position · The base plate 16 has almost the same width like the ski, however, it is preferably narrower by a small amount so that there is no protruding edge behind Any objects passed by the ski can hook The folded sides of the upper part 17 and the kink "

make the same preferably protrude slightly over the edges of the base plate and can even over the Ski edges protrude. The amount by which the folded rare parts of the flexible upper part 17 over the edges protrude from the base plate 16, determines the limits

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in welohen aloh the upper part 17 when deforming Strangely directed forces between the two kinks 20 across the width of the ski naoh "both sides can move.

In Figure 2, the ski boot 15 is at a short distance drawn from the top of the supple upper part 17 of the safety device to the representation to make it clearer. During use, when the skier's owlht weighs down on the ski, the safety device 10, however, touches the sole of the boot 15 under the skier's footballs, whereby the underside of the toe of the boot due to the normally curved shape of the ski boots » The sole is a short distance above the base plate of the lace binding IJ. This position is on In any case, given an emergency in which the ski boot is to be released from the binding, as in one such location - as explained above - the weight of the skier rests primarily on the ball of the foot, causing the sole of the boot to come into contact with the safety device guaranteed 1st.

As has already been said, the supple leafy

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Shaped upper part 17 consist of any flexible material, although a material that is elastic on the same side is preferred. The base plate 16 can also be made of any suitable material such as plastic or metal. Suitable metals are, inter alia, aluminum and aluminum alloys, but is preferably steel and in particular stainless steel Λ. The base plate can consist of one piece or of several pieces; For example, you can put two or more plates on top of each other to achieve a best loke or for other reasons. The reduction in friction can also be achieved by any means. For example, a plate made of "Teflon" (trade name for polytetrafluoroethylene »plastic from the company £ .1 * du Pont de Neaoura & Co.) can be used as a base plate, or a plate made of metal or some other material or coated with Teflon, polyethylene or polypropylene Use a plate made of any other material with a low friction effect, so that even under the full weight of a heavy skier there is a relatively low frictional resistance between the base plate and the smooth upper part. In Figure 4 1st

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for example a Teflon coating 21 on a metal plate 16a in connection with a flexible upper part 17 made of a leloht material sliding over Teflon. So you can avoid the frictional effect suitable choice of materials for the orund plate and Achieve the silky top, Jedooh she can can also be achieved by "using a suitable lubricant. Such lubricants are all known lubricating oils and greases and other lubricants" types which are compatible with the material of the base plate and the supple upper part and their Viscosity properties are such that they at temperatures at which skis are used, i.e. at around 0 ° C down to around -18 ° C or in Parts of the world also retain their lubricating effect at even lower temperatures. Particularly suitable lubricants are, for example, the commercially available silicone greases with constant viscosity. When using Lubricating oils, the safety device is preferably according to the loop-shaped embodiment shown in FIG or the embodiment shown in Figure 6 with designed a porous plate, which are described in more detail below.

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Bel the embodiment shown in Figure 4 is the reduction of the frictional resistance by using a metal base plate 16a with a Teflon « Cover 21 on its upper side and a flexible upper part 17 made of a material that slides well on Teflon achieved without additional lubricant as in the embodiment shown in Figure. Still exists in the embodiment shown in Figure 4, the Be Fastening agent made of an adhesive 22, which replaces the screws 12 shown in FIG. 3. The adhesive 22 can consist of any commercially available adhesive, which comprises the base plate 16, which is made of metal or plastic, and the flexible upper part 17, which is made of fabric, plastic or coated fabric durable with the one made of wood, plastic or metal » standing ski body 11 glued; in the illustrated embodiments, the ski is made of wood. The adhesive »f

Fabric 22 can be applied to one and / or the other of the surfaces to be bonded and to the be glued to a durable connection in the usual way for the adhesive used in each case. the Adhesive connection can also consist of an on the underside of the assembled safety device for reason » plate and upper part applied self-adhesive

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Adhesive layer exist, whereby the two parts of the safety device through the common adhesive layer or by an additional adhesive between the base plate and the folded ones Anchoring parts 19 of the flexible upper part are held together. The self-adhesive glue 22 can be covered with a protective sheet which is then peeled off later to allow the device to pass through To be attached to the desired location on the ski surface. In this way, the Safety devices are manufactured in a form in which they can be quickly and can easily be attached to the ski without tools and easy to use while skiing have it renewed.

In the embodiment shown in Figure 5, the Reduction of the frictional resistance achieved by a closed cushion 25, the top of which the flexible sheet-shaped part 17 corresponds in the other embodiments of the invention. This closed cushion 25, which has a generally flat Has form, contains a suitable lubricant 18, which from one of the above-mentioned Sohmiermitteltypes can consist, in particular of oils or others

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liquid lubricants that are less suitable for the open-sided designs shown in Pigur 1 # 2, 3 »* and 6. The cushion 25 can be attached to the ski in any desired manner, but an adhesive attachment is generally preferred to a mechanical attachment in order to obtain a cushion which is resistant to the leakage of lubricant. In the illustration, therefore, an adhesive layer 22 is shown on the underside of the cushion 25. In addition, the embodiment shown in Pigur 5 has a base plate 16 which, before the cushion is applied to the ski, forms a stable base for the latter and makes it easier to attach the safety device to the ski, since it forms a solid surface which is against the solid surface of the ski can be pressed. Between this optionally usable base plate 16 and the surface of the ski body 11 is a second adhesive %

middle layer 22 shown. Each of the two adhesive layers 22 can consist of one of the above regular adhesives or one of the self-adhesive adhesives described in connection with Pigur 4 exist.

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The gravel 23 has a similar shape to the sleek one Upper part 17 of those shown in FIGS. 1, 2, JJ, 4 and 6 Embodiments, however, it still has a leaf-shaped bottom part 24 and side walls connecting the two parts 25 · The bottom part 24 has the same shape as the upper one Pillow part 23 and the leaf-shaped upper parts 17 and forms a base for the lubricant, which function in the other embodiments depends on the » plate 16 is taken over. Preferably, the cushion of the embodiment according to FIG. 5 has one as seen from above round or oval shape instead of the generally rectangular shape shown. The ones facing near the front and the back Cross winds 25 of the cushion 23, i.e. the one across the ski trending cross winds, regardless of whether that Pillow is round »oval or rectangular, preferably more flexible or elastic than the one parallel to the side edge of the ski running side walls 25. This can be achieved, for example, by opening the front and forming cushion rear sidewalls 25 thinner than the remaining sidewalls when molded. To this Catfish provide the front and rear side walls 25 in an emergency when the ski boot is out of the binding loosens and the ball of the foot of the skier loosens in general moved laterally or radially to the longitudinal axis of the ski,

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less resistance to lateral deformation dee pillow.

6 shows a similar embodiment of the inventive device as shown in Figure 4, be replaced by a base plate 16b made of porous bronze, the coated with Teflon base plate "which m with a suitable oil according to the known process for preparing an oil-bronze containing surface saturated 1st .

The inventive safety devices can be used in conjunction with practically any of the innumerable commercially available ski bindings that release automatically can be used. These bonds can in general, however, do not need to include a heel binding that holds the heel of the ski boot firmly down against ™ the top of the ski holds, but in an emergency, such as a fall, the boot heel is vertical pull it up or out by moving the boot radially using the heel binding as a fulcrum unscrewed to avoid an unusually strong pull in these directions. These heel ties can go along with the essential lace tie

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used, which serves to keep the tip of the ski boot in the correct position under normal conditions Position to hold to the ski «, however, a vertical, lateral or rolling removal of the boot tip to cancel an unusually strong pull in these directions in the event of a fall or a similar accident enables. A vertical detachment from the lace binding may be necessary if the skier does so falls backwards so that the tip is raised. A rolling detachment from the lace binding can occur in a lateral fall of the skier is necessary The important vertical or rolling solution from the ski binding is seldom required to to prevent serious injury to the skier, so that some common ski bindings cannot be released by unrolling. The main task of the self-releasing lace tying is therefore there in it, a serious injury by loosening the toe of the boot in an unusually strong since » to prevent borrowed train, since this lateral detachment in particular avoids the severe splinter fractures which in the event of a fall, in which the skis act as levers, due to the on the legs of the Falling acting strong twisting force can occur.

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So it is of the utmost importance that the Lace binding a lateral detachment in both Directions allows to make a train more certain Strength by stature, weight, strength

and depends on the skill of the skier to escape. While it is not possible for that

Safety Every skier has optimal loosening power Precision to be determined beforehand, however experience M

shown that for a beginner the lace tie the

Must release the toe of the boot with a train, which is about

25J £ des vertically on the tip holder of the binding « acting skier's weight. Assume that the ski boot is rotated around the heel as a fulcrum becomes, only a small frictional resistance under the

Drop of the foot present 1st and the foot about JO cm (1 ft)

is long, the weight of a skier is about 100 pounds a release force of about 25 ft.Ib., with one of 1 ^ 0 Ib. Weight has a release force of about 57.5 ft.Ib. and with one of 200 Ib. Weight has a release force of about 50 ft.Ib. necessary. These numbers can be used as

Instructions for determining the for other skiers

serve the required release force. For children, women and relatively lightly built men, the lace tie should be used be adjusted so that they are relatively low

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Force can be solved, while with stronger and more experienced skiers the above values depending on their strength and Skill can be exceeded.

Most of the known toe bindings are set up in such a way * that the force required to loosen the toe of the boot can be adjusted, and devices are also known to measure the force required for loosening at a certain setting , Inc., traded under the name Lipe Release Check ^11.

The drawings according to the invention are safe holding devices in connection with commercially available Toe and heel bindings are shown, but which are are not part of the present invention. The illustrated spring-loaded rotatable toe binding allows for ker release of the toe of each boot upwards, radially or laterally acting on the boot, which is sufficient, the rotatable part of the binding against the holding effect of the spring. The spring-loaded heel binding holds the Boot heel tight under normal conditions

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down on the ski, but releases it when exposed an unusually strong pull in an upward or radial direction from lifting or rotating the heel free. Ski bindings of this type are detailed in U.S. Patents 2,575,955, 2,616,714, and 3,007,707 described toe bindings and modified heels » Binding, one of which allows the heel to rotate after loosening the toe binding in U.S. Patents 5,150,228 and 2,272,524. These bindings are set up in such a way that you use the spring tension to set the to secure = can change the desired loosening power «

As has already been said, it turned out that in an emergency, such as a severe fall, the weight of the skier is often distributed in such a way that the The main load lies on the soccer balls. The weight on the skier's ball is often like this great that the resistance when moving the front part of the boot sideways across the surface of the ski Due to the friction between the ski and the boot sole, it is so strong that it actually causes the The force required from the lace binding

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50 J6 higher than the previously determined loosening force. If there is still sand between the ski under the boot sole at the point of the foot bail, little There are stones or similar foreign bodies, the frictional resistance against lateral movement and as a result, the force actually required to release the boot is even greater. For this reason occurs it is often the case that - although the skier has his Lace binding has adjusted so that it is under ideal conditions under the action of a certain train securely loosens - the binding underneath the boot when this particular pull is reached due to the frictional resistance does not release the ball of the skier and one opposes lateral or radial movement of the same. This is due to the leverage of the ski on the leg The skier's twisting force can cause serious injuries such as ruptured tendons and broken tendons to lead.

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The possibility of such injuries becomes essential through the safety devices according to the invention as this reduces the frictional resistance to lateral or radial movement of the toe of the boot The occurrence of an excessively strong pull

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■ Indians and thus a failure of the bond when used prevent a certain dissolving power.

The safety devices according to the invention do not set only the friction under the balls of the skier's feet but they are considerably lower due to the fact that they lie opposite one another Areas with lower frictional resistance or due to a between two opposing surfaces' Lubricant facilitate lateral sliding movement « but also reduce or prevent them additional frictional resistance due to the accumulation of sand or stone under the ski boot. That's how they are devices shown in Figures 1, 2, 3, 4 and 6 the folded side parts of the supple upper part closed on two sides, giving them the opportunity the penetration of sand or gravel between the » lying sliding surfaces of the base plate and the supple | Lower the upper part very far. In the embodiment shown in FIG. 5, in which the sliding surfaces are inside of the cushion closed on all sides 2? can be located No sand or clover at all between the sliding surfaces reach. From this it follows that the invention Safety devices the frictional forests,

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which hitherto involved the operation of visible lace ties prevented, significantly reduce and enable the actuation of these bindings in the event of an unusual tensile stress at the safety limit and thus prevent or alleviate any injuries that may otherwise occur.

hb: 8ch «

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Claims (1)

2? - Claims Safety device for self-releasing Ski bindings »characterized by a friction between the ski boot sole and ski (10) that reduces at least when loaded with the body weight of the ski » runner at the point of the ball of the foot on the boot sole adjacent part (10) and by a means (12, 22) sum fastening this part (10) on the ski surface at a point below the "ball" where the part (10) that lowers the belly is made of a flexible one leaf-shaped upper part (17) and arranged below «lubricant (18) consists. 2. Safety device according to spoke 1, thereby marked · = «• refuses that the part (10) which reduces the animation a base plate (16) from im. essential the same Width as the ski (11), which is attached to the ski Is at least partially covered by the leaf-shaped upper part (17), so that this upper part (17) relative to the base plate (16) is movable, and that the Sehmiermittel (18) between the leaf-shaped upper part (17) and the base plate (16) arranged 1st. 209816/0217 ~ 24 - 2ο Safety device according to claim 3, characterized * that the outer areas (19) of the leaf-shaped upper part (17) are folded over under the base plate near the inside, so that the folds (20) of the upper part (17) outwards over the outer edge of the base plate (16) protrude, whereby the leaf-shaped upper part (17) is made of an elastic material, so that when the skier is relieved of the stress of the skier, the deformed shape returns to its original shape _{or the like} 4ο safety device naoh claim 2 or J, thereby characterized in that the base plate (16) is provided with several holes and guided through these holes Screws (12) is screwed onto the ski surface » 5ο safety device according to claim 2 or 3, thereby characterized in that the base plate (16) by a Adhesive layer (22) is connected to the ski surface 1st. 6ο Safety device according to Claim 5, thereby identified « zelohnet that the adhesive layer (22) from one to the Underside of the plate (16) applied self-adhesive Glue. 209816/0217 BATH OWQINAL 7c safety device according to one of claims 2 to 6, characterized in that the base plate consists of a porous bronze plate (16b) and the lubricant (18) consists of oil 8 "Safety" device according to claim 1, characterized in that " seiebnet that the friction-reducing part (10) from a «flat cushion (23) which is closed on all sides of 1 «essentially the same width as the ski (11) consists of what old a »lubricant (18) is filled and coated with an adhesive layer (22) with the ski (11) glued 1st, 9 «Safety device according to claim 8, characterized in that that the transversely sum ski (11) running edges (2 ^) of the pillow (2?) To facilitate a lateral Deformation of the cushion is more resilient than the rest of the J parts of the cushion » 10.Safety device according to claim 9, characterized in that that the cushion (23) on a base plate (16) of i «substantially the same width as the ski (11) is glued and protrudes slightly outward beyond the edges of the base plate (16) running parallel to the ski 209816/0217 ^BAD and that the base plate (16) is covered by elae adhesive (22) can be glued to the ski 1st. "Please take precautions according to one of claims 8 to 10, characterized in that the adhesive layer (22) consists of a self-adhesive adhesive. sut sch « 209816/0217