EP0151975B1 - Ski de fond - Google Patents

Ski de fond Download PDF

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Publication number
EP0151975B1
EP0151975B1 EP85100663A EP85100663A EP0151975B1 EP 0151975 B1 EP0151975 B1 EP 0151975B1 EP 85100663 A EP85100663 A EP 85100663A EP 85100663 A EP85100663 A EP 85100663A EP 0151975 B1 EP0151975 B1 EP 0151975B1
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EP
European Patent Office
Prior art keywords
ski
slide member
bolt
ski according
upper chord
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
Application number
EP85100663A
Other languages
German (de)
French (fr)
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EP0151975A2 (en
EP0151975A3 (en
Inventor
Klaus Dr. Hölzl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TMC Corp
Original Assignee
TMC Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from AT42584A external-priority patent/AT379743B/en
Priority claimed from AT165684A external-priority patent/AT383495B/en
Application filed by TMC Corp filed Critical TMC Corp
Publication of EP0151975A2 publication Critical patent/EP0151975A2/en
Publication of EP0151975A3 publication Critical patent/EP0151975A3/en
Application granted granted Critical
Publication of EP0151975B1 publication Critical patent/EP0151975B1/en
Expired legal-status Critical Current

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    • 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
    • A63C9/20—Non-self-releasing bindings with special sole edge holders instead of toe-straps
    • 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
    • A63C5/07—Skis or snowboards with special devices thereon, e.g. steering devices comprising means for adjusting stiffness
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C7/00—Devices preventing skis from slipping back; Ski-stoppers or ski-brakes
    • A63C7/005—Devices preventing skis from slipping back, actuated by the boot

Definitions

  • the invention relates to a ski, in particular a cross-country ski, according to the first part of claim 1.
  • a ski of the type mentioned at the outset is described in FR-A-1 467141 (see FIG. 2).
  • This ski has three bores extending in the longitudinal direction of the ski.
  • one or more rods made of steel, a light metal alloy or synthetic resin can be inserted into one or more of these holes.
  • the rod is held in the hole by means of a grub screw which is screwed into the end of the hole.
  • this embodiment has the disadvantage that the flexural rigidity of the ski can only be changed gradually and not continuously by inserting or removing the rods. Furthermore, the rods that are not used must always be carried by the user.
  • FR-A-1 109 560 two steel strips are used to change the flexural rigidity of the ski, some of which run on the top of the ski and partly in a slot in the middle area below the binding (see FIGS. 1 and 2).
  • These steel straps are anchored at one end to the ends of the ski and adjustable at their other ends to an angle lever, which angle lever can be pivoted together by a pressure screw.
  • the embodiment shown in FIGS. 5 and 6 differs from the one dealt with first in that the area of the ski intended for receiving the binding is free of steel strips and in that two separate pressure screws are provided for pivoting the two angle levers, which are in front of and are behind the binding.
  • the ski described in DE-A-34 18 604 is provided with a horizontal slot below the instep area of the ski boot, which divides the ski into an upper and a lower part.
  • the lower part can be bent more easily in the vertical direction than the upper one and is provided with pressure elements that run through the upper part and can be moved downwards from the front part of the sole of the ski boot.
  • the area of the ski tread that is coated with adhesive wax is pressed against the snow surface. This adjustment takes place in the rhythm of the step movement.
  • the known ski is therefore similar in function to the ski according to claim 2, but different in its structure, since no component, especially no bending beam, is used in the sense of the invention.
  • the object of the invention is to eliminate the disadvantages of the known designs and to create a ski in which carrying and replacing pressure bars becomes superfluous.
  • the bending beam is loosely arranged inside the ski, since it is supported at its two ends only on bearing surfaces in the ski body.
  • Such an arrangement cannot be found in FR-A-1 467 141, which now forms the state of the art, because there the rods completely fill the individual bores, which fact does not constitute a loose arrangement even when the individual rods are inserted smoothly into the bores become soi len.
  • the invention is intended to enable a continuous and successive change in the flexural rigidity of the ski. In addition, this measure is achieved without handling rods or the like and also without the user having to carry them for cross-country skiing.
  • the setting to the desired bending stiffness is carried out by a pressure element, whereby the ski can be adapted to the weight of the user and to the existing snow conditions in a simple manner.
  • the change in the flexural rigidity of the ski takes place via a pressure transmission element, as a result of which this change takes place in the rhythm of the step movement of the cross-country skier, thereby making cross-country skiing easier.
  • FIG. 1 is a section along the line II in Fig. 2 and Fig. 2 is a section along the line 11-11 in Fig. 1.
  • Figs. 3-5 are other embodiments, which a periodic change in the bending stiffness of the ski enable shown purely schematically in a section corresponding to FIG. 1. 6 and 7, an embodiment modified in comparison to the previous embodiments is shown in longitudinal section and in section along the line VII-VII in FIG. 6.
  • FIG. 8 is a vertical longitudinal central section through a further embodiment and FIG. 9 is an associated top view. 10 shows a top view of another embodiment. 11 is a vertical longitudinal central section through an additional embodiment and FIG.
  • FIG. 12 is a section along the line XII-XII in FIG. 11.
  • FIG. 13 shows a plan view of a variant of the ski according to FIGS. 11-13.
  • FIG. 15 shows a cross section through a last embodiment and
  • FIG. 16 shows a plan view of a slide which is provided in this exemplary embodiment and is designed in the manner of a rotary slide valve.
  • the ski is designated 1 in its entirety. It consists of a core, of which two sections 2a and 2b are visible in FIG. 2, an upper chord 3 and a lower chord 4. In its central area, that is to say in the so-called “wax area”, the core is through a slot 5, which runs symmetrically to the vertical longitudinal plane of the ski, separated into the two sections 2a and 2b (see FIG. 2). In this slot 5, which takes up about a third of the ski width, a bending beam 6 is arranged. This has an essentially I-shaped cross section, extends approximately over the middle third, the wax area of the ski, and is stiffened in the area of its two ends and in its middle area. The bending beam 6 rests with its two ends on bearing surfaces 7 and 8 of the ski. These support surfaces are formed on resistant stiffening blocks which are glued to the two belts 3 and 4 and in this way form a unit with the belts.
  • a plate 9 is fastened to the upper flange 3 in the middle of the top of the ski, for example by means of screws 10.
  • This plate 9 has in its axis a threaded bore into which a grub screw 11 is screwed. By adjusting the grub screw 11, the user of the ski can influence its flexural rigidity.
  • the screw 11 is screwed upward. As a result, the bending beam 6 is unaffected by the ski deflection, since it can move freely in the slot 5 towards the upper flange 3, ie the ski 1 will not If, on the other hand, the user of the ski 1 wants to use a "stiff" S ki , the screw 11 is tightened so that the bending beam 6 rests under prestress on the two bearing surfaces 7 and 8.
  • the bending beam 6 forms practically with the ski 1 a unit which is much more difficult to bend than is the case in the first treated condition.Of course, various intermediate positions of the grub screw 11 are also possible, which allow the ski to be adapted precisely to the existing snow conditions - from wet snow to dry snow.
  • a bolt 22 is fastened to the bending beam 6 in a cross-country ski and can be displaced in the vertical direction in a bore 3a in the upper flange 3.
  • two guide rails 21 are fastened to the upper flange 3, between which a slide 20 is guided.
  • the slider 20 has an inclined surface 20a and carries at its end facing the ski boot an axis 23 on which two tie rods 24 are articulated.
  • a bearing block 25 for a sole plate 26 and two further guide rails 27 are fastened to the upper flange 3 at a distance from the slide 20, in which the ends of an articulated axis 28 connecting the two tie rods 24 are guided.
  • the sole plate 26 is connected to the joint axis 28 via two joint plates 29.
  • the sole plate 26 does not take up the entire sole of the cross-country ski boot, but only the area lying between the ball of the foot and the heel.
  • FIG. 4 A modified embodiment of a cross-country ski, the bending stiffness of which can be changed periodically, is shown in FIG. 4.
  • a slide 30 which, however, in contrast to the slide described first, has two control surfaces 31 and 32, the first 31 for controlling the pin 22 of the bending beam and the second 32 for displacing the slide 30 in Towards the ski tip.
  • the slider 30 is again guided in two lateral guide rails 33 and is under the influence of a compression spring 34 which tries to move it towards the end of the ski and is supported on a ski bracket 34a.
  • a further bearing block 35 At a distance from the slide 30 there is a further bearing block 35, on which a sole plate 36 designed as a two-armed lever is pivotably mounted on an axis 35a.
  • This sole plate 36 carries at its end facing the slider 30 a roller 37 which can roll on the control surface 32.
  • the sole plate 36 is pivoted back clockwise into the starting position shown in FIG. 4.
  • the slider 30 is shifted to the right by the spring 34, and the bolt 22 is pushed in again.
  • the ski is stiffened by the clamped bending beam for the following step phase (gliding) with weight load in the heel area.
  • a slide 40 is provided, which is guided in guide rails 41 parallel to the upper flange 3, carries a control curve 40a at its front end and is under the influence of a compression spring 42.
  • the bearing block 42a is - seen in plan view - U-shaped and carries in the middle region of its legs a transverse axis 43 on which a sole plate 44 is pivotably mounted.
  • the sole plate 44 has two downwardly projecting lugs 45 which carry a bolt 46 which penetrates a longitudinally extending, preferably arcuately shaped elongated hole 47 in the slide 40 in the longitudinal direction of the ski.
  • FIG. 5 shows that position of the cross-country ski in which the bending beam is in the active position (sliding phase). If the skier transfers his weight from the heel area to the toe area of the ski boot (push-off phase), the sole plate 44 is pivoted counter-clockwise about the transverse axis 43. As a result, the lugs 45 are also pivoted, and the bolt 46 is moved toward the end of the ski against the force of the compression spring 42. However, this also results in a displacement of the slider 40 towards the end of the ski. In the process, the pin 22 slides upward along the control curve 40a and the bending beam is released, so that bending of the ski in the “wax area” is facilitated in this phase.
  • the sole plate 44 is pivoted back clockwise into the starting position shown in FIG. 5.
  • the slider 40 is shifted to the left by the spring 42 and the bolt 22 is pushed in again.
  • the ski is stiffened by the bending beam in the active position for the following step phase (sliding), with a weight load in the heel area.
  • FIGS. 6 and 7. A somewhat modified embodiment is shown in FIGS. 6 and 7.
  • a bolt 22 ′ is fastened to the bending beam 6 and is guided in a bore 3a of the upper chord 3 so that it can be moved up and down.
  • This pin 22 ' is held in the operative position of the bending beam 6 shown in FIG. 6 by two sliders 50 which can be adjusted parallel to the top of the ski against the force of compression springs 51.
  • the two sliders 50 and the springs 51 are arranged in a housing 54, which is supported on the underside of the upper chord 3.
  • a bearing block 56 is arranged on the upper flange 3, in which a pedal 52 is pivotably mounted on an axis running transversely to the longitudinal direction of the ski.
  • the pedal 52 extends beyond the area of the bolt 22 ′ and carries a pressure piece 53 in this area, which is surrounded by a pressure spring 57.
  • the lower end of the compression spring 57 is supported on the upper chord 3.
  • the downward-facing end of the pressure piece 53 is - seen in a side view (see FIG. 6) - bevelled and is in contact with the slides 50 with its two inclined surfaces.
  • the bolt 22 ' carries at its upper end a rib 22'a which is rectangular in cross section and which is also rectangular in cross section GE groove 53a in the pressure piece 53 is assigned to receive the rib 22'a.
  • the rib 22'a and the groove 53a run in the direction of movement of the two sliders 50.
  • the pedal 52 In the operative position of the bending beam 6 (sliding phase), the pedal 52 assumes the position shown in FIG. 6. If the pedal 52 is pressed downward from the front region of the ski boot against the force of the compression spring 57, the two sliders 50 are displaced outwards against the influence of the compression springs 51, so that the bolt 22 'moves upwards in the bore 3a can. The rib 22'a of the bolt 22 'enters the groove 53a in the pressure piece 53 which moves in the opposite direction to the bolt 22'. This makes it easier for the ski to bend in the wax area during the gliding phase.
  • 3 denotes the upper flange and 6 the bending beam of the cross-country ski, in the further ski 1, with adjustable rigidity.
  • the bending beam 6 carries a pin 22 which, in conjunction with a slide 60 to be described in more detail, serves to change the pretension of the bending beam 6.
  • a conventional cross-country binding is attached to the upper flange 3. There is a free space 5a between the upper flange 3 and the bending beam 6, which serves to receive the slide 60.
  • This slider 60 has an area 60a which carries an inclined surface and extends in the longitudinal direction of the ski in the space 5a, a transverse part 60b which is arranged perpendicularly to this and which passes through a slot 3a in the upper chord 3, an area 60c which is mounted on the upper side of the upper chord 3 and which has a Handle 60d is provided, as well as a cover area 60e, which extends from the transverse part 60b to the side opposite the area 60c.
  • the area 60c is guided in the longitudinal direction of the ski by means of two guide rails 61 which are fastened on the upper side of the upper flange 3.
  • the rigidity or the curvature of the ski 1 can be changed in cooperation with the pin 22.
  • FIG. 8 there is a free space between the pin 22 and the inclined surface of the slider 60 in the unloaded state of the ski 1. This space is reduced with increasing stress from the skier until the inclined surface of the slider 60 abuts the pin 22. Up to this point, the ski 1 has been relatively soft.
  • the bending beam 6 acts as a load-bearing element, which leads to a stiffening of the ski.
  • the bending beam 6 is additionally pretensioned in relation to the ski 1, which causes an increase in the curvature.
  • the slot 3a in the upper chord 3 is covered by the covering area 60e of the slider 60 against the penetration of snow into the free space 5a.
  • the slide 70 is very similar to the first. It differs from this only in that the area 70c of the slide 70 is provided with a toothed rack 70f which meshes with a pinion 72 which is fastened on a shaft 73.
  • This shaft 73 is arranged perpendicular to the top of the ski and rotatably mounted in the ski body 1.
  • the upper end of the shaft 73 carries a rotary knob 74 which is knurled on its circumference and is used to attack the fingers of the user. In this way, a sensitive adjustment of the slide 70 is possible.
  • FIGS. 11-13 differs from the two previous ones in that the handle 80d is fastened by means of a bolt on the area 80a of the slide 80 which supports the inclined surface.
  • This bolt passes through a slot 3a in the upper belt 3 of the ski 1.
  • the slider 80 is guided on guide strips 82 which are embedded in those sections of the ski core which are located on both sides of the bending beam 6.
  • FIG. 14 A variant of the last embodiment is shown in FIG. 14.
  • the handle 90d is designed as a crossbeam, which is connected to the region of the slider, which does not show the sloping surface, by means of two vertical bolts on the upper side of the ski which penetrate longitudinal slots 3a in the upper flange 3 of the ski.
  • FIGS. 15 and 16 A last embodiment is shown in FIGS. 15 and 16.
  • a rotary slide valve 100 is used instead of a longitudinal slide valve, as is present in the previous exemplary embodiments. which is delimited on its underside by a spiral surface 100g.
  • This rotary valve 100 is seated on a shaft 101, which is the upper chord 3 penetrates and carries at its upper end a knurled disc 102, which is provided with a scale and which serves to attack the fingers of the user.
  • a stop 100i is arranged on the rotary slide valve 100 in the area of the radial wall 100h which delimits the beginning and the end of the helical surface 100 and runs in the direction of the shaft 101 and which is intended to bear against the pin 22 of the bending beam 6.
  • the slider or the adjusting disk can be held in the selected position by a locking element which is loaded by a compression spring and is not shown in the drawing.

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  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)

Description

Die Erfindung bezieht sich auf einen Ski, insbesondere einen Langlaufski, nach dem ersten Teil des Anspruches 1.The invention relates to a ski, in particular a cross-country ski, according to the first part of claim 1.

Ein Ski der eingangs genannten Art ist in der FR-A-1 467141 (vgl. Fig. 2) beschrieben. Dieser Ski weist drei sich in Skilkängsrichtung erstreckende Bohrungen auf. Um die Biegesteifigkeit des Ski zu verändern, kann in eine oder in mehrere dieser Bohrungen ein bzw. je ein Stab aus Stahl, einer Leichtmetallegierung oder Kunstharz eingesetzt werden. Der Stab wird mittels einer Madenschraube, welche in das Ende der Bohrung eingeschraubt wird, in der Bohrung festgehalten.A ski of the type mentioned at the outset is described in FR-A-1 467141 (see FIG. 2). This ski has three bores extending in the longitudinal direction of the ski. In order to change the flexural rigidity of the ski, one or more rods made of steel, a light metal alloy or synthetic resin can be inserted into one or more of these holes. The rod is held in the hole by means of a grub screw which is screwed into the end of the hole.

Allerdings hat diese Ausführungsform den Nachteil, daß die Biegesteifigkeit des Ski durch Einführen bzw. Herausnehmen der Stäbe somit nur stufenweise und nicht kontinuierlich verändert werden kann. Des weiteren müssen die nicht verwendeten Stäbe vom Benützer dauernd mitgeführt werden.However, this embodiment has the disadvantage that the flexural rigidity of the ski can only be changed gradually and not continuously by inserting or removing the rods. Furthermore, the rods that are not used must always be carried by the user.

Nach der FR-A-1 109 560 werden zur Veränderung der Biegesteifigkeit des Ski zwei Stahlbänder verwendet, welche teilweise an der Skioberseite und teilweise in einem Schlitz im mittleren Bereich unterhalb der Bindung verlaufen (s. die Fig. 1 und 2). Diese Stahlbänder sind mit ihren einen Enden an den Enden des Ski verankert und mit ihren anderen Enden an je einem Winkelhebel einstellbar befestigt, welche Winkelhebel durch eine Druckschraube gemeinsam verschwenkt werden können. Die in den Fig. 5 und 6 gezeigte Ausführungsform unterscheidet sich von der zuerst behandelten dadurch, daß der zur Aufnahme der Bindung bestimmte Bereich des Ski von Stahlbändern frei ist, und daß zum Verschwenken der beiden Winkelhebel zwei gesonderte Druckschrauben vorgesehen sind, die sich vor und hinter der Bindung befinden.According to FR-A-1 109 560, two steel strips are used to change the flexural rigidity of the ski, some of which run on the top of the ski and partly in a slot in the middle area below the binding (see FIGS. 1 and 2). These steel straps are anchored at one end to the ends of the ski and adjustable at their other ends to an angle lever, which angle lever can be pivoted together by a pressure screw. The embodiment shown in FIGS. 5 and 6 differs from the one dealt with first in that the area of the ski intended for receiving the binding is free of steel strips and in that two separate pressure screws are provided for pivoting the two angle levers, which are in front of and are behind the binding.

Wenn auch die Anordnung von Stahlbändern im Skikörper bezüglich der Höhe geringer ist als die Verwendung eines Biegebalkens, so ist doch der für die Unterbringung der Einstellvorrichtung erforderliche Raumbedarf im mittleren Bereich des Ski erheblich, wie dies den Fig. 2 und 5 entnommen werden kann. Außerdem müssen die Enden der einzelnen Stahlbänder mit Gliedern des Stellmechanismus nach Fig. 3 oder 4 gesondert befestigt werden, so daß die Gefahr einer Funktionsuntüchigkeit des Verstellmechanismus an mehreren Stellen gegeben ist. Des weiteren ist noch zu bemerken, daß die Anordnung der beiden Winkelhebel an Querachsen im Körper des Ski zusätzliche technische Probleme bedeuten kann, da diese Querachsen jeweils verjüngte Bereiche des Skikörpers durchsetzen, da für das Verschwenken der einzelnen Winkelhebel entsprechende Freistellungen erforderlich sind.Even if the arrangement of steel bands in the ski body is lower in height than the use of a bending beam, the space required in the central region of the ski for accommodating the adjusting device is considerable, as can be seen in FIGS. 2 and 5. In addition, the ends of the individual steel strips must be fastened separately with links of the adjusting mechanism according to FIG. 3 or 4, so that there is a risk of the adjusting mechanism becoming inoperable at several points. Furthermore, it should also be noted that the arrangement of the two angle levers on transverse axes in the body of the ski can mean additional technical problems, since these transverse axes each enforce tapered regions of the ski body, since corresponding releases are required for pivoting the individual angle levers.

Der in der DE-A-34 18 604 beschriebene Ski ist unterhalb des Spannbereiches des Skischuhs mit einem horizontalen Schlitz versehen, der den Ski in einen oberen und einen unteren Teil unterteilt. Der untere Teil kann in vertikaler Richtung leichter verbogen werden als der obere und ist mit Druckelementen versehen, welche durch den oberen Teil verlaufen und vom vorderen Teil der Sohle des Skischuhs nach unten verschoben werden können. Dadurch wird bei einer Gewichtsverlagerung des Skiläufers auf die Spitze der Skischuhsohle der mit einem Haftwachs bestrichene Bereich des Laufbelages des Ski gegen die Schneeoberfläche gepreßt. Dieses Anpassen erfolgt im Rhythmus der Schrittbewegung. Der bekannte Ski ist daher in seiner Funktion dem Ski nach Anspruch 2 zwar ähnlich, in seinem Aufbau jedoch unterschiedlich, da kein Bauelement, vor allem kein Biegebalken, im Sinne der Erfindung Verwendung findet.The ski described in DE-A-34 18 604 is provided with a horizontal slot below the instep area of the ski boot, which divides the ski into an upper and a lower part. The lower part can be bent more easily in the vertical direction than the upper one and is provided with pressure elements that run through the upper part and can be moved downwards from the front part of the sole of the ski boot. As a result, when the skier shifts weight to the tip of the ski boot sole, the area of the ski tread that is coated with adhesive wax is pressed against the snow surface. This adjustment takes place in the rhythm of the step movement. The known ski is therefore similar in function to the ski according to claim 2, but different in its structure, since no component, especially no bending beam, is used in the sense of the invention.

Ein anderer ähnlicher Ski ist in der US-A-4 300 786 beschrieben. Dieser Ski hat an den beiden Schmalseitenflächen im Querschnitt quadratische Nuten, in welche Stäbe eingelegt werden, die als Druckbalken im weiteren Sinne bezeichnet werden können. Je nach der gewünschten Steifigkeit des Ski kann der Skiläufer die richtigen Stäbe aus einer Serie von Stäben auswählen. Jeder Stab setzt seiner Durchbiegung zwei verschiedene Widerstände entgegen, je nachdem, ob er in seiner Ausgangslage oder in einer um 90° verdrehten Lage in die Nut eingesetzt wird. Zur Befestigung der Stäbe, die normalerweise durch Reibung festgehalten werden, können auch Schrauben oder Bolzen herangezogen werden.Another similar ski is described in US-A-4,300,786. This ski has square grooves in cross section on the two narrow side surfaces, into which rods are inserted, which can be referred to as pressure bars in the broader sense. Depending on the desired stiffness of the ski, the skier can choose the right sticks from a series of sticks. Each rod opposes its deflection with two different resistances, depending on whether it is inserted into the groove in its starting position or in a position rotated by 90 °. Screws or bolts can also be used to fasten the rods, which are normally held in place by friction.

Die Handhabung des bekannten Ski ist äußerst kompliziert, da der Skiläufer stets ein ganzes Bündel von Stäben mit sich führen muß. Außerdem ist es für den Skiläufer schwer, diejenigen Stäbe auszuwählen, welche für die vorhandenen Schneeverhältnisse die geeignetsten sind. Aber selbst dann, wenn noch ein Paar von solchen Stäben am Ski mitgeführt wird, ist die zur Änderung der Biegesteifigkeit erforderliche Handhabung im Gelände (Verdrehen der Lage der Stäbe um 90°) umständlich und in der Kälte (unter - 10 °C) dem Benützer kaum zumutbar.The handling of the known ski is extremely complicated, since the skier must always carry a whole bundle of bars with him. In addition, it is difficult for the skier to select the poles that are most suitable for the existing snow conditions. But even if a pair of such rods is still carried on the ski, the handling required to change the bending stiffness in the field (turning the position of the rods by 90 °) is cumbersome and in the cold (below - 10 ° C) the user hardly reasonable.

Die Erfindung stellt sich die Aufgabe, die Nachteile der bekannten Ausführungen zu beseitigen und einen Ski zu schaffen, bei dem ein Mitführen und Auswechseln von Druckbalken überflüssig wird.The object of the invention is to eliminate the disadvantages of the known designs and to create a ski in which carrying and replacing pressure bars becomes superfluous.

Dieses Ziel wird erfindungsgemäß durch die kennzeichnenden Merkmale des Anspruches 1 oder 2 erreicht.This aim is achieved according to the invention by the characterizing features of claim 1 or 2.

In beiden Fällen ist der Biegebalken im Inneren des Ski lose angeordnet, da er an seinen beiden Enden nur auf Auflagerflächen im Skikörper abgestützt ist. Eine solche Anordnung kann der den nunmehrigen Stand der Technik bildenden FR-A-1 467 141 nicht entnommen werden, weil dort die Stäbe die einzelnen Bohrungen voll ausfüllen, welcher Umstand selbst dann keine lose Anordnung darstellt, wenn die einzelnen Stäbe in den Bohrungen leichtgängig eingeführt werden soilen. Im Gegensatz dazu soll durch die Erfindung eine kontinuierliche und successive Veränderung der Biegesteifigkeit des Ski ermöglicht werden. Darüber hinaus wird diese Maßnahme ohne Handhabung mit Stäben od. dgl. erreicht und auch ohne daß diese vom Benützer für den Langlauf mitgeführt werden müßten.In both cases, the bending beam is loosely arranged inside the ski, since it is supported at its two ends only on bearing surfaces in the ski body. Such an arrangement cannot be found in FR-A-1 467 141, which now forms the state of the art, because there the rods completely fill the individual bores, which fact does not constitute a loose arrangement even when the individual rods are inserted smoothly into the bores become soi len. In contrast, the invention is intended to enable a continuous and successive change in the flexural rigidity of the ski. In addition, this measure is achieved without handling rods or the like and also without the user having to carry them for cross-country skiing.

Das Einstellen auf die gewünschte Biegesteifigkeit erfolgt nach den Merkmalen des Anspruches 1 durch ein Druckelement, wodurch eine Anpassung des Ski an das Gewicht des Benützers sowie an die vorhandenen Schneeverhältnisse in einfacher Weise erfolgen kann. Bei einer Ausführung nach den Merkmalen des Anspruches 2 erfolgt die Änderung der Biegesteifigkeit des Ski über ein Druckübertragungsglied, wodurch diese Veränderung im Rhythmus der Schrittbewegung des Langläufers erfolgt und dadurch der Langlauf wensentlich erleichtert wird.According to the features of claim 1, the setting to the desired bending stiffness is carried out by a pressure element, whereby the ski can be adapted to the weight of the user and to the existing snow conditions in a simple manner. In an embodiment according to the features of claim 2, the change in the flexural rigidity of the ski takes place via a pressure transmission element, as a result of which this change takes place in the rhythm of the step movement of the cross-country skier, thereby making cross-country skiing easier.

In den Patentansprüchen 3 bis 27 werden vorteilhaft weitere Ausgestaltungen der Erfindung unter Schutz gestellt.In the claims 3 to 27, further refinements of the invention are advantageously protected.

In der Zeichnung sind beispielsweise Ausführungsformen des Erfindungsgegenstandes wiedergegeben. Fig. 1 ist ein Schnitt nach der Linie I-I in Fig. 2 und Fig. 2 ein Schnitt nach der Linie 11-11 in Fig. 1. In den Fig. 3-5 sind weitere Ausführungsformen, welche eine periodische Veränderung der Biegesteifigkeit des Ski ermöglichen, in einem der Fig. 1 entsprechenden Schnitt rein schematisch dargestellt. In den Fig. 6 und 7 ist ein gegenüber den vorhergehenden Ausführungsformen abgewandelten Ausführungsbeispiel im Längsschnitt und im Schnitt nach der Linie VII-VII in Fig. 6 wiedergegeben. Fig. 8 ist ein vertikaler Längsmittelschnitt durch eine weitere Ausführungsform und Fig. 9 eine dazugehörige Draufsicht. In Fig. 10 ist eine Draufsicht auf eine andere Ausführungsform wiedergegeben. Fig. 11 ist ein vertikaler Längsmittelschnitt durch eine zusätzliche Ausführungsform und Fig. 12 ein Schnitt nach der Linie XII-XII in Fig. 11. Fig. 13 zeigt eine Draufsicht auf eine Variante des Ski nach den Fig. 11-13. Schließlich zeigt Fig. 15 einen Querschnitt durch ein letztes Ausführungs und Fig. 16 eine Draufsicht auf einen bei diesem Ausführungsbeispiel vorhandenen, nach Art eines Drehschiebers ausgebildeten Schiebers.In the drawing, for example, embodiments of the subject matter of the invention are shown. Fig. 1 is a section along the line II in Fig. 2 and Fig. 2 is a section along the line 11-11 in Fig. 1. In Figs. 3-5 are other embodiments, which a periodic change in the bending stiffness of the ski enable shown purely schematically in a section corresponding to FIG. 1. 6 and 7, an embodiment modified in comparison to the previous embodiments is shown in longitudinal section and in section along the line VII-VII in FIG. 6. FIG. 8 is a vertical longitudinal central section through a further embodiment and FIG. 9 is an associated top view. 10 shows a top view of another embodiment. 11 is a vertical longitudinal central section through an additional embodiment and FIG. 12 is a section along the line XII-XII in FIG. 11. FIG. 13 shows a plan view of a variant of the ski according to FIGS. 11-13. Finally, FIG. 15 shows a cross section through a last embodiment and FIG. 16 shows a plan view of a slide which is provided in this exemplary embodiment and is designed in the manner of a rotary slide valve.

In den Fig. 1 und 2 ist der Ski in seiner Gesamtheit mit 1 bezeichnet. Er besteht aus einem Kern, von dem in Fig. 2 zwei Abschnitte 2a und 2b sichtbar sind, aus einem Obergurt 3 und aus einem Untergurt 4. In seinem mittleren Bereich, also im sogenannten « Wachsbereich •, ist der Kern durch einen Schlitz 5, der symmetrisch zur vertikalen Skilängsmittelebene verläuft, in die beiden Abschnitte 2a und 2b getrennt (s. Fig. 2). In diesem Schlitz 5, der etwa ein Drittel der Skibreite einnimmt, ist ein Biegebalken 6 angeordnet. Dieser hat einen im wesentlichen I-förmigen Querschnitt, erstreckt sich etwa über das mittlere Drittel, den « Wachsbereich des Skis und ist im Bereich seiner beiden Enden und in seinem mittleren Bereich versteift. Der Biegebalken 6 liegt mit seinen beiden Enden auf Auflagerflächen 7 und 8 des Skis auf. Diese Auflagerflächen sind an widerstandsfähigen Versteifungsblöcken ausgebildet, welche mit den beiden Gurten 3 und 4 verklebt sind und auf diese Weise mit den Gurten eine Einheit bilden.1 and 2, the ski is designated 1 in its entirety. It consists of a core, of which two sections 2a and 2b are visible in FIG. 2, an upper chord 3 and a lower chord 4. In its central area, that is to say in the so-called “wax area”, the core is through a slot 5, which runs symmetrically to the vertical longitudinal plane of the ski, separated into the two sections 2a and 2b (see FIG. 2). In this slot 5, which takes up about a third of the ski width, a bending beam 6 is arranged. This has an essentially I-shaped cross section, extends approximately over the middle third, the wax area of the ski, and is stiffened in the area of its two ends and in its middle area. The bending beam 6 rests with its two ends on bearing surfaces 7 and 8 of the ski. These support surfaces are formed on resistant stiffening blocks which are glued to the two belts 3 and 4 and in this way form a unit with the belts.

Am Obergurt 3 ist in der Mitte der Oberseite des Skis eine Platte 9 beispielsweise mittels Schrauben 10 befestigt. Diese Platte 9 besitzt in ihrer Achse eine Gewindebohrung, in die eine Madenschraube 11 eingeschraubt ist. Durch Verstellen der Madenschraube 11 kann der Benützer des Skis dessen Biegesteifigkeit beeinflussen.A plate 9 is fastened to the upper flange 3 in the middle of the top of the ski, for example by means of screws 10. This plate 9 has in its axis a threaded bore into which a grub screw 11 is screwed. By adjusting the grub screw 11, the user of the ski can influence its flexural rigidity.

Wird vom Benützer ein ce weicher" Ski 1 gewünscht, so wird die Schraube 11 nach oben geschraubt. Dadurch bleibt der Biegebalken 6 von der Skidurchbiegung unbeeinflußt, da er sich im Schlitz 5 zum Obergurt 3 hin frei bewegen kann, d. h. der Ski 1 wird nicht versteift. Will hingegen der Benützer des Skis 1 einen « steifen » Ski verwenden, so wird die Schraube 11 festgespannt, so daß der Biegebalken 6 unter Vorspannung auf den beiden Auflagerflächen 7 und 8 aufliegt. Der Biegebalken 6 bildet dabei mit dem Ski 1 praktisch eine Einheit, die sich wesentlich schwerer durchbiegen läßt, als im zuerst behandelten Zustand dies der Fall ist. Selbstverständlich sind auch verschiedene Zwischenstellungen der Madenschraube 11 möglich, welche eine genaue Anpassung des Skis an die vorhandenen Schneeverhältnisse - vom Naßschnee bis zum Trockenschnee - ermöglichen.If the user desires a softer "ski 1", the screw 11 is screwed upward. As a result, the bending beam 6 is unaffected by the ski deflection, since it can move freely in the slot 5 towards the upper flange 3, ie the ski 1 will not If, on the other hand, the user of the ski 1 wants to use a "stiff" S ki , the screw 11 is tightened so that the bending beam 6 rests under prestress on the two bearing surfaces 7 and 8. The bending beam 6 forms practically with the ski 1 a unit which is much more difficult to bend than is the case in the first treated condition.Of course, various intermediate positions of the grub screw 11 are also possible, which allow the ski to be adapted precisely to the existing snow conditions - from wet snow to dry snow.

Bei der Ausführungsform gemäß Fig. 3 ist in einem Langlaufski am Biegebalken 6 ein Bolzen 22 befestigt, der in einer Bohrung 3a im Obergurt 3 in vertikaler Richtung verschiebbar ist. Im Bereich oberhalb des Bolzens 22 sind am Obergurt 3 zwei Führungsschienen 21 befestigt, zwischen denen ein Schieber 20 geführt ist. Der Schieber 20 besitzt eine Schrägfläche 20a und trägt an seinem dem Skischuh zugewandten Ende eine Achse 23, an der zwei Zugstangen 24 angelenkt sind. Weiters sind an dem Obergurt 3 im Abstand von Schieber 20 ein Lagerbock 25 für eine Sohlenplatte 26 und zwei weitere Führungsschienen 27 befestigt, in denen die Enden einer die beiden Zugstangen 24 verbindenden Gelenkachse 28 geführt sind. In ihrem mittleren Bereich ist die Sohlenplatte 26 über zwei Gelenklaschen 29 mit der Gelenkachse 28 verbunden. Die Sohlenplatte 26 nimmt nicht die gesamte Sohle des Langlaufskischuhes, sondern nur den zwischen dem Ballen und der Ferse liegenden Bereich auf.In the embodiment according to FIG. 3, a bolt 22 is fastened to the bending beam 6 in a cross-country ski and can be displaced in the vertical direction in a bore 3a in the upper flange 3. In the area above the bolt 22, two guide rails 21 are fastened to the upper flange 3, between which a slide 20 is guided. The slider 20 has an inclined surface 20a and carries at its end facing the ski boot an axis 23 on which two tie rods 24 are articulated. Furthermore, a bearing block 25 for a sole plate 26 and two further guide rails 27 are fastened to the upper flange 3 at a distance from the slide 20, in which the ends of an articulated axis 28 connecting the two tie rods 24 are guided. In its central region, the sole plate 26 is connected to the joint axis 28 via two joint plates 29. The sole plate 26 does not take up the entire sole of the cross-country ski boot, but only the area lying between the ball of the foot and the heel.

Wird bei dieser Ausführungsform die Sohlenplatte 26 von der Ferse des Benützers niedergetreten (Gleitphase), so wird über die Gelenklaschen 29 und die beiden Zugstangen 24 der Schieber 20 in Fig. 3 nach rechts bewegt. Dadurch wird von der Schrägfläche 20a des Schiebers 20 der Bolzen 22 in der Bohrung 2a nach unten gedrückt und dadurch über den auf diese Weise vorgespannten Biegebalken 6 eine Versteifung des Skis herbeigeführt. Diese Versteifung wird daher nur solange aufrecht erhalten, als der Skischuh mit der ganzen Sohle auf dem Obergurt 3 aufliegt. Wird hingegen der Fuß des Skiläufers abgewinkelt (Abstoßphase), und die Sohlenplatte 26 entgegen dem Uhrzeigersinn verschwenkt, so wird der Schieber 20 nach links in Fig. 3 verschoben und die Vorspannung des Biegebalkens 6 wird aufgehoben. Der Ski ist in dieser Periode der Abstoßphase daher «weich •.In this embodiment, if the sole plate 26 is depressed by the heel of the user (sliding phase), the slide 20 is moved to the right in FIG. 3 via the joint plates 29 and the two tie rods 24. As a result, the bolt 22 in the bore 2a is pressed downward by the inclined surface 20a of the slider 20 and thereby stiffens the ski via the bending beam 6 which is prestressed in this way. This stiffening is therefore only maintained as long as the ski boot rests on the upper flange 3 with the entire sole. However, if the skier's foot is angled (repulsion phase se), and the sole plate 26 is pivoted counterclockwise, the slide 20 is moved to the left in Fig. 3 and the bias of the bending beam 6 is released. The ski is therefore “soft” in this period of the push-off phase.

Eine abgeänderte Ausführungsform eines Langlaufskis, dessen Biegesteifigkeit periodisch verändert werden kann, ist in Fig. 4 wiedergegeben. Bei dieser Ausführungsform ist gleichfalls ein Schieber 30 vorhanden, der jedoch im Gegensatz zum zuerst be - schriebenen Schieber über zwei Steuerflächen 31 und 32 verfügt, von denen die erste 31 zur Steuerung des Bolzens 22 des Biegebalkens und die zweite 32 zur Verschiebung des Schiebers 30 in Richtung zur Skispitze hin dient. Der Schieber 30 ist wieder in zwei seitlichen Führungsschienen 33 geführt und steht unter dem Einfluß einer Druckfeder 34, welche ihn in Richtung zum Skiende hin zu verschieben trachtet und sich an einem skifesten Lagerbock 34a abstützt. Im Abstand vom Schieber 30 befindet sich ein weiterer Lagerbock 35, auf dem eine als zweiarmiger Hebel ausgebildete Sohlenplatte 36 auf einer Achse 35a verschwenkbar gelagert ist. Diese Sohlenplatte 36 trägt an ihrem dem Schieber 30 zugewandten Ende eine Rolle 37, welche auf der Steuerfläche 32 abrollen kann.A modified embodiment of a cross-country ski, the bending stiffness of which can be changed periodically, is shown in FIG. 4. In this embodiment there is also a slide 30 which, however, in contrast to the slide described first, has two control surfaces 31 and 32, the first 31 for controlling the pin 22 of the bending beam and the second 32 for displacing the slide 30 in Towards the ski tip. The slider 30 is again guided in two lateral guide rails 33 and is under the influence of a compression spring 34 which tries to move it towards the end of the ski and is supported on a ski bracket 34a. At a distance from the slide 30 there is a further bearing block 35, on which a sole plate 36 designed as a two-armed lever is pivotably mounted on an axis 35a. This sole plate 36 carries at its end facing the slider 30 a roller 37 which can roll on the control surface 32.

In der in Fig. 4 dargestellten Lage befindet sich die Sohle des Skischuhs parallel zum Obergurt 3 (Gleitphase). Der nicht dargestellte Biegebalken verstärkt daher die Steifigkeit des Skis. Wird jedoch der Zehenbereich des Skischuhs nach unten gedrückt (Abstoßphase) und die Sohlenplatte 36 um die Achse 35a entgegen dem Uhrzeigersinn verschwenkt, so wird der Schieber 30 gegen den Druck der Druckfeder 34 zur Skispitze hin verschoben, indem die Rolle 37 auf der Steuerfläche 32 gegen den Obergurt 3 hin rollt. Durch diese Verschiebung des Schiebers 30 gleitet aber der Bolzen 22 an der Steuerfläche 31 nach oben, wodurch die zur Skisteifigkeit beitragende Wirkung des Biegebalkens aufgehoben wird. Dadurch wird in der Abstoßphase eine Durchbiegung des Langlaufskis im « Wachsbereich erleichtert.In the position shown in FIG. 4, the sole of the ski boot is parallel to the upper flange 3 (sliding phase). The bending beam, not shown, therefore increases the rigidity of the ski. However, if the toe area of the ski boot is pressed down (push-off phase) and the sole plate 36 is pivoted counterclockwise about the axis 35a, the slider 30 is displaced towards the tip of the ski against the pressure of the compression spring 34 by the roller 37 on the control surface 32 against rolls the top chord 3. Through this displacement of the slider 30, however, the bolt 22 slides upward on the control surface 31, as a result of which the effect of the bending beam which contributes to ski rigidity is eliminated. This makes it easier for the cross-country ski to bend in the wax area in the push-off phase.

Wird im Verlauf des Langlaufschrittes der Ski vom Gewicht des Skiläufers entlastet bzw. vom Boden abgehoben, so wird die Sohlenplatte 36 im Uhrzeigersinn in die in Fig. 4 dargestellte Ausgangslage zurückgeschwenkt. Der Schieber 30 wird durch die Feder 34 nach rechts verschoben, und der Bolzen 22 wird wieder eingedrückt. Dadurch ist für die folgende Schrittphase (Gleiten), mit Gewichtsbelastung im Fersenbereich, der Ski durch den eingespannten Biegebalken versteift.If the weight of the skier is relieved or the ski is lifted from the ground in the course of the cross-country step, the sole plate 36 is pivoted back clockwise into the starting position shown in FIG. 4. The slider 30 is shifted to the right by the spring 34, and the bolt 22 is pushed in again. As a result, the ski is stiffened by the clamped bending beam for the following step phase (gliding) with weight load in the heel area.

Auch bei der Ausführung gemäß Fig. 5 ist ein Schieber 40 vorgesehen, der in Führungsschienen 41 parallel zum Obergurt 3 geführt ist, an seinem vorderen Ende eine Steuerkurve 40a trägt und unter dem Einfluß einer Druckfeder 42 steht. Diese sucht den Schieber 40 zur Skispitze hin zu verschieben und stützt sich an einem Lagerbock 42a ab, der am Obergurt 3 befestigt, z. B. angeschraubt ist. Der Lagerbock 42a ist - in Draufsicht gesehen - U-förmig und trägt im Mittelbereich seiner Schenkel eine Querachse 43, auf der eine Sohlenplatte 44 schwenkbar gelagert ist. Die Sohlenplatte 44 besitzt zwei nach unten ragende Ansätze 45, welche einen Bolzen 46 tragen, der ein in Skilängsrichtung verlaufendes, vorzugsweise bogenförmig gekrümmtes Langloch 47 im Schieber 40 durchsetzt.Also in the embodiment according to FIG. 5, a slide 40 is provided, which is guided in guide rails 41 parallel to the upper flange 3, carries a control curve 40a at its front end and is under the influence of a compression spring 42. This seeks to move the slider 40 towards the ski tip and is supported on a bearing block 42a, which is attached to the upper flange 3, e.g. B. is screwed. The bearing block 42a is - seen in plan view - U-shaped and carries in the middle region of its legs a transverse axis 43 on which a sole plate 44 is pivotably mounted. The sole plate 44 has two downwardly projecting lugs 45 which carry a bolt 46 which penetrates a longitudinally extending, preferably arcuately shaped elongated hole 47 in the slide 40 in the longitudinal direction of the ski.

In Fig. 5 ist diejenige Lage des Langlaufskis wiedergegeben, in der der Biegebalken sich in Wirkstellung befindet (Gleitphase). Wird vom Skiläufer dessen Gewicht vom Fersenbereich auf den Zehenbereich des Skischuhs verlegt (Abstoßphase), so wird die Sohlenplatte 44 um die Querachse 43 entgegen dem Uhrzeigersinn verschwenkt. Dadurch werden aber auch die Ansätze 45 verschwenkt, und der Bolzen 46 wird gegen die Kraft der Druckfeder 42 zum Skiende hin bewegt. Dies hat aber auch eine Verschiebung des Schiebers 40 in Richtung zum Skiende hin zur Folge. Dabei gleitet der Bolzen 22 entlang der Steuerkurve 40a nach oben, und der Biegebalken wird freigegeben, so daß in dieser Phase eine Durchbiegung des Skis in dem « Wachsbereich » erleichtert wird.5 shows that position of the cross-country ski in which the bending beam is in the active position (sliding phase). If the skier transfers his weight from the heel area to the toe area of the ski boot (push-off phase), the sole plate 44 is pivoted counter-clockwise about the transverse axis 43. As a result, the lugs 45 are also pivoted, and the bolt 46 is moved toward the end of the ski against the force of the compression spring 42. However, this also results in a displacement of the slider 40 towards the end of the ski. In the process, the pin 22 slides upward along the control curve 40a and the bending beam is released, so that bending of the ski in the “wax area” is facilitated in this phase.

Wird im Verlauf des Langlaufschrittes der Ski vom Gewicht des Skiläufers entlastet bzw. vom Boden abgehoben, so wird die Sohlenplatte 44 im Uhrzeigersinn in die in Fig. 5 dargestellte Ausgangslage zurückgeschwenkt. Der Schieber 40 wird durch die Feder 42 nach links verschoben, und der Bolzen 22 wird wieder eingedrückt. Dadurch ist für die folgende Schrittphase (Gleiten), mit Gewichtsbelastung im Fersenbereich, der Ski durch den in Wirkstellung befindlichen Biegebalken versteift.If the weight of the skier is relieved or the ski is lifted off the ground in the course of the cross-country step, the sole plate 44 is pivoted back clockwise into the starting position shown in FIG. 5. The slider 40 is shifted to the left by the spring 42 and the bolt 22 is pushed in again. As a result, the ski is stiffened by the bending beam in the active position for the following step phase (sliding), with a weight load in the heel area.

Eine etwas abgewandelte Ausführungsform ist in den Fig. 6 und 7 dargestellt. Bei dieser Ausführungsform ist am Biegebalken 6 ein Bolzen 22' befestigt, der in einer Bohrung 3a des Obergurtes 3 auf- und abbewegbar geführt ist. Dieser Bolzen 22' ist in der in Fig. 6 dargestellten Wirklage des Biegebalkens 6 durch zwei gegen die Kraft von Druckfedern 51 parallel zur Skioberseite verstellbare Schieber 50 festgehalten. Die beiden Schieber 50 und die Federn 51 sind in einem Gehäuse 54 angeordnet, das sich an der Unterseite des Obergurtes 3 abstützt.A somewhat modified embodiment is shown in FIGS. 6 and 7. In this embodiment, a bolt 22 ′ is fastened to the bending beam 6 and is guided in a bore 3a of the upper chord 3 so that it can be moved up and down. This pin 22 'is held in the operative position of the bending beam 6 shown in FIG. 6 by two sliders 50 which can be adjusted parallel to the top of the ski against the force of compression springs 51. The two sliders 50 and the springs 51 are arranged in a housing 54, which is supported on the underside of the upper chord 3.

Weiters ist am Obergurt 3 ein Lagerbock 56 angeordnet, in dem ein Pedal 52 auf einer quer zur Skilängsrichtung verlaufenden Achse schwenkbar gelagert ist. Das Pedal 52 erstreckt sich bis über den Bereich des Bolzens 22' und trägt in diesem Bereich ein Druckstück 53, das von einer Druckfeder 57 umgeben ist. Das untere Ende der Druckfeder 57 ist am Obergurt 3 abgestützt.Furthermore, a bearing block 56 is arranged on the upper flange 3, in which a pedal 52 is pivotably mounted on an axis running transversely to the longitudinal direction of the ski. The pedal 52 extends beyond the area of the bolt 22 ′ and carries a pressure piece 53 in this area, which is surrounded by a pressure spring 57. The lower end of the compression spring 57 is supported on the upper chord 3.

Das nach unten weisende Ende des Druckstückes 53 ist - in Seitenansicht gesehen (s. Fig. 6) - V-förmig abgeschrägt und liegt mit seinen beiden Schrägflächen an den Schiebern 50 an. Der Bolzen 22' trägt an seinem oberen Ende eine im Querschnitt rechteckige Rippe 22'a, welcher eine im Querschnitt gleichfalls rechteckige Nut 53a im Druckstück 53 zur Aufnahme der Rippe 22'a zugeordnet ist. Selbstverständlich verlaufen die Rippe 22'a und die Nut 53a in der Bewegungsrichtung der beiden Schieber 50.The downward-facing end of the pressure piece 53 is - seen in a side view (see FIG. 6) - bevelled and is in contact with the slides 50 with its two inclined surfaces. The bolt 22 'carries at its upper end a rib 22'a which is rectangular in cross section and which is also rectangular in cross section GE groove 53a in the pressure piece 53 is assigned to receive the rib 22'a. Of course, the rib 22'a and the groove 53a run in the direction of movement of the two sliders 50.

In der Wirklage des Biegebalkens 6 (Gleitphase) nimmt das Pedal 52 die in Fig. 6 dargestellte Stellung ein. Wird das Pedal 52 von dem vorderen Bereich des Skischuhs gegen die Kraft der Druckfeder 57 nach unten gedrückt, so werden die beiden Schieber 50 gegen den Einfluß der Druckfedern 51 nach außen verschoben, so daß der Bolzen 22' sich in der Bohrung 3a nach oben bewegen kann. Dabei gelangt die Rippe 22'a des Bolzens 22' in die Nut 53a im Druckstück 53, das sich gegenläufig zum Bolzen 22' bewegt. Dadurch wird in der Gleitphase die Durchbiegung des Skis im Wachsbereich erleichtert.In the operative position of the bending beam 6 (sliding phase), the pedal 52 assumes the position shown in FIG. 6. If the pedal 52 is pressed downward from the front region of the ski boot against the force of the compression spring 57, the two sliders 50 are displaced outwards against the influence of the compression springs 51, so that the bolt 22 'moves upwards in the bore 3a can. The rib 22'a of the bolt 22 'enters the groove 53a in the pressure piece 53 which moves in the opposite direction to the bolt 22'. This makes it easier for the ski to bend in the wax area during the gliding phase.

Wird jedoch das Gewicht des Skiläufers vom vorderen Bereich des Skischuhs auf den hinteren Bereich desselben, den Absatzbereich, verlagert, so kehrt das Pedal 52, unterstützt von der Druckfeder 57, in die in Fig. 6 dargestellte Stellung zurück. Sofern der Ski nicht durchgebogen ist, verschiebt sich der Bolzen 22' in der Bohrung 3a wieder nach unten. Dadurch können aber die beiden Schieber 50 durch die Kraft der Federn 57 gegen die Achse des Bolzens 22' hin verstellt werden und letzteren in der Spannstellung veriegeln. Im Gegensatz zu den vorangehenden Ausführungsbeispielen sind bei dieser Ausführungsform nur ein gespannter und ein entspannter Zustand des Ski möglich, Zwischenlagen hingegen sind ausgeschlossen.However, if the weight of the skier is shifted from the front area of the ski boot to the rear area of the same, the heel area, the pedal 52, supported by the compression spring 57, returns to the position shown in FIG. 6. If the ski is not bent, the bolt 22 'in the bore 3a moves down again. As a result, however, the two slides 50 can be adjusted against the axis of the bolt 22 'by the force of the springs 57 and can lock the latter in the tensioned position. In contrast to the preceding exemplary embodiments, in this embodiment only a tensioned and a relaxed state of the ski are possible, but intermediate layers are excluded.

In den Fig. 8 und 9 ist mit 3 der Obergurt und mit 6 der Biegebalken des Langlaufski, im weiteren Ski 1, mit einstellbarer Steifigkeit, bezeichnet. Der Biegebalken 6 trägt einen Zapfen 22, welcher in Verbindung mit einem noch näher zu beschreibenden Schieber 60 zur Veränderung der Vorspannung des Biegebalkens 6 dient. Auf dem Obergurt 3 ist eine übliche, nur schematisch dargestellte Langlaufbindung befestigt. Zwischen dem Obergurt 3 und dem Biegebalken 6 befindet sich ein freier Raum 5a, der zur Aufnahme des Schiebers 60 dient. Dieser Schieber 60 besitzt einen eine Schrägfläche tragenden, sich im Raum 5a in Skilängsrichtung erstreckenden Bereich 60a, einen senkrecht zu diesem angeordneten Querteil 60b, der einen Schlitz 3a im Obergurt 3 durchsetzt, einen auf der Oberseite des Obergurtes 3 gelagerten Bereich 60c, der mit einem Handgriff 60d versehen ist, sowie einen Abdeckbereich 60e, der sich vom Querteil 60b nach der dem Bereich 60c gegenüberliegenden Seite er - streckt. Der Bereich 60c ist mittels zweier Führungsschienen 61, die auf der Oberseite des Obergurtes 3 befestigt sind, in Skilängsrichtung geführt.8 and 9, 3 denotes the upper flange and 6 the bending beam of the cross-country ski, in the further ski 1, with adjustable rigidity. The bending beam 6 carries a pin 22 which, in conjunction with a slide 60 to be described in more detail, serves to change the pretension of the bending beam 6. A conventional cross-country binding, only shown schematically, is attached to the upper flange 3. There is a free space 5a between the upper flange 3 and the bending beam 6, which serves to receive the slide 60. This slider 60 has an area 60a which carries an inclined surface and extends in the longitudinal direction of the ski in the space 5a, a transverse part 60b which is arranged perpendicularly to this and which passes through a slot 3a in the upper chord 3, an area 60c which is mounted on the upper side of the upper chord 3 and which has a Handle 60d is provided, as well as a cover area 60e, which extends from the transverse part 60b to the side opposite the area 60c. The area 60c is guided in the longitudinal direction of the ski by means of two guide rails 61 which are fastened on the upper side of the upper flange 3.

Durch Verstellen des Schiebers 60 in Skilängsrichtung kann die Steifigkeit bzw. die Wölbung des Ski 1 in Zusammenwirken mit dem Zapfen 22 verändert werden. Nach Fig. 8 ist nämlich zwischen dem Zapfen 22 und der Schrägfläche des Schiebers 60 im unbelasteten Zustand des Ski 1 ein Freiraum vorhanden. Dieser Freiraum wird mit zunehmender Belastung durch den Skiläufer verringert, bis die Schrägfläche des Schiebers 60 an dem Zapfen 22 ansteht. Bis zu diesem Zeitpunkt ist der Ski 1 relativ weich.By adjusting the slider 60 in the longitudinal direction of the ski, the rigidity or the curvature of the ski 1 can be changed in cooperation with the pin 22. According to FIG. 8, there is a free space between the pin 22 and the inclined surface of the slider 60 in the unloaded state of the ski 1. This space is reduced with increasing stress from the skier until the inclined surface of the slider 60 abuts the pin 22. Up to this point, the ski 1 has been relatively soft.

Bei weiterer Belastung des Ski 1 wirkt der Biegebalken 6 als tragendes Element mit, was zu einer Versteifung des Ski führt.When the ski 1 is subjected to a further load, the bending beam 6 acts as a load-bearing element, which leads to a stiffening of the ski.

Wird jedoch die Schrägfläche des Schiebers 60 bereits im unbelasteten Zustand des Ski 1 mit dem Zapfen 22 in Berührung gebracht, so tritt die Versteifung des Ski 1 schon von Anfang einer Belastung an ein.However, if the inclined surface of the slider 60 is brought into contact with the pin 22 in the unloaded state of the ski 1, the stiffening of the ski 1 occurs from the beginning of a load.

Wird von dieser Stellung des Schiebers 60 in Fig. 1 der Schieber noch weiter nach links verschoben, so tritt eine zusätzliche Vorspannung des Biegebalkens 6 gegenüber dem Ski 1 ein, wodurch eine Vergrößerung der Wölbung herbeigeführt wird.If, from this position of the slider 60 in FIG. 1, the slider is moved even further to the left, the bending beam 6 is additionally pretensioned in relation to the ski 1, which causes an increase in the curvature.

Der Schlitz 3a im Obergurt 3 ist mittels des Abdeckbereiches 60e des Schiebers 60 gegen das Eindringen von Schnee in den freien Raum 5a abgedeckt.The slot 3a in the upper chord 3 is covered by the covering area 60e of the slider 60 against the penetration of snow into the free space 5a.

Die Ausführungsform gemäß Fig. 10 ist der ersten sehr ähnlich. Sie unterscheidet sich von dieser lediglich dadurch, daß der Bereich 70c des Schiebers 70 mit einer Zahnstange 70f versehen ist, welche mit einem Ritzel 72 kämmt, das auf einer Welle 73 befestigt ist. Diese Welle 73 ist senkrecht zur Skioberseite angeordnet und im Skikörper 1 drehbar gelagert. Das obere Ende der Welle 73 trägt einen Drehknopf 74, welcher an seinem Umfang gerändelt ist und zum Angriff der Finger des Benützers dient. Auf diese Weise ist eine feinfühlige Einstellung des Schiebers 70 möglich.10 is very similar to the first. It differs from this only in that the area 70c of the slide 70 is provided with a toothed rack 70f which meshes with a pinion 72 which is fastened on a shaft 73. This shaft 73 is arranged perpendicular to the top of the ski and rotatably mounted in the ski body 1. The upper end of the shaft 73 carries a rotary knob 74 which is knurled on its circumference and is used to attack the fingers of the user. In this way, a sensitive adjustment of the slide 70 is possible.

Die in den Fig. 11-13 dargestellte Ausführungsform unterscheidet sich von den beiden vorhergehenden dadurch, daß der Handgriff 80d mittels eines Bolzens auf dem die Schrägfläche tragenden Bereich 80a des Schiebers 80 befestigt ist. Dieser Bolzen durchsetzt einen Schlitz 3a im Obergurt 3 des Ski 1. Zu beiden Seiten des Schlitzes 3a ist eine Skala 81 auf der Oberseite des Obergurtes 3 angebracht, die ein Ablesen der eingestellten Steifigkeit des Skis ermöglicht. Der Schieber 80 ist an Führungsleisten 82 geführt, welche in diejenigen Abschnitten des Skikernes eingelassen sind, die sich zu beiden Seiten des Biegebalkens 6 befinden.The embodiment shown in FIGS. 11-13 differs from the two previous ones in that the handle 80d is fastened by means of a bolt on the area 80a of the slide 80 which supports the inclined surface. This bolt passes through a slot 3a in the upper belt 3 of the ski 1. On both sides of the slot 3a there is a scale 81 on the upper side of the upper belt 3, which enables the set stiffness of the ski to be read. The slider 80 is guided on guide strips 82 which are embedded in those sections of the ski core which are located on both sides of the bending beam 6.

Eine Variante zur letzten Ausführungsform ist in Fig. 14 dargestellt. Bei dieser Variante ist der Handgriff 90d als Querbalken ausgebildet, der mit Hilfe von zwei auf die Skioberseite vertikalen Bolzen, welche Längsschlitze 3a im Obergurt 3 des Ski durchsetzen, mit dem nicht dargestellten, die Schrägfläche tragenden Bereich des Schiebers verbunden ist.A variant of the last embodiment is shown in FIG. 14. In this variant, the handle 90d is designed as a crossbeam, which is connected to the region of the slider, which does not show the sloping surface, by means of two vertical bolts on the upper side of the ski which penetrate longitudinal slots 3a in the upper flange 3 of the ski.

Eine letzte Ausführungsform ist in den Fig. 15 und 16 wiedergegeben. Bei dieser Ausführungsform wird anstelle eines Längsschiebers, wie er bei den vorhergehenden Ausführungsbeispielen vorhanden ist, ein Drehschieber 100 verwendet. der an seiner Unterseite von einer Wendelfläche 100g begrenzt ist. Dieser Drehschieber 100 sitzt auf einer Welle 101, welche den Obergurt 3 durchsetzt und an ihrem oberen Ende eine an ihrem Umfang gerändelte, mit einer Skala versehene Scheibe 102 trägt, die zum Angriff der Finger des Benützers dient. Am Drehschieber 100 ist im Bereich der den Anfang und das Ende der Wendelfläche 100 begrenzenden, in Richtung der Welle 101 verlaufenden, radialen Wand 100h ein Anschlag 100i angeordnet, der zur Anlage an dem Zapfen 22 des Biegebalkens 6 bestimmt ist.A last embodiment is shown in FIGS. 15 and 16. In this embodiment, a rotary slide valve 100 is used instead of a longitudinal slide valve, as is present in the previous exemplary embodiments. which is delimited on its underside by a spiral surface 100g. This rotary valve 100 is seated on a shaft 101, which is the upper chord 3 penetrates and carries at its upper end a knurled disc 102, which is provided with a scale and which serves to attack the fingers of the user. A stop 100i is arranged on the rotary slide valve 100 in the area of the radial wall 100h which delimits the beginning and the end of the helical surface 100 and runs in the direction of the shaft 101 and which is intended to bear against the pin 22 of the bending beam 6.

Um bei allen Ausführungsformen ein ungewolltes Verschieben bzw. ein Verdrehen des Schiebers zuverlässig zu verhindern, kann der Schieber bzw. die Einstellscheibe in der gewählten Lage durch ein von einer Druckfeder belastetes, in der Zeichnung nicht dargestelltes Rastelement festgehalten werden.In order to reliably prevent unwanted displacement or twisting of the slider in all embodiments, the slider or the adjusting disk can be held in the selected position by a locking element which is loaded by a compression spring and is not shown in the drawing.

Selbstverständlich ist die Erfindung keineswegs an die in der Zeichnung dargestellten und im vorstehenden beschriebenen Ausführungsbeispiele gebunden. Vielmehr sind verschiedene Abänderungen derselben möglich, ohne den Rahmen der Erfindung zu verlassen. Beispielsweise könnte auch die mit dem Ritzel kämmende Zahnstange unterhalb des Obergurtes in Führungen geführt sein, so daß dann der gesamte Schieber innerhalb des Raumes 5a angeordnet ist.Of course, the invention is by no means bound to the exemplary embodiments shown in the drawing and described above. Rather, various modifications thereof are possible without leaving the scope of the invention. For example, the toothed rack meshing with the pinion could also be guided in guides below the upper chord, so that the entire slide is then arranged within space 5a.

Claims (28)

1. A ski (1), particularly cross-country ski, adapted to have its bending stiffness adjusted by means of at least one bending girder (6) extending in the longitudinal direction of the ski and disposed within said ski (1) at a central section thereof in a symmetric position with respect to the vertical longitudinal center plane of the ski (1), characterized in that said bending girder (6) is supported within the body of the ski only at its two ends on support surfaces (7, 8) extending substantially parallel to the sliding surface and has its side facing away from said support surfaces subjected to the action of a pressure element (11, 60, 80, 100) being supported in the body of the ski at a location adjacent the top side thereof.
2. A ski (1), particularly cross-country ski, adapted to have its bending stiffness adjusted by means of at least one bending girder (6) extending in the longitudinal direction of the ski and disposed within said ski (1) at a central section thereof in a symmetric position with respect to the vertical longitudinal center plane of the ski, characterized in that said bending girder (6) is supported within the body of the ski only at its two ends on support surfaces (7, 8) extending substantially parallel to the running surface and has its side facing away from said support surfaces connected to a pressure transmitting member (22) operable by a control mechanism actuated by the boot of the skier to exert a pressure on said bending girder (6).
3. A ski according to claim 2, characterized in that said control mechanism comprises a sole plate (36, 44) pivotally mounted about a transverse axis (35a, 43) on the top surface of the ski.
4. A ski according to any of claims 1 to 3, characterized in that said bending girder (6) has a I-section reinforced adjacent its two ends and preferably also at its central portion (fig. 2).
5. A ski according to claim 1, characterized in that said pressure element (11) is in the form of a screw (11) mounted in a threaded bore of a plate (9) secured to the upper chord (3) of said ski (1) or within said ski, respectively (fig. 1).
6. A ski according to claim 2, characterized in that said pressure transmitting member is in the form of a bolt (22) extending perpendicular to said bending girder (6) and secured thereto, said bolt (22) being vertically guided in a bore (3a) formed in the upper chord (3) and adapted to be subjected to the action of a slide member (20, 30, 40) displaceably guided in the longitudinal direction of the ski and actiong as said control mechanism.
7. A ski according to claim 6, characterized in that said slide member (20, 30, 40) is displaceably guided in the longitudinal direction fo the ski in guide rails (21, 33,41) on said upper chord (3) in a manner preventing it to be lifted off the ski.
8. A ski according to claim 7, characterized in that said slide member (20) has a planar surface (20a) extending at an acute angle with respect to said upper chord (3).
9. A ski according to claim 7, characterized in that said sliding member (30, 40) comprises a convex arcuate surface (31, 40a) extending at an acute angle with respect to said upper chord (3).
10. A ski according to any of claims 7 to 9, characterized in that said slide member (20) is operatively connected by a linkage (24, 29) to said sole plate (26) hingedly mounted at its forward end (fig. 3).
11. A ski according to any of claims 7 to 9, characterized in that said slide member (30, 40) is subjected to the action of a spring, preferably a compression spring (34, 42) (figs. 4 and 5).
12. A ski according to any of claims 7 to 9 and 11, characterized in that the side of said slide member (30) facing towards said sole plate (36) is formed with a concave arcuate control surface (32) cooperating with one end of said sole plate (36), the latter being pivotally mounted at its central portion (fig. 4).
13. A ski according to claim 12, characterized in that the end of said sole plate (36) facing said control surface (32) is provided with at least one roller (37).
14. A ski according to any of claims 7 to 9 and 11, characterized in that said slide member (40) is formed with an arcuate slot opening (47) extending in the longitudinal direction of the ski and engaged by a bolt (46) mounted on the ends of two projections (45) disposed on a pivotally mounted sole plate (44) (fig. 5).
15. A ski according to claim 2, characterized in that said pressure transmitting member is in the form of a bolt (22') extending perpendicular to said bending girder (6) and secured thereto, said bolt being guided in a bore (3a) in said upper chord (3) for upwards and downwards displacement and retained by one or two slide member(s) (50) mounted for adjustment parallel to the top surface of the ski against the force of springs (51 said sliding member(s) being adapted to be displaced by a pressure member (53) having a wedge-shaped bottom surface and mounted above said sliding member(s) (50) for adjustment by means of a pedal (52) actuated by a front portion of a ski boot. (figs. 6 and 7).
16. A ski according to claim 15, characterized in that the upper end of said bolt (22') carries a rib (22'a) of rectangular cross-sectional shape for cooperation with a groove (33a) of rectangular cross-sectional shape formed in said pressure member (53).
17. A ski according to claim 16, characterized in that said rib (22'a) and said groove (53a) extend in the sliding direction of said sliding member(s) (50).
18. A ski according to claim 1, characterized in that said pressure element is formed as a slide member (60, 70, 80, 90, 100) provided with an inclined surface, the portion (60a, 70a, 80a, 90a, 100a) of said slide member preferably formed with said inclined surface being at least partially accommodated in a recess (5a) extending between said bending girder (6) and said upper chord (3) of the ski (figs. 8-16).
19. A ski according to claim 18, characterized in that the portion (60a, 70a) of said slide member (60, 70) formed with said inclined surface is rigidly connected by means of a cross member (60b) guided in a longitudinal slot (3a) of said upper chord (3) to a slidable portion (60c, 70c) on the top surface of said upper chord (3) optionally provided with a handle (60d) (figs. 8-10).
20. A ski according to claim 19, characterized in that the portion (60c, 70c) of said slide member (60, 70) optionally provided with said handle (70d) is guided in guide rails (61, 71) secured to the top surface of the ski.
21. A ski according to claim 20, characterized in that said portion (70c) of said slide member (70) guided in said guide rails (71) is formed as a rack extending in the direction of its displacement, said rack being guided between said guide rails (71) for adjustment in the longitudinal direction of the ski by means of a pinion (72) having a shaft (73) rotatably mounted on or in the ski and carrying a rotary knob (74) (fig. 10).
22. A ski according to claim 18, characterized in that the portion (80a) of said slide member (80) formed with said inclined surface is guided in guides (82) disposed below said upper chord (3) for displacement in the longitudinal direction of the ski (figs. 11 to 13).
23. A ski according to claim 22, characterized in that said portion (80a) of said slide member (80) formed with said inclined surface has at least one bolt secured thereto perpendicular to the top surface of the ski, said bolt carrying a handle (80d, 90d) and being guided in a slot (3a) of said upper chord (3) (figs. 11-14).
24. A ski according to claim 23, characterized in that a scale (81) is disposed on at least one longitudinal side of said slot (3) for cooperation with said handle (80d) (figs. 11-13).
25. A ski according to claim 18, characterized in that the portion (100g) of said slot member (100) formed with said inclined surface is constructed in the manner of a rotary slide member, the shaft of which is offset with respect to said bolt (22), and the bottom surface of which facing towards said bolt (22) of said bending girder (6) is formed as a helical surface (figs. 15 and 16).
26. A ski according to claim 25, characterized in that said shaft (101) connects said portion (100g) of said slide member (100) formed with said inclined surface to a crenelated scale disc (102) cooperating with a marking on the top surface of the ski, said portion carrying a stop (100i) adapted on rotation of said shaft (101) to abut said bolt (22) of said bending girder (6) to thereby limit the rotary angle of the rotary slide member.
27. A ski according to any of claims 18 to 26, characterized in that said sliding member or said scale disc, respectively, is arrested in the selected position by detent means biased by a compression spring.
EP85100663A 1984-02-10 1985-01-23 Ski de fond Expired EP0151975B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
AT42584A AT379743B (en) 1984-02-10 1984-02-10 SKIING, IN PARTICULAR CROSS-COUNTRY SKIING
AT425/84 1984-02-10
AT1656/84 1984-05-18
AT165684A AT383495B (en) 1984-05-18 1984-05-18 SKIING, IN PARTICULAR CROSS-COUNTRY SKIING

Publications (3)

Publication Number Publication Date
EP0151975A2 EP0151975A2 (en) 1985-08-21
EP0151975A3 EP0151975A3 (en) 1987-02-25
EP0151975B1 true EP0151975B1 (en) 1988-08-17

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Application Number Title Priority Date Filing Date
EP85100663A Expired EP0151975B1 (en) 1984-02-10 1985-01-23 Ski de fond

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US (1) US4754989A (en)
EP (1) EP0151975B1 (en)
DE (1) DE3564376D1 (en)

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ATE130204T1 (en) * 1990-12-27 1995-12-15 Marker Deutschland Gmbh CARRIER PLATE FOR SAFETY SKI BINDINGS.
FR2719782B1 (en) * 1994-05-11 1997-08-08 Salomon Sa Device for cross-country skiing and skiing equipped with such a device.
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
US6604754B1 (en) * 1999-10-07 2003-08-12 Kaj Gyr Integral suspension system for skis
FR2812211B1 (en) * 2000-07-28 2003-02-07 Salomon Sa SLIDING BOARD
SI21914A (en) * 2004-12-06 2006-06-30 Eiger D.O.O., Ljubljana Underlay plate with asymmetricity setting function for ski with expressed side curvature
WO2010060201A1 (en) * 2008-11-27 2010-06-03 Michel-Olivier Huard Camber adjustment system and method for snow-riding devices
US9305120B2 (en) 2011-04-29 2016-04-05 Bryan Marc Failing Sports board configuration
SE537602C2 (en) * 2011-12-16 2015-07-21 Mats Cedervall Cross-country skiing for the practice of classic cross-country skiing
NO20120113A1 (en) * 2012-02-02 2013-08-05 Morten Aas Teigen Ski with flexible underside
SE537616C2 (en) * 2013-02-28 2015-08-04 Ulf Ekström Cross Country Skiing
WO2015094081A1 (en) * 2013-12-16 2015-06-25 Inadco Ab Ski and method for manufacturing a ski

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DE140422C (en) *
DE735464C (en) * 1938-05-04 1943-05-15 Karl Messner Automatic return protection for skis
US2258046A (en) * 1940-05-24 1941-10-07 Clement Manufacture Enregistre Ski
FR1109560A (en) * 1954-07-31 1956-01-31 Improvements to skis
DE1302470B (en) * 1962-01-09
US3300226A (en) * 1964-09-28 1967-01-24 Jr Charles L Reed Ski construction and method for varying the flexibility thereof
DE1428941A1 (en) * 1964-12-19 1969-04-30 Mutzhas Dr Maximilian Friedric Procedure for changing the elasticity of a ski
DE1298024B (en) * 1965-02-26 1969-06-19 Maximilian Friedrich Dr Ing Device for changing the suspension capacity of a ski
FR1467141A (en) * 1965-12-13 1967-01-27 Beauvais Diesel Improvements to skis
US3849963A (en) * 1973-05-04 1974-11-26 H Harmon Beam construction
US4300786A (en) * 1979-12-19 1981-11-17 Johnson Wax Associates Snow ski with adjustable camber
SE436690B (en) * 1983-05-20 1985-01-21 Eriksson Karl G V DEVICE FOR SKI WITH VARIABLE SPAN

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Publication number Publication date
EP0151975A2 (en) 1985-08-21
US4754989A (en) 1988-07-05
EP0151975A3 (en) 1987-02-25
DE3564376D1 (en) 1988-09-22

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