EP2231289A1

EP2231289A1 - All-terrain roller skate

Info

Publication number: EP2231289A1
Application number: EP08875632A
Authority: EP
Inventors: Jean-Claude Arbogast
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-12-04
Filing date: 2008-12-03
Publication date: 2010-09-29
Also published as: US8297656B2; FR2924356A1; RU2010127269A; CA2707375A1; US20100253057A1; FR2924356B1; WO2009101284A1; JP2011505214A; CN101888883A

Abstract

In-line roller skate (1) comprising in-line wheels (2) around which travels an endless rolling support (4) of the belt type, having regular transverse notches (40). At least the rear wheel (24) is mounted in such a way as to allow horizontal sliding, and at least the front wheel (9) is mounted in such a way as to allow inclined forward sliding along an elongate slot opening (12) formed in the side walls (13, 14) of the frame (6), so that the tension in the rolling belt keeps the axis of rotation (5) of the wheel at the bottom end of the slot. At least one element (27) is in rolling bearing contact with the lower portion of the rolling belt. This belt is preferably cylindrical in section, with its inner surface (28) housed in mating grooves (3) around the perimeter of the wheels. The skate may include a stone guard (45).

Description

Roller skate all terrain.

The present invention relates to an improved roller skate type in-line and off-road. More particularly, the invention relates to an in-line roller skate comprising a belt mounted to roll on the wheels of the pad.

Nowadays, roller skates in line, usually called "rollers", do not allow to roll satisfactorily on a soft, uneven or congested ground, for example by chippings. Indeed, the presence of a small obstacle, such as a small pebble, between the wheels of the pad can block them and cause the fall of the user. In addition, although various solutions consisting of incorporating a damping system between the shoe part and the caster fixing block or the casters themselves have been envisaged, these solutions have proved unsatisfactory, and the roller skates can not not be used on rough, rough, rough and uncomfortable floors. Finally, the casters of the conventional roller skates in line tend to sink into the soft ground, which makes their use quite difficult, especially on clay floors or the like.

A greater running comfort than the initial in-line roller skates was obtained by not making them roll directly on the outer circumference of the rollers but on an endless rolling support mounted to roll on the rollers of the skate. Indeed, with this type of pads, the bearing surface of roller skates on the ground is greater and the user feels less uneven ground when rolling.

The object of the present invention is to provide an in-line roller skate with an endless rolling support mounted to roll on the wheels of the pad which is particularly well suited to driving on a soft, uneven or crowded and has the best possible comfort.

To solve this technical problem, various devices have been proposed.

By PCT application No. WO 98/11961 in the name of RUSS, there is known for example an in-line roller skate with an endless belt mounted to roll on the wheels of the shoe in the manner of a crawler. This endless belt has an outer surface of flat rolling and a sufficient width to mitigate shocks caused by the presence of small obstacles or imperfections of the ground. Nevertheless, even if the user feels less unevenness of the ground when rolling, the flat shape of the outer surface of the tread considerably increases the friction surface between the endless belt and the ground, which results in a speed lessened and premature fatigue of the user. In addition, a tread according to the RUSS application only allows horizontal use of roller skates, which is restrictive and very uncomfortable in practice and does not allow all skating techniques. Another solution is disclosed in the PCT application No. WO 94/27693 in the name of FREILICH wherein an inline roller skate has an endless belt mounted to roll on the wheels of the shoe in the manner of a crawler, this band consisting of several elements articulated to each other to form a closed loop. These hinged members are adapted to engage each other when in the lower loop portion to form an arc defining an arcuate bearing surface. However, in addition to being particularly expensive, the tread of the FREILICH application tends to capture chippings or other small debris between the articulated elements in the front loop portion where the distal parts of the articulated elements are moving away. each other. These chippings or other so captured not only prevent the articulated elements form the arched airfoil, but also risk to block and seriously deteriorate the tread. Finally, in use, the rolling on a tread made of several articulated elements has proved uncomfortable and noisy, the user feeling many vibrations, even jerks, even on flat and smooth, caused by the articulated elements themselves.

Nevertheless, the current roller skates, even if they are of the in-line type endless support rolling, do not provide sufficient comfort for example to move on gravel, grass, or any other terrain usually difficult. To solve this technical problem, the in-line roller skate with endless belt-type running support according to the invention comprises numerous improvements which can be used jointly or independently in order to considerably improve driving comfort.

These improvements include the following main ones:. a suspension effect mounting at least for the axis of rotation of the front wheel, for damping the inequalities of the ground,. a sliding arrangement at least for the axis of rotation of the rear wheel, allowing the tension of the endless support of rolling,

. the provision of at least one rolling support element on the inner face of the lower portion of the endless rolling support, which facilitates the passage of the endless rolling support between the rollers and to keep it on a trajectory straight,

. an outer surface of semicircular section for the endless support of rolling, which provides ease in turns and considerably reduces the friction surface between the endless rolling support and the ground,

. an inner surface having a semicircular, trapezoidal, triangular, square or other cross-section for the endless support for rolling, which makes it possible to improve the maintenance of the endless support for rolling in the grooves of the rollers, a rear structure cut into regular transverse notches, on the internal face of the endless belt-type running support, which allows easier deformation of the endless rolling support on the end rollers, providing a rolling and a return movement easier, faster and much quieter endless rolling support, and

. anti-pebble protection provided at the front of the roller skate, for protecting the moving parts of the roller skate against gravel and the like.

Other features and advantages of the invention will appear on reading the detailed description which follows, description made with reference to the accompanying drawings, in which:

. Figure 1 is an overall profile of an in-line roller skate with various improvements according to the invention;

. FIG. 2 is a view similar to that of FIG. 1 but in which, for the sake of clarity, certain elements have been omitted while others are represented in phantom;

. Figure 3 is a cross-sectional view of a roller skate at a front wheel whose axis of rotation is slidably mounted in a suspension slit according to the invention;

. FIG. 4 is a detailed side view of the front portion of the frame on which the casters are mounted according to a variant of the invention comprising means for adjusting the inclination of the suspension effect for the axis of rotation; the front wheel;

. Figure 5 is a front view corresponding to Figure 4; . Figure 6 is a side view of a pivoting adjusting disc constituting the means for adjusting the inclination of the travel of the axis of rotation of the front wheel; . Figure 7 is a front view corresponding to Figure 6;

. FIG. 8 is a detailed profile view in which the various elements represented in FIGS. 4 and 6 are assembled; Figure 9 is a front view corresponding to Figure 8; Figure 10 is a cross-sectional view of a roller skate at a smooth support roller on the inner face of the lower portion of the endless rolling support according to the invention; FIGS. 11 to 15 are detailed cross-sectional views between two successive rollers of a roller skate according to the invention in which the inner surface of the endless belt-type rolling support has sections of different shapes and in which the wheels have a groove of different shapes; FIGS. 16 to 20 are views similar to FIGS. 11 to 15 but in which the outer surface of the endless belt-type running support has a section of semicircular shape which is wider than that of the inner surface so as to present a ledge bearing on the periphery of the side faces of the rollers; FIG. 21 is a detailed side view of a pair of lateral guides according to a variant of the invention comprising a means preventing the endless support from rolling out of its rolling guide; Fig. 22 is a cross-sectional view corresponding to Fig. 21; Figure 23 is a detail side view of a lateral guide according to another embodiment of the invention comprising a means for holding and guiding the rolling end support rolling; Fig. 24 is a cross-sectional view corresponding to Fig. 23; Figure 25 is a detailed side view of a lateral guide according to a variant of the invention comprising a means for holding and guiding the rolling end support rolling; Fig. 26 is a cross-sectional view corresponding to Fig. 25; Figure 27 is a side view of a pad according to the invention comprising two sets of two aligned wheels mounted one after the other; Figure 28 is a side view of a pad according to the invention comprising two sets of two wheels mounted parallel to either side of the sole of a shoe shoe; Fig. 29 is a front view corresponding to Fig. 28; Figure 30 is a detailed side view of the front portion of a pad according to the invention having an anti-peel protection; and FIG. 31 is a detail view from above of the front portion of a skate having the anti-peel protection of Figure 30.

The roller skate according to the present invention will now be described in detail with reference to Figures 1 to 31. The equivalent elements shown in the different figures will bear the same reference numerals. In the rest of this description we shall define the notions of high and low, of inferior and superior, etc. according to the orientation adopted by the device shown in the various figures. It is obvious that this orientation will not necessarily be kept in use.

The forward movement direction of a shoe according to the invention is shown in some figures by a white arrow.

The figures are given by way of example only and should not be interpreted restrictively. For the sake of simplicity, most of the figures, especially Figure 1, show a roller skate according to a preferred embodiment of the invention and simultaneously comprising a large number of improvements. However, it should be understood that a roller skate according to the invention does not necessarily include all the improvements of the invention, but may be limited to the basic version or include any number. Likewise, the number of elements, such as, for example, the wheels, the shape of the means and their positions, must not be interpreted restrictively. As represented in FIG. 1, in general terms, the invention relates to an improved in-line wheel type 1 all-terrain skate comprising a series of rollers 2, for example with grooves 3, mounted in alignment and on which is rolled an endless rolling support 4 of the belt type. An in-line roller skate 1 generally comprises two to six wheels 2, more particularly four or five, mounted in alignment, each rotating about an axis 5 mounted on a frame 6. The frame 6 on which the rotation axes are mounted 5 wheels is itself mounted removable or fixed on the sole 7 of a shoe 8 for pad.

The main improvement corresponding to one of the essential means of the invention consists in mounting the axis of rotation 5 of at least the front wheel 9 movable in operation in a linear stroke along an axis 10 preferably slightly inclined relative to the vertical 11 for example along an elongated slot opening 12 formed in the side walls 13, 14 of the frame 6 on which are mounted the rotation axes 5 of the rollers.

A front wheel 9 whose rotational axis 5 is displaceably mounted is shown in section in FIG.

Under the weight of the user, when the pad 1 passes on a floor 15 uneven or a small obstacle, the displacement of the axis of rotation 5 of the wheel 2, 9 by sinking upwards, has a damping effect which reduces the shock, as shown by a black arrow in Figure 2 .

The slot 12 formed in the side walls 13, 14 of the frame 6 on which the rollers are mounted is preferably inclined forwardly at a fixed or modifiable angle for modifying in an adjustable manner the direction of movement of the front wheel 9 and the damping force according to the weight of the user or the nature of the soil on which he rolls. Indeed, a slot 12 with axis 10 close to the vertical 11 allows a poorly damped rise of the front wheel 9, particularly suitable for low weight users or a very uneven ground, while a slot 12 axis 10 inclined or more inclined provides a recovery more damped and therefore difficult thereof, particularly suitable for users of high weight or a perfectly smooth floor.

The travel of the axis of rotation 5 of at least the front wheel 9 moving in the slot 12 formed in the side walls of the chassis is preferably inclined forwardly. In this case, the return to position of the axis of rotation 5 of the roller 2, 9 is done by means of the kinematic connection provided by the endless rolling support of the belt type 4. In fact, the latter 4 is preferably mounted tensioned on the rollers 2 of the pad and therefore it constrains the axis of rotation 5 of the roller 2, 9 downwards in the slot 12 formed in the side walls 13, 14 of the frame 6.

When the axis of rotation 5 of the front caster 9 mounted to slide back into the slot 12 formed in the side walls 13, 14 of the frame 6, the shape of the perimeter affected by the endless rolling support 4 is temporarily changed, for example by spatial deformation or by elastic elongation, then returns to its initial equilibrium conformation. It will be noted that according to the spatial configuration of the rollers 2, represented in particular in FIGS. 1 and 2, the endless rolling support 4 can provide all or part of the restoring force necessary for the suspension effect by simple spatial deformation of its perimeter, without necessarily being made of an elastic material.

Thus, the axis of rotation 5 of the front wheel 9 can be mounted with suspension effect without the need to use another means for obtaining an elastic return, such as by springs or the like.

However, according to another variant of the invention, especially when the slot 12 formed in the side walls 13, 14 of the frame 6 on which the rollers 2 are mounted is inclined towards the rear (not shown), it is possible to providing an elastic return force, for example in the form of springs or the like, to recall the axis of rotation of at least one wheel 2, preferably the front wheel 9, in the lower position in the slot 12 formed in the walls However, this solution is less advantageous because it is more fragile and more expensive.

Figures 4 to 9 detail a variant according to which the angle of inclination of the slot 12 can be adjusted. According to this variant, the damping device of the front wheel 9 comprises a pivoting adjusting disk 16 with adjustable inclination and having a slot 17 provided for the passage of the axis of rotation 5 of the roller 2, 9 slidably mounted on along this slot, this axis 5 also passing through an enlarged opening 12, 18 formed in the side walls 13, 14 of the frame 6 on which the rollers 2 are mounted. This pivoting adjustment disk 16 also has lights 19 in the form of an arc. circle for guiding and tightening screw 20 serving as a guide to the pivoting movement. In this variant, the enlarged opening 12, 18 made in the side walls 13, 14 of the frame 6 is provided for the passage and the displacement of the axis of rotation 5 of the front wheel 9 at different angles of inclination 10 provided The chassis 6 on which the rollers 2 are mounted also has threaded bores 21 for the passage of the previous guide and clamping screws 20. During adjustment, the guide and clamping screws 20 are loosened so that the user can orient the pivoting adjustment disk 16 according to the chosen inclination. This orientation is made by a pivoting of the disc 16 pivoting which is guided by the sliding of the arcuate lights 19 of the body of the disc 16 on the screws 20 for guiding and tightening. Once the inclination has been chosen, the tightening of the guiding and tightening screws 20 makes it possible to immobilize in position the pivoting adjusting disk 16. The displacement of the axis of rotation 5 of the wheel 2, 9 during the dampings will be then according to the angle of inclination thus fixed.

This angle of inclination relative to the vertical 11, for example forward, is between 0 and 45 °, preferably between 8 and 35 °. This angle will preferably be between 8 and 10 ° for children and approximately equal to 25 ° for adults.

According to a preferred variant of the invention, the angle of inclination can be indexed for example by means of graduations 22 located on the pivoting adjustment disc 16 to which corresponds a mark 23 provided on the frame 6 on which are mounted the rollers 2 Or vice versa. The adjustable nature of this damping device is particularly advantageous in that the damping device can be standard and therefore produced at low cost for all types of roller skates, and for all sizes. Although according to a preferred embodiment of the invention only the axis of rotation 5 of the front wheel 9 is slidably mounted, it is also possible to provide such a suspension effect for other wheels 2 of the shoe 1, for example by means of springs or the like (not shown).

A second improvement corresponding to a second original feature of the invention consists in mounting the rotation axis 5 of the rear wheel 24 in substantially horizontal sliding in a substantially horizontal straight slot 25, as shown in FIG. indexing the position of the axis of rotation 5 in the substantially horizontal rectilinear slot 25 allows adjustment of the tension of the endless rolling support 4 around the rollers 2, 9, 24. This indexing is performed by means of a fast mechanism, practical and inexpensive, for example in known manner by means of an eccentric 26 bearing on the axis of rotation

5 of the rear wheel 24 as shown in Figure 1.

This mechanism 26 for adjusting the tension of the endless rolling support 4 by the rear wheel 24 serves to adjust the tension of the endless belt-type running support 4 and to set up the endless rolling support 4 or replacing it.

It is advantageously provided for the rear wheel 24, but could also be adapted to the front wheel 9.

Another improvement consists in adding at least one, preferably several, intermediary rolling support elements 27 on the lower part of the shoe 1 between the rolling rollers 2, bearing against the inner face 28 of the endless rolling support 4 , in a way to :

. improve the maintenance and passage of the endless rolling support 4 between the rollers 2 by an intermediate guide; . to obtain a greater length of support of the endless rolling support 4 with the ground 15 by pushing it downwards in its lower inclined portions 29; and

. maintain the endless rolling support 4 on a rectilinear trajectory to prevent it from being deformed, for example undulatingly, following a rugged terrain. These rolling support elements 27 are preferably in the form of rollers 30 or cylindrical rollers, smooth or grooved, for example size less than that of the rollers 2. Their outer face 31 or their groove each time bears on the endless rolling support 4. These rolling support elements 27 are each located between two successive rollers 2.

The groove of each grooved roller constituting a rolling support element 27 is preferably of the same profile shape as that of the rollers 2.

In FIG. 1, bearing elements 27 are shown in the form of two smooth rollers, whereas in FIG. 2, these smooth rollers are four in number. A smooth roller 30 according to a preferred embodiment of the invention is shown in section in FIG. 10. Advantageously, the vertical position of these additional support rollers 27 can be adjustable, for example by means of adjustment screws 32.

Just like the rollers 2, it is also possible to mount the axis of rotation of these support elements 27 suspended along the slots.

Yet another improvement consists in providing front wheels 9 and rear 24 substantially smaller than the other wheels 2, the upper part of all of these wheels 2, 9, 24 being located substantially in the same horizontal plane. Thus, as shown more clearly in FIG. 2, the perimeter formed by the endless rolling support 4 has a generally trapezoidal spatial pattern or configuration, with a longer upper side than the lower side in contact with the the ground 15, and these two parts being substantially rectilinear and parallel. This conformation allows a certain flexibility in the maintenance of the endless rolling support 4 in its upper part and also allows a spatial deformation of the perimeter that it forms as a whole.

When the axis of rotation 5 of a roller 2, 9 slidably mounted back into the slot 12 formed in the side walls 13, 14 of the frame 6, the overall layout of the perimeter formed by the endless rolling support 4 deforms temporarily, for example by spatial deformation or by elastic elongation, then returns to its initial equilibrium conformation. It will be noted that according to the spatial configuration of the rollers 2, represented in particular in FIGS. 1 and 2, the endless rolling support 4 can provide the restoring force necessary for the suspension effect by simple spatial deformation of its perimeter, without the need for it is necessarily made of an elastic material.

As shown in the figures, a main improvement is to use an endless rolling support 4 whose outer surface 33 has a hemicylindrical shape, namely a section of semicircular shape. Thus, while having a sufficient length to mitigate shocks caused by the presence of small obstacles or imperfections of the ground 15, the use of an endless rolling support 4 of this type considerably reduces the friction surface between the endless rolling support 4 and the ground 15, which results in greater speed and less fatigue for the user. The endless rolling support 4 may also have a total curvilinear section, for example round or oval, of which a fraction of surface - said outer surface 33 - is in contact with the ground and allows different incidences with the ground, the other - said inner surface 28 - bearing bearing on the outer face of each wheel. For this purpose, the rollers are preferably grooved rollers, each groove 3 having a section whose shape preferably corresponds substantially to that of the inner surface 28 of the endless rolling support 4.

In order to prevent the endless rolling support of the rolling belt type 4 from emerging from the groove 3 of the rollers 2 or intermediate rolling support elements 27, especially in the event of significant lateral force on the latter, the internal surface 28 of the endless rolling support 4, namely the surface 28 in contact with the rollers 2, may have a section of semi-circular, trapezoidal, triangular, square, rectangular or other shape.

Various examples of sectional shapes for the inner surface 28 of the endless rolling support 4 are shown in FIGS. 11 to 12, where the outer surface 33 of the endless rolling support 4 has a section of semi-circular shape.

As shown in FIGS. 16 to 20, the outer surface 33 of the endless rolling support 4 may also have a section of radius greater than that of the inner surface 28, so that the hemicylindrical shape of the rolling 4 has a flange 34 bearing on the circumference 36 of the side faces of the rollers 2. As previously described, the rollers 2 preferably have, although not necessarily, an external profile complementary to that of the inner surface 28 of the endless support rolling 4.

In order to prevent the endless rolling support 4 from emerging from the grooves 3 of the rollers 2, it is also possible to provide one or more lateral guides 37 on the chassis 6 on which the rollers 2 are mounted on either side 4. These lateral guides 37 may for example be located between the rollers 2 of the shoe 1, as shown in FIG. 1, where a shoe 1 according to the invention comprises four lateral guides 37. shown in Figures 21 and 22, the lateral guides

37 may for example be in the form of plates 38 attached to the flanks side 13, 14 of the frame 6 on which are mounted the rollers 2, with a portion extending downwards, for example flared downwards so as to have a long guide length for the endless support roll 4 between the rollers 2 and without interfering with them. Alternatively, the side guides 37 may also be integrally formed with the side flanks 13, 14 of the frame 6 on which are mounted the rollers 2 (not shown).

As shown in FIGS. 23 to 26, the lateral guides 37 can also be connected in their lower part by a longitudinal bridge portion 39 disposed near the endless rolling support 4, just above it in its lower part, but without contact. Preferably, the profile of the bridge portion substantially corresponds to that of the inner face 28 of the endless rolling support 4 so that it can not lift.

Another improvement consists in that, in its internal surface 28, namely the surface 28 in contact with the rollers 2, the endless rolling support 4 may have notches 40, preferably transverse and regular, whose depth allows a rotation and a faster and much quieter deformation of the endless rolling support 4. In fact, these notches 40 also increase the overall flexibility of the endless belt-type running support 4 and promote its ability to bend without using a softer material and therefore less resistant to wear.

Indeed, thanks to the invention, it is possible to use a relatively firm endless rolling support 4 which does not need to have a very high plasticity. It is preferably made of polymer material, advantageously having a central wire frame 41. Note that for the sake of simplification of the figures, an endless belt-type running support 4 having notches 40 is only shown in FIGS. 2, 21, 23 and 25.

The number of rollers 2 of the shoe 1 according to the invention is not limiting. There may be more of them, just as this can be reduced to two. The invention described above relates to a shoe 1 equipped with in-line wheels 2 thus constituting the main means of the invention defining the inventive principle. It is understood that doubling this line of wheels 2 on the same runner 1 enters the same inventive concept because of the application of the principle of the duplication of the basic means. In the various figures has been shown a roller skate in line 1 comprising a single series of rollers 2 on which is mounted rolling link kinematics between the rollers or an endless rolling support 4, for example of the belt type.

As indicated above, it is possible to envisage, while remaining within the scope of the present invention, an in-line roller skate 1 comprising at least two rolling assemblies 42 and 43 that are successive and arranged in line with at least two aligned mounted rollers.

FIG. 27 has thus been represented by way of example an in-line roller skate 1 comprising two successive rolling assemblies in line 42 and 43 each having two rollers, one before 44 and the other rear 45. At each Once, the axes of rotation 5 of each of the two aligned rollers 44 and 45 are maintained by a separate frame such as 46 formed for example by two parallel side clevises of which only one of the yokes 47 is visible in the corresponding figure. The two rollers 44 and 45 of each wheel assembly 42 and 43 are separated each time by a pressure roller 48 with a movable axis along a slot 49 transverse to the direction of the kinematic link 4 in its straight portions, forming at each times an intermediate wheel support 50.

On the in-line roller skate 1 comprising the two roller assemblies 42 and 43 of the two aligned rollers 44 and 45, the axis of rotation 5 of the front wheel 44 of each of these two roller sets of two wheels is movably mounted along a slot 51 adjustable inclination by an adjustment device according to the variant shown in Figures 4 to 9. The axis of rotation 5 of the rear rollers 45 of each of these two sets is also movably mounted for example of the same way as for the axis of the front wheel along another slot 52 adjustable tilt for example as above. Another variant also enters the same inventive framework.

This variant is the one shown in FIGS. 28 and 29. According to this variant, the shoe 8 is fixed on an inverted U-shaped frame 53 formed of two yokes 54 and 55 joined together by a plate 56 on which the sole is fixed. 7 of the shoe 8. On this frame 53 is mounted on each side, a wheel assembly 57 and 58 for example identical or similar to those described above. These rolling assemblies 57 and 58 consist of two rollers, one before 59 and the other rear 60 aligned and separated by a roller 61 with an axis of rotation whose position is adjustable along a slot 62 transverse to the kinematic link 4 in its straight parts. This roller 61 forms between the wheels an intermediate rolling contact point 63.

The axis of rotation 5 of the rollers 59 and 60 is movable every time the along a slot respectively 64 and 65 as in the device shown in Figures 4 to 9.

The yokes 54 and 55 of the inverted U-shaped frame 53 rotate the rollers 59 and 60 and the roller 61 of each roller assembly in the form of shaft ends or rolling pins.

We can consider a rotating twinning axis connecting each roulette homologue them with the constraint for these wheels, having to turn at the same speed.

We can also consider each time a common axis 66 and wheels each mounted on a bearing at each end of each common axis 66.

The axes 5 of the rollers 59 and 60 are joined together by a longitudinal twinning plate 67.

This embodiment with dual wheel assembly 57 and 58 provides a better balance to the user but decreases the pleasure of maintaining his own balance while driving and the ability to move quickly.

Finally, an anti-pebble protection 68 may be provided in the front part of the roller skate 1 of the invention, this protection 68 being preferably movable between a low position of use and a high position of erasure. In Figure 30, the low position is shown in solid lines, while the high position is represented in phantom in broken lines.

In the low position, anti-pebble protection 68 is provided to remove for example by brushing the small debris that are present on the ground 15 on the trajectory of the endless rolling support 4: chippings, glass shards, cigarette butts, twigs, etc. This considerably increases the running comfort of the roller skates 1 and also prevents small debris from entering between the rollers 2 where they could alter the operation of the assembly.

Preferably, anti-pebble protection 68 is in the form of a brush-type assembly 69, for example substantially in the form of a snow plow, mounted on a support 70 that can be retracted by tilting between a low position of use and a position high erase. The retractable support 69 is for example pivotable about the axis of rotation 5 of the front wheel 9 to be tilted between these two positions.

As shown in FIGS. 30 and 31, in a preferred embodiment, tilting of the anti-pebble guard 68 is done manually by means of a small lever 71 fixed at the distal end of a support retractable 70 having a brush-type assembly 69 in its near-front part.

As can be seen in FIG. 31, the extreme positions of tilting at the high and low positions can be indexed and maintained, for example by means of a rounded projection 72 provided on the retractable support 70 and which cooperates with two housings 73 on the frame 6 on which the rollers 2 are mounted, these housings 73 being of substantially complementary shape to that of the rounded projection 72 and whose locations correspond to the extreme high and low positions of the race of the projection.

Obviously, the invention is not limited to the preferred embodiment described above and shown in the various figures, the skilled person can make many changes and imagine other variants without leaving the scope or of the scope of the invention.

Claims

1. An improved all-terrain shoe (1) comprising a linear sequence of aligned rollers (2) each rotatably mounted about an axis (5) on a frame (6), rollers (2) on which a bearing without end of rolling (4), together forming a running gear under the boot, the frame (6) being itself mounted removably or fixed on the sole (7) of a shoe (8) for a shoe, characterized in that axis of rotation (5) of at least the front wheel (2, 9) is movably mounted relative to the frame (6) to move from a low position upwards and then back down due to the mechanical stresses followed a release resulting from the use of the roller skate (1) in a path inclined between two end points corresponding to the two limit positions of the front wheel (2, 9), and in that the endless wheel carrier ( 4) constituting the kinematic link between the wheels (2) has characteristics allow ant to cushion the rise of at least the front wheel (2, 9) following each mechanical stress and then to return it down after each mechanical stress from the use of roller skate (1).

Roller skate according to the preceding claim, characterized in that the axis of rotation (5) of the displaced wheel (s) (2, 9) is linearly displaceable in operation along an elongated slot opening (12). inclined forwardly along the axis (10) and formed in the side walls (13, 14) of the frame (6).

Roller skate according to the preceding claim, characterized in that the tension of the endless rolling support (4) keeps the rotational axis (5) of the front wheel (2, 9) in the lower position in the slot ( 12) and exerts an elastic force of resistance and return during the depression.

Roller skate according to Claim 2, characterized in that the angle of inclination of the slot (12) is adjusted by means of an adjustable tilt adjusting disc (16) having a slot (17) provided for the passage of the axis of rotation (5) of the movable mounted roller (2, 9), this axis (5) also passing through an enlarged opening (12, 18) formed in the side walls (13, 14) of the frame (6) on which the rollers (2) are mounted.

5. roller skate according to any one of the preceding claims, characterized in that the angle of inclination (10) is between 0 and 45 °, preferably between 8 and 35 °.

Roller skate according to one of the preceding claims, characterized in that the angle of inclination (10) is between 8 and 35 °.

Roller skate according to one of the claims previous, characterized in that the shape of the perimeter affected by the endless rolling support (4) temporarily changes when the axis of rotation (5) of at least the front wheel (2, 9) moves along the axis (10) tilted forward.

8. roller skate according to any one of the preceding claims, characterized in that the endless rolling support (4) is of the belt type.

9. roller skate according to claim 1, characterized in that at least the axis of rotation (5) of the rear wheel (2, 24) is slidably substantially horizontal in a substantially horizontal straight slot (25).

10. Roller skate according to the preceding claim, characterized in that the position of the axis of rotation (5) of the rear wheel (2, 24) in the substantially horizontal straight slot (25) is indexed by means of a eccentric (26) bearing on the axis of rotation (5) of the wheel (2, 24).

11. roller skate according to claim 1, characterized in that it comprises at least one rolling support element (27) on the inner face (28) of the lower portion of the endless rolling support (4), this at least one support element (27) being provided between two successive rollers (2) of the shoe (1).

12. Roller skate according to the preceding claim, characterized in that the at least one rolling support element (27) is a roller (30) smooth or grooved, or a cylindrical roller, smaller than the rollers (2) and whose outer face (31) bears on the endless rolling support (4).

13. Roller skate according to the preceding claim, characterized in that the groove of each grooved roller (30) constituting a rolling support element (27) is of the same profile shape as that (3) of the rollers (2). .

Roller skate according to claim 1, characterized in that the front wheel (2, 9) and the rear wheel (2, 24) are smaller than the other wheels (2) so that the perimeter formed by the carrier endless rolling (4) has a spatial pattern of substantially trapezoidal assembly.

15. roller skate according to claim 1, characterized in that the endless rolling support (4) has an outer surface (33) of semicircular section.

16. roller skate according to claim 1, characterized in that the endless rolling support (4) has an inner surface (28) of semicircular, trapezoidal, triangular, square or rectangular section.

Roller skate according to Claim 1, characterized in that the rollers (2) are grooved rollers (3), this groove (3) having a cross-section whose shape corresponds substantially to that of the inner surface (28) of the endless rolling support (4).

Roller skate according to claim 1, characterized in that the inner surface (28) of the endless rolling support (4) has transverse cuts (40).

19. roller skate according to claim 1, characterized in that the running gear is formed by the in-line succession of two sets of wheels (42) and (43) each consisting of two in-line wheels (44) and (45) connected between them by the kinematic link (4) and each mounted on a mobile axis of rotation (5), the rollers of the same assembly connected to each other by the kinematic link are separated by a roller (48) with a movable axis transverse to the direction of advance kinematic link (4) to achieve a rolling support (50) on the kinematic link (4).

Roller skate according to Claim 19, characterized in that the movable axis of rotation (5) of each roller (44) and (45) is movable along a reclining slot respectively (51) and (52). .

21. roller skate according to claim 20, characterized in that each slot (51) and (52) is cut in a pivotable part in immobilisable position whose degree of pivoting determines the inclination of the axis of rotation of the wheel corresponding.

Roller skate according to Claim 1, characterized in that the undercarriage forms a wheel assembly (57) and (58) each with at least two in-line wheels (59) under the sole (7) on each lateral side. (60) interconnected by the kinematic link (4) and movable axis of rotation (5), the wheels being separated by a roller (61) axially displaceable transversely to the direction of advance of the kinematic link (4) realizing and a rolling support (63) on the kinematic link.

Roller skate according to claim 22, characterized in that the two roller assemblies are held by an inverted U-shaped frame (53) on the yokes (54) and (55) of which the axes of rotation (5) of the casters (59) and (60).

24. roller skate according to claim 23, characterized in that each time two homologous rollers are interconnected through the frame (53) by a twin axis.

25. Roller skate according to claim 22, characterized in that the axis of rotation (5) of each wheel (59) and (60) is movable along a reclining slot respectively (64) and (65).

Roller skate according to Claim 25, characterized in that each slot (64) and (65) is cut in a pivotable piece with an immobilisable position whose degree of pivoting determines the axis of rotation of the corresponding wheel.

27. roller skate according to claim 1, characterized in that it comprises a pebble protection (68) provided in front of the roller skate (1) for, in use, to remove small debris that are present in ground (15) on the trajectory of the endless rolling support (4), this protection being in the form of a brush-type assembly (69) mounted on a retractable support (70) by tilting between a low position of use and a high erase position.