The present invention concerns, in general, a roller skate having a single wheel and characteristics thereof adapted for facilitating the use thereof.
Currently, it is known to use roller skates with multiple wheels, often four wheels in line or in pairs of two wheels on a front axle and two wheels on a rear axle. These two types of known roller skates are then again split into more specific models according to the material and/or size of the wheels and/or shape of the shoe, etc. Despite this, all these types of roller skates suffer from a shared problem dictated by the small size of the wheels, which makes it impossible, or complicated, to use them on surfaces that are not perfectly smooth.
More specifically, a wheel of a common in-line roller skate has a diameter ranging from 6 cm to 8 cm. This makes even the slightest unevenness of the terrain troublesome. A simple stone 1 cm high, or a step of the same size, or furthermore a groove in the terrain like a manhole cover or other, make skating complicated since even objects of such a small size can cause one or more of the wheels of the roller skate to block.
A solution to this problem consists of using larger wheels. In this case, in order to still make the roller skate compact, as the size of the wheels increases the number thereof is decreased. The extreme scenario of this trend, therefore, is a roller skate having a single large wheel. A roller skate 1 according to such a state of the art is known from U.S. Pat. No. 2,980,436 and is schematically illustrated in
Such a roller skate, nevertheless, suffers from various problems.
Firstly, since the weight of the user is not positioned on the vertical (direction Y) of the point of contact of the wheel 110 with the ground, a force substantially perpendicular to the plane containing the vertical part 120 of the frame is continuously exerted on the leg of the user. Such a continuous pressure on the leg of the user is painful and/or uncomfortable. Such a force also pushes the roller skate in the direction indicated by the arrow 160, thus causing the contact between the end of the horizontal part 130 and/or of the shoe of the user with the ground. This can be mitigated by using higher wheels, but thus resulting in greater weight of the roller skate. Alternatively, the problem can be mitigated by mounting the frame higher up, in direction Y, with respect to the wheel. Such a solution, however, harms the stability of the user on the roller skate since it raises the point of support of the user with respect to the centre of rotation of the wheel.
Moreover, the positioning of the shoe on the horizontal part 130 of the frame forces the user to use the roller skates outside of the two legs. In other words, since the roller skate extends substantially in direction Z with respect to the wheel, the use of the two roller skates is necessarily outside of the legs, given that internal use of the wheels 110 would force the user to constantly move with legs apart, in an uncomfortable and tiring manner.
In addition, the angle between the leg and the plane containing the wheel is fixed. In fact, if one were to introduce an angle between these two elements it would risk the upper or lower end of the vertical part 120 of the frame making contact with the wheel 110 and/or the horizontal part 130 of the frame making contact with the ground. This limits the possibility of personalization by users having different physiognomy, with legs oriented more or less towards the inside or outside of the body. Such a problem can be partially mitigated by increasing the length of the axis 140, so as to allow the frame to be more or less angled with respect to the plane of the wheel 110, but such an approach does nothing but worsen the problems quoted earlier.
There is also the problem of how to control the movement by the user. In particular, a roller skate like the one illustrated in
Finally, the roller skate 1 does not allow quick fastening and/or release of the roller skate by the user.
The present invention has the purpose of providing a roller skate with a single wheel that offers easy operation by the user, preferably solving at least one or more of the problems outlined above.
Such a purpose is obtained thanks to a roller skate according to any one of the independent claims.
Advantageous implementations are also described by the dependent claims.
In particular, the present invention can refer to a roller skate (2-10) with a single wheel comprising: a wheel (2110, 2120); a connection means (230) configured so as to allow the connection of a shoe (S); characterized in that the wheel comprises a first circular element (2110) and a second circular element (2120), inside the first circular element, between the first circular element (2110) and the second circular element (2120) a rolling element (2130) being arranged, configured so as to facilitate the relative movement of the first circular element (2110) with respect to the second circular element (2120); and in that the connection means (230) is connected to the second circular element (2120) and is configured so as to position the shoe (S) at least partially inside the first circular element.
In some embodiments, the rolling element (2130) can be balls, rollers, ball bearings or roller bearings.
In some embodiments, the connection means (230) and the second circular element (2120) can be configured so as to position the shoe (S) at least partially inside the second circular element.
In some embodiments, the connection means (230) can be connected through a first configuration means (2710) and/or a second configuration means (2720) to the second circular element (2120), and the first and/or the second connection means can be configured so as to allow a planar movement of the connection means (230) with respect to the second circular element (2120).
In some embodiments, the connection means (230) can be connected through a third configuration means (2760, 2761) to the second circular element (2120), and the third connection means can be configured so as to allow an angular movement of the connection means (230) with respect to the second circular element (2120).
In some embodiments, the roller skate can also comprise a brake (2810, 2820), where the brake can comprise a first braking element (2820) connected to the first circular element (2110) and a second braking element (2810) connected to the second circular element (2120) and the braking action is obtained by the friction between the first braking element and the second braking element.
The present invention can also refer to a roller skating system comprising a roller skate and an actuator for the brake, in which the actuator can be configured so as to be operated remotely, preferably by hand, by the user of the roller skating system.
In some embodiments, the roller skating system can also comprise a rod, preferably used by the user of the roller skating system in order to aid himself/herself during the use of the roller skating system, in which the actuator is mounted on the rod, preferably at one end and/or at a gripping point thereof.
In some embodiments, the roller skate can also comprise a free wheel system, preferably disinsertable, which can include a sawtooth disc (2910) and at least one elastic return stopper (2920, 2930).
In some embodiments, the sawtooth disc (2910) and the first braking element (2820) can be made from a single element.
In general, the present invention solves the problem of the stability of the roller skate thanks to a construction similar to that of a bearing, with a first outer circular element, and a second inner circular element. Thanks to this construction, the space inside the second circular element is empty, unlike the state of the art, in which such a space is occupied by the spokes of the wheel. Thanks to this it is possible to position the shoe, at least partially, inside the plane of the wheel, in particular at least partially inside the first circular element, and not at the side with respect to it. In this way, the weight of the user is discharged substantially, or at least partially, on the vertical of contact between wheel and ground, and not at the side with respect to such a point, thus avoiding the problems concerning the state of the art, in particular avoiding or reducing the movement according to the direction 160. It will be clear that in order to obtain such an advantage it is not necessary for the shoe to be entirely arranged inside the wheel, with it being sufficient for the position of the shoe to allow the weight, or at least part of the weight, of the user to be discharged on the vertical of contact between the ground and the wheel. The present invention is therefore applicable also in the case in which the shoe is totally contained inside the wheel or is outside of it. It will also be clear that the term “inside the wheel” or “inside the first or second circular element” when referring to the shoe should not be interpreted as if the shoe is an internal part of these components, but it should be interpreted in the sense that the shoe is positioned so as to intersect the plane defined by the wheel, or by the first or second circular element. The term “inside the wheel” or “inside the first or second circular element” is therefore the same that could be used in the case of a rim of a bicycle wheel that is indeed positioned “inside the wheel”, or “inside the tyre of the wheel”.
The other problems relative to the state of the art are also solved by additional embodiments, in particular thanks to the presence of a brake and/or of a free wheel and thanks to their configuration and control, preferably remotely.
The invention will be described in greater detail exclusively as an example, using advantageous embodiments and with reference to the figures. The embodiments described are only possible configurations in which the single characteristics can nevertheless, as described above, be implemented independently from one another or they can be omitted. Elements that are the same illustrated in the figures are marked with the same reference numerals. Parts of the description relative to elements that are the same illustrated in the different figures can be left out. In the figures:
As can be seen in
Between the first and the second circular element there is a rolling element, not illustrated, configured so as to facilitate the relative movement of the first circular element 2110 with respect to the second circular element 2120. In an embodiment the rolling element could be a series of balls, or of rollers, in contact with the first circular element 2110 and the second circular element 2120, in a configuration similar to a ball or roller bearing.
The roller skate 2 also comprises a connection means 230, connected to the second circular element 2120 and, optionally, a stabilization means 250, configured so as to be connected to the leg of the user. The connection of the connection means 230 and/or of the stabilization means 250 to the second circular element 2120 can be carried out with screws, nuts and bolts, glue, fusion, welding, magnets, etc. or quick fastening systems similar to or the same as those used in connections between bicycle pedals and bicycle shoes. Alternatively, the different elements can be obtained in a single physical component.
The connection means 230 can be a platform that allows a user to rest his/her shoe or, in more complex embodiments, it can allow more advanced functions of orientation of the platform and/or connection to the shoe. Such embodiments will be described hereinafter.
Such a configuration allows the connection means 230 to be advantageously positioned with respect to a roller skate according to the state of the art. In particular, the two circular elements 2110 and 2120 allow a roller skate to be obtained without the presence of spokes or other elements inside the wheel, unlike the case illustrated in
It will be clear that, in order to obtain the advantages described above, it is not necessary for the connection means to be connected above the second circular element 2120. So long as the connection means allows a positioning of the shoe of the user such as to position the weight of the user close to the vertical passing through the point of contact of the wheel with the ground, the advantages described above can be obtained. It will therefore be possible to make, for example, a connection means 230 connected to the second circular element 2120 outside of the plane of the wheel and then curved towards the inside of the roller skate, therefore towards the plane of the wheel, so as to advantageously position at least part of the shoe S inside, or in any case close to, the plane X-Y containing the wheel, or in other words inside the wheel itself. Again as an example, the connection means could remain positioned outside the plane X-Y of the wheel but be configured so as to position the shoe S at least partially inside the aforementioned plane. Such a configuration could be obtained, for example, by using a shoe having a sole that is not deformable and laterally connected to a connection means 230 having a vertical shape and positioned proximally to the plane X-Y of the wheel. In this way, although the connection means 230 is not, per se, inside the plane X-Y of the wheel, its configuration allows the shoe to be positioned at least partially inside this plane, or at least partially inside the wheel, or at least partially inside the first circular element, so as to advantageously position the weight of the user above, or close to, the vertical of the resting point of the wheel, and in particular of the first circular element, with the ground.
Although in
In general, by allowing at least one part of the shoe, for example one side thereof, to be inside the plane containing the wheel, it is possible to arrange the barycentre of the weight transferred from the shoe as close as possible to said plane, and therefore as close as possible to the vertical of the support point of the first circular element on the ground, so as to avoid the movement according to the direction 160, suffered by the state of the art.
In an optional manner, a stabilization means 250 can be foreseen, connected to the second circular element 2120. The stabilization means 250 could be made, for example, with a belt and a buckle, and/or with an elastic band and/or a velcro system and/or a magnetic system. The stabilization means 250 makes it possible to fix the leg of the user so as to avoid any excessive stress on the ankle.
As can be seen in
A possible shape of the first and second circular element is illustrated in the sections in
Finally, in the upper section of the roller skate 3, illustrated in
In the roller skate 3bis, a possible alternative shape of the first and second circular element is illustrated in the sections in
With such a structure, the first and/or second circular element can advantageously be made of plastic, for example nylon doped with carbon, to act as a support for the bearing.
As can be seen in
More specifically, in the embodiment illustrated in
In an analogous manner, the second configuration means 2720 is essentially a plane of material with a strength such as to offer a reliable mechanical connection between first configuration means 2710 and the second circular element 2120. The second configuration means 2720 comprises two slide rails 2741, 2742 that extend in direction X in the plane X-Z, inside two sliding guides 2121, 2122 of the second circular element 2120. Also in this case, the number of slide rails and sliding guides is equal to two for a simple example and it will be clear how a larger or smaller number can be selected as an alternative. Thanks to the sliding of the slide rails 2741, 2742 inside the sliding guides 2121, 2122, the relative position of the second circular element 2120 with respect to the second configuration means 2720 can be changed along the direction X.
Thanks to two fastening pins 2730, 2750 it is possible to block the sliding of the rails inside the respective guides, so as to block the relative position of the connection means 230 with respect to the second circular element 2120. When the pins, which could be configured so as to have an elastic resistance to their extraction so as to avoid accidental extraction thereof, are extracted, the two elements 230 and 2120 are movable with respect to one another in the plane X-Z. When the pins are inserted, the position selected by the user is advantageously blocked.
It will be clear that the guides and the slide rails can be reversed. For example, the sliding guides 2311, 2312 could be made in the first configuration means 2710 instead of in the connection means 230, and the slide rails 2751, 2752 vice-versa. It will also be clear that the first and the second configuration means can be joined in a fixedly connected manner or made in a single component. Finally, it will be clear that even only one of the two configuration means 2710, 2720 can be present, in the case in which the movement of the connection means 230 is preferable only according to one of the directions X or Z.
As can be seen in
More specifically, in the embodiment illustrated in
It will be clear that the present configuration is only one possible example of implementation and alternatives, which allow the angular movement of the connection means 230 with respect to the second circular element 2120 can be considered. For example, the holes 2780-2782 can be made in the connection means 230 instead of in the second circular element 2120. Alternatively, or in addition, it is possible to modify the angle between the second circular element 2120 and the connection means 230 using two vertical supports placed between these two elements, and configured so that the height of at least one of these two supports can be modified with respect to the other. By doing this, a support on one side will be lower than on the other side, therefore resulting in the introduction of an angle between the connection means 230 and the second circular element 2120.
It will also be clear that, with analogous systems, it is possible to modify the angle between the connection means 230 and the second circular element 2120 not only with respect to the axis X, but also, or only, with respect to the axis Z. In other words, it will be possible to modify the inclination of the shoe S in the inside-outside direction to the vertical axis of the roller skate, but also, or only, in the toe-heel direction of the shoe S.
Such an angular configuration, potentially in addition with one or more configurations as described for the roller skate 4, allows a level of configuration such as to best adapt, for every use and user, the position of the connection means 230, and therefore the position of the shoe S of the user, with respect to the roller skate.
The roller skate 6 comprises a brake for example made from a disc 2820 and a caliper 2810. Thanks to the brake, it is possible to brake the roller skate. Such a construction is particularly advantageous since it allows braking independently from the position of the connection means 230 with respect to the ground, and therefore independently from the position of the shoe S of the user. In fact, the braking through rear or front brake pad, as is common with in-line roller skates or classic roller skates (with pairs of two front and rear wheels) is not feasible in the roller skate of the invention since, contrary to known roller skates, in the present invention the shoe S of the user is not forced to remain in a substantially horizontal position with respect to the ground. This problem is solved by mounting a brake on the roller skate itself, which does not require direct interaction between the braking means, here the caliper, and the ground.
In particular, the disc 2820 is mounted in a manner fixedly connected with the first circular element 2110 through, for example, fasteners schematically illustrated as 2821 and 2822, positioned on one side of the first circular element 2110 and connected to the disc 2820. Thanks to such construction, the disc 2820 rotates substantially as a unit with the first circular element 2110. The caliper 2810 is mounted in a manner substantially fixedly connected with respect to the second circular element 2120. This can be obtained by mounting the caliper 2810 directly on the second circular element 2120 through screws, glue or similar, or by making the jaw of the caliper in a single structure with the second circular element. Alternatively, the caliper 2810 can be mounted in a fixedly connected manner on the connection means 230. In the second case, if the caliper were to be a hindrance to the positioning of the shoe S, it will be possible to make a structure that, mounted on the connection means in a manner such as to avoid inconvenience to the shoe of the user, extends up to a point along the disc 2820 distant enough from the connection means 230 so as not to be in the region able to be occupied by the shoe S of the user. An example of such an optional structure is illustrated schematically with a dashed line in
The brake can be controlled remotely through a transmission means of the braking force (not illustrated) adapted to control the operation of the caliper 2810. Such control also allows the brake to be controlled by hand by the user, and therefore with greater precision. The brake can be mounted on a single roller skate, in order to simplify the construction of the set of roller skates and limit the costs, or on both. In the case in which it is mounted on both, the transmission means of the braking force can be a single means connected to both of the roller skates, so as to control both brakes with a single command, or both of the brakes with each of the two commands or a transmission means of the braking force for each brake. In the first two cases, the system could be equipped with a braking balancing mechanism so that each roller skate brakes exactly with the same power. In the case in which the transmission means is hydraulic, to brake both with the same power the hydraulic fluid can be made to flow in a single tube before dividing it to make it arrive at both wheels, so as to balance the pressure that arrives on each caliper.
Although in
Although in
An example of a roller skating system is illustrated in
In particular, in
Again in
Both of the actuators 2840, 2850 contain a cylinder 2843 containing a liquid, for example oil for disc brakes, and a piston 2844 acting on the liquid. Through the pressure of the piston on the liquid, it is possible to exert a braking force according to known methods. Both of the actuators 2840, 2850 are optionally assembled on a rod 2841, in an advantageous implementation in which it is helpful for the user to use one or more rods, for example trekking or ski rods, to keep his/her balance. It will be clear that the presence of the rod is nevertheless optional and the actuator 2840, 2850 could be made without any rod.
The actuator 2840 is configured to be used through the user pressing his/her thumb on the button 2846. Such use is optionally facilitated by a handgrip 2845.
The actuator 2850 is configured to be used in a similar manner to a brake lever of a bicycle or motorcycle. The actuator 2850 comprises a lever 2854 and a system of levers and pins 2851, 2852, 2853 that allow the movement of the lever 2854 to be transformed, in a direction practically parallel to Z, into a movement of the piston 2844, in a direction practically parallel to Y.
It will be clear that the two actuators 2840, 2850 are only two possible examples and that the present invention is not limited to this. As an alternative, other hydraulic actuators can be implemented, or actuators operating in different ways, like for example a mechanical actuator operating a metallic wire in an external sheath, in a similar manner to the brake of a bicycle.
In some embodiments, the brake can be temporarily blocked, so as to always be inserted, so as to use the roller skate without it be possible to rotate. This can be useful, for example, during the learning phase to allow the user to become familiar with the position on the roller skate, without the additional difficulty due to the free movement of the wheel.
Such a functionality can be obtained, for example, using an elastic band or a stopper (both not illustrated) acting on the actuator, so as to block the actuator in the braked position. Alternatively, for example in the case of a hydraulic system, it is possible to insert a non-return valve, able to be controlled so as to be activated or deactivated. When the non-return valve is activated, with a pressure on the actuator, the liquid in the braking system will be put under pressure, which will remain under pressure thanks to the action of the non-return valve.
In a variant, the blocking of the brake can be carried out at the level of the caliper 2810. Such a variant is advantageous since it does not force the user to hold the actuator system of the brake and/or the relative rods in hand, during the learning phase.
The roller skate 8 comprises a free wheel system made through a sawtooth disc 2910 and an elastic return stopper 2920, 2930. Thanks to the free wheel system, it is possible to allow the rotation of the roller skate in a single direction.
In particular, the sawtooth disc 2910 is mounted in a substantially fixedly connected manner with the first circular element 2110 through, for example, fasteners schematically illustrated as 2911 and 2912, positioned on one side of the first circular element 2110 and connected to the sawtooth disc 2910. Thanks to such a construction, the sawtooth disc 2910 rotates substantially as a unit with the first circular element 2110.
The elastic return stopper 2920, 2930 is mounted in a substantially fixedly connected manner with respect to the second circular element 2120 and comprises a lever 2920 and an elastic return part on which the lever 2920 is mounted, schematically illustrated by reference numeral 2930. The elastic return part 2930 can be mounted directly on the second circular element 2120 through screws, glue or similar, or made in a single structure with the second circular element 2120. Alternatively, the elastic return part 2930 can be mounted in a substantially fixedly connected manner on the connection means 230.
In an alternative embodiment, the free wheel system can be inserted and disinserted, for example thanks to a locking system of the lever 2920 in a position such that the lever 2920 cannot come into contact with the sawtooth disc 2910. In a potential implementation, this could be obtained by foreseeing a locking pin of the lever 2920, not illustrated, or by making the spring act on the opposite side of the lever 2920 with respect to the point in which it is hinged, so that the spring acts so that it generates a separating movement of the lever 2920 away from the sawtooth disc 2910. When the lever is blocked or moved away, the free wheel system is disinserted, and when it is left free to act under the action of the elastic return part 2930, the free wheel system is inserted.
In a further alternative embodiment, the free wheel system can be inserted and disinserted through a remote control, in a similar manner to the remote control of the brake. Advantageously, the remote control of the free wheel system can be operated by an actuator mounted on the same element on which the actuator of the brake is mounted.
In a further alternative embodiment, the inner or outer edge of the disc of the brake 2820 could be sawtoothed and therefore act both as a brake disc and as a sawtooth disc 2910. In this way, a single disc could allow both functions to be obtained, saving weight.
As can be seen in
As an alternative with respect to the roller skates 2-10, the characteristics of which could in any case be combined with any one of the other roller skates described, the roller skate 9 illustrates a connection means 230 that includes two adjustable connection platforms 231 and 232.
The two connection platforms are such as to allow the connection of a shoe. For example, they can be equipped with threadings corresponding to screws present on the shoe. Alternatively, a quick hooking/release system as used in the pedals of bicycles can be implemented. Again as an alternative, a magnetic system involving magnets in at least one of the connection platforms 231 and 232, and/or in the shoe, can allow a quick fastening and release of the shoe to the connection platforms 231 and 232. In the last case it is preferably possible to provide at least one centring element of the shoe with respect to the connection means 230, for example a hole in the sole of the shoe that cooperates with a suitable pin in the connection means 230 and/or in the connection platforms 231, 232. In this way, the magnetic force will take care of preventing the shoe from moving away from the connection platforms 231 and 232 whereas the magnetic force and the pin can cooperate in preventing the shoe from sliding horizontally on the connection platforms 231 and 232.
As an alternative to the roller skates 3-5, the roller skate 9 offers the possibility of orienting the relative position of the connection platforms 231 and 232 with respect to the connection means 230 through an adjustment shaft 233.
In particular, as can be seen in
As can be seen in
As can be seen in
In this embodiment, the connection means of the shoe S to the roller skate 10 comprises at least two elements, one horizontal 2310 and one vertical 2311. Preferably, more vertical elements 2311 can be used to offer better rigidity of the structure. Again preferably, the horizontal element can be configured in a similar manner to the roller skates 2-9, thus including connection elements to the shoe S, which allow the positioning of the shoe S in a manner that can be configured with respect to the horizontal element 2310.
The connection means is connected to a side, inner or outer respectively, of a bearing 2340, whereas the remaining side of the bearing, outer or inner respectively, is connected to spokes 2321, 2322, in turn connected to the first circular element 2110 through connections 2332, 2331. In this configuration, the part of the bearing to which the vertical part 2311 of the connection element is connected can be compared, by analogy, to the second circular element 2120 described earlier, since it is connected in a substantially fixed manner to the connection element, whereas it is connected in a rotatable manner to the first circular element 2110.
Also in this embodiment, the shoe S can be advantageously positioned, at least partially, inside the plane of the wheel, thanks to an arrangement of the spokes 2321, 2322 externally with respect to the plane of the wheel. In other words, the shoe S can be advantageously positioned at least partially inside the wheel, even though the wheel is a spoked wheel, thanks to the positioning of the spokes outside of the plane defined by the wheel. Like in the previous cases, this allows the weight of the user to be positioned advantageously with respect to the point of contact between wheel and ground.
It will be clear that the characteristics of the roller skates 2-10, even though they have been described independently with the purpose of making them easier to illustrate and describe, can be combined with each other freely.
In the above description, reference has been made to a roller skate with a single wheel in which the connection means 230 is configured so as to position the shoe S at least partially inside the first circular element 2110. However, the present invention is not limited to this configuration.
In an alternative embodiment of the present invention, the connection means 230 can be made so as to allow the weight of the user to be discharged close to the point of contact between wheel and ground without however requiring the positioning of at least part of the shoe inside the first circular element 2110. The positioning of the shoe at least partially inside the first circular element 2110 is a way to discharge the weight of the user in an advantageous manner. The present invention also covers alternative ways of obtaining such a result.
In some embodiments, the connection element 230 has a positive angle, measured in the clockwise direction with respect to the direction Z, on the plane y-z illustrated in
In other words, thanks to the positive angle, measured in the clockwise direction, between the horizontal upper surface of the connection means 230 and the direction Z, the user will tend to position the roller skate so as to place the base of the shoe S, and therefore the horizontal upper surface of the connection means 230, in a substantially horizontal position (parallel to the axis Z). This will lead to the plane containing the wheel of the roller skate taking up a negative angle, measured in the clockwise direction with respect to the direction Y. This results in bringing the point of contact between the second circular element 2110 and the ground and the crossing point between the vertical passing through the connection means 230 and the ground closer together.
In other words again, the movement closer together of the point of contact of the circular element 2110 and the ground and the point at which the weight force vector deriving from the leg of the user meets the ground can be obtained by taking the shoe outside of the plane of the wheel and tilting the wheel with respect to the connection means 230 in a suitable manner.
It is therefore possible to bring the point on the ground on which the weight of the user is projected closer towards the point of contact between wheel and ground, so as to avoid or at least reduce the force schematically illustrated by the arrow 160 in
It is not necessary for the angle provided to the connection means 230 to be such as to perfectly match up the crossing point between the vertical passing through the connection means 230 and the ground with the point of contact between the second circular element 2120 and the ground. In order to obtain easier use of the roller skate and so as to reduce the inconvenience caused by the force schematically illustrated by the arrow 160 in
In another alternative embodiment of the present invention, it is possible to bring the crossover point between the vertical passing through the connection means 230 and the ground closer together with the point of contact between the second circular element 2120 and the ground, without the connection means 230 having an angle with respect to the direction Z as described earlier. This is possible by distancing the stabilization means 250 from the second circular element 2120. In this way, the leg of the user is forced to be arranged with a positive angle, measured in the clockwise direction, with respect to the direction Y. This positioning obtains advantageous effects similar to those described in relation to the previous embodiment, in particular bringing the crossover point between the vertical passing through the connection means 230 and the ground closer together with the point of contact between the second circular element 2110 and the ground, with respect to the case illustrated in
In a further embodiment, the two solutions described in the two previous embodiments, i.e. the implementation of an angle between the horizontal upper surface of the connection means 230 and the direction Z, as well as taking the stabilization means 250 away from the second circular element 2120, can also be advantageously combined. Moreover, in alternative embodiments, one or both of the two previous embodiments can be combined with a connection means 230 as described in relation to
It is therefore clear that the present invention should not be considered limited to the case in which the connection means 230 is configured so as to position the shoe S inside the first circular element 2110.
Moreover, the present invention can be implemented in embodiments in which the connection means 230 is not configured so as to position the shoe S inside the first circular element 2110, and the two alternative solutions consisting of the use of an angle for the horizontal upper surface of the connection means 230 or of distancing the stabilization means 250 from the second circular element 2120 are not implemented. In such embodiments, the moment schematically illustrated by the arrow 160 in
In particular, the embodiment described with reference to
In an analogous manner, the embodiments described with reference to
Again in a similar way, the embodiments described with reference to
In particular, an embodiment of the present invention can therefore also refer to a roller skating system comprising a roller skate with a single wheel, the roller skate with a single wheel comprising: a wheel; a connection means configured so as to allow the connection of a shoe; characterized in that the wheel comprises a first circular element and a second circular element, inside the first circular element, between the first circular element and the second circular element a rolling element being arranged, configured so as to facilitate the relative movement of the first circular element with respect to the second circular element; the connection means is connected to the second circular element, and by a brake, where the brake comprises a first braking element connected to the first circular element and a second braking element connected to the second circular element and the braking action is obtained by the friction between the first braking element and the second braking element, and in that the roller skating system also comprises an actuator for the brake, in which the actuator is configured so as to be operated remotely, preferably by hand, by the user of the roller skating system; and a rod, preferably used by the user of the roller skating system in order to aid him/herself during the use of the roller skating system, where the actuator is mounted on the rod, preferably at one end and/or at a gripping point thereof.
Similarly, the embodiment described with reference to
Number | Date | Country | Kind |
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VI2014A0251 | Sep 2014 | IT | national |
Filing Document | Filing Date | Country | Kind |
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PCT/IB2015/001947 | 9/29/2015 | WO | 00 |
Publishing Document | Publishing Date | Country | Kind |
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WO2015/051262 | 4/7/2016 | WO | A |
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5312120 | Wiegner | May 1994 | A |
5951028 | Lovitt et al. | Sep 1999 | A |
20080272567 | Chen | Nov 2008 | A1 |
20100109266 | Jenkins | May 2010 | A1 |
Number | Date | Country |
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108952 | Jun 1925 | CH |
365513 | Dec 1922 | DE |
571303 | May 1924 | FR |
753203 | Oct 1933 | FR |
753203 | Oct 1933 | FR |
Entry |
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Written opinion issued by the Italian ministry of economics (eqt. to US Dept. of Commerce) in Italian patent application No. VI2014A000251, which is the Italian equivalent of the above-identified US patent application. |
Number | Date | Country | |
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20170209774 A1 | Jul 2017 | US |