CA1270867A - Ski to be used in combination with a supporting plate receiving component parts of the ski binding - Google Patents
Ski to be used in combination with a supporting plate receiving component parts of the ski bindingInfo
- Publication number
- CA1270867A CA1270867A CA000495276A CA495276A CA1270867A CA 1270867 A CA1270867 A CA 1270867A CA 000495276 A CA000495276 A CA 000495276A CA 495276 A CA495276 A CA 495276A CA 1270867 A CA1270867 A CA 1270867A
- Authority
- CA
- Canada
- Prior art keywords
- ski
- supporting plate
- clamping location
- flexibility measured
- supporting
- 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.)
- Expired - Fee Related
Links
Classifications
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
- A63C9/00—Ski bindings
- A63C9/003—Non-swivel sole plate fixed on the ski
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
- A63C5/00—Skis or snowboards
- A63C5/06—Skis or snowboards with special devices thereon, e.g. steering devices
- A63C5/075—Vibration dampers
Abstract
ABSTRACT:
Ski (1) to be used in combination with a supporting plate (2) receiving component parts of the ski binding where in skis having a normal length (1N) of more than 170 cm, particularly in skis for alpine or downhill skiing, the ratio of the flexibility measured from a clamping location (6) located at a distance of one third of the ski length from the ski tip, to the flexibility measured from a central clamping location (5) up to the ski tip, is adjusted to a value between 1.9 and 2.8, preferably 2.2 to 2.6, and the ratio of the flexibility measured from a clamping location located at 0.3 1N-12 cm from the end portion of the ski, to the flexibility measured from a central clamping location (5) up to the end portion of the ski, is adjusted to a value between 2.2 and 3.1, preferably 2.4 to 2.8, through which the load distribution is optimized over the length of the ski (1) and better guiding and damping characteristics are feasible.
In a preferred embodiment the supporting plate (2) is at least on one end pivotally linked and/or shiftably in longitudinal direction of the ski (1) connected with the upper part of the ski and is supported on the ski (1) (Fig. 1).
Ski (1) to be used in combination with a supporting plate (2) receiving component parts of the ski binding where in skis having a normal length (1N) of more than 170 cm, particularly in skis for alpine or downhill skiing, the ratio of the flexibility measured from a clamping location (6) located at a distance of one third of the ski length from the ski tip, to the flexibility measured from a central clamping location (5) up to the ski tip, is adjusted to a value between 1.9 and 2.8, preferably 2.2 to 2.6, and the ratio of the flexibility measured from a clamping location located at 0.3 1N-12 cm from the end portion of the ski, to the flexibility measured from a central clamping location (5) up to the end portion of the ski, is adjusted to a value between 2.2 and 3.1, preferably 2.4 to 2.8, through which the load distribution is optimized over the length of the ski (1) and better guiding and damping characteristics are feasible.
In a preferred embodiment the supporting plate (2) is at least on one end pivotally linked and/or shiftably in longitudinal direction of the ski (1) connected with the upper part of the ski and is supported on the ski (1) (Fig. 1).
Description
1~7(~i7 SKI TO ~E USED IN COI~BINATION WITH A ~UPPORTING PIATE
R~CEIVING COMPO~NT PAR~S 0~ ~HE S~ INDING
B.~CKGROUND OF ~HE INVENTION
Field of the invention The invention relates to a ski to be used in combination with a supporting plate receiving component parts of the s~i binding.
Description of the Prior Art Such skis have already been described in DE~OS 2 259 375, for example. In this known ski a supporting plate is located on the top surface of the ski and is connected with the ski in a prestressed condition like an arcuately bent spring. Be-tween the supporting plate and the ski there are vibration damping elements being rigidly connected to the supporting plate, with the object of the proposed design being to im-prove the dirigibility and guiding properties of skis. The kinematics of the pivotal connection of the supporting plate on the top surface of the ski shall therefore, according to this known proposal, be such that normal load results in a hollow contact of the ski. This means that, apart from the relatively high tension forces of the spring, a well-dosed engagement of the ski edges in the middle portion of the ski must be dispensed with at the same time, so that the action of the load is in load condition exclusively restricted to the area of the joints of the supporting plate, whereby the properties of the ski for running straight forward might be improved in the first line.
~ j ~270867 US-PS 32 60 531 and US-PS 32 60 532 show already dif-ferent designs for the location of supPOrting plates on skis, by ~hich the distribution of the pressure introduced into the ski has already been shifted from the middle into a front and rear portion. These designs, too, which pro-vide no modif~ation in the design of the ski itself, im-prove the properties of the ski for running straight for-ward~ above all, but not its dirigibility and guiding pro-perties in any skiing situations. The vibration damping properties are altered by a damping supporting plate in another known design according to WO 83/3360.
Summar~ of the Invention ~he invention aims at improving a device of the initially mentioned type in a manner that the kinematics of the ski is not substantially influenced but that the load distribution over the length of the ski is well im-proved and better guiding and vibration damping proper-ties can be achieved altogether. For solving this task the invention essentially consists in that in skis having a normal length (lN) of more than 170 cm, particularly in skis for alpine or downhill skiing, the r.atio of the flexibility measured from a clamping location located at a distance of one third of the normal length of the ski from the ski tip, to the flexibility measured from a central clamping location up to the ski tip, is ad-justed to a value between 1.9 and 2.8, preferably 2.2 to 2.6, and in that the ratio of the flexibility measured from a clamping location located at a distance of 0.3 lN
-12 cm from the end portion of the ski, to the flexibility measured from a central clamping location up to the end portion of the ski, is adjusted to a value between 2.2 and 3.1, preferably 2.4 to 2.8.
By such dimensioning the central ~ortion of the ski is, when compared with known skis, given greater yielding properties relative to the shovel portion and the rear end portion. In a supporting plate serving essentially as a pressure distributing plate the forces are introduced mainly at two locations that are spatiallv separated one from the other and staggered in longitudinal direction of the ski, so that in load condition the whole length of the ski may always be utilized for the dirigibility.
In order to further improve the dirigibility, the design is preferably made in a manner that the ski is designed with constant bending resistance in its central portion over a length of 30 to 45 cm at both sides of the middle of the supporting lengths, with preferably the middle of the portion of the supporting length being located within a distance of lA/2 + 5 cm from the rear end of the ski and with lA being the normal length lN
reduced by 28 cm. Such an arrangement provided also the best adjustability of the damping qualities and of the lZ708~7 pressure distribution by choosing suitable supporting plates.
It was possible to obtain particularly good dirigi-bility and an improvement of the subjective skiing im-pression by means of a design in which the bending re-sistance is chosen in the central portion between 3.5 x 10 and 6.5 x 1 o8 Ncm2 and in which, compared to con-ventional skis of the same category and length, the bending resistance is reduced by at least 20, preferably 10 by 25 to 40 ~er cent. Here the flexibility to the rear end or to the tip was altered by means of reducing the core height at unaltered load-bearing members such as laminates for the upper and lower belts and/or reducing the thickness or rigidity of stiffening intermediate layers such as, e.g., laminates for the upper and lower belts. "Upper belts" and "lower belts" are those layers of the ski which take up forces in longitudinal direction.
lX708~i7 Thi~ is, in contrast to k~own proposals, not made sure b~ means of a prestressed plate but by a suitable design of the ski itself and b~ means of a support-ing plate slideabl~ supported on the ski at least at one end, for which purpose the supporting plate is preferably designed for being connected with the top surface of the ski at at least ~ne end in a pivotable manner and/or for being shiftable in longitudinal direction of the ski and is supported on the ski and is in non-loaded condition located at a distance from the top surface of the ski between said both supporting locations. While in known skîs a prestressed plate : substantially introduces a pressure load into the shovel portionand the rear of the ski, the inventive design of the ski provides the possibility to distribute the pressure over a great area of the ski, noting that, in contrast with pre-stressed plates, the pressure distribution over the distance between both supporting locations remains adjustable on account of the supporting plate being slideably supported.
For this purpose, the supporting plate ma~ comprise pressure distributing elements, in particular resilient elements, at its side facing the top surface of the ski, and the pressure distributin~ elements ma~, in non-loaded condition completel~
fill the free gap between the supporting plate and the top surface of the ski. It is ,just the comPlete filling of the free gap between the supporting plate and the top surface of the ski which is of particular importance on account of the fact that otherwise snow and ice might enter this free gap 1~70867 _ 6 _ thereby substantia]ly influencing the pressure distribution .
The resulting shock absorption ~rin~s ~bout a greater smoothness on skiing and reduces the danger of falling down.
Since the inventive supporting plate, on account of the design of the ski, rests on the ski without any prestress and is even in sliding contact with it at one of its two supporting locations, the pressure distributing elements may be inter-changeable and/or ~e designed for being adjustable with respect to their elastic properties. It is a substantial premise for the desired improvement of the dirigibilit~ that the design according to the invention is given a greater ~ieldability in the middle portion and that the shovel area of the ski itself is given a greater stiffness, ~^Jhich can, for . .
example, be made sure by selecting suitable insert members in the construction of the ski_ ~he essential advantage .
obtained b~ this pressure distribution consists in that high load peaks can be avoided which could compress the snow and would result in bad sliding properties. With a flat pressure distribution, in particular within the middle portion of the ski, substantially improved sliding properties result on account of e~ualization of the compressing pressure per unit area and on flat runwavs the ski can be run substantial-ly faster than comparable skis of conventional construction, even if such conventional skis have a binding plate placed thereon.
~ he construction according to the invention is of par-ticular advantage primarily for skis for the target group S, A, 1270~67 ~, J, and having a leng-th of more than 170 cm. In p~inciple, the invention can also be applied to sl-is having a length of less than 170 cm, in particular to skis for young people, thereby advantageously using the preferred values for the ratios of flexibility.
For obtaining the good properties with respect to dirigi-bility in an unrestricted manner, the supporting plate has a relatively high bending stiffness and torsional stiffness.
The bending elasticity of the supporting plate shall advantageously be chosen in a way that on statically loading a supporting plate with half of the body weight of the skis, a deflection is brought about which does not result in a direct contact of the central portion of the supporting plate on the central portion of the ski. In this case, it is suf-ficient to presume an average mean body weight, because this assumption makes sure that on occasion of a weight shift, which unavoidably results in more than half the body weight acting on one ski, the dirigibility is, in fact, substantially improved.
For improving the torsional stiffness, the supporting plate may comprise stiffening elements transversely extend-ing relative to the longitudinal axis of the supporting plate and ma~ in particular)comprise supporting elements acting on levers slideabl~ supported on the ski.
A further possibility for adjusting the properties with respect to dirigibility results in that the supportin~
plate is, in a simple manner~ releaseabl~ and removably ~270867 fixed on the sl~i,so that supporting plates of different bending stiffness can be used. For this purPose, the supportin~ plate is held in releaseable locking elements in a pivotable manner and/or shiftable in its longi-tudinal direction.
Brief Descri~tion of the Drawing In the following, the invention is further explained with reference to diagrams showing the pressure distribution over the length of the ski and with reference to longitudinal sections throu~h a ski comprising a supporting plate accord-in~ to the invention. In the drawing ~ i~ure ~ schematicall~ indicates a lon~itudinal section through a ski comprising a supporting plate, ~ igure 2 shows the pressure relations along the length of the ski when usin~ a usual running ski, ~ igure 3 shows the analogous pressure relations in an inventive ski comprising a supportin~ plate -without dam~- -ing inserts, ~ igure 4 shows the influence of various ~ ing inserts in a ski desi~nëd in correspondence with the pressure distribution shown in Fi~ure 3, ~i~ure 5 shows a longitudinal section through a ski having a modified construction of the pivotal connection of the supporting plate and ~i~ure 6 shows in an enlarged scale a detail of ~igure 5.
Detailed Descri~tion of the Preferred Embodiments ~i~ure 1 shows a ski 1 having a supporting plate 2 1~7086~
pivotallJ connected fo~ being swivelled around a rear pivo~al axis 3~.~tthe front area the supportin~ plate is supported on a bearin~ point 4 for bein~ slideable rela~ive to the ski.
In acco~dance with ~NORM ~ 4022 (~NORM = Austrian Standard) and ISO S 902-1980(E), the flexibility values are such that the ski is clamped first in its central portion indicated by the transversal plan 5 and the bending of the ski is measured up to near the shovel portion and up to near the rear portion, re-spectively, depending on the load at these portions. Subsequent-ly, a second measurement is performed,in which the ski is clamped at a distance of approximately Gne third from the rear end and of the shovel end of the ski, respectively, with the corresponding transversal planes being schematically indicated by 6. Here, too, the obtained bend is measured again in dependence to the load up to the rear portion or up to the shovel portion of the ski, whereby a relatively exact picture relative to the flexi-bility behaviour can be obtained. According to the invention, the design is chosen in a way that the central portion of the ski is given greater yieldability and the shovel portion and the rear end portion, respectively, is given greater stiffness than in conventional skis. Figure 2 shows the pressure distri-bution curve along the length of the ski of a conventional run-ning ski. The load applied was a force of 300 N, and the curve 7 shows the load distribution from the ski shovel up to the rear ski end and performing the measurement without ski boot, 1~70867 -- ~o --whereas the cu~ve 8 shows the same relations wlth moun~d ski boot. This curve for load conditions shows that, with a conveiltionall~ desi~ned ski, a distinct load peak can be o~served in the middle area of the ski, which load peak sub-stantially detract s ~rom the sliding properties. In con-trast thereto, the pressure distribution is completely different in a ski according to the invention, as is shown in Figure 3. By the softer design within the ranges defined by the ratio of the flexibility characteristics, even without a supporting plate mounted, a distinct shift of the elastic properties results, and if a yoke is used or a supporting plate that is slideably supported on the ski at least at one end, a far-reaching equali-zation of the pressure distribution can be achieved by selecting suitable pressure distribution elements provided beneath this supporting plate. On account of the inventive dimensioning of the flexibility of the ski for providing relatively more stiff end portions and a softer central portion, the ski shows, without using pressure distributing elements and only with a supparting plate mounted, two su~tan-tially less distinct peaks 10 and 11 of curve 9 which? when compared with the peak of the curve 8 and the curve 7 in Fig. 2, are substantially more flat. ~he load selected was again a load of 300 N, noting that the curve 9 shows the con-ditions as measvred without ski boot and the curve 12shows the conditions as measured with the ski boot mounted.
If now, as is made clear in ~igure ~, pressure distributing lZ70867 ele~ents are interpositioned beneath the supporting plate, the immediatearea bet~leen said both pea~s can be furthe~
flattened and by selecting suitable pressure distributing elements, a pressure distribution can be adjusted for one and the same ski that corresponds to that of a running ski and relatively flat pressure distributions as are desirable for good sliding properties. ~he curves shown in Figure 4 were measured by interpositioning different tapes of foamed rubber having different length, noting that the curve 13 correspon~s to tapes of foamed rubber having a cross sectional area of 1x1 cm2 and a length of 2.5 cm.
The curve 14 was obtained ~hen correspondingl~ increasing the length of the tapes of foamed rubber to 5 cm,while curve 15~ curve 16 and curve 17 were obtained when using tapes of foamed rubber having a length of 10 cm, 20 cm and 40 cm, respectivel~, after correspondingl~ compressing same. The result is that the insertion of strongly com-pressed pressure distributing elements causes the occur-rence of a relatively characteristic peak in the middle portion, analogous to that of Figure 2 in the central portion.The design is, however, still improved as compared with the conventional running ski according to Fig. 2 insofar as the lateral slope.s have a greater lateral extent and the pressure distribution extends over a greater portion of the ski despite the peak existing in the middle portion. In In connection with curve 13, based on an i.nsert of foamed material having a length of only 2.5 cm and having been positioned beneath the supporting ~270867 plate, there results a balanced and relativel~ uniform central~ortion which allows to obtain good sliding properties and correspondin~ ood properties with respect to dirigi-bilit~, without havin~ to renounce a ~ood en~agement of the ski ed~es within the central area.
In ~i~ure 5, the ski is again desi~nated b~ 1. The supporting plate 2 has supporting elements 18 extendin~ in transverse direction to the lon~itudinal axis of the support-ing plate and being acted upon b~ links 19, the free ends of which are supported in bearing blocks 20 for being shiftable in longitudinal direction. The front end 21 of the support-ing plate 2 extends below a bearing block 22 having at its upper side a slide member 23 for releasinK the supportin~
plate 2. The rear end 24 of this supporting plate is like-wise held within a bearin~ block 25 carr~ing a resilient ordamping element 26 which can attenuate bending of the supporting plate 2 in direction to contacting the top surface of the ski 1 .
In the representation according to ~igure 6, it is shown that the supporting element 18 is formed of a bolt extending through a recess within the supporting plate and having connected to its end surfaces the links 19 in a .
manner secured against relative rotation, so that the whole length of the bolt is at disposal as a bearing surface. The free ends of the links 1 9 carr~ pins 27 intended for sliding engagement within the bearing blocks 20.
lZ70867 THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1, Ski to be used in combination with a supporting plate receiving component parts of the ski binding, characterized in that in skis having a normal length (lN) of more than 170 cm, particularly in skis for alpine or downhill skiing, the ratio of the flexibility measured from a clamping location located at a distance of one third of the normal length of the ski from the ski tip, to the flexibility measured from a central clamping location up to the ski tip, is adjusted to a value between 1.9 and 2.8, and in that the ratio of the flexibility measured from a clamping location located at a distance of 0.3 lN -12 cm from the end portion of the ski, to the flexibility measured from a central clamping location up to the end portion of the ski, is adjusted to a value between 2.2 and 3.1.
R~CEIVING COMPO~NT PAR~S 0~ ~HE S~ INDING
B.~CKGROUND OF ~HE INVENTION
Field of the invention The invention relates to a ski to be used in combination with a supporting plate receiving component parts of the s~i binding.
Description of the Prior Art Such skis have already been described in DE~OS 2 259 375, for example. In this known ski a supporting plate is located on the top surface of the ski and is connected with the ski in a prestressed condition like an arcuately bent spring. Be-tween the supporting plate and the ski there are vibration damping elements being rigidly connected to the supporting plate, with the object of the proposed design being to im-prove the dirigibility and guiding properties of skis. The kinematics of the pivotal connection of the supporting plate on the top surface of the ski shall therefore, according to this known proposal, be such that normal load results in a hollow contact of the ski. This means that, apart from the relatively high tension forces of the spring, a well-dosed engagement of the ski edges in the middle portion of the ski must be dispensed with at the same time, so that the action of the load is in load condition exclusively restricted to the area of the joints of the supporting plate, whereby the properties of the ski for running straight forward might be improved in the first line.
~ j ~270867 US-PS 32 60 531 and US-PS 32 60 532 show already dif-ferent designs for the location of supPOrting plates on skis, by ~hich the distribution of the pressure introduced into the ski has already been shifted from the middle into a front and rear portion. These designs, too, which pro-vide no modif~ation in the design of the ski itself, im-prove the properties of the ski for running straight for-ward~ above all, but not its dirigibility and guiding pro-perties in any skiing situations. The vibration damping properties are altered by a damping supporting plate in another known design according to WO 83/3360.
Summar~ of the Invention ~he invention aims at improving a device of the initially mentioned type in a manner that the kinematics of the ski is not substantially influenced but that the load distribution over the length of the ski is well im-proved and better guiding and vibration damping proper-ties can be achieved altogether. For solving this task the invention essentially consists in that in skis having a normal length (lN) of more than 170 cm, particularly in skis for alpine or downhill skiing, the r.atio of the flexibility measured from a clamping location located at a distance of one third of the normal length of the ski from the ski tip, to the flexibility measured from a central clamping location up to the ski tip, is ad-justed to a value between 1.9 and 2.8, preferably 2.2 to 2.6, and in that the ratio of the flexibility measured from a clamping location located at a distance of 0.3 lN
-12 cm from the end portion of the ski, to the flexibility measured from a central clamping location up to the end portion of the ski, is adjusted to a value between 2.2 and 3.1, preferably 2.4 to 2.8.
By such dimensioning the central ~ortion of the ski is, when compared with known skis, given greater yielding properties relative to the shovel portion and the rear end portion. In a supporting plate serving essentially as a pressure distributing plate the forces are introduced mainly at two locations that are spatiallv separated one from the other and staggered in longitudinal direction of the ski, so that in load condition the whole length of the ski may always be utilized for the dirigibility.
In order to further improve the dirigibility, the design is preferably made in a manner that the ski is designed with constant bending resistance in its central portion over a length of 30 to 45 cm at both sides of the middle of the supporting lengths, with preferably the middle of the portion of the supporting length being located within a distance of lA/2 + 5 cm from the rear end of the ski and with lA being the normal length lN
reduced by 28 cm. Such an arrangement provided also the best adjustability of the damping qualities and of the lZ708~7 pressure distribution by choosing suitable supporting plates.
It was possible to obtain particularly good dirigi-bility and an improvement of the subjective skiing im-pression by means of a design in which the bending re-sistance is chosen in the central portion between 3.5 x 10 and 6.5 x 1 o8 Ncm2 and in which, compared to con-ventional skis of the same category and length, the bending resistance is reduced by at least 20, preferably 10 by 25 to 40 ~er cent. Here the flexibility to the rear end or to the tip was altered by means of reducing the core height at unaltered load-bearing members such as laminates for the upper and lower belts and/or reducing the thickness or rigidity of stiffening intermediate layers such as, e.g., laminates for the upper and lower belts. "Upper belts" and "lower belts" are those layers of the ski which take up forces in longitudinal direction.
lX708~i7 Thi~ is, in contrast to k~own proposals, not made sure b~ means of a prestressed plate but by a suitable design of the ski itself and b~ means of a support-ing plate slideabl~ supported on the ski at least at one end, for which purpose the supporting plate is preferably designed for being connected with the top surface of the ski at at least ~ne end in a pivotable manner and/or for being shiftable in longitudinal direction of the ski and is supported on the ski and is in non-loaded condition located at a distance from the top surface of the ski between said both supporting locations. While in known skîs a prestressed plate : substantially introduces a pressure load into the shovel portionand the rear of the ski, the inventive design of the ski provides the possibility to distribute the pressure over a great area of the ski, noting that, in contrast with pre-stressed plates, the pressure distribution over the distance between both supporting locations remains adjustable on account of the supporting plate being slideably supported.
For this purpose, the supporting plate ma~ comprise pressure distributing elements, in particular resilient elements, at its side facing the top surface of the ski, and the pressure distributin~ elements ma~, in non-loaded condition completel~
fill the free gap between the supporting plate and the top surface of the ski. It is ,just the comPlete filling of the free gap between the supporting plate and the top surface of the ski which is of particular importance on account of the fact that otherwise snow and ice might enter this free gap 1~70867 _ 6 _ thereby substantia]ly influencing the pressure distribution .
The resulting shock absorption ~rin~s ~bout a greater smoothness on skiing and reduces the danger of falling down.
Since the inventive supporting plate, on account of the design of the ski, rests on the ski without any prestress and is even in sliding contact with it at one of its two supporting locations, the pressure distributing elements may be inter-changeable and/or ~e designed for being adjustable with respect to their elastic properties. It is a substantial premise for the desired improvement of the dirigibilit~ that the design according to the invention is given a greater ~ieldability in the middle portion and that the shovel area of the ski itself is given a greater stiffness, ~^Jhich can, for . .
example, be made sure by selecting suitable insert members in the construction of the ski_ ~he essential advantage .
obtained b~ this pressure distribution consists in that high load peaks can be avoided which could compress the snow and would result in bad sliding properties. With a flat pressure distribution, in particular within the middle portion of the ski, substantially improved sliding properties result on account of e~ualization of the compressing pressure per unit area and on flat runwavs the ski can be run substantial-ly faster than comparable skis of conventional construction, even if such conventional skis have a binding plate placed thereon.
~ he construction according to the invention is of par-ticular advantage primarily for skis for the target group S, A, 1270~67 ~, J, and having a leng-th of more than 170 cm. In p~inciple, the invention can also be applied to sl-is having a length of less than 170 cm, in particular to skis for young people, thereby advantageously using the preferred values for the ratios of flexibility.
For obtaining the good properties with respect to dirigi-bility in an unrestricted manner, the supporting plate has a relatively high bending stiffness and torsional stiffness.
The bending elasticity of the supporting plate shall advantageously be chosen in a way that on statically loading a supporting plate with half of the body weight of the skis, a deflection is brought about which does not result in a direct contact of the central portion of the supporting plate on the central portion of the ski. In this case, it is suf-ficient to presume an average mean body weight, because this assumption makes sure that on occasion of a weight shift, which unavoidably results in more than half the body weight acting on one ski, the dirigibility is, in fact, substantially improved.
For improving the torsional stiffness, the supporting plate may comprise stiffening elements transversely extend-ing relative to the longitudinal axis of the supporting plate and ma~ in particular)comprise supporting elements acting on levers slideabl~ supported on the ski.
A further possibility for adjusting the properties with respect to dirigibility results in that the supportin~
plate is, in a simple manner~ releaseabl~ and removably ~270867 fixed on the sl~i,so that supporting plates of different bending stiffness can be used. For this purPose, the supportin~ plate is held in releaseable locking elements in a pivotable manner and/or shiftable in its longi-tudinal direction.
Brief Descri~tion of the Drawing In the following, the invention is further explained with reference to diagrams showing the pressure distribution over the length of the ski and with reference to longitudinal sections throu~h a ski comprising a supporting plate accord-in~ to the invention. In the drawing ~ i~ure ~ schematicall~ indicates a lon~itudinal section through a ski comprising a supporting plate, ~ igure 2 shows the pressure relations along the length of the ski when usin~ a usual running ski, ~ igure 3 shows the analogous pressure relations in an inventive ski comprising a supportin~ plate -without dam~- -ing inserts, ~ igure 4 shows the influence of various ~ ing inserts in a ski desi~nëd in correspondence with the pressure distribution shown in Fi~ure 3, ~i~ure 5 shows a longitudinal section through a ski having a modified construction of the pivotal connection of the supporting plate and ~i~ure 6 shows in an enlarged scale a detail of ~igure 5.
Detailed Descri~tion of the Preferred Embodiments ~i~ure 1 shows a ski 1 having a supporting plate 2 1~7086~
pivotallJ connected fo~ being swivelled around a rear pivo~al axis 3~.~tthe front area the supportin~ plate is supported on a bearin~ point 4 for bein~ slideable rela~ive to the ski.
In acco~dance with ~NORM ~ 4022 (~NORM = Austrian Standard) and ISO S 902-1980(E), the flexibility values are such that the ski is clamped first in its central portion indicated by the transversal plan 5 and the bending of the ski is measured up to near the shovel portion and up to near the rear portion, re-spectively, depending on the load at these portions. Subsequent-ly, a second measurement is performed,in which the ski is clamped at a distance of approximately Gne third from the rear end and of the shovel end of the ski, respectively, with the corresponding transversal planes being schematically indicated by 6. Here, too, the obtained bend is measured again in dependence to the load up to the rear portion or up to the shovel portion of the ski, whereby a relatively exact picture relative to the flexi-bility behaviour can be obtained. According to the invention, the design is chosen in a way that the central portion of the ski is given greater yieldability and the shovel portion and the rear end portion, respectively, is given greater stiffness than in conventional skis. Figure 2 shows the pressure distri-bution curve along the length of the ski of a conventional run-ning ski. The load applied was a force of 300 N, and the curve 7 shows the load distribution from the ski shovel up to the rear ski end and performing the measurement without ski boot, 1~70867 -- ~o --whereas the cu~ve 8 shows the same relations wlth moun~d ski boot. This curve for load conditions shows that, with a conveiltionall~ desi~ned ski, a distinct load peak can be o~served in the middle area of the ski, which load peak sub-stantially detract s ~rom the sliding properties. In con-trast thereto, the pressure distribution is completely different in a ski according to the invention, as is shown in Figure 3. By the softer design within the ranges defined by the ratio of the flexibility characteristics, even without a supporting plate mounted, a distinct shift of the elastic properties results, and if a yoke is used or a supporting plate that is slideably supported on the ski at least at one end, a far-reaching equali-zation of the pressure distribution can be achieved by selecting suitable pressure distribution elements provided beneath this supporting plate. On account of the inventive dimensioning of the flexibility of the ski for providing relatively more stiff end portions and a softer central portion, the ski shows, without using pressure distributing elements and only with a supparting plate mounted, two su~tan-tially less distinct peaks 10 and 11 of curve 9 which? when compared with the peak of the curve 8 and the curve 7 in Fig. 2, are substantially more flat. ~he load selected was again a load of 300 N, noting that the curve 9 shows the con-ditions as measvred without ski boot and the curve 12shows the conditions as measured with the ski boot mounted.
If now, as is made clear in ~igure ~, pressure distributing lZ70867 ele~ents are interpositioned beneath the supporting plate, the immediatearea bet~leen said both pea~s can be furthe~
flattened and by selecting suitable pressure distributing elements, a pressure distribution can be adjusted for one and the same ski that corresponds to that of a running ski and relatively flat pressure distributions as are desirable for good sliding properties. ~he curves shown in Figure 4 were measured by interpositioning different tapes of foamed rubber having different length, noting that the curve 13 correspon~s to tapes of foamed rubber having a cross sectional area of 1x1 cm2 and a length of 2.5 cm.
The curve 14 was obtained ~hen correspondingl~ increasing the length of the tapes of foamed rubber to 5 cm,while curve 15~ curve 16 and curve 17 were obtained when using tapes of foamed rubber having a length of 10 cm, 20 cm and 40 cm, respectivel~, after correspondingl~ compressing same. The result is that the insertion of strongly com-pressed pressure distributing elements causes the occur-rence of a relatively characteristic peak in the middle portion, analogous to that of Figure 2 in the central portion.The design is, however, still improved as compared with the conventional running ski according to Fig. 2 insofar as the lateral slope.s have a greater lateral extent and the pressure distribution extends over a greater portion of the ski despite the peak existing in the middle portion. In In connection with curve 13, based on an i.nsert of foamed material having a length of only 2.5 cm and having been positioned beneath the supporting ~270867 plate, there results a balanced and relativel~ uniform central~ortion which allows to obtain good sliding properties and correspondin~ ood properties with respect to dirigi-bilit~, without havin~ to renounce a ~ood en~agement of the ski ed~es within the central area.
In ~i~ure 5, the ski is again desi~nated b~ 1. The supporting plate 2 has supporting elements 18 extendin~ in transverse direction to the lon~itudinal axis of the support-ing plate and being acted upon b~ links 19, the free ends of which are supported in bearing blocks 20 for being shiftable in longitudinal direction. The front end 21 of the support-ing plate 2 extends below a bearing block 22 having at its upper side a slide member 23 for releasinK the supportin~
plate 2. The rear end 24 of this supporting plate is like-wise held within a bearin~ block 25 carr~ing a resilient ordamping element 26 which can attenuate bending of the supporting plate 2 in direction to contacting the top surface of the ski 1 .
In the representation according to ~igure 6, it is shown that the supporting element 18 is formed of a bolt extending through a recess within the supporting plate and having connected to its end surfaces the links 19 in a .
manner secured against relative rotation, so that the whole length of the bolt is at disposal as a bearing surface. The free ends of the links 1 9 carr~ pins 27 intended for sliding engagement within the bearing blocks 20.
lZ70867 THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1, Ski to be used in combination with a supporting plate receiving component parts of the ski binding, characterized in that in skis having a normal length (lN) of more than 170 cm, particularly in skis for alpine or downhill skiing, the ratio of the flexibility measured from a clamping location located at a distance of one third of the normal length of the ski from the ski tip, to the flexibility measured from a central clamping location up to the ski tip, is adjusted to a value between 1.9 and 2.8, and in that the ratio of the flexibility measured from a clamping location located at a distance of 0.3 lN -12 cm from the end portion of the ski, to the flexibility measured from a central clamping location up to the end portion of the ski, is adjusted to a value between 2.2 and 3.1.
2. Ski as claimed in claim 1, characterized in that the ski is designed with constant bending resistance in its central portion over a length of 30 to 45 cm at both sides of the middle of the supporting length.
3. Ski as claimed in claim 2, characterized in that the middle of the central portion of the supporting length is located within a distance of lA/2 + 5 cm from the rear end of the ski, with lA being the normal length lN reduced by 28 cm.
i2708~;7
i2708~;7
4. Ski as claimed in one of the claims 1, 2 or 3, characterized in that the bending resistance is chosen in the central portion between 3.5 x 108 and 6.5 x 108 Ncm and in which, compared to conventional skis of the same category and length, the bending resistance is reduced by at least 20, preferably by 25 to 40 per cent.
5. Ski as claimed in claim 1, characterized in that the alteration of the flexibility to the rear end or to the tip is adjusted by reducing the core height at unaltered load-bearing members such as laminates for the upper and lower belts and/or reducing the thickness or rigidity of stiffening intermediate layers such as, e.g., laminates for the upper and lower belts.
6. Ski as claimed in claim 1 and comprising a supporting plate within the central area of the ski, characterized in that the supporting plate is at at least one end pivotally and/or in longitudinal direction of the ski shiftably connectable with the top surface of the ski and is secured in position on the ski and is, in non-loaded condition, located at a distance from the top surface of the ski between said both supporting locations.
7. Ski as claimed in claim 1, characterized in that the supporting plate comprises pressure distributing elements, in particular resilient elements, at its side facing the top surface of the ski.
B
B
Claims
8. Ski as claimed in claim 1, characterized in that the pressure distributing elements completely fill, in non-loaded condition, the free space between the supporting plate and the top surface of the ski.
9. Ski as claimed in claim 1, characterized in that the pressure distributing elements are interchangeable and/or adjustable with respect to their elastic properties.
10. Ski as claimed in claim 1, characterized in that the bending elasticity of the supporting plate is selected such that, in a static condition, loading of a supporting plate with half of the body weight of the skier results in a deflection preventing any direct contact between the central area of the supporting plate and the central area of the ski.
11. Ski as claimed in claim 1, characterized in that the supporting plate comprises supporting elements transversely extending relative to the longitudinal axis of the supporting plate, in particular supporting elements acting on levers slidably supported on the ski.
12. Ski as claimed in claim 1, characterized in that the supporting plate is held within releasable locking elements in a pivotable manner and/or in a manner for being shiftable along its longitudinal axis.
13. Ski as claimed in claim 1, characterized in that the ratio of the flexibility measured from a clamping location located at a distance of one third of the normal length of the ski from the ski tip, to the flexibility measured from a central clamping location up to the ski tip, is preferably adjusted to a value between 2.2 to 2.6.
14. Ski as claimed in claim 1, characterized in that the ratio of the flexibility measured from a clamping location located at a distance of 0.3 1N -12 cm from the end portion of the ski, to the flexibility measured from a central clamping location up to the end portion of the ski, is preferably adjusted to a value between 2.4 to 2.8.
9. Ski as claimed in claim 1, characterized in that the pressure distributing elements are interchangeable and/or adjustable with respect to their elastic properties.
10. Ski as claimed in claim 1, characterized in that the bending elasticity of the supporting plate is selected such that, in a static condition, loading of a supporting plate with half of the body weight of the skier results in a deflection preventing any direct contact between the central area of the supporting plate and the central area of the ski.
11. Ski as claimed in claim 1, characterized in that the supporting plate comprises supporting elements transversely extending relative to the longitudinal axis of the supporting plate, in particular supporting elements acting on levers slidably supported on the ski.
12. Ski as claimed in claim 1, characterized in that the supporting plate is held within releasable locking elements in a pivotable manner and/or in a manner for being shiftable along its longitudinal axis.
13. Ski as claimed in claim 1, characterized in that the ratio of the flexibility measured from a clamping location located at a distance of one third of the normal length of the ski from the ski tip, to the flexibility measured from a central clamping location up to the ski tip, is preferably adjusted to a value between 2.2 to 2.6.
14. Ski as claimed in claim 1, characterized in that the ratio of the flexibility measured from a clamping location located at a distance of 0.3 1N -12 cm from the end portion of the ski, to the flexibility measured from a central clamping location up to the end portion of the ski, is preferably adjusted to a value between 2.4 to 2.8.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ATA3628/84 | 1984-11-15 | ||
| AT362884A AT385667B (en) | 1984-11-15 | 1984-11-15 | SKI FOR USE WITH A PLATE FOR ADAPTING BINDING PARTS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1270867A true CA1270867A (en) | 1990-06-26 |
Family
ID=3553158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000495276A Expired - Fee Related CA1270867A (en) | 1984-11-15 | 1985-11-14 | Ski to be used in combination with a supporting plate receiving component parts of the ski binding |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0182776A3 (en) |
| JP (1) | JPS61125362A (en) |
| AT (1) | AT385667B (en) |
| CA (1) | CA1270867A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5332253A (en) * | 1991-08-27 | 1994-07-26 | Salomon S.A. | Device for the modifying the pressure distribution of a ski along its sliding surface |
| US5437468A (en) * | 1992-02-13 | 1995-08-01 | Blizzard Ges.M.B.H. | Ski |
| US5447322A (en) * | 1990-12-14 | 1995-09-05 | Solomon, S.A. | Ski for winter sports comprising a stiffener and a base |
| US5513872A (en) * | 1991-08-27 | 1996-05-07 | Salomon S.A. | Interface device to modify the natural pressure distribution of a ski on the snow |
| US5556122A (en) * | 1992-01-31 | 1996-09-17 | Salomon S.A. | Device for modifying the force distribution of a ski over its gliding surface and a ski equipped with such a device |
| US5558353A (en) * | 1992-01-31 | 1996-09-24 | Salomon S.A. | Device for modifying the force distribution of a ski over its gliding surface and a ski equipped with such a device |
| US5566966A (en) * | 1991-08-27 | 1996-10-22 | Salomon S.A. | Device for modifying the pressure distribution of a ski along its sliding surface |
| US5636855A (en) * | 1991-12-11 | 1997-06-10 | Salomon S.A. | Apparatus for modifying the pressure distribution of a ski along its sliding surface |
| US5642897A (en) * | 1992-02-18 | 1997-07-01 | Salomon S.A. | Ski brake and device for modifying the natural pressure distribution of a ski over its sliding surface and a ski equipped therewith |
| US5647605A (en) * | 1994-05-16 | 1997-07-15 | Salomon S.A. | Interface apparatus for modifying the natural distribution pressure of a ski such as in particular an alpine ski |
| US5730457A (en) * | 1992-02-18 | 1998-03-24 | Salomen S.A. | Apparatus for modifying the natural pressure distribution of a ski over its gliding surface, and a ski equipped with such apparatus |
Families Citing this family (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT401351B (en) * | 1988-09-30 | 1996-08-26 | Atomic Austria Gmbh | CONNECTING DEVICE FOR HOLDING A SKI BOOT ON A SKI |
| AT405244B (en) * | 1988-09-30 | 1999-06-25 | Atomic Austria Gmbh | Connecting device for holding a ski boot on a ski |
| FR2639242B1 (en) * | 1988-11-18 | 1990-12-28 | Rossignol Sa | PERFECT KIT FOR SKIING, CONSISTING OF A SHOE AND A SKI |
| US5096217A (en) * | 1988-12-01 | 1992-03-17 | Kent Hunter | Monoski with deep side cuts and cambered segment in the binding portion |
| DE3918939A1 (en) * | 1989-06-09 | 1990-12-13 | Look Sa | SNOW SLIDING BOARD WITH TWO BINDINGS |
| FR2649902B1 (en) * | 1989-07-18 | 1992-07-03 | Rossignol Sa | ADDITIONAL DEVICE FOR SKIING ALLOWING THE MOUNTING OF A SET OF FIXINGS OF A SHOE ON A SKI |
| AT405245B (en) * | 1989-11-13 | 1999-06-25 | Varpat Patentverwertung | Ski boot holder device, in particular for attaching a ski boot to a ski |
| FR2657025B1 (en) * | 1990-01-18 | 1993-04-02 | Salomon Sa | DEVICE FOR MOUNTING A SHOE ON A SKI. |
| FR2664504B2 (en) * | 1990-07-11 | 1994-01-14 | Rossignol Sa | ADDITIONAL DEVICE TO SKIING ALLOWING THE MOUNTING OF A SET OF FIXINGS OF A SHOE ON A SKI. |
| FR2675391B1 (en) * | 1991-04-16 | 1994-09-23 | Salomon Sa | WINTER SPORTS SKI COMPRISING A STRAINER AND A BASE. |
| AT403992B (en) * | 1991-02-22 | 1998-07-27 | Head Sport Ag | SKI |
| FR2679147B1 (en) * | 1991-07-17 | 1993-10-08 | Salomon Sa | DEVICE FOR MODIFYING THE PRESSURE DISTRIBUTION OF A SKI ON ITS SLIDING SURFACE. |
| FR2690079B1 (en) * | 1992-04-17 | 1994-07-08 | Salomon Sa | INTERFACE DEVICE FOR MODIFYING THE NATURAL PRESSURE DISTRIBUTION OF A SKI ON ITS SLIDING SURFACE. |
| EP0567780B1 (en) * | 1992-04-17 | 1995-12-27 | Salomon S.A. | Interface device on a ski |
| FR2690078B1 (en) * | 1992-04-17 | 1994-07-08 | Salomon Sa | INTERFACE DEVICE FOR MODIFYING THE NATURAL PRESSURE DISTRIBUTION OF A SKI ON ITS SLIDING SURFACE. |
| AT401009B (en) * | 1992-07-15 | 1996-05-28 | Fischer Gmbh | SKI |
| FR2698553B1 (en) * | 1992-11-27 | 1995-03-10 | Salomon Sa | Interface device between a ski and binding elements. |
| JPH07194767A (en) * | 1993-12-28 | 1995-08-01 | Mizuno Corp | Device for floatingly fitting binding to ski |
| JPH08131606A (en) * | 1994-11-02 | 1996-05-28 | Mizuno Corp | Rigidity adjuster and ski with it |
| FR2740982B1 (en) * | 1995-11-10 | 1997-12-26 | Rossignol Sa | SNOW SNOWBOARD |
| US5779257A (en) * | 1995-12-06 | 1998-07-14 | Marker Deutschland Gmbh | Automatic damping/stiffening system |
| US5681054A (en) * | 1995-12-06 | 1997-10-28 | Marker Deutschland Gmbh | Clutch engageable damping and stiffening system |
| AT409935B (en) * | 1997-08-14 | 2002-12-27 | Atomic Austria Gmbh | DISTRIBUTION DEVICE FOR LOADS AND / OR FORCES TO BE TRANSFERRED TO A SPORTS EQUIPMENT |
| DE19941667C2 (en) * | 1999-09-01 | 2003-08-21 | Johann Reiter | ski binding |
| FR2810559B1 (en) * | 2000-06-23 | 2002-10-11 | Salomon Sa | ALPINE SKI EQUIPPED WITH AN INTERFACE DEVICE |
| JP2008196356A (en) * | 2007-02-09 | 2008-08-28 | Husqvarna Zenoah Co Ltd | Working vehicle for mowing |
| DE102014001548A1 (en) | 2014-02-08 | 2015-08-13 | Horst Linzmeier | Sports equipment |
| US20200210546A1 (en) | 2019-01-02 | 2020-07-02 | Shinc Inc. | Systems and methods for generating a design for a gliding board |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1269049A (en) * | 1960-05-06 | 1961-08-04 | Ski | |
| US3260531A (en) * | 1964-01-31 | 1966-07-12 | Johan G F Heuvel | Terrain-conforming and torsionalresponsive skis |
| US3260532A (en) * | 1965-04-02 | 1966-07-12 | Johan G F Heuvel | Ski binding mounting and runner construction |
| AT302130B (en) * | 1970-09-28 | 1972-10-10 | Smolka & Co Wiener Metall | Soleplate |
| US3817543A (en) * | 1972-07-24 | 1974-06-18 | W Haff | Adjustable harness for ski boot |
| DE2634748A1 (en) * | 1976-01-20 | 1978-02-09 | Hans Meyer | SKI WITH SPRING BOARD |
| DE2752206C3 (en) * | 1977-11-23 | 1986-03-27 | Bernhard 5500 Trier Kirsch | Sole plate for ski bindings |
| ATA92680A (en) * | 1980-02-20 | 1981-08-15 | Blizzard Gmbh | SKI |
| CH671887A5 (en) * | 1982-03-25 | 1989-10-13 | Brosi Bettosini |
-
1984
- 1984-11-15 AT AT362884A patent/AT385667B/en not_active IP Right Cessation
-
1985
- 1985-11-12 EP EP85890280A patent/EP0182776A3/en not_active Withdrawn
- 1985-11-14 CA CA000495276A patent/CA1270867A/en not_active Expired - Fee Related
- 1985-11-15 JP JP25648085A patent/JPS61125362A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5447322A (en) * | 1990-12-14 | 1995-09-05 | Solomon, S.A. | Ski for winter sports comprising a stiffener and a base |
| US5332253A (en) * | 1991-08-27 | 1994-07-26 | Salomon S.A. | Device for the modifying the pressure distribution of a ski along its sliding surface |
| US5513872A (en) * | 1991-08-27 | 1996-05-07 | Salomon S.A. | Interface device to modify the natural pressure distribution of a ski on the snow |
| US5566966A (en) * | 1991-08-27 | 1996-10-22 | Salomon S.A. | Device for modifying the pressure distribution of a ski along its sliding surface |
| US5636855A (en) * | 1991-12-11 | 1997-06-10 | Salomon S.A. | Apparatus for modifying the pressure distribution of a ski along its sliding surface |
| US5556122A (en) * | 1992-01-31 | 1996-09-17 | Salomon S.A. | Device for modifying the force distribution of a ski over its gliding surface and a ski equipped with such a device |
| US5558353A (en) * | 1992-01-31 | 1996-09-24 | Salomon S.A. | Device for modifying the force distribution of a ski over its gliding surface and a ski equipped with such a device |
| US5437468A (en) * | 1992-02-13 | 1995-08-01 | Blizzard Ges.M.B.H. | Ski |
| US5642897A (en) * | 1992-02-18 | 1997-07-01 | Salomon S.A. | Ski brake and device for modifying the natural pressure distribution of a ski over its sliding surface and a ski equipped therewith |
| US5730457A (en) * | 1992-02-18 | 1998-03-24 | Salomen S.A. | Apparatus for modifying the natural pressure distribution of a ski over its gliding surface, and a ski equipped with such apparatus |
| US5647605A (en) * | 1994-05-16 | 1997-07-15 | Salomon S.A. | Interface apparatus for modifying the natural distribution pressure of a ski such as in particular an alpine ski |
Also Published As
| Publication number | Publication date |
|---|---|
| ATA362884A (en) | 1987-10-15 |
| EP0182776A3 (en) | 1987-04-01 |
| AT385667B (en) | 1988-05-10 |
| JPS61125362A (en) | 1986-06-13 |
| EP0182776A2 (en) | 1986-05-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |