US3907318A - Safety binding for ski boots - Google Patents

Safety binding for ski boots Download PDF

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Publication number
US3907318A
US3907318A US358329A US35832973A US3907318A US 3907318 A US3907318 A US 3907318A US 358329 A US358329 A US 358329A US 35832973 A US35832973 A US 35832973A US 3907318 A US3907318 A US 3907318A
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United States
Prior art keywords
boot
lever means
binding
ski
levers
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Expired - Lifetime
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US358329A
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English (en)
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Georges Pierre Joseph Salomon
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Individual
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Individual
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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
    • A63C9/08—Ski bindings yieldable or self-releasing in the event of an accident, i.e. safety bindings
    • A63C9/086—Ski bindings yieldable or self-releasing in the event of an accident, i.e. safety bindings using parts which are fixed on the shoe of the user and are releasable from the ski binding

Definitions

  • ABSTRACT The binding comprises two articulated levers urged towards the boot by a spring. one end of which rests against the binding element and the other against a moving piston which also rest against the two levers. The relative positions of the axes of rotation of the two levers and of the contact zones between the piston and the levers, ensure that the lateral release stress is independent of the longitudinal position of the boot on the ski.
  • the binding is especially designed to ensure that the lateral release load is independent of the longitudinal position of the boot on the ski.
  • the longitudinal position of the boot on the ski may vary in relation to the locking mechanism for a variety of reasons, of which the main ones are as follows: the skier may have several pairs of boots of different lengths, or he may switch from left to right; the ski bends when passing over an obstacle.
  • the binding disclosed in German Pat. No. 1,573,773 relates to a device consisting of two levers mounted symmetrically in relation to the longitudinal axis of the ski and each hinged in relation to a fixed axis of the binding.
  • the ends of these two levers rest against the boot, against which they are pressed by a single spring arranged along the axis of theski.
  • One end of the spring rests against the binding element, and the other end, by means of'a piston, on two ramps each integral with the levers.
  • the arrangement of the ramps on the levers makes it impossible to obtain a releasing force independent of the longitudinal position.
  • One of the locking systems consists of a spring which presses a moving piston against the boot.
  • the greater the compression of the spring the higher the load required for lateral safety release,so that the lateral re-' leasing load increases as the boot moves and compresses the spring.
  • This binding also has another disadvantage, namely that the boot held between points is relatively free to rotate about itself, and it is therefore not held very flat on the ski.
  • the binding described in Austrian Pat.-No. 277,834 appears to have the same advantage as the binding according to the present invention; the lateral releasing force appears to be constant and independent of the position of the boot.
  • This binding has the disadvantage of being astatic. It consists of two levers mounted symmetrically in relation to the longitudinal axis of the ski and hinged at one of their ends to a fixed point in the binding. The free ends of these two levers rest against the boot and they are urged towards each other, and pressed against the boot, by means of a return spring which connects them. A metal distance piece integral with the binding is located between the two levers and keeps them apart in the absence of the boot. This binding is astatic, since ifthe boot moves towards the stop, it spreads the levers apart, and the latter no longer bear against the distance piece and therefore have play. I
  • the binding according to the present invention is designed to overcome these various disadvantages. According to one preferred embodiment, it,co nsists of a plate temporarily secured to the boot and held at its two ends by two lockingsystems. At least one of the locking systems comprises two levers which are hinged in relation to the binding. These two levers are pressed against the plate by means ofa spring, one end of which rests against the binding element, while the other end rests against a moving piston which itself rests against the two levers.
  • the plane of contact between the piston and at least one of the two levers is substantially perpendicular to the direction of the load applied by the spring to the levers.
  • the plane containing thezones of contact between the moving piston and the two levers passes substantially through the hinge axes of the levers.
  • the boot is adapted to move between two adjacent positions lo cated on each side of the plane passing through the hinge axes; in the first of these positions,-the boot -is held to the ski, and in the second position the boot is released.
  • bindings have been designed according to this principle. As a result of several trials made, it has been found that these bindings have various advantages. One remarkable thing is that the safety feature always releases laterally very precisely at the same value of the lateral component ofthe releasing'load, regardless of the longitudinal position of the boot in the binding.
  • two bindings identical from-the mechanical point'of view may be designed on different principles.
  • One of them for example,'may have a short path and a very stiff spring, while the other may have a long path and a soft spring/In both cases, the energy stored by the two bindings, prior to release, is the same.
  • the constancy of the lateral releasing load arising from the particular arrangement of the levers must be regarded as a very important advantage.
  • frictional forces between the piston and the body of the binding are substantially nil.
  • the areas in which the piston rests against the lever are perpendicular to the load applied by the spring, so that the component parallel with the areas of support is practically zero.
  • the frictional forces may vary for many reasons (wear in parts, dust, lack of lubrication, freezing, etc.). It is also desirable that the locking mechanism shall have no moving parts rubbing against each other and subject to considerable reaction loads.
  • the binding comprises a manipulating element moving about an axis integral with the body of the binding.
  • This manipulating element cooperates with a slide moving in a longitudinal channel crossing the body of the binding.
  • the slide comprises a cylindrical channel in which are movably mounted the piston and the spring, the latter resting against the body of the slide.
  • the slide is actuated by an eccentric integral with the manipulating element moving in a groove in the slide, the latter moving between two positions: the first position is such that the levers rest against the slide by means of two stops, so that the levers are spaced apart and the skier may place the boot in the binding; the second position is such that the slide is locked to the body of the binding by the eccentric, so that the spring, located in the slide, rests against a part integral with the binding; the spring presses the levers against the plate, as already stated.
  • FIG. 1 is a perspective view of a binding mounted on the ski
  • FIG. 2 is a view from above, in section, of the locking system at the time of a forward fall;
  • FIG. 3 is a view from above, in section, of the locking system at the time of lateral release of the binding;
  • FIG. 4a is a side elevation of the locking system, the manipulating element being at rest;
  • FIG. 4b is a view from above, in half section, of the locking system, the manipulating element being at rest;
  • FIG. 5a is a view from above, in half section, of the locking system, the manipulating element being raised and the levers spaced apart to receive the boot;
  • FIG. 5b is a view from above, in half section, of the locking system, with the manipulating element raised.
  • FIG. I is a perspective view of a binding mounted on the ski.
  • the binding cooperates with a plate 3 temporarily secured to the boot by means of attachments, not shown, secured laterally to two bent rods 9 integral with plate 3.
  • this plate cooperates, by means of its chamfered rear end 8, with a ramp integral with catch 7 attached to ski l at 5 and 6.
  • the forward end 2 of the plate 3 has two lateral ramps 4, only one of which is visible in the perspective view.
  • An element 12 adapted to be manipulated by the skier, is hinged in relation to body 11 of the locking system. The functioning of this element may be seen in FIGS. 4a, 4b, 5a, 512.
  • FIG. 2 shows a view from above, in section, of the locking system facing towards the front of the ski; the two levers 20, 19 are hinged about two vertical axes integral with the body 14 of the locking system.
  • levers I9, 20 rest with their ends against the vertical edge of the skiers boot.
  • This edge may be a vertical plane perpendicular to the longitudinal axis of the ski since, in the event of a lateral release, the sole rotates about a centre located substantially under the heel.
  • FIG. 2 shows a sole slightly arched along a continuous curve.
  • the two ramps 4 are at an angle to the longitudinal axis of the ski and are connected by a short flat section perpendicular to the axis of the ski.
  • the two levers 19,20 are pressed against the boot by a piston 26 actuated by a spring 25.
  • the contact areas 29, between piston 26 and cylindrical profiles 92,93 of levers 19,20 are located between hinge axes 21,22 and areas 90,91 of support on the boot.
  • the supporting area of a lever and the axis of rotation thereof are located on each side of the longitudinal axis of the binding.
  • Manipulating element 5 rotates about a horizontal axis integral with element 14 of the locking system.
  • This manipulating element consists of two eccentrics 16 arranged on each side of the locking system. Each eccentric 16 is engaged in a vertical groove 17 of a slide 18. The slide moves horizontally in a cylindrical channel 24 drilled in body 14 of the locking system along the longitudinal axis 28 of the ski.
  • Manipulating element 15 moves between two positions; in one of the positions, the position of rest, slide 18 is locked to body 14 of the locking system by eccentric 16.
  • FIGS. 4a, 4b, 5a, 5b show how the eccentric makes it possible to lock the slide to the locking system. These figures also show the positions of the various parts of the binding when the manipulating element is in the second position.
  • a second cylindrical channel 33 is arranged along the longitudinal axis 28 of the slide.
  • a piston 26 moves horizontally in this second cylindrical channel 33.
  • a compression spring 25 is housed, along the axis of this channel. within the piston. one end of the spring resting on the piston and the other against the slide through a system of threads 34 which makes it possible to adjust the rate of compression of the spring.
  • This system of threads consists of a nut 82 prevented from rotating in relation to the slide, but adapted to move axially.
  • the piston rests on levers 19,20 in areas located substantially along axis 28 of the locking system.
  • the outer surface of the piston, which bears against the levers is flat and perpendicular to the longitudinal axis of the ski, so that this surface 27 is perpendicular to the direction of the force F applied by spring 25 to the levers.
  • contact areas 29, between the piston and the two levers are located, substantially permanently. is a same plane 81 perpendicular to the direction of the force F applied by the spring.
  • the position of the locking system, and of the outer surface of the piston is such that the axes of rotation 21,22 of levers 19,20, and contact areas 29, are located, substantially permanently, in a same plane 81.
  • FIG. 3 is a view from above, in section, of the'locking system during lateral release of the binding.
  • boot 43 subjected to a lateral torsion load, moves in the direction of arrow 44.
  • lever 35 pivots about its axis 21 and pushes piston 26, with which it is in contact at 39, whereupon lever 36 is no longer acted upon by spring 25.
  • the lateral releasing load is substantially independent of the longitudinal position of the boot.
  • the wings move apart, and there is a change in the angle of the holding force applied to the boot or the plate.
  • each lever is provided with an upper edge, this edge being applied to the front horizontal edge of the sole and preventing the boot from being released in a rearward fall. In order to simplify the figures, this edge on the levers is not shown.
  • the levers could be applied directly to the upper of the boot; in this case, they would be above the horizontal edge of the sole and they would no longer have to be fitted with an edge.
  • the levers could be applied to a part fitted to I the boot, for instance a plate, it is possible for this plate to have a sloping shape, as shown in FIG. 1, in order to allow the binding to execute a safety release in the event of a rearward fall.
  • FIG. 4a is a side elevation of the locking system, showing the manipulating element at rest. Body 51 of the locking system may be seen in this figure.
  • the manipulating element 50 shown at rest, moves about an axis 54 which is fixed in relation to the body of the locking system.
  • An eccentric 53 integral with the manipulating element, moves in a groove 52in slide 55. With the manipulating element in this position, the eccentric is located below the horizontal plane passing through the axis of rotation of the manipulating element, the latter being stopped against body 51 so that the slide is locked to body 51 of the locking system and cannot retreat in the direction of arrow 56 under the action of a force applied in this direction.
  • FIG. 4b is a half-section from above of the locking system. with the manipulating element at rest.
  • levers 57,58 rest, through stops 6 60, against ramp 62 integral with slide 63, so that locking spring59 remains compressed, piston 61 resting against ramps 64 integral with the lever.
  • FIGS. 5a and 51 show, respectively, a side elevation and a half-section from above of the locking system, with the manipulating element raised.
  • slide 65 is moved by eccentric 67 in the direction of arrow 69.
  • Slide 65 in its withdrawing movement, carries along levers 72 which pivot in the direction of arrow 73 about their axis 74.
  • ramp 71 integral with slide 65, holds stop for lever 25, causing the latter to rotate as it withdraws in the direction of arrow 69.
  • Locking spring 75 secured to the slide, is also carried along during this movement, so that the rotation of the levers does not take place against the action of the locking spring. The skier may thus operate the manipulating element 66 without any great effort.
  • the skier therefore has no difficulty in introducing his boot into the binding.
  • the skier presses the manipulating element down.
  • the axis of rotation provided for the right-hand retaining lever is located to the left of the longitudinal axis of the ski, and vice-versa', this provides a crossed arrangement of the levers.
  • the right-hand lever might also pivot about an axis located to the right of the longitudinal axis of the ski, in which case it would be preferable to provide a tension spring instead of a compression spring.
  • the crossed levers, and the spring which actuates them could also be a part of the piece. fitted to the boot', in which case the ramp would be the ski.
  • a safety ski binding including two locking systems binding the opposite ends of a boot to a ski, at least one of said locking systems resiliently holding said boot to said ski in both lateral and longitudinal directions, comprising: a body; a pair of lever means, each having a portion thereof cooperating with one of said opposite ends of said boot, each said lever means hingedly mounted in relation to said body and being tiltable forwardly and rearwardly with respect to the ski according to longitudinal positions of said boot on said ski; spring means for applying each said portion of said lever means against said boot having one end resting against said body and the opposite end acting on said lever means; the contact areas of said lever means with said opposite end of said spring means defining, for various longitudinal positions of said boot on said ski, tangent planes perpendicular to the direction of the force ex.- erted by said spring means; said contact areas being consistently adjacent to a plane extending through the hinge axes of said lever means; said plane extending through the hinge axes of said lever means being perpendicular to the direction of said force exerted by
  • the contact area between the spring means and at least one lever means being on the other side of the plane passing through the hinge axes of said lever means.
  • a binding according to claim 4, wherein the other end of the fitted piece comprises a sloping ramp cooperating with the other locking system; said other locking system including a catch integral with the ski so that the boot moves toward said first end, when it is subjected to a vertical load.
  • a safety ski binding including two locking systems binding the opposite ends of a boot to a ski, at least one of said locking systems resiliently holding said boot to said ski in both lateral and longitudinal directions, comprising: a body; two lever means, each having a portion thereof cooperating with one of said opposite ends of said boot, each said lever means hingedly mounted in relation to said body and being tiltable forwardly and rearwardly with respect to the ski according to longitudinal positions of said boot on said ski said lever means being mounted symmetrically in relation to the longitudinal axis of the binding; a compression spring arranged along the longitudinal axis of the binding for applying each said portion of said lever means against said boot, one end of said spring resting against the body, the opposite end resting against a piston; said piston resting against said two lever means and moving in a longitudinal channel housed in a part temporarily integral with said body of said locking system so that the force applied by said spring is in the direction of said longitudinal axis; the supporting surface of said piston being flat and perpendicular to said longitudinal axis of the binding
  • a binding according to claim 8 wherein the contact areas, between the moving piston and the levers, are located on the levers betweenthe hinge centres and the areas in which the lever arms restagainst the corresponding ends of the boot.
  • a binding according to claim 1 further comprising: a slide movingin a longitudinal channel crossing the body of said locking system; a manipulating element moving around an axis integral with the body of the binding and cooperating with the slide; said slide actuated by the manipulating element moving between two positions: a first position, in which the two levers rest, through two stops, against a ramp integral with the slide so that the levers are spaced apart and the skier may introduce his boot into the binding; a second position in which the levers rest against the corresponding end of the boot.
  • a binding according to claim 10 wherein said slide comprises a cylindrical channel in which the piston and the spring are adapted to move, said spring resting against the body of the slide; said slide being actuated by said manipulating element by means of an eccentric integral with said manipulating element and moving in a groove in the slide so that, in the second position, the slide is locked to the body of the binding.

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  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
US358329A 1972-05-10 1973-05-08 Safety binding for ski boots Expired - Lifetime US3907318A (en)

Applications Claiming Priority (1)

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FR7216741A FR2183564B1 (US20100029827A1-20100204-C00018.png) 1972-05-10 1972-05-10

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US3907318A true US3907318A (en) 1975-09-23

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US358329A Expired - Lifetime US3907318A (en) 1972-05-10 1973-05-08 Safety binding for ski boots

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US (1) US3907318A (US20100029827A1-20100204-C00018.png)
JP (1) JPS4948425A (US20100029827A1-20100204-C00018.png)
AT (1) AT332274B (US20100029827A1-20100204-C00018.png)
CA (1) CA995268A (US20100029827A1-20100204-C00018.png)
CH (1) CH568079A5 (US20100029827A1-20100204-C00018.png)
DE (1) DE2322951A1 (US20100029827A1-20100204-C00018.png)
FR (1) FR2183564B1 (US20100029827A1-20100204-C00018.png)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5240275A (en) * 1990-03-29 1993-08-31 Roland Jungkind Safety ski binding having a pivotable sole plate

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19600102A1 (de) * 1996-01-03 1997-07-10 Simon Burger Auslösevorrichtung für Skibindungen

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3432179A (en) * 1965-06-03 1969-03-11 Hannes Marker Toe iron for safety ski-bindings
US3822071A (en) * 1971-05-28 1974-07-02 Gertsch Ag Ski binding part

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3432179A (en) * 1965-06-03 1969-03-11 Hannes Marker Toe iron for safety ski-bindings
US3822071A (en) * 1971-05-28 1974-07-02 Gertsch Ag Ski binding part

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5240275A (en) * 1990-03-29 1993-08-31 Roland Jungkind Safety ski binding having a pivotable sole plate

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Publication number Publication date
CH568079A5 (US20100029827A1-20100204-C00018.png) 1975-10-31
FR2183564B1 (US20100029827A1-20100204-C00018.png) 1976-03-12
ATA407173A (de) 1975-04-15
AT332274B (de) 1976-09-27
DE2322951A1 (de) 1973-11-22
JPS4948425A (US20100029827A1-20100204-C00018.png) 1974-05-10
FR2183564A1 (US20100029827A1-20100204-C00018.png) 1973-12-21
CA995268A (en) 1976-08-17

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