EP0734278A1 - Appareillage permettant la pratique du ski alpin a un skieur handicape des jambes - Google Patents
Appareillage permettant la pratique du ski alpin a un skieur handicape des jambesInfo
- Publication number
- EP0734278A1 EP0734278A1 EP95903831A EP95903831A EP0734278A1 EP 0734278 A1 EP0734278 A1 EP 0734278A1 EP 95903831 A EP95903831 A EP 95903831A EP 95903831 A EP95903831 A EP 95903831A EP 0734278 A1 EP0734278 A1 EP 0734278A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- arm
- axis
- sole
- articulation
- shock absorber
- 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.)
- Withdrawn
Links
- 210000003141 lower extremity Anatomy 0.000 title abstract description 3
- 210000004197 pelvis Anatomy 0.000 claims abstract description 15
- 239000006096 absorbing agent Substances 0.000 claims description 102
- 230000035939 shock Effects 0.000 claims description 100
- 230000006835 compression Effects 0.000 claims description 17
- 238000007906 compression Methods 0.000 claims description 17
- 230000000694 effects Effects 0.000 claims description 11
- 239000007789 gas Substances 0.000 claims description 4
- 210000002414 leg Anatomy 0.000 description 15
- 230000001174 ascending effect Effects 0.000 description 9
- 230000027455 binding Effects 0.000 description 8
- 238000009739 binding Methods 0.000 description 8
- 230000005484 gravity Effects 0.000 description 5
- 230000003068 static effect Effects 0.000 description 4
- 206010033799 Paralysis Diseases 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 230000004069 differentiation Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000000284 resting effect Effects 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 230000002747 voluntary effect Effects 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 210000001217 buttock Anatomy 0.000 description 1
- 244000309466 calf Species 0.000 description 1
- 230000003100 immobilizing effect Effects 0.000 description 1
- 238000012886 linear function Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 210000000689 upper leg Anatomy 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
- A63C2201/00—Use of skates, skis, roller-skates, snowboards and courts
- A63C2201/10—Use of skates, skis, roller-skates, snowboards and courts for handicapped people
Definitions
- Apparatus the age allowing the practice that ski with pi has a ski eur handicap of the legs.
- the present invention relates to an apparatus intended to cooperate with a ski to allow alpine skiing to be practiced by a skier with a leg handicap, the ski having a plane of symmetry and a determined direction of sliding and comprising a determined zone of interface with the skier and the apparatus having a plane of symmetry and comprising:
- a sole capable of being fixed to the ski in the interface zone, in a determined position such that said planes of symmetry coincide, and defining a tilting axis perpendicular to the planes of symmetry and offset forward and upward , with respect to the interface zone, in said determined position and with reference to the sliding direction, when the ski rests on the ground and said planes of symmetry are vertical,
- a telescopic shock absorber articulated on the sole and on the arm around a respective articulation axis located behind the tilting axis, with reference to the direction of sliding, and perpendicular to the planes of symmetry, the axes d articulation being fixed respectively with respect to the sole and with respect to the arm during skiing.
- An apparatus of this type is distributed by the American firm SHADOVV, according to an embodiment in which the damper is articulated directly on the arm, around an axis of articulation situated under the shell for receiving the skier's pelvis; the shock absorber is also articulated on the sole indirectly, by means of a link on which the shock absorber is articulated directly around the corresponding articulation axis and which, itself, is articulated directly on the sole about a pivot axis perpendicular to the planes of symmetry so that:
- this link rests on the sole and the axis of articulation of the shock absorber spring on the link is located substantially at the same distance from the tilt axis as the axis of articulation of the shock absorber spring on the arm, and the shock absorber spring works in compression between the arm and the sole to elastically oppose the relative approximation of the shell and the sole, and - in a chairlift grip position, the link having straightened relative to the sole by pivoting around the pivot axis, it is placed in alignment with the jack to increase the spacing between the receiving shell of the pelvis of the skier and the sole and thus facilitate the grip of the chairlift, the assembly formed by the link and the shock absorber spring then working in traction between the sole and the arm to impose a limit on this relative spacing.
- this known apparatus has an important drawback, namely a small amplitude of possible oscillation of the arm around the tilt axis relative to the sole, insofar as, measured in terms of variation of the distance separating the axes articulation respectively on the arm and on the sole, in the ski practice position, it is limited to the maximum stroke of the shock absorber, generally less than 100 mm and not exceeding, at best, 150 mm depending on the type of shock absorber chosen.
- the present invention provides apparatus of the type indicated in the preamble, characterized in that the articulation axes are spaced differently from the axis tilt and arranged so that the ratio sin c is approximately equal to sin ai 1, where ai and ⁇ 2 denote the values of the angle ⁇ of the dihedron that forms with a plane passing through the axis of tilt and l ' articulation axis of the shock absorber spring on the arm a plane passing through the two articulation axes, inside a prism whose two articulation axes and the tilt axis constitute the edges, respectively when the shock absorber spring is in a state of maximum relaxation, between the two axes of articulation, and when it is in a state of maximum compression, between the two axes of articulation, during skiing.
- the damping spring is inclined relative to the position which it presents in the known apparatus, which makes it possible to increase the possible movement of the arm, around the tilting axis, relative to the sole for a given stroke of the shock absorber spring between its axes of articulation respectively on the arm and on the sole, in the skiing practice position; indeed, it is shown that the ratio of the amplitude of movement of the skier in the direction of approximation vis-à-vis the sole to the shortening which follows for the jack between its axes of articulation respectively on the arm and on the sole is then on the one hand proportional to the ratio of the radius of a circle centered on the tilt axis and passing approximately through the intersection of the arm with the vertical of the center of gravity of the skier to the radius of a circle centered on the tilt axis and passing through the axis of articulation of the shock absorber spring on the arm, in the ski practice position, and on the other hand inversely proportional to sinus ⁇ .
- the shock absorber spring is chosen of a type which at least approximately respects the relationship F- a, where x denotes the maximum possible curve of the shock absorber spring, in compression between the two articulation axes, from the state of maximum relaxation, e the effective depression of the shock absorber spring, from the state of relaxation maximum, between the two articulation axes, F the compression or reaction force of the shock absorber spring corresponding to this depression e, ⁇ the thermodynamic constant of the ideal gases, and has a constant characteristic of the shock absorber spring.
- a hardening of the reaction opposed to the mutual approach of the arm and the sole is obtained when approaching the state of maximum compression of the shock absorber spring by choosing a shock absorber spring with non-linear response, i.e. such that the compression force F or the reaction of the shock absorber spring corresponding to a depression e is not proportional to this e, but is bound to it by the aforementioned law.
- Damper springs meeting this law are known to a person skilled in the art, in an oleopneumatic embodiment, that is to say using a jack whose stiffness and non-linearity parameters can be adjusted. acting on an annex gas cylinder.
- Such jacks are also called “variable flexibility" or
- the reaction opposed by the shock absorber spring to an approximation of the shell relative to the sole, during skiing grows more than linearly as a function of the amplitude of the tilting of the arm around the tilting axis from a position of absence of stress on the shock-absorbing spring, that is to say that is to say also of the stroke of approximation of the shell relative to the sole from such a position, and this avoids "racket blows" without complicating or weighing down the apparatus.
- the arm must have the required mechanical resistance and, for this purpose, one can choose to make it in the form of two parallel beams, mutually integral, as in the case of the aforementioned known apparatus, but it is preferably produced in the form of a single beam, offering greater rigidity.
- this embodiment of the arm in the form of a single beam makes it possible to pass this arm between the skier's legs and to provide on either side of the arm two footpegs integral with it and located between the receiving shell of the skier's pelvis and the tilting axis, at a level lower than that of the arm, to receive the skier's feet and allow the latter to '' occupy a more compact position than with the currently known devices.
- the apparatus preferably comprises means for increasing the spacing between the receiving shell of the skier's pelvis and the sole, by voluntary action of the skier, when taking a chairlift.
- the articulation of the shock absorber spring on the arm or the sole, respectively is indirect and is effected by means of a link on which the shock absorber spring is articulated around the axis. of articulation respectively on the arm or the sole and which is itself articulated directly respectively on the arm or the sole around a pivot axis perpendicular to the mean planes and positioned so that:
- the pivot axis is offset with respect to the articulation axis respectively on the arm or the sole, with reference to the direction of sliding, and the link respectively runs along the arm or the sole and bears respectively against the arm or the sole at the level of the axis of articulation of the shock absorber spring respectively on the arm or the sole, so that the arm and the sole are in mutual support by means of the shock absorber spring,
- the hinge axis respectively on the arm or the sole is disposed approximately between the pivot axis and the hinge axis respectively on the sole or the arm, and the link is approximately aligned with the shock absorber spring, with toggle effect, so that the shock absorber spring and the link oppose a reconciliation of the arm and the sole.
- the other articulation of the shock absorber spring namely its articulation respectively on the sole or the arm, is preferably direct.
- the skier can thus easily cause the passage to the chairlift grip position, for example by taking support for this purpose on his poles; if necessary, elastic biasing means such as a spring biasing the rod in the direction of a passage to this position can facilitate this passage.
- the pivot axis is preferably offset backwards with respect to the articulation axis respectively on the arm or the sole, with reference to the direction of sliding, in the skiing position. This allows on the one hand to ensure that the return to the ski practice position takes place automatically under the effect of a thrust applied to the shock absorber spring and / or to the link by the seat of the chairlift when he undertakes under the arm, and on the other hand to free up as large a space as possible for receiving the seat of the chairlift under the shell for receiving the skier's pelvis, in particular when this shell is placed in cantilever towards the rear relative to the articulation of the shock absorber spring on the arm.
- the latter comprises locking means, unlockable at will by the skier, of the link in the skiing practice position, for example of a type ensuring automatic locking of the link when it reaches the ski practice position from its chairlift grip position.
- an apparatus according to the invention can be removably mounted on the ski, by locking the sole in the interface zone, in particular by means of the bindings traditionally used for securing the ski to the foot of a skier, but the sole of the apparatus according to the invention can also be formed directly by the interface zone of a ski, then permanently provided with means of articulation of the arm around the tilting axis and of the shock absorber spring, if appropriate. indirectly, around the respective axis of articulation.
- the present invention therefore relates not only to the above-mentioned apparatus as such, but also to such apparatus in combination with a ski, the interface zone of which either bears solidly or constitutes the sole.
- FIG. 1 shows a view of a paralyzed skier of the lower limbs, using apparatus according to the invention adapted to this type of disability.
- FIG. 2 shows this apparatus in lateral elevation and, in part, in section along a mean plane of symmetry, also constituting a mean plane of symmetry for skiing and identified in II-II in FIG. 3.
- Figure 3 shows a detail of Figure 2, in section through a plane perpendicular to the plane of symmetry and identified in III— III.
- FIG. 4 shows an alternative embodiment of the apparatus illustrated in Figure 2, in a side elevation view similar to that of this Figure 2.
- Figure 5 illustrates a detail of Figure 4, partly in section through the mean plane of symmetry common to the apparatus according to the invention and to the ski, in the case of a preferred embodiment.
- FIGS. 1 to 3 relating to a first embodiment of an apparatus 1 according to the invention, illustrated in FIG. 1 in the state mounted on a ski 2 and in use by a skier 3 paralyzed on both legs.
- the normal direction of sliding of the ski has been designated by 4 and by 5 a mean plane forming a plane of symmetry both for the ski 2 and for the apparatus 1.
- the direction 4 will also be considered horizontal and will serve as a reference to the concepts of front and rear, and the plane 5 will be considered as vertical, the apparatus according to the invention 1 being arranged above ski 2 as this is the case during its use; naturally, no limitation should be deduced therefrom to the orientation of the direction 4 and of the plane 5 during the practice of skiing.
- the ski 2 is of a standard type, usually used by a skier having the use of his legs, and has on its upper face 6 a zone 7 of determined position, constituting the interface zone between the ski 2 and the skier as well when the latter has the use of his legs as when the latter, paralyzed or amputated legs, uses an apparatus according to the invention to practice skiing.
- the upper face 6 of the ski 2 has front 8 and rear 9 bindings, of known type, not detailed, intended to wedge respectively the front and the rear of the foot of a skier having the 'use of his legs for the practice of alpine skiing, and for mounting the apparatus according to the invention 1 in the case of a skier 3 disabled legs.
- this apparatus comprises a rigid sole 10, superimposed on the upper face 6 of the ski 2 over a part of its length, measured parallel to the direction 4, and bearing in an integral manner, projecting downwards, that is to say towards the upper face 6 of the ski 2, two parts 1 1, 12 for mounting on a ski, respectively anterior and posterior and having respectively forward and backward a flange 13, 14 of which the shape reproduces respectively the front part or the rear part of the shape of a ski boot sole to engage respectively with the front binding 8 or with the rear binding 9.
- the parts 11, 12 have a face downwards respective plane 15, 16, the two faces 15 and 16 being mutually coplanar and resting on the upper face 10 of the ski 2 in the interface zone 7 when the parts 11, 12 cooperate respectively with the front binding 8 and with the binding. on posterior 9.
- the sole 10 could be directly integrated into the ski 6, in zone 7, in which case the apparatus according to the invention 1 would be inextricably linked to ski 2.
- the sole 10 has for example the shape of a rectilinear tube, arranged in the direction 4 and having perpendicularly thereto a square cross section so as to carry the parts 11 and 12 by a flat horizontal face 17 which is parallel to the faces 15 and 16 of the parts 11 and 12, and upwards an upper face 18 also flat, parallel to the face 17, except possibly in a rear end zone 19 of the cross member 10; in this rear end zone 19, which carries the part 12, as illustrated the cross member 10 is in fact refined towards the rear in the nonlimiting example illustrated.
- the sole 10 continues beyond the part 11, above the front binding 8, to a front end region 20 located between the front binding 8 and the tip 70 of the ski.
- the sole 10 forms an elbow so as to present a rigid appendage 21 which, from the anterior end zone 20, is ascending towards the front, forming with respect to the vertical a angle not referenced of the order of 30 °, this figure being given by way of nonlimiting example.
- the appendage 21 extends forwards and upwards to an upper end zone 22 in which two cheeks 23, 24 joined integrally to it, for example by welding, in mutually symmetrical positions by relative to plane 5, have a respective bore 25, 26 along the same axis 27 perpendicular to plane 5 and constituting a tilting axis, thus placed in front of the interface zone 7 but behind the spatula 70.
- the two bores 25 and 26 receive coaxially the same pin 28 which, between the cheeks 23, 24, receives and guides, in rotation about the axis 27 relative to the appendage 21 of the sole 10, a anterior end zone 29 of a straight arm 30 which extends rearward from the axis 27, up to a rear free end zone 31 which itself is integral, upwards , a shell 32 for receiving and immobilizing, by strapping, the skier's pelvis 3.
- the arm 30 has the shape of a single tubular beam, rectilinear and of square section, around the tilting axis 27 as on most of its dimension, towards the rear, from this axis 27.
- the arm 30 is ascending towards the rear in all the configurations of the apparatus 1, at least under normal conditions of use thereof, up to an upper zone 33 located approximately vertical to the anterior part 11, and it is connected at the level of this upper zone 33, integrally, to an appendage 34 also straight and rigid, descending towards the rear from the upper zone 33 to the end zone free 31 whatever the configuration of the apparatus 1 under normal conditions of use.
- This free end zone 31, constituting the rear end of the arm 30, is itself located approximately vertical to the zone 35 of the sole 10 located between the parts 11 and 12, that is to say of the interface zone 7, with reference to the direction 4, as well as approximately vertical to the center of gravity G of the seated skier and strapped in the shell 32, fixed on the appendix 34 so that the thighs of the skier can be considered as resting flat on the latter via the shell 32, while the skier's calves hang approximately vertically, respectively on either side of the arm 30 between the end zone 29 thereof and its upper zone 33, so that the skier's feet are at a level close to that of the upper face 18 of the sole 10, in a zone of this upper face 18 close to the zone 20 of the sole 10, and rests in the immediate vicinity of this zone 20 on toe clips 36 which the arm 30 carries in an integral manner, in positions which are mutually symmetrical with respect to the plane 5.
- the toe clips 36 are bolted to the arm 30, as shown schematically in 37, near the front end region 29 of this arm 30, that is to say of the axis 27, several orifices or groups of bolt orifices 38 being provided in a distributed manner along the arm 30 to allow the best choice of the positioning of the toe clips 36 according to the morphology of the skier 3.
- the apparatus according to the invention 1 is dimensioned in relation to the respective positions of its various components or component parts which have just been described.
- the tilting axis 27 is offset by approximately 70 cm forwards relative to the plane 39 and by approximately 35 cm upwards with respect to the common plane, not referenced, of the lower faces 15 and 16 of the parts 11 and 12, that is to say of the upper face 6 of the ski, the upper zone 33 of the arm 30 peaks at approximately 60 cm from this plane, and about 25 cm in front of the plane 39, and the free end zone 31 is located approximately along the plane 39, about forty centimeters above the plane of the lower faces 15 and 16 of the parts 1 1 and 12 and of the upper face 6 of the ski 2.
- the shock absorber spring 30 is of the rectilinear type, having an axis 41 which is situated in the plane 5 and along which it is telescopic, under the effect of a compression force F according to this axis 31, at least approximately along the relation: F-_a
- shock absorber springs 40 respecting this relationship, namely oleopneumatic shock absorber springs called "stiffness" variable "or” with variable flexibility ", comprising a body 42 forming a cylinder with axis 41 and a rod 43 also of axis 41, forming a piston inside the cylinder defined by body 42, in a manner not illustrated in the detail but known to a person skilled in the art
- the shock absorber spring 40 thus formed is articulated respectively on the sole 10 and the arm 30 about an axis of riculation 44, 45 intersecting the axis 41 at right angles , perpendicular to pi.
- the axis 45 of articulation on the arm is offset towards the front relative to the free rear end zone 31 of the arm 30 and to the shell 32 which, in this way, is cantilevered towards the rear relative to the articulation of the shock absorber spring 40 on the arm 30; this results in a leverage effect with reference to the pivot axis 27.
- it is the body 42 which is articulated around the axis 44 on the sole 10 and the rod 43 which is articulated around the axis 45 on the arm 30, but it would not go beyond the scope of the present invention by reversing this assembly.
- the articulation of the rod 43 on the arm around the axis 45 is direct, in the sense that it takes place on a yoke 46 fixed under the arm 30, at the connection of the appendage 34, immediately in below the upper area 33.
- the articulation of the body 42 around the axis 44 on the sole 10 is indirect, in the sense that the body 42 is articulated around the articulation axis 44 on a rectilinear link 47 which, in a position skiing practice illustrated in Figure 2, lies flat on the upper face 18 of the sole 10 extending rearward from the axis 44 to an axis 48 for mounting the link 47 to the pivoting on the upper face 18 of the sole 10 which defines, for example, this axis 48 by a suitably bored lug 49, fixedly attached to the upper face 18 of the sole 10, above the latter.
- the arm 30 is supported on the sole 10 by means of the shock absorber spring 40, which elastically opposes their relative tilting around the tilting axis 27, in the sense of mutual ratment.
- the pivot axis 48 is placed approximately vertical to the axis 45, under the latter, so that the axis 44 is offset towards the front with respect to the vertical of the axis 45, and that the axis 41 of the shock absorber spring 40 is ascending towards the rear, from the axis articulation 44 to the articulation axis 45.
- the articulation axis 44 is closer to the tilting axis 27 than the articulation axis 45, and these three axes occupy relative positions such that the ratio sin ⁇ 2 is approximately equal to 1, where ai and ⁇ 2 sin ⁇ i denote the values of the angle ⁇ of the dihedron than a plane 50 including the axis of articulation 45 and the tilting axis 27 and ascending towards the rear in normal conditions of ski practice and a plane passing through the two articulation axes 44 and 45, the trace of which merges with the axis 41 in FIG.
- the positioning, for this purpose, of the articulation axes 44 and 45 relative to the tilting axis 27 is within the normal aptitudes of a person skilled in the art and, preferably, this positioning is such that: 0.90 s sin ⁇ ? -if. 10 sin cq or, more preferably: 0.95 ⁇ sin -? ⁇ 1, 05 sin i
- these figures should only be considered as non-limiting examples, and we can deviate slightly without departing from the scope of the present invention.
- the indirect articulation of the shock absorber spring 40 around the axis of articulation 44 relative to the sole 10 allows, when taking a chairlift, to authorize a separation of the shell 32 for receiving the skier's pelvis 3 and sole 10 higher than that which the single shock-absorbing spring 40, for example if it was articulated directly on the sole 10 around the axis 44 in the same way as around the axis 45 on the arm 30.
- the skier 3 taking for this purpose support on the ground by means of his stabilizing sticks, lifts the shell 32 and the arm 30 while the ski 2 tends to remain on the ground by gravity, and causes the passage of the assembly formed by the damping spring 40 and the rod 47 to a position illustrated in phantom in Figure 2, in which the axis 44 is located approximately between the axes 48 and 45, slightly behind a plane including them in order to create a toggle effect, the link 47 being practically aligned with the shock absorber spring 40; the shell 32 is then further apart from the sole 10, upwards, than during skiing, during which the rod 47 remains applied to the upper face 18 of the sole 10.
- This chair lift grip position constitutes a stable state in which the arm rests on the sole via the assembly formed by the shock absorber spring 40 and the link 47, but an impulse given to the shock absorber spring and / or to the link 47, towards the before, by the seat of the chairlift when it engages from back to front under appendix 34, is enough to pass the axis 44 in front of the plane of the axes 48 and 45 and to tilt the shock absorber spring 40 and the link 47 back to their skiing position.
- FIGS. 4 and 5 the components or component parts described with reference to FIGS. 2 and 3 are found identically and under the same numerical references, except that the orientation of the axis 41 of the spring - shock absorber 40 has been reversed, this axis 41 now being ascending towards the front during skiing, and that:
- the body 42 of the shock absorber spring 40 is now articulated directly, about an articulation axis 144 perpendicular to the mean plane 5, not shown, on the sole 10, namely more precisely on a yoke 146 integral with this sole 10 and forming a projection above its upper face 18, and
- the rod 43 of the shock absorber spring 40 is articulated directly, around an articulation axis 145 also perpendicular to the mean plane of symmetry not shown, on one end of a rectilinear rod 147, for its part directly articulated, to its other end, on the appendage 34 of the upper arm 30, about a pivot axis 148 for example materialized by an ear 149 fixed to the appendage 34, under the latter, and suitably bored.
- the articulation axis 145 is placed in front of the pivot axis 148, and closer to the tilt axis 27 than the articulation axis 144 , it being understood that the two articulation axes 144, 145 are offset towards the rear relative to the tilting axis 27 and situated at a level respectively lower or higher than that of this axis 27.
- the arm 30 is supported downward, between the tilting axis 27 and its upper zone 33, on the rod 147, at the articulation thereof on the rod 43 of the shock absorber spring 40, that is to say on this shock absorber spring 40 itself as the arm 30 can thus request compression along its axis 41, and the rod 147 runs approximately horizontally along the arm 30, below the latter, between its articulation on the rod 43 of the shock absorber spring 40 and its articulation on the ear 149, under the upper zone 33; the articulation axis 144 and the pivot axis 148 are then placed behind the vertical of this upper zone 33, while the articulation axis 145 is placed in front of this vertical.
- the respective positions of the axes 144 and 145 with respect to the axis 7 are such that the aforementioned relationship between the limit values ⁇ i and ⁇ 2 of the angle ⁇ is verified as the axis 41 of the shock absorber spring 40, intersecting at right angles to the articulation axes 144 and 145, or an unreferenced plane passing through these two articulation axes 144, 145, forms with respect to a plane 150 passing through the articulation axis 145, here indirect, of the shock absorber spring 40 on the arm 30 and the tilting axis 27 of the latter relative to the sole 10.
- the indirect articulation of the shock absorber spring 40 on the arm 30 also allows the latter to pivot, in the direction of a distance from the free end zone 31 and from the shell 32 relative to the sole 10, to a chairlift grip position, not shown, in which the rod 147 is placed approximately in the extension of the shock absorber spring 40 , along the axis 41 thereof, the hinge pin 145 being placed approximately between the hinge axis 144 and the pivot axis 148, slightly behind a plane including the latter in order to create a kneepad effect; the shock absorber spring 40 and / or the link rod 47 are advantageously elastically stressed, for example by a spring acting between the link rod 47 and the arm 30 around the axis 148, towards this chair lift grip position, it being understood that this stress is low enough for the skiing position to be stable and can only be left by voluntary action by the skier.
- locking means unlockable in a controlled manner, of the link 147 in its position corresponding to the ski practice position.
- These means 52 comprise in the example illustrated a toothed sector
- the attachment of the wheel 53 with the rod 147, to rotation about the axis 148, is effected by means
- these means 54 authorizing an adjustment of their relative angular position around the axis 148; these means 54 have for example the shape of a strut
- the link 147 is thus locked automatically in the ski practice position; it can also be locked automatically in several intermediate positions between the grip position of a chairlift and the skiing practice position, against a return to the grip position of a chairlift, during its automatic passage in the skiing position under the impulse of the chair lift seat.
- a command for example by Bowden cable 66, made available to the skier, allows the latter to apply, when it so desires, to the pawl 60, traction in the direction of a distance from the axis 148, with elastic compression of the spring 62, to disengage the pawl 60 from the teeth 63 and thus authorize the passage of the spring-shock absorber assembly 40 - rod 147 to the grip position of a chairlift.
- the spring 62 causes the pawl 60 to return to its engagement position with the teeth 63 so that, in particular when the seat of the chairlift enters under the arm 30 and comes to bias the shock absorber spring 40 and / or the rod 47 forward, the latter can freely and automatically return to their skiing position; the pawl 60 ensures locking of the rod 147 in the orientations which follow one another during this passage, and finally in the skiing practice position.
- the possibility of temporarily removing the shell 32 from the sole 10 of the apparatus according to the invention 1 when taking a chairlift is particularly advantageous when, as illustrated in FIGS. 1 to 5, the apparatus according to the invention 1 is intended to be used by a skier having his legs, the skier then being seated in a tilted back position, dictating the presence of the appendage 34 forming a bend with respect to the rest of the arm 30 and bringing the free end zone 31 of this arm 30, in fact defined by this appendage 34, relatively close to the face 18 of the sole 10 in the ski practice position.
- the arm 230 can move between an ascending limit orientation towards the rear from the axis 27, illustrated in phantom in Figure 6 and corresponding to an absence of stress, in particular by the weight of a skier, an orientation illustrated in solid lines in FIG. 6, less ascending towards the rear and corresponding to a static equilibrium under the effect of the weight of the skier but without dynamic stress, and a limit orientation inclined towards the rear from axis 127, also indicated in phantom in Figure 6 and corresponding to maximum dynamic stress.
- a person skilled in the art will readily understand that the position occupied when taking a chairlift is the position of static equilibrium without dynamic stress, which gives full access, for the chairlift, from the rear of the apparatus 1, under the shell 232.
- a shock absorber spring 40 identical to those which have been described with reference to FIGS. 1 to 5 elastically opposes the passage of the arm 230, by tilting around the axis 27 relative to the sole 10, of his no-load orientation at its maximum dynamic load orientation.
- the shock absorber spring 40 is articulated directly, respectively by its body 42 and its rod 43, on the sole 10 around an axis of articulation 244 and on the arm 230 around an axis of articulation 245, these two axes 244 and 245 being perpendicular to the mean plane of symmetry not illustrated and offset backwards relative to the tilt axis 27.
- the hinge axis 245 are differently spaced from the pivot axis 27, the hinge axis 245 of which is more distant than the hinge axis 244 in the example illustrated, the axis 41 of the shock absorber spring 40 being ascending towards the 'rear, but it is understood that it would not depart from the scope of the present invention by arranging the hinge pin 244 further from the pivot axis 27 than the hinge pin 245, and making so that the axis 41 of the shock absorber spring 40 is ascending towards the front.
- the relative positioning of the articulation axes 244 and 245 of the tilting axis 27 is such that, in this case also, the abovementioned relationship between the respective sines of the limit values ⁇ ⁇ , ⁇ 2 of the angle is respected. that forms, with a plane 250 passing through the articulation axis 245 and the tilting axis 247 and moreover constituting in this example a mean plane of the arm 230, the axis 41 of the shock absorber spring 40, intersecting at right angle of the articulation axes 244 and 245, or an unreferenced plane passing through these two axes and the trace of which on the unreferenced mean plane merges with axis 41.
- an apparatus 1 according to the invention can be inextricably linked to a ski.
- the sole 10 into the ski and appropriately connecting the tilting axis 27 and the axis 44, 144, 244 of articulation of the shock-absorbing spring 40 to the ski, then considered as constituting the sole 10, it being understood that it is then necessary to keep the same position of the vertical of the center of gravity G of the skier with respect to the ski, namely a positioning identical to that which this vertical would have in the case of a ski intended for the skier having the use of his legs and having for this purpose an area 7 of interface with the skier.
Landscapes
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9315015 | 1993-12-14 | ||
FR9315015A FR2713496B1 (fr) | 1993-12-14 | 1993-12-14 | Appareillage permettant la pratique du ski alpin à un skieur handicapé des jambes, et ski équipé d'un tel appareillage. |
PCT/FR1994/001459 WO1995016504A1 (fr) | 1993-12-14 | 1994-12-13 | Appareillage permettant la pratique du ski alpin a un skieur handicape des jambes |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0734278A1 true EP0734278A1 (fr) | 1996-10-02 |
Family
ID=9453917
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95903831A Withdrawn EP0734278A1 (fr) | 1993-12-14 | 1994-12-13 | Appareillage permettant la pratique du ski alpin a un skieur handicape des jambes |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0734278A1 (fr) |
JP (1) | JPH09510366A (fr) |
CA (1) | CA2178920A1 (fr) |
FR (1) | FR2713496B1 (fr) |
WO (1) | WO1995016504A1 (fr) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2741579B1 (fr) * | 1995-11-24 | 1997-12-19 | Tessier Pierre Daniel Jean | Dispositif a skis pour le transport de personnes, notamment de personnes handicapees |
FR2770142B1 (fr) * | 1997-10-23 | 1999-12-31 | Pierre Daniel Jean Tessier | Dispositif de fauteuil a skis, notamment pour un skieur handicape des jambes |
GB2340739A (en) * | 1998-07-21 | 2000-03-01 | Nicholas Robert John Matthew | seat for a water ski |
FR2798072B1 (fr) * | 1999-09-07 | 2001-11-16 | Jean Claude Bibollet | Perfectionnement pour vehicule glissant sur neige |
FR2813021B1 (fr) | 2000-08-18 | 2002-12-06 | Pierre Tessier | Mecanisme de suspension et de relevage d'un relevage d'un dispositif de fauteuil a ski pour un skieur handicape |
FR2847172B1 (fr) * | 2002-11-18 | 2004-12-24 | Alain Jean Marie Viricel | Appareil permettant a une personne handicapee de faire du ski alpin ou de fond dans une position debout |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2572350B1 (fr) * | 1984-10-31 | 1989-06-09 | Christmann Jean | Vehicule pour evoluer sur neige, notamment destine aux handicapes |
FR2611515A1 (fr) * | 1986-12-05 | 1988-09-09 | Saint Martin Patrick | Dispositif permettant la pratique du ski en position assise sur monoski |
NL8802623A (nl) * | 1988-10-25 | 1990-05-16 | Maarten Antoon Nicolaas Den Ha | Voortbewegingsmiddel. |
-
1993
- 1993-12-14 FR FR9315015A patent/FR2713496B1/fr not_active Expired - Fee Related
-
1994
- 1994-12-13 EP EP95903831A patent/EP0734278A1/fr not_active Withdrawn
- 1994-12-13 JP JP7516567A patent/JPH09510366A/ja active Pending
- 1994-12-13 CA CA002178920A patent/CA2178920A1/fr not_active Abandoned
- 1994-12-13 WO PCT/FR1994/001459 patent/WO1995016504A1/fr not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
CRASE N.: "Winter Heat", SPORTS'N SPOKES, pages 8 - 13 * |
Also Published As
Publication number | Publication date |
---|---|
FR2713496A1 (fr) | 1995-06-16 |
WO1995016504A1 (fr) | 1995-06-22 |
FR2713496B1 (fr) | 1996-03-01 |
CA2178920A1 (fr) | 1995-06-22 |
JPH09510366A (ja) | 1997-10-21 |
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