FIELD OF INVENTION

[0001] The present invention is related to a mobile device for a wheelchair, a wheelchair for a mobile device and a mobile device and a wheelchair. More specifically, the present invention is related to a mobile device for a wheelchair, enabling said wheelchair to move on stairs and aiding said wheelchair in moving on a flat terrain. Furthermore, the present invention is related to a wheelchair for use with a mobile device, adapted for use with said mobile device to move on stairs and a flat terrain. The present invention is also related to a mobile device with a wheelchair, said wheelchair being configured for moving on stairs and a flat terrain by means of a mobile device.

BACKGROUND OF THE INVENTION

[0002] Mobile devices are used to aid disabled persons using manual wheelchairs in moving on stairs. Such mobile devices usually comprise mobile tracked assemblies allowing said mobile devices to move on stairs together with a wheelchair.

[0003] In order to ensure stability of a tracked mobile device for wheelchairs for moving on stairs, tracked assemblies have to have an appropriate length and geometry. At the same time, mobile devices shall not obstruct the movement of such mobile device on stairs or a flat terrain. Numerous technical solutions have been proposed regarding tracked mobile devices for wheelchairs, allowing a disabled person to travel on stairs by means of a manual wheelchair.

[0004] American patent application No. US 2006/0076739 discloses a mobile device comprising mobile assemblies for use with a wheelchair. The mobile device comprises mobile assemblies comprising two sections oriented at an open angle relative to each other. This geometry allows the mobile device with a wheelchair to travel on stairs.

[0005] German utility model No. DE 861409 U1 is related to a wheelchair with tracked mobile assemblies. The mobile assemblies are each comprised of two sections, wherein the rear section of each of the assemblies is oriented upwards at an angle relative to the rear section.

[0006] American patent application No. US 3529688 A discloses a mobile device for a wheelchair comprising mobile tracked assemblies. Each of the mobile assemblies is comprised of two sections. The mobile sections of each mobile assembly have a spatial orientation changing rotatably relative to each other during the movement of the mobile device with a wheelchair on stairs.

[0007] American patent application No. US 2006/0037789 Al discloses a mobile device for use with a wheelchair. Said mobile device comprises two tracked assemblies. The individual assemblies are comprised of three sections of a mobile assembly. The individual sections of the corresponding mobile assemblies rotatably change their spatial orientation to aid the movement of said mobile device with a wheelchair on stairs.

[0008] Despite the provision of numerous technical solutions of a mobile device for a wheelchair for moving on stairs, there is still a demand for a mobile device suitable for use with many kinds and models of wheelchairs. Moreover, there is still a demand for a mobile device for a wheelchair that aids the user of a wheelchair in travelling in it or saves them the trouble of operating it.

SUMMARY OF THE INVENTION

[0009] The present invention is proposed to meet the above-mentioned demand.

[0010] In the first aspect, the present invention is related to a mobile device for a wheelchair, as specified in the independent claim 1.

[0011] The preferred embodiments and variants of the mobile device are as specified in the dependent claims 2 to 6.

[0012] In the second aspect, the present invention is related to a wheelchair for a mobile device, as specified in the independent claim 7.

[0013] The preferred embodiments and variants of a wheelchair are as specified in the dependent claims 8 to 11.

[0014] In the third aspect, the present invention is related to a mobile device for a wheelchair, wherein the mobile device is the device as specified above, whereas the wheelchair is the wheelchair as specified above.

[0015] Thus, the present invention provides a mobile device which is usable with many types and models of wheelchairs. Moreover, the mobile device for a wheelchair according to the invention aids the user of a wheelchair in travelling in it or saves them the trouble of operating it. Furthermore, the present invention provides a wheelchair for use with a mobile device.

BRIEF DESCRIPTION OF THE FIGURES OF THE DRAWING

[0016] The invention will now be described in more detail by means of examples with reference to the figures of the drawing, wherein:

Fig. 1 presents a perspective front and left-side view of the mobile device according to the invention in an idle mode,

Fig. 2 is a perspective rear and left-side view of the mobile device of Fig. 1 in an idle mode,

Fig. 3 is a left-side view of the mobile device of Fig. 1 in the idle mode,

Fig. 4 is a front view of the mobile device of Fig. 1 in the idle mode,

Fig. 5 is a perspective view of the wheelchair according to the invention, with an enlarged view of the detail A shown at the top, on the right, and an enlarged view of the detail B shown at the top, on the left,

Fig. 6 is a side view of the mobile device of Fig. 1 and the wheelchair of Fig. 5 in logged-in mode,

Fig. 7 is a perspective front and left side view of the mobile device and the wheelchair in the logged-in mode, with an enlarged view of the detail C shown top right,

Fig. 8 is a perspective front and left side view of the mobile device and the wheelchair in the logged-in mode, with an enlarged view of the detail D shown top right,

Fig. 9 is a side view of the mobile device and the wheelchair in the logged-in mode, with an enlarged view of the detail E shown top right,

Fig. 10 is a perspective front and left side view of the mobile device and the wheelchair in the logged-in mode, with an enlarged view of the detail F shown top left,

Fig. 11 is a rear view of the mobile device with the logged-in wheelchair in the idle mode, with an enlarged view of the detail G shown top right,

Fig. 12 is a perspective rear right side view of the mobile device with the logged-in wheelchair in the idle mode, with an enlarged view of the detail H shown top right, Fig. 13 is a side view of the mobile device with the logged-in wheelchair in the idle mode, with an enlarged view of the detail I shown top right,

Fig. 14 is a side view of the mobile device with the logged-in wheelchair in the transport mode,

Fig. 15 is a cross-sectional side view of the mobile device with the logged-in wheelchair in the mode of Fig. 14, Fig. 16 is a side view of the mobile device with the logged-m wheelchair in one of the configurations in the stair mode,

Fig. 17 is a cross-sectional side view of the mobile device with the logged-in wheelchair in the mode of Fig. 16,

Fig. 18 is another cross-sectional side view of the mobile device with the logged-in wheelchair in the mode of Fig. 16, with an enlarged view of the detail J shown top right,

Fig. 19 is a side view of the mobile device with the logged-in wheelchair in the stair mode,

Fig. 20 is a cross-sectional side view of the mobile device with the logged-in wheelchair in the mode of Fig. 19,

Fig. 21 is another cross-sectional side view of the mobile device with the logged-in wheelchair in the mode of Fig. 19, with an enlarged view of the detail K shown top right,

Fig. 22 is a side view of the mobile device with the logged-in wheelchair in the stair mode of Fig. 19 commencing climbing stairs, with an enlarged view of the detail L shown top left,

Fig. 23 is a side view of the mobile device with the logged-in wheelchair in the stair mode of Fig. 19 continuing to climb stairs, with an enlarged view of the detail M shown top right and an enlarged view of the detail N shown on the right,

Fig. 24 is a side view of the mobile device with the logged-in wheelchair in the stair mode of Fig. 19 following climbing the last stair of a flight of stairs, with an enlarged view of the detail O shown top right, and an enlarged view of the detail P shown on the right.

DETAILED DESCRIPTION OF THE INVENTION

[0017] In the figures of the drawing the components of the technical solution or the components having the same function are marked by means of the same numerals. Any directional marks are applied herein to introduce the disclosure of the present invention and should not be taken to limit the invention. Directional designations, such as right, left, top, bottom, front, rear, in front of, behind, over, under, above, below, at the back, in the front, inside, outside are defined in view from the front of the mobile device, the wheelchair and/or the mobile device installed on the wheelchair, the mobile device and/or the seat of the wheelchair being viewed from the front. [0018] The mobile device 1 for the wheelchair 100 comprises a mobile system comprising a first mobile assembly 2 and a second mobile assembly 2, as shown in Figs. 1 and 2. The first mobile assembly 2 and the second mobile assembly 2 are arranged at a distance from and parallel relative to each other such that they comprise a right mobile assembly and a left mobile assembly, as shown in Figs. 3 and 4. The purpose of the mobile assemblies 2 is to move the mobile device 2 on stairs and/or a flat terrain. The mobile assemblies 2 have the same design, wherein the individual components are arranged such that they mirror the opposite components of the right mobile assembly 2 and the left mobile assembly 2, as shown in Fig. 4. Thus, the design of the mobile assemblies 2 of the mobile device 1 according to the invention will be described by way of example of one of them.

[0019] The mobile assembly 2 of the mobile device 1 according to the invention comprises a front section 3 of the mobile assembly, a middle section 4 of the mobile assembly and a rear section 5 of the mobile assembly. The middle section 4 of the mobile assembly is behind the front section 3 of the mobile assembly and is rotatably connected therewith. In turn, the rear section 5 of the mobile assembly is behind the middle section 4 and is rotatably connected therewith. Thus, the mobile assembly 2 has a configuration of rotatably connected consecutive front section 3 of the mobile device, the middle section 4 of the mobile device and the rear section 5 of the mobile device, as shown in Figs. 1 to 4.

[0020] The front section 3 of the mobile device comprises a frame 6 of the front section. The frame 6 constitutes a load-bearing element for the consecutive components of the front section 3 of the mobile assembly. On the frame 6 of the front section there is arranged a first rotating wheel comprising the front wheel 7 of the front section of the mobile assembly 2. On the frame 6 there is arranged a second rotating wheel comprising the rear wheel 8 of the front section of the mobile assembly 2. The rear wheel 8 of the front section is arranged at a distance from the front wheel 7 of the front section of the mobile device 2, as shown in Figs. 3 and 17 to 18. The front section 3 of the mobile assembly comprises a track 9 of the front section extending in a loop over the front wheel 7 of the front section and the rear wheel 8 of the front section of the mobile assembly 2, as shown in Figs. 3 and 17 to 18. The track 9 is used for moving the first section 3 of the mobile assembly on stairs and/or a flat terrain. The length of the front section 3 of the mobile assembly is chosen such that it ensures stability of movement of the mobile device 1 with the wheelchair 100 on stairs, as it will be described in detail below. In addition, the front section 3 of the mobile assembly is configured such that said front section 3 of the mobile assembly is hidden under the wheelchair 100 and does not collide with the front wheels 105 of the wheelchair 100 being mounted on the mobile device 1 according to the invention, as shown in Fig. 9.

[0021] The middle section 4 of the mobile assembly is structured analogously to the front section 3 of the mobile assembly. Therefore, the middle section 4 of the mobile assembly comprises a frame 10 of the middle section. The frame 10 constitutes a load-bearing element for the consecutive components of the middle section 4 of the mobile assembly. On the frame

10 of the middle section 4 there is arranged a first rotating wheel comprising the front wheel

11 of the middle section of the mobile assembly 2. On the frame 10 there is arranged a second rotating wheel comprising the rear wheel 12 of the middle section of the mobile assembly 2. The rear wheel 12 of the middle section is arranged at a distance from the front wheel 11 of the middle section of the mobile device 2, as shown in Figs. 3 and 17 to 18. The middle section 4 of the mobile assembly comprises a track 13 of the middle section extending in a loop over the front wheel 11 of the middle section and the rear wheel 12 of the middle section of the mobile assembly 2, as shown in Figs. 3 and 17 to 18. The track 13 is used for moving the middle section 4 of the mobile assembly on stairs and/or a flat terrain in cooperation with the front section 3 of the mobile assembly. In a preferred embodiment, the frame 10 of the middle section is bent such that the top of the bend protrudes outside the middle section 4 of the mobile assembly on the side of the contact with a flat terrain and/or stairs between the front wheel 11 of the middle section and the rear wheel 12 of the middle section. In a more preferred embodiment, the top of the bend is substantially located in the centre, between the front wheel 11 of the middle section and the rear wheel 12 of the middle section, as shown in Figs. 19 to 21. Such shape of the frame 10 of the middle section allows the mobile device 1 according to the invention to assume a configuration which is particularly advantageous for the user of the wheelchair 100 while traveling on stairs, especially while ascending and descending stairs, as shown in Figs. 21 and 24. The length of the middle section 4 of the mobile assembly is chosen such that it ensures stability of movement of the mobile device 1 with the wheelchair 100 on stairs, as it will be described in detail below. In addition, the middle section 4 of the mobile assembly is configured such that said middle section 4 of the mobile assembly does not contact the seat 102 and/or does nor contact the handles 103 of the wheelchair 100 when said wheelchair 100 is mounted on the mobile device 1 and the mobile device 1 is in the idle and transport mode, as shown in Fig. 11.

[0022] The middle section 4 of the mobile assembly is rotatably connected with the front section 3 of the mobile assembly. In one of the embodiments, the rear wheel 8 of the front section and the front wheel 11 of the middle section are arranged contiguous to each other on one axle, as shown in Figs. 3 and 4. In such case, the middle section 4 of the mobile assembly and the front section 3 of the mobile assembly are rotatable around the axle extending through the centre of the rear wheel 8 of the front section and the front wheel 11 of the middle section, as shown in Figs. 14, 16 and 19. In this embodiment, the middle section 4 of the mobile assembly is mounted on the internal side of the front section 3 of the mobile assembly of the mobile device 1 according to the invention, as shown in Fig. 4. Such arrangement of the middle section 4 of the mobile assembly relative to the front section 3 of the mobile assembly prevents this middle section 4 of the mobile assembly from colliding with the frame 101 of the wheelchair, particularly with the elements of the frame 101 of the wheelchair protruding at the back and used by an assisting persons to lift the wheelchair.

[0023] The rear section 5 of the mobile assembly is structured analogously to the front section 3 of the mobile assembly and the middle section 4 of the mobile assembly. Therefore, the rear section 5 of the mobile assembly comprises a frame 14 of the rear section. The frame 14 constitutes a load-bearing element for the consecutive components of the rear section 5 of the mobile assembly. On the frame 14 of the rear section 5 there is arranged a first rotating wheel comprising the front wheel 15 of the rear section of the mobile assembly 2. On the frame 14 there is arranged a second rotating wheel comprising the rear wheel 16 of the rear section of the mobile assembly 2. The rear wheel 16 of the rear section is arranged at a distance from the front wheel 15 of the rear section of the mobile assembly 2, as shown in Figs. 3 and 17 to 18. The rear section 5 of the mobile assembly comprises a track 17 of the rear section extending in a loop over the front wheel 15 of the rear section and the rear wheel

16 of the rear section of the mobile assembly 2, as shown in Figs. 3 and 17 to 18. The track

17 is used for moving the rear section 5 of the mobile assembly on stairs and/or flat terrain. The length of the rear section 5 of the mobile assembly is chosen such that it allows the mobile device 1 with the wheelchair 100 mounted thereon to climb the first stair of a flight of stairs as the mobile device 1 with the wheelchair 100 commences ascending stairs, as it will be described in detail below.

[0024] The rear section 5 of the mobile assembly is connected with the middle section 4 of the mobile assembly in an analogous manner as the middle section 4 of the mobile assembly is connected with the front section 3 of the mobile assembly. Therefore, the rear section 5 of the mobile assembly is rotatably connected with the central section 3 of the mobile assembly. In one of the embodiments, the rear wheel 12 of the middle section and the front wheel 15 of the rear section are arranged contiguous to each other on one axle, as shown in Figs. 3 and 4. In such case, the rear section 5 of the mobile assembly and the middle section 4 of the mobile assembly are rotatable around the axle extending through the centre of the rear wheel 12 of the middle section and the centre of the front wheel 15 of the rear section, as shown in Figs. 14, 16 and 19. In this embodiment, the rear section 5 of the mobile assembly is mounted on the external side of the middle section 4 of the mobile assembly of the mobile device 1 according to the invention, as shown in Fig. 4. Consequently, the front section 3 of the mobile assembly and the rear section 5 of the mobile assembly are arranged on the same side of the middle section 4 of the mobile assembly, on the external side of the middle section 4 of the mobile assembly of the mobile device 1 according to the invention, as shown in Fig. 4.

[0025] The tracks 9, 13 i 17 of the front section 3 of the mobile assembly, the middle section 4 of the mobile assembly and the rear section 5 of the mobile assembly, respectively, constitute an elastic element with high grip, allowing interfacing with stairs and/or a flat terrain in order to travel on stairs and/or a flat terrain, respectively. In a preferred embodiment, the tracks 9, 13, and 17 comprise tread adapted for further increase of their grip on stairs and/or a flat terrain, on which the mobile device 1 according to the invention is to travel. In a preferred embodiment, the tread of the tracks 9, 13, and 17 contains a number of protrusions arranged along the tracks 9, 13, and 17, wherein the individual protrusions are arranged at a distance from each other, parallel to each other and transversely to the tracks 9, 13 and 17, as shown in Figs. 1 to 4. In a more preferred embodiment, the protrusions of the tread have a triangular cross section, as shown in Fig. 3. The geometry of the tread of each track is not limited to that described above and any other tread can be used which provides a stable and firm grip of the track on the surface for the movement of the mobile device 1 on stairs and/or a flat terrain. In the above-described embodiment, the tracks 9, 13 and 17 of the front section 3 of the mobile assembly, the middle section 4 of the mobile assembly and the rear section 5 of the mobile assembly, respectively, are identical. Nevertheless, the mobile device 1 according to the invention is not limited to, and, depending on the needs, different tracks can be used for the front section 3 of the mobile assembly, the middle section 4 of the mobile assembly and the rear section 5 of the mobile assembly, respectively.

[0026] The mobile assembly 2 comprises a reconfiguration assembly 25 of the rear section 5 of the mobile assembly. The purpose of the reconfiguration assembly 25 of the rear section 5 of the mobile assembly is to change the rotational orientation of the rear section 5 of the mobile assembly relative to the middle section 4 of the mobile assembly, together with changing the rotational orientation of the middle section 4 of the mobile assembly relative to the front section 3 of the mobile assembly during the reconfiguration of the mobile device 1 according to the invention with the wheelchair 100 between the particular modes, as it will be described in more detail below. In one of the embodiments of the mobile device 1, the reconfiguration assembly 25 of the rear section 5 of the mobile assembly comprises a pull member 26. The pull member 26 of the reconfiguration assembly is arranged in the middle section 4 of the mobile assembly and one of the ends of the pull member 26 is coupled with the rear wheel axle mechanism 12 of the middle section, as shown in Fig. 15. The other end of the pull member 26 is coupled with the front wheel axle mechanism 11 of the middle section by means of a spring 27. During the reconfiguration of the mobile device 1 the motion from the axle mechanism of the front wheel 11 of the middle section of the mobile assembly 2 is transmitted by means of the pull member 26 to the axle mechanism of the rear wheel 12 of the middle section 4, further to the axle mechanism of the front wheel 15 of the rear section resulting in a change of orientation by means of rotating the rear section 5 around the axle of the front wheel 15 of the rear section of the mobile assembly 2, as shown in Figs. 14 to 21. In a preferred embodiment, the pull member 26 is a wire. In another preferred embodiment, the pull member is a rod. In a preferred embodiment, the spring is a flat spring. The reconfiguration assembly 25 of the rear section of the mobile assembly is not limited to the above-described embodiment and any technical means can be used to allow orientating the rear section 5 of the mobile assembly during the reconfiguration of the mobile device 1 according to the invention between the particular operating modes. For example, but not limited to, the reconfiguration assembly 25 of the rear section 5 of the mobile assembly comprises a toothed gear (not shown in the figures), wherein the ratio of the toothed gear is configured such that the reconfiguration assembly 25 of the rear section 5 of the assembly effects the change of the orientation of the rear section 5 of the mobile assembly as described above for the reconfiguration assembly 25 with a pull member. In yet another non-limiting example, the reconfiguration assembly 25 of the rear section 5 of the mobile assembly comprises a belt drive, for example, with a V-belt (not shown in the figures), wherein the ratio of the belt drive is configured such that the reconfiguration assembly 25 of the rear section 5 of the mobile assembly effects the change of the orientation of the rear section 5 of the mobile assembly, as described above for the reconfiguration assembly 25 with a pull member.

[0027] The mobile assembly 2 comprises a transport mode wheel assembly 18. The transport mode wheel assembly 18 comprises a wheel 19 of the transport mode wheel assembly 18, as shown in Fig. 13. The transport mode wheel assembly 18 is installed in the front section 3 of the mobile section such that the wheel 19 of the transport mode wheel assembly is located by the front wheel 7 of the front section 3 of the mobile assembly, as shown in Fig. 13. The purpose of the transport mode wheel assembly 18 is to provide a fulcrum of the mobile device 1 according to the invention near the front wheel 7 of the front section of the mobile assembly 2. The transport mode wheel assembly 18 is installed on the internal side of the front section 3 of the mobile assembly, as shown in Fig. 4. In one of the embodiments, the transport mode wheel assembly 18 is fixedly oriented relative to the front wheel 7 of the front section of the mobile assembly 2. Furthermore, the transport mode wheel assembly 18 is arranged such that the wheel 19 of the wheel assembly is below the front wheel 7 of the front section of the mobile assembly 2 (not shown in the figures). Thanks to this configuration, the wheel 19 of the wheel assembly of the mobile device 1 according to the invention is in constant contact with the surface as the mobile device 1 with the wheelchair 100 travels on stairs and/or a flat terrain. In another embodiment, the transport mode wheel assembly 18 is mobile relative to the front wheel 7 of the front section of the mobile assembly 2. In such case, the transport mode wheel assembly 18 can be moved closer such that in one of the settings the wheel 19 of the wheel assembly is below the front wheel 7 of the front section of the mobile assembly 2, as shown in the Fig. 13, and in another setting the wheel 19 of the wheel assembly is arranged within the contour of the front section 3 of the mobile assembly, as shown in Fig. 21. In one of the embodiments, the movement of the wheel assembly is realized by means of a cam-and-pulley assembly. One of the embodiments of such cam-and-pulley assembly for moving the wheel assembly to establish contact of the wheel 19 of the wheel assembly is shown in Figs. 13, 18 and 21. In a preferred embodiment of the mobile device 1 according to the invention, the transport mode wheel assembly 18 comprises a cam 20 of the wheel assembly, whose one end is mounted in the axle of the wheel 19 of the wheel assembly. On the other end of the cam 20 of the wheel assembly there is rotatably mounted an additional wheel 21 of the wheel assembly, at a distance from and behind the wheel 19 of the wheel assembly (not shown in the figures). The additional wheel 21 of the wheel assembly is fixedly oriented relative to the wheel 19 of the wheel assembly. Use of the additional wheel 21 of the wheel assembly provides a two-point support for the mobile assembly 2 on the surface near the front wheel 7 of the front section of the mobile assembly 2 in the transport mode. Moreover, use of the additional wheel 21 of the wheel assembly provides the wheel assembly 18 with the so-called rocker. In such case, in the idle and the transport mode, the mobile device 1 with the wheelchair 100 rests on the rocker while on a flat terrain, and in the stair mode, it moves over the stair edges by rocking.

[0028] The mobile assembly 2 comprises a shock-absorbing wheel assembly 22. The shock-absorbing wheel assembly 22 comprises an arm 23 of the shock-absorbing wheel, whose one end is rotatably mounted in the transformation system, described in detail below, of the mobile device 1 according to the invention, between the particular modes of the mobile device 1, as shown in Figs. 10, 14, 16 and 19. To the other end of the arm 23 of the shockabsorbing wheel there is rotatably fixed a shock-absorbing wheel 24. The shock- absorbing wheel assembly is arranged on the internal side of the mobile assembly 2, as shown in Fig. 2. The purpose of the shock-absorbing wheel assembly 22 is to cushion the wheelchair 100 and prevent it from falling over as the mobile device 1 with the wheelchair 100 moves in the transport mode and as the mobile device 1 according to the invention with the wheelchair 100 is being reconfigured between the transport mode and the stair mode, as shown in Figs. 10, 14, 16 and 19, and as it will be described in more detail below. The shock absorption for the wheelchair 100 is realized by an additional fulcrum being provided by the shockabsorbing wheel 24 of the shock absorbing wheel assembly at a distance from the rear wheel 8 of the front section of the mobile assembly 2. The shock- bsorbing wheel assembly 22 is mounted on the internal side of the front section 3 of the mobile assembly, as shown in Fig. 2.

[0029] The mobile assembly 2 comprises a mounting assembly 28 for mounting the mobile assembly 2 to the main wheel of the wheelchair 100, which shall be described in more detail below. The purpose of the mounting assembly 28 is to mount the mobile device

1 to the main wheel 104 of the wheelchair 100, to a corresponding mobile assembly 2 of the mobile device 1. The mounting assembly 28 comprises a mounting section 29. The mounting section 29 comprises at least one arm 30. In one of the embodiments, the mounting section 29 comprises one arm 30 (not shown in the figures), which arm 30 comprises at one end a mounting point for the mobile assembly 2 and at the other end a tip 31 comprising a mounting point for the wheelchair 100. In such case, the mounting section 29 of the mounting assembly comprises a two-point mounting system for the mobile assembly 2 and the wheelchair 100, respectively. In another embodiment, the mounting section 29 comprises two arms 30, which arms 30 are connected at the tip 31 of the mounting section, as shown in Figs. 3 and 10. The arms 30 of the mounting section comprise at their ends, on the side opposite the tip 31, mounting points for the mobile assembly 2, whereas the tip 31 comprises a mounting point for the wheelchair 100, as shown in Figs. 3 and 10. The mounting points of the mounting section 29 for the mobile assembly and the wheelchair 100 are arranged in the vertices of a triangle. In other words, the mounting section 29 of the mounting assembly comprises circumscribed by a triangle a two-point mounting system for the mobile assembly

2 and the wheelchair 100, respectively, as shown in Figs. 3 and 10. In a preferred embodiment, the arms 30 of the mounting section have essentially the same length, as shown in Fig. 3. In a preferred embodiment, the arms 30 are oriented relative to each at a straight angle, as shown in Fig. 3. The geometry of the mounting section 29 is not limited to that described above and any other shape can be used ensuring a three-point fixing of said mounting section 29 to the mobile assembly 2 and to the wheelchair 100. In an embodiment of the mobile device 1 according to the invention, at least one of the arms 30 of the mounting shape has an adjustable length. In a preferred embodiment, the length of the arm 30 is adjustable within the range of about ±10 mm. Alternatively or additionally, the angle at which the arms 30 of the mounting section of the mobile assembly 2 are oriented is adjustable. In a preferred embodiment, the angle at which the arms 30 of the mounting section are oriented is adjustable within the range of about +15°. This way, the mobile device

1 according to the invention can be adjusted for use with wheelchairs 100 having the main wheels of a different diameters and different inclination angles. Thus, the mobile device 1 according to the invention can be used with different types and models of wheelchairs, such as, but not limited to, active wheelchairs, stabilization wheelchairs, sports wheelchairs, offroad wheelchairs and indoor wheelchairs.

[0030] The mounting assembly 28 of the mobile assembly comprises two supporting pins (32, 33). Generally, at least one of the supporting pins (32, 33) is attached to the mounting point of at least one of the arms 30 of the mounting section of the mounting assembly 28 for the mobile assembly 2.

[0031] In the embodiment, wherein the mounting section 29 of the mounting assembly comprises at least one arm 30 of the mounting section, as described above, one of the ends of the first supporting pin is attached to the mounting point of the arm 30 of the mounting section of the mounting assembly 28 and the other end of such first supporting pin is attached to one of the front section 3 of the mobile assembly in the axle of the rear wheel 8 or the rear section 5 of the mobile assembly in the axle of the of front wheel 16 of the rear section. By contrast, one of the ends of the second supporting pin is attached to the second of the front section 3 of the mobile assembly in the axle of the rear wheel 8 or the rear section 5 of the mobile assembly in the axle of the front wheel 16 of the rear section. The other end of the second supporting pin a free end. In a preferred embodiment, the first pin is connected with the arm 30 of the mounting assembly and the rear section 5 of the mobile assembly in the axle of the front wheel 16 of the rear section of the mobile assembly 2 thus constituting the rear supporting pin 33. By contrast, the second pin is attached to the front section 3 of the mobile assembly in the axle of the rear wheel 8 of the front section of the mobile assembly

2 thus constituting the front supporting pin 32. [0032] In the embodiment, wherein the mounting section 29 of the mounting assembly comprises two arms 30 of the mounting section, as shown in the figures, one of the ends of one of the supporting pins is attached to the mounting point of one of the arms 30 of the mounting section of the mounting assembly 28. More specifically, such one of the ends of such one of the supporting pins is attached to the mounting point of the arm 30 pointing downwards following the orientation of the mounting section 29, as shown in Fig. 3, thus constituting the front supporting pin 32. The other end of the front supporting pin 32 is attached to the front section 3 of the mobile assembly in the axle of the rear wheel 8 of the front section of the mobile assembly 2, as shown in Fig. 3. The front supporting pin 32 is mounted on the external side of the front section 3 of the mobile assembly, as shown in Fig. 4. One of the ends of the second supporting pin is attached to the mounting point of the second of the arms 30 of the mounting section 29 of the mounting assembly. More specifically, such one of the ends of the second supporting pin is attached to the mounting point of the arm 30 pointing upwards following the orientation of the mounting section 29, as shown in Fig. 2, thus constituting the rear supporting pin 33. The other end of the rear supporting pin 33 is attached to the rear section 5 of the mobile assembly in the axle of the front wheel 16 of the rear section of the mobile assembly 2, as shown in Fig. 3. The rear supporting pin is mounted on the external side of the rear section 5 of the mobile assembly, as shown in Fig. 4.

[0033] Thus, the front supporting pin 32 and/or the rear supporting pin 33 in the respective embodiments, as described above, define a space between the mobile assembly 2 and the mounting section 29 of the mounting assembly, for receiving in this space the main wheel 104 of the wheelchair 100, as shown in Figs. 4 and 11, and as it will be described in more detail below. Furthermore, the front supporting pin 32 and/or the rear supporting pin 33 of the mounting assembly in the respective embodiments described above takes mainly the weight of the wheelchair 100 when the mobile device 1 with the wheelchair 100 is in the stair mode, as shown in Figs. 14 to 21 for one of the embodiments. In the embodiment of the mobile device 1 according to the invention, the front supporting pin 32 and/or the rear supporting pin 33 of the mounting assembly have an adjustable length. This way, the mobile device 1 according to the invention can be adjusted for use with wheelchairs having a different track width of the main wheels. In a preferred embodiment of the mobile device according to the invention, the length of the front supporting pin 32 and/or the length of the rear supporting pin 33 are adjustable within the range of about ±60 mm. [0034] The mounting assembly 28 also comprises a latch mechanism 35 for mounting the mounting assembly 28 to the main wheel of the wheelchair 100. The latch mechanism 35 is arranged within the tip 31 of the mounting section 29 of the mounting assembly, as shown in Fig. 3. The latch mechanism 35 is arranged on the mounting section 29 within a notch constituting a seat, which seat constitutes a third mounting point of the mounting section, such third mounting point constituting a mounting point for the wheelchair 100, as shown in Figs. 9 and 10. In an embodiment of the mobile device 1, the latch mechanism 35 comprises a latch adapted for being snapped on the axle of the main wheel of the wheelchair 100, as shown in Fig. 10. The latch mechanism 35 comprises a lever 37 of the latch mechanism, coupled with the latch 36. The lever 37 is rotatably movable within the latch mechanism 35 and its rotation allows to decouple the latch 36 from the axle 106 of the main wheel of the wheelchair 100, as shown in Fig. 9, and/or to couple the latch on the axle 106 of the main wheel of the wheelchair 100, as shown in Fig. 10. The lever 37 of the latch mechanism comprises a button 38 for preventing an unintended or accidental displacement of the lever 37 of the latch mechanism, thus particularly preventing an unintended release of the main wheel 104 of the wheelchair from the mobile assembly 2 of the mobile device. In the presented embodiment, the latch mechanism 35 comprises one latch 36, as described above. However, the latch mechanism 35 is not limited to that and two opposite latches can be applied (not shown in the figures) which can snap around the axle of the main wheel of the wheelchair 100 in a way analogous to the one described above.

[0035] The mobile device 1 according to the invention comprises a reconfiguration system of the mobile device. Reconfiguration of the mobile device is understood to mean a change of the position of the particular components of the mobile device 1 according to the invention in order to switch the mobile device 1 into a specified mode of operation in which specified mode of operation the particular components of the mobile device 1 according to the invention are in a specified position relative to the other components of the mobile device 1. In particular, reconfiguration relates to changing the relative position of the front section 3 of the mobile assembly, the middle section 3 of the mobile assembly and the rear section 5 of the mobile assembly such that they share a spatial orientation specified for a given mode of operation of the mobile device 1 according to the invention, as it will be described in detail below.

[0036] In this embodiment, the reconfiguration system of the mobile device 1 is one and common for a simultaneous reconfiguration of the right mobile assembly 2 and the left mobile assembly 2. The reconfiguration system of the mobile device comprises a reconfiguration assembly 39 of the front section and the middle section of the mobile assemblies 2 of the mobile device 1 according to the invention. The reconfiguration assembly 39 of the front section and the middle section of the mobile assemblies 2 is arranged in the mobile device 1 between the right mobile assembly 2 and the left mobile assembly 2, as shown in Fig. 11. The reconfiguration assembly 39 of the front section and the middle section of the mobile assemblies 2 comprises a lever assembly 40. The lever assembly 40 in connected with the front section 3 of the mobile assembly and the middle section 4 of the mobile assembly, the right mobile assembly 2 and the left mobile assembly 2, respectively.

[0037] In an embodiment, the lever assembly 40 comprises a lever system comprising levers and cams in a mutual spatial arrangement and connected such that the operation of the lever assembly 40 causes the front section 3 of the mobile assembly and the middle section 4 of the mobile assembly, the right mobile assembly 2 and the left mobile assembly 2, respectively, to assume a mutual orientation of the particular sections 3, 4, 5 of the mobile sections 2 suitable for a specified mode of operation, as shall be described below in more detail.

[0038] The reconfiguration assembly 39 of the mobile device comprises at least one actuator. In one of the embodiments the reconfiguration assembly 39 comprises one actuator 41. In this embodiment, the actuator 41 of the reconfiguration assembly is arranged substantially in the centre, between the left mobile assembly 2 and the right mobile assembly 2, as shown in Fig. 2. In this embodiment, the actuator 41 is coupled with the lever assembly 40 for operating said lever assembly 40 through the operation of said actuator 41 and drives the lever assembly 40. The actuator 41 is configured for ejecting and retracting the execution element of the actuator 41. The motion of the execution element of the actuator 41 is transmitted to the lever system of the lever assembly 40 of the reconfiguration assembly, this motion being transmitted by the lever system of the lever assembly 40 causing a change of the orientation of the front section 3 of the mobile assembly relative the middle section 4 of the mobile assembly, the right mobile assembly 2 and the left mobile assembly 2 simultaneously. The movement of the execution element of the actuator 41 by a predetermined length causes the movement of the lever of the lever assembly 40 in a predetermined way and the movement of the front section 3 of the mobile device relative to the middle section 4 of the mobile assembly to a defined mutual orientation for the left mobile assembly 2 and the right mobile assembly 2, suitable for a given position of the execution element of the actuator, which shall be described in more detail below. In another embodiment, the reconfiguration assembly 39 of the mobile device comprises two actuators. In this embodiment, the two actuators are arranged between and near the corresponding left mobile assembly 2 and the right mobile assembly 2 (not shown in the figures). In this embodiment, the actuators are coupled with the lever assembly 40 and work in a manner analogous to that of the above-described embodiment with one actuator 41.

[0039] The reconfiguration system of the mobile device 1 according to the invention also comprises a reconfiguration assembly 25 of the rear section of the mobile assembly, as described above for the mobile assembly 2, the right mobile assembly 2 and the left mobile assembly 2, respectively. The reconfiguration assembly 25 of the rear section of the mobile assembly, the right mobile assembly 2 and the left mobile assembly 2, respectively, are both coupled with the reconfiguration assembly 39 of the front section and the middle section of the mobile assemblies 2 such that the operation of the latter causes the operation of the reconfiguration assembly 25 of the rear section. In other words, during the operation of the reconfiguration assembly 39, in order to change the spatial orientation of the front section 2 of the mobile assembly relative to the middle section 4 of the mobile assembly, the assembly simultaneously causes the operation of the reconfiguration assembly 25 in order to simultaneously change the spatial orientation of the rear section 5 of the mobile assembly relative to the middle section 4 of the mobile assembly for the left mobile assembly 2 and the right mobile assembly 2, respectively. Consequently, the simultaneous operation of the reconfiguration assembly 39 in conjunction with the reconfiguration assembly 25 results in a simultaneous spatial orientation of the front section 3 of the mobile assembly, the middle section 4 of the mobile assembly and the rear section 5 of the mobile assembly, the right mobile assembly 2 and the left mobile assembly 2, respectively, for a specified mode of operation of the mobile device 1 according to the invention.

[0040] The reconfiguration system of the mobile device 1 according to the invention also comprises a shock-absorbing wheel assembly 22, as described above for the mobile assembly 2, for the right mobile assembly 2 and the left mobile assembly 2, respectively. The shock- absorbing wheel assembly 22 of the right mobile assembly 2 and the left mobile assembly 2, respectively, are both coupled with the reconfiguration assembly 39 of the front section and the middle section of the mobile assemblies 2 such that the operation of the latter causes simultaneous operation of shock-absorbing wheel assembly 22. Although in the above-described embodiment the shock-absorbing wheel assembly 22 is described as a component of the mobile assembly 2, the present invention is not limited thereto. Nevertheless, one integrated shock-absorbing wheel assembly 22 can be used, common for the right mobile assembly 2 and the left mobile assembly 2. In such case, the integrated shock-absorbing wheel assembly 22 comprises respectively two arms 23 of the shockabsorbing wheel and related thereto corresponding shock-absorbing wheels 24, wherein the arms 23 of the shock-absorbing wheel assembly are connected with each other forming a rigid component with the two shock-absorbing wheels 24 to increase the firmness of the support via the integrated shock-absorbing assembly.

[0041] The mobile device 1 according to the invention comprises a system of levelling the seat of the wheelchair 100. The system of levelling the seat of the wheelchair 100 comprises a seat levelling assembly 42 of the wheelchair 100. The seat levelling assembly 42 is arranged in the mobile device 1 according to the invention between the right mobile assembly 2 and the left mobile assembly 2, as shown in Fig. 1. The seat levelling assembly 42 comprises a seat levelling actuator 43 of the wheelchair 100. The actuator 43 is configured for ejecting and retracting the execution element of the seat levelling actuator 43. The movement of the execution element of the actuator 43 of the seat levelling assembly 42 causes an orientation of the seat 102 of the wheelchair in a position suitable for a specified mode of operation of the mobile device 1 according to the invention, as it will be described below in detail. The seat levelling actuator 43 comprises an execution element at the end of which there is arranged a hitch 44 of the seat levelling actuator, as shown in Figs. 1 and 3. The hitch 44 of the seat levelling actuator is configured for coupling with the expander 108 of the wheelchair 100. In an embodiment of the mobile device 1, the hitch 44 of the seat levelling actuator is made in the form of two opposite shoes, which oppositely couple with the expander 108 of the wheelchair 100 (not shown in the figures). In another embodiment, the hitch 44 comprises one shoe (not shown in the figures) which allows coupling with the expander 108 of the wheelchair 100 in a manner analogous to that described above. In another embodiment, the hitch 44 comprises a hitch shape with a handle for rotatable clamping on the expander 108 of the wheelchair 100, as shown in Figs. 7 and 8. The hitch 44 also comprises a lock for preventing an accidental or unintended decoupling of the hitch shape from the expander 108 of the wheelchair 100. In a preferred embodiment, the seat levelling assembly 42 of the mobile device 1 according to the invention also comprises a guide 45 of the seat levelling actuator for protecting the actuator 43 from damage resulting from lateral forces acting on the actuator 43. In a preferred embodiment, the guide 45 of the seat levelling actuator is made in the form of a pipe element inside of which there is arranged the seat levelling actuator 43, as shown in Fig. 3. One of the ends of the guide 45 of the seat levelling actuator is arranged near the hitch 44 of the seat levelling actuator and the end contains a cavity constituting a seat configured to receive the expander 108 of the wheelchair, as shown in Fig. 13, when the hitch 44 of the seat levelling actuator is coupled with the expander 108 of the wheelchair. Use of the guide 45 increases the stability and firmness of the connection between the seat levelling actuator 43 and the expander 108 of the wheelchair.

[0042] The mobile device 1 according to the invention comprises a power transmission system. The power transmission system comprises a power transmission assembly 46 of the mobile assembly. In an embodiment, the power transmission system of the mobile device 1 according to the invention comprises a power transmission assembly 46 of the mobile assembly for the right mobile assembly 2 and the left mobile assembly 2, respectively, as shown in Fig. 1. In other words, each of the right mobile assembly 2 and the left mobile assembly 2 comprises its own power transmission assembly 46 of the mobile assembly. The power transmission assembly 46 of the mobile assembly comprises a propulsion 47 of the mobile assembly. The propulsion 47 of the mobile assembly is arranged in the front section 3 of the mobile assembly near the front wheel 7 of the front section of the mobile assembly 2, as shown in Figs. 1 and 2. The propulsion 47 of the mobile assembly comprises a motor and a power transmission system, which power transmission system is coupled with the front wheel 7 of the front section of the mobile assembly to power said front wheel. From the front wheel 7 of the front section, the power is transmitted to the track 9 of the front section in order to move the mobile device 1 according to the invention by means of the front section 3 of the mobile assembly. From the front wheel 7 of the front section, the power is transmitted by means of the track 8 of the front section to the rear wheel 8 of the front section and further to the front wheel 11 of the middle section by means of the axle mechanism of the particular wheels. From the front wheel 11 of the middle section, the power is transmitted to the track 13 of the middle section in order to move the mobile device 1 according to the invention by means of the middle section 4 of the mobile assembly. From the front wheel 11 of the middle section, the power is further transmitted by means of the track 13 of the middle section to the rear wheel 12 of the middle section and further to the front wheel 15 of the rear section by means of the axle mechanism of the particular wheels. From the front wheel 15 of the rear section is subsequently transmitted to the track 17 of the rear section in order to move the mobile device 1 according to the invention by means of the rear section 5 of the mobile assembly. The above-described transmission of power from the propulsion 47 of the power transmission assembly of the mobile assembly 2 allows powering the first section 3 of the mobile assembly, the middle section 4 of the mobile assembly and the rear section 5 of the mobile assembly. In the above-described embodiment, each of the mobile assemblies 2 comprises its own power transmission assembly 46 of the mobile system thus allowing independent propelling of the right mobile assembly 2 and the left mobile assembly 2, respectively. Nevertheless, the mobile device 1 according to the invention is not limited thereto and, depending on the needs, a single power transmission assembly 46 of the mobile assembly can be used to power the right mobile assembly 2 and the left mobile assembly 2, wherein the transmission of power to the right mobile assembly 2 and the left mobile assembly 2, respectively, is realized thanks to independent power transmission systems for independently transmitting the power from the motor to the front wheel 7 of the middle section of the right mobile assembly 2 and the left mobile assembly 2, respectively. In the above-described embodiment, the propulsion 47 of the mobile assembly is coupled with the front wheel 7 of the front section of the mobile assembly 2 and is further transmitted to the second wheels within the front section 3 of the mobile assembly and further consecutively to the middle section 4 of the mobile assembly and the rear section 5 of the mobile assembly. Nevertheless, it is possible to couple the propulsion 47 of the mobile assembly with any of the wheels from any of the sections of the mobile assembly and to transmit the respective power to the other sections of the mobile assembly, as described in the above embodiment.

[0043] The power transmission system of the mobile device 1 according to the invention comprises a power transmission assembly 48 of the main wheel of the wheelchair 100. In an embodiment, the power transmission system of the mobile device 1 according to the invention comprises a power transmission assembly 48 of the main wheel for the right mobile assembly 2 and the left mobile assembly 2, respectively, as shown in Fig. 1. In other words, each of the right mobile assembly 2 and the left mobile assembly 2 comprises its own power transmission assembly 48 of the main wheel. The power transmission assembly 48 of the main wheel for the mobile assembly 2 comprises a drive sleeve 50 of the main wheel arranged on the front supporting pin 32 or on the rear supporting pin 33 for powering the corresponding main wheel of the wheelchair 100. In an embodiment of the mobile device 1 according to the invention, the drive sleeve 50 of the main wheel of the wheelchair 100 is arranged on the front supporting pin 32, as shown in Fig. 11. The power transmission assembly 48 of the main wheel for the mobile assembly 2 comprises a propulsion 49 of the main wheel of the power transmission assembly 48 of the main wheel. The propulsion 49 of main wheel is arranged in the front section 3 of the mobile assembly near the rear wheel 8 of the front section. In an alternative embodiment, the propulsion 49 of the main wheel is arranged in another section of the mobile assembly. The propulsion 49 of the main wheel comprises a motor and a power transmission system, which power transmission system is coupled with the drive sleeve 50 of the main wheel for powering the main wheel 104 of the wheelchair by the motor of the propulsion 49 of the main wheel. In the above-described embodiment, each of the mobile assemblies 2 compnses its own power transmission assembly 48 of the main wheel thus allowing independent propelling the right main wheel 104 and the left main wheel 104 of the wheelchair. Nevertheless, the mobile device 1 according to the invention is not limited thereto and, depending on the needs, a single power transmission assembly 48 of the main wheel can be used to power the right main wheel 104 and the left main wheel 104 of the wheelchair 100, wherein the transmission of power to the right main wheel 104 and the left main wheel 104 is realized thanks to independent power transmission systems for independently transmitting the power from the motor to the drive sleeve 50 of the main wheel of the right mobile assembly 2 and the left mobile assembly, respectively. In an alternative embodiment, the motor of the propulsion 49 of the main wheel is located in the supporting pin 32, 33 and the power is transmitted directly to the drive sleeve

50 of the main wheel arranged on said supporting pin 32, 33.

[0044] The mobile device 1 according to the invention comprises a control system for controlling the individual components of the mobile device. The control system comprises a controller assembly performing the functions of controlling the mobile device 1 according to the invention. The controller assembly is configured for controlling the reconfiguration system of the mobile device and the system of levelling the seat for switching between the particular modes of operation of the mobile device 1 according to the invention. The controller assembly is also configured to control the power transmission system for powering the mobile system for moving the mobile device 1 according to the invention by means of the mobile assemblies 2.

[0045] The control system comprises a control panel 51 in a data transmission connection with the controller assembly. The control panel 51 allows the mobile device 1 according the invention to be controlled by the user in a wheelchair. The control panel 51 is configured for mounting on the wheelchair 100, as shown in Fig. 10, in a position convenient for the user for controlling the mobile device 1 according to the invention and the wheelchair 100 mounted thereon. The control panel 51 comprises control components in the form of buttons and a joystick for controlling the mobile device 1 according to the invention. The control panel 51 also comprises display elements for displaying the working parameters of the mobile device 1 according to the invention. In an alternative embodiment, the control panel

51 is software-realized in the form of a programme executable by a digital device. In a preferred embodiment, the digital device constitutes a device configured for a wireless data transmission connection with the controller assembly. In such case, as described above, the control components of the control panel 51 are realized in the form of a programme as part of the user programme interface, for example, by means of pictograms on the user interface, indicating the corresponding buttons and the joystick, as well as display elements of the user interface for displaying the working parameters of the mobile device 1 according to the invention. In a preferred embodiment but not limited to, the digital device is selected from among a mobile phone or a tablet, and the programme is an application suitable for a mobile phone or a tablet.

[0046] The mobile device 1 according to the invention comprises a power system for powering the electrical components of the mobile device 1 according to the invention, in particular, the reconfiguration system, the system of levelling the seat, the power transmission system and the control system. The power system comprises at least one powering battery 52. The power system also comprises accessories for charging the battery/batteries 52. The accessories for charging the batteries 52 allows for them to be charged from the mains.

[0047] The wheelchair 100 for the mobile assembly 1 according to the invention comprises a frame 101 of the wheelchair. On the frame 101 of the wheelchair there is arranged a seat 102 on which the user seats during the operation of the wheelchair 100. In a preferred embodiment, the wheelchair 100 comprises two handles 103 arranged above the support of the seat 102 and on its sides, as shown in Fig. 5, for manoeuvring the wheelchair by a person assisting the user in travelling in the wheelchair 100. The wheelchair 100 according to the invention comprises a pair of independent main wheels 104 arranged in the rear part of the seat 102 and on its sides, as shown in Fig. 5, wherein the main wheels 104 are adapted for being driven by means of the muscular power of the user for driving and manoeuvring the wheelchair. Thus, the wheelchair according to this embodiment is a manual wheelchair. The wheelchair 100 also comprises a pair of independent front swivel wheels 105 arranged in the front part of the seat 102 and on its sides, as shown in Fig. 5. Thus, the front wheels are arranged before the corresponding main wheels 104 of the wheelchair, as shown in Fig. 5. The front wheels provide rolling support in the front of the wheelchair 100 and to allow the user travelling in such wheelchair 100 to turn it.

[0048] The wheelchair 100 comprises an axle 106 of the main wheel on of the main wheels 104, as shown in Fig. 5. The axle 106 of the main wheel comprises a flange 107 arranged at a distance from the end of the axle 106 of the main wheel to the side of the main wheel 104, as shown in Fig. 5, such that between the flange 107 and the main wheel 104 there is a space which receives the mounting section 29 of the mounting assembly of the mobile device 1, as shown in Figs. 9 and 10. The wheelchair 100 also comprises an expander 108 mounted on the frame 101 near the front wheels 105 and below the seat 102 of the wheelchair 100, as shown in Fig. 5. In this embodiment of the wheelchair 100, the expander 108 constitutes a pipe element attached to the frame 101 of the wheelchair, as shown in Fig. 5. The expander 108 is adapted for coupling with the hitch 44 of the actuator of the seat levelling assembly 42 of the mobile device 1 according to the invention, as shown in Figs. 8 and 15, for levelling the seat 102 of the wheelchair during changing the mode of operation of the mobile device 1 and/or as the wheelchair 100 moves on the mobile device 1.

[0049] In one of the embodiments of the present invention a wheelchair 100, as described above, is provided. In another embodiment of the present invention, a traditional, manual, commercially available wheelchair can be used. Such wheelchair can be adopted for using with the mobile device 1 according to the invention. Adapting a traditional wheelchair for use with the mobile device 1 according to the invention involves replacing the axles of the main wheels of a traditional, manual wheelchair with the axles 106 of the main wheel with the flange 107, as described above, in order to ensure the function of mounting to the axles of the main wheels of the wheelchair corresponding with the mounting sections 29 of the mounting assembly of the mobile device 1 according to the invention, as described above and as shown in Fig. 5. Adapting a traditional wheelchair for use with the mobile device 1 according to the invention also involves installing the expander 108 on the frame of such wheelchair near the front wheels 105 and below the seat in order to provide the function of coupling the wheelchair with the hitch 44 of the actuator of the seat levelling assembly 42 of the mobile device 1 according to the invention, as described above and as shown in Figs. 8 and 15, for levelling the seat of the wheelchair during changing the mode of operation of the mobile device 1 and/or as the wheelchair 100 moves on the mobile device 1 according to the invention. In a preferred embodiment, the expander 108 of the wheelchair is detachable. Providing a detachable expander 108 allows a wheelchair to remain foldable when the wheelchair 100 according to the invention is a foldable wheelchair.

[0050] Use of the mobile device 1 according to the invention with the wheelchair 100 according to the invention will be described below. In addition, the configuration of the mobile device 1 according to the invention in the particular modes of operation and the switching of the mobile device 1 according to the invention with the wheelchair 100 mounted thereon will be described below.

[0051] Use of the mobile deice 1 according to the invention starts with the mobile device in the idle mode. The mobile device 1 in the idle mode is separated from the wheelchair 100, as shown in Figs. 1 to 4. In the idle mode, the mobile device rests on a flat terrain in the configuration of the mobile device in the idle mode. In this mode, the mobile device 1 sits on a flat terrain, resting on the tracks 9 in the front part of the front section 3 of the mobile assembly, the right mobile assembly 2 and the left mobile assembly 2, respectively, and on the shock-absorbing wheels 24 of the shock-absorbing wheel assembly, as shown in Figs. 1 to 4. The front section 3 of the individual mobile assemblies 2 is oriented slightly oblique relative to the flat terrain and is in contact with the flat terrain via the tracks 9 near the front wheel 7 of the front section of the right mobile assembly 2 and the left mobile assembly 2, as shown in Fig. 3. The middle section 4 of the mobile assembly of the individual mobile assemblies 2 is oriented substantially perpendicular to the flat terrain. In other words, the middle section 4 of the mobile assembly of the individual mobile assemblies 2 of the mobile device 1 is substantially perpendicular to the corresponding front section 3 of the mobile device, as shown in Fig. 3. The rear section 5 of the mobile assembly of the individual mobile assemblies 2 is also oriented substantially vertically toward the terrain. In other words, the end section 5 of the mobile assembly of the individual mobile assemblies 2 of the mobile device 1 is substantially parallel to the corresponding middle section 3 of the mobile device and at the same time perpendicular to the corresponding front section 3 of the mobile section 3 of the mobile device. Thus, the end section 5 of the mobile device of the individual mobile assemblies 2 of the mobile device 1 is within the contours of the middle section 4 of the mobile assembly of the corresponding mobile assemblies 2, as shown in Fig. 3. At the same time, the seat of the mounting section 29 of the mounting assembly is directed toward the front of the mobile device 1, as shown in Fig. 3. Furthermore, the seat levelling actuator 43 of the seat levelling assembly 42 is directed with the hitch 44 pointing toward the front of the mobile device 1, as shown in Fig. 3. The above-described configuration of the mobile assemblies 2, the mounting section 29 and the seat levelling actuator 43 of the mobile device 1 is also referred to as a folded configuration. In the embodiment with the control panel 51, said control panel 51 can be mounted within the hitch 44 of the seat levelling actuator, as shown in Figs. 1 to 3.

[0052] In order to adapt the mobile device 1 according to the invention with the wheelchair 100 according to the invention, the wheelchair 100 must be logged into the mobile device 1. In other words, in order to adapt the mobile device 1 according to the invention, the wheelchair 100 according to the invention must be mounted in the mobile device 1.

[0053] In order to log the wheelchair 100 into the mobile device 1, the user, seating in the seat 102 of the wheelchair 100 reverses by manually powering the main wheels 104 of said wheelchair, as shown in Figs. 6 and 7. While reversing, the user drives the wheelchair 100 according to the invention between the mounting sections 29 of the mounting assembly of the opposite mobile assemblies 2 until the main wheels 104 of the wheelchair contact the rear supporting pin 33 of the mounting assembly of the individual mobile assemblies 2 and the drive sleeve 50 of the main wheel on the front supporting pin 32 of the mounting assembly of the corresponding mobile assemblies 2, as shown in Figs. 7 to 9. Simultaneously, the axles 106 of the main wheel of the wheelchair 100 enter the seats of the corresponding mounting sections 29 of the mounting assembly, as shown in Fig. 9. In an embodiment, the expander 108 of the wheelchair enters the seat of the guide 45 of the seat levelling actuator and said expander 108 of the wheelchair contacts the open hitch 44 of the seat levelling actuator, as shown in Fig. 7. In one of the embodiments, the bringing of the expander 108 of the wheelchair in contact with the hitch 44 of the seat levelling actuator results in the self-locking of the hitch 44 of the seat levelling actuator on the expander 108 of the wheelchair. In another embodiment, when the expander 108 contacts the hitch 44 of the seat levelling actuator, the user manually rotates the hitch 44 of the seat levelling actuator to lock the hitch 44 of the seat levelling actuator on the expander 108 of the wheelchair, as shown in Fig. 8. Subsequently, the user of the wheelchair 100 according to the invention moves the lever 37 to snap the latch 36 of the latch mechanism of the right mobile assembly 2 and the left mobile assembly 2 on the axle 106 of the main wheel of the right main wheel 104 and the left main wheel 104, respectively, of the wheelchair, as shown in Figs. 9 and 10. In one of the embodiments, wherein the mounting section 29 of the mounting assembly comprises one arm 30, as described above, the snapping of the latch mechanism 35 of a given mobile assembly 2 causes also the tightening of the corresponding main wheel 104 of the wheelchair on the front supporting pin 32 or the rear supporting pin 33, respectively and, consequently, on the drive sleeve 34 of the mobile assembly 2, arranged on said supporting pin 32, 33 (not shown in the figures). In another embodiment, wherein the mounting section 29 of the mounting assembly comprises two arms 30, as described above, the snapping of the latch mechanism 35 of a given mobile assembly 2 causes also the tightening of the corresponding main wheel 104 of the wheelchair on the front supporting pin 32 and the rear supporting pin 33, respectively and, consequently, on the drive sleeve 34 of the mobile assembly 2, arranged on one of these supporting pins 32, 33, shown in the Figs. 10 and 11. Finally, the user of the wheelchair 100 mounts the control panel 51 of the control system within the seat 102 of the wheelchair, as shown in Figs. 10 and 11. In another embodiment, wherein the control panel 51 is realized in the form of a programme for a digital machine, the mounting of the control panel 51 is realized by wireless logging of the programme of the digital machine, preferably digital machine of the user, into the controller assembly of the control system of the mobile device 1. This way, the wheelchair 100 according to the invention is logged into the mobile device 1 according to the invention, which is ready to be used with the wheelchair 100 mounted thereon.

[0054] In order to enable the mobile device 1 with the wheelchair 100 to move on a flat terrain, in particular in order to enable the mobile device 1 with the wheelchair to approach stairs, the mobile device 1 has to be reconfigured in order to set the wheel/wheels 19, 21 of the wheel assembly into a position supporting the mobile device 1 according to the invention. To this end, the cam-and-pulley assembly of the wheel assembly 18 of the transport mode is activated, which ejects the wheel/wheels 19, 21 of the wheel assembly of the right mobile assembly 2 and the left mobile assembly 2, respectively, and lifts the front section 3 of the mobile assembly, the right mobile assembly 2 and the left mobile assembly 2, respectively, above a flat terrain, as shown in Figs. 11 and 13. Reconfiguration of the mobile device 1 according to the invention from the idle mode to the transport mode, as described above, is realized by means of the control panel 51 of the control system, for example, by pressing a button on the control panel 51 for switching the mobile device 1 into the transport mode or by activating the pictogram on the programme interface on the digital device, representing the switching of the mobile device 1 into the transport mode.

[0055] In the transport mode of the mobile device 1 with the wheelchair 100 logged in, the mobile device 1 rests on a flat terrain on the wheels 19, 21 of the wheel assembly of the transport mode and on the shock-absorbing wheels 24 of the shock- absorbing wheel assembly of the individual mobile assemblies 2, while the wheelchair 100 rests on the flat terrain on the main wheels 104 and the front wheels 105, as shown in Figs. 11 and 13. The front section 3 of the individual mobile assemblies 2 is oriented substantially parallel relative to the flat terrain is slightly lifted above it such that the tracks 9 of the front section 3 of the mobile assembly, the right mobile assembly 2 and the left mobile assembly 2, respectively, as shown in Figs. 11 and 13. The operation of the motor of the power transmission assembly 48 of the main wheel causes the powering of the drive sleeve 50 of the main wheel of the right mobile assembly 2 and the left mobile assembly 2, which in turn causes the powering of the right main wheel 104 and the left main wheel 104 respectively, of the wheelchair 100 to rotate the corresponding main wheels 104 and thus to move the wheelchair 100. As the mobile device 1 is configured for independent powering of the right main wheel 104 and the left main wheel 104 of the wheelchair, respectively, as described above, the wheelchair can move controllably with respect to the speed and the direction. In this mode, the mobile device according to the invention aids the wheelchair 100 according to the invention to move. The movement of the wheelchair 100 in the transport mode is realized by means of the control panel 51 of the control system, for example, by means of the joystick, by moving it in the direction in which the user intends to go, or by activating a pictogram on the programme interface on the digital device, representing the movement in the direction in which the user intends to go.

[0056] In order to enable the movement of the mobile device 1 with the wheelchair 100 on stairs, the mobile device 1 must be reconfigured in order to set the mobile assemblies 2 of the mobile device for moving on stairs. To this end, the mobile device 1 is switched from the transport mode into the stair mode. The switching of the mobile device 1 from the transport mode into the stair mode starts by activating the reconfiguration assembly actuator 33. Extension of the controller 33 causes the powering of the lift assembly 40 of the reconfiguration assembly resulting in the lowering of the middle section 4 of the mobile assembly around the front wheel 11 of the middle section of the right mobile assembly 2 and the left mobile assembly 2, respectively, while simultaneously retracting the shockabsorbing wheel 22 of the shock-absorbing wheel assembly of the right mobile assembly 2 and the left mobile assembly 2, respectively, as shown in Figs. 14 to 19 at particular stages. During the lowering of the middle section 4 of the mobile assembly, the right mobile assembly 2 and the left mobile assembly 2, respectively, the shock-absorbing wheel 24 of the shock-absorbing wheel assembly of the right mobile assembly 2 and the left mobile assembly, respectively, of the mobile device 1, remains in contact with the flat terrain thus stabilizing the position of the wheelchair 100 on the mobile device 1, in particular, preventing the wheelchair 100 from falling backward together with the user. In one of the embodiments, simultaneously activated is the cam-and-pulley assembly of the wheel assembly 18 of the transport mode, which retracts the wheel/wheels 19, 21 of the wheel assembly of the right mobile assembly 2 and the left mobile assembly 2, respectively, such that the wheel/wheels 19, 21 of the wheel assembly assume a position within the contour of the front section 3 of the mobile assembly, the right mobile assembly 2 and the left mobile assembly 2, respectively, simultaneously lowering the front of the front section 3 of the mobile assembly, the right mobile assembly 2 and the left mobile assembly, respectively 2, causing the front section 2 of the mobile assembly, the right mobile assembly 2 and the left mobile assembly, respectively, to rest on a flat terrain on the track 9 by the front wheel 7 of the front section, of the right mobile assembly 2 and the left mobile assembly, respectively, as shown in Figs. 14 to 19 at particular stages. Furthermore, during the reconfiguration of the mobile device 1 into the stair mode, the cam 26 of the reconfiguration assembly is activated, causing the rear section 5 of the mobile assembly, the right mobile assembly 2 and the left mobile assembly 2, respectively, to rotate around the front wheel 15 of the rear section toward the back, as shown in Figs. 14 and 16 at particular stages and further upward to the position of climbing the first stair of a flight of stairs, as shown in Fig. 19. Reconfiguration of the mobile device 1 according to the invention from the transport mode to the stair mode, as described above, is realized by means of the control panel 51 of the control system, for example, by pressing a button on the control panel 51 for switching the mobile device 1 into the stair mode or by activating the pictogram on the programme interface on the digital device, representing the switching of the mobile device 1 into the stair mode. In the stair mode of the mobile device 1 with the wheelchair 100, the mobile device 1 rests on a flat terrain on the track 9 of the front section and on the track 13 of the middle section of the right mobile assembly 2 and the left mobile assembly 2, respectively, as shown in Fig. 19. In another embodiment, the mobile device 1 in the stair mode rests on a flat terrain by means of the wheel 19 of the wheel assembly and/or the additional wheel 21 of the wheel assembly of the right mobile assembly 2 and the left mobile assembly 2, respectively (not shown in the figures), for example, but not limited to, on a rocker.

[0057] In order to drive the wheelchair 100 on the mobile device 1 on stairs, the user, sitting in the seat 102 of the wheelchair, controls the power transmission assembly 46 of the right mobile assembly 2 and the left mobile assembly 2, respectively, to approach stairs backwards until the track 17 of the rear section of the right mobile assembly 2 and the left mobile assembly 2, respectively, touches the edge of the first stair of a flight of stairs, as shown in Fig. 22. Subsequently, the mobile device 1 climbs the first stair of a flight of stairs and further the consecutive stairs of the flight of stairs, as shown in Fig. 23. While moving on stairs, the seat 102 is automatically levelled by means of the seat levelling assembly 42 through extending and shortening the seat levelling assembly actuator 43, thus preventing the user from falling out of the wheelchair 100. In the embodiment, wherein the wheel 19 of the wheel assembly and/or the additional wheel 21 of the wheel assembly of the right mobile assembly 2 and the left mobile assembly 2, respectively, is mounted on a rocker, as described above, as they climb over the edge of a stair they oscillate up and down, thus preventing the lifting of the front wheel 7 of the front section of the right mobile assembly 2 and the left mobile assembly 2, respectively, of the mobile device 1. In the embodiment, wherein the wheel 19 of the wheel assembly can be moved such that it is within the contour of the front section 3 of the mobile assembly, as described above, during the movement of the mobile device 1 according to the invention with the wheelchair 100 according to the invention, the wheel 19 of the wheel assembly does not collide with stairs. As the mobile device 1 climbs over the edge of the last stair of a flight of stairs, the mobile device 1 rests on the staircase landing by the front part of the middle section 4 of the mobile assembly, the right mobile assembly 2 and the left mobile assembly 2, respectively, as shown in Fig. 24. After climbing over the last stair of a flight of stairs, the mobile device 1 according to the invention with the wheelchair 100 according to the invention starts to move on a flat terrain, that is, on the flat terrain behind stairs or a staircase landing. The mobile device 1 moves on a staircase landing in the configuration of the mobile device in the stair mode, as described above, wherein the seat 102 of the wheelchair is levelled by the seat levelling actuator 43. The movement of the wheelchair 100 in the stair mode on a staircase landing or when approaching consecutive stairs over short distances is realized by means of the control panel 51 of the control system, for example, by means of the joystick, by moving it in the direction in which the user intends to go on stairs, or by activating a pictogram on the programme interface on the digital device, representing the movement in the direction in which the user intends to go on stairs.

[0058] When the user has climbed stairs and there are no more stairs to climb or when the user does not intend to climb any more stairs, the mobile device 1 according to the invention is switched into the transport mode. In the transport mode, the mobile device 1 according to the invention has the configuration, as described in detail above. In order to reconfigure the mobile device 1 according to the invention from the stair mode to the transport mode, said activities are carried out in the reverse order, as described in detail above with regard to reconfiguring the mobile device 1 according to the invention from the transport mode to the stair mode. Reconfiguration of the mobile device 1 according to the invention from the stair mode to the transport mode is realized by means of the control panel 51 of the control system, for example, by pressing a button on the control panel 51 for switching the mobile device 1 into the transport mode or by activating the pictogram on the programme interface on the digital device, representing the switching of the mobile device 1 into the transport mode.

[0059] Where there is no need to use the mobile device 1 according to the invention with the wheelchair 100 according to the invention, the wheelchair can be logged out of the mobile device 1. Logging out, that is, disconnecting the wheelchair 100 from the mobile device starts when the mobile device 1 with the wheelchair 100 is in the transport mode, as described in detail above. In order to log the wheelchair 100 out of the mobile device 1, the above activities are carried out in the reverse order, as described in detail above with regard to logging the wheelchair 100 into the mobile device 1. However, in order to release the wheelchair 100 from the mobile device 1 configured in the transport mode, the hitch 44 of the seat levelling actuator is released, thus releasing the levelling assembly actuator 43 from the expander 108 of the wheelchair. In one of the embodiments, the hitch 44 of the seat levelling actuator is released by the user manually. In another embodiment, the hitch is released by the user by rotating the hitch shape with a handle following releasing the lock. In yet another embodiment, the hitch 44 of the seat levelling actuator is released by means of the control panel 51 of the control system, for example, by pressing a button on the control panel 51 for logging out the mobile device 1 or by activating the pictogram on the programme interface on the digital device, representing the logging out of the mobile device. Subsequently, the user of the wheelchair 100 according to the invention moves the lever 37 of the latch mechanism thus releasing the latch 36 of the latch mechanism of the right mobile assembly 2 and the left mobile assembly 2, respectively from the axle 106 of the main wheel of the right main wheel 104 and the left main wheel 104 of the wheelchair, respectively. The lever 37 of the latch mechanism of the right mobile assembly 2 and the left mobile assembly 2, respectively, can be moved following pressing the button 38 on the corresponding lever 37 of the latch mechanism. Alternatively, while logging the wheelchair 100 out of the mobile device 1, the user must first move the lever 37 of the latch mechanism thus releasing the latch 36 of the latch mechanism of the right mobile assembly 2 and the left mobile assembly 2, respectively, from the axle 106 of the main wheel of the right main wheel 104 and the left main wheel 104 of the wheelchair, respectively, as described above, and subsequently releases the hitch 44 of the seat levelling actuator, as described above. Finally, the user disconnects the control panel 51 of the control system and places it in the mobile device 1, as shown in Fig. 1, as a result of which, the mobile device 1 detects the logging out of the wheelchair 100 from the mobile device 1. In another embodiment, the logging out of the wheelchair 100 from the mobile device 1 is realized via wireless logging out of the programme of the digital machine from the controller assembly of the control system of the mobile device 1. In this mode, the wheelchair 100 is not coupled with any component of the mobile device 1 and the user drives out from between the mounting sections 29 of the mounting assembly by manually powering the main wheels 104 of the wheelchair. After the user drives the wheelchair out, the mobile device is in the idle mode, as shown in Figs. 1 to 4, and is ready for use again by logging into it the same or another wheelchair 100.

[0060] The term “terrain” as used herein is a support on which the mobile device 1 according to the invention may move as a result of the components of the mobile device 1 , in particular the tracks 9, 13, 17 of the mobile assemblies, the wheels 19, 21 of the wheel assembly and/or shock-absorbing wheels 24 of the shock- absorbing wheel assembly engaging the support. The term “terrain” as used herein includes a flat terrain and stairs. The term “flat terrain ’ as used herein refers to a flat surface on which the mobile device 1 and/or the wheelchair 100 is able to move. The term “flat terrain” as used herein refers but is not limited to a staircase landing, a building floor, a sidewalk, a road, a parking lot. The term “stairs” as used herein refers to an architectural element comprising at least one stair defining a difference between levels. The terms “stairs” as used herein refers but is not limited to one stair, two stairs, three stairs, a flight of stair, a curb.

[0061] The above-described mobile device 1 is described as comprising a mounting section 29 comprising a tip 31 with a latch mechanism 35 arranged within said tip 31, whereas the wheelchair 100 comprises axles 106 of the main wheel with a flange 107 arranged on the main wheels 104, respectively, and adapted for coupling with the latch mechanism 35 on the right mobile assembly 2 and the left mobile assembly 2, respectively. However, other components may be used on the mobile device 1 for coupling with the wheelchair 100 and other elements on the wheelchair 100 for coupling with the mobile device 1. For example, instead of the tip, the mounting section of the mobile device comprises a handle mounted on the arm of the mounting section. Whereas the wheelchair comprises caps mounted on the hubs of the main wheels of the wheelchair. The caps on the hubs of the main wheels are mounted in the axles of these main wheels of the wheelchair. The caps of the main wheels of the wheelchair cooperate with the handles of the arms of the mounting section of the mobile assemblies of the mobile device. The handles on the arms of the mounting section of the mobile device and the caps on the hubs of the main wheels of the wheelchair may be those disclosed in the Polish patent application No. PL 420785 A, whose content is attached herein entirely by way of a reference.

[0062] The invention was described above using the preferred embodiments only by way of example. Based on the above disclosure, a specialist will recognize that modifications, variants or equivalents are possible that fall within the spirit and the inventive intention of the present invention without exceeding the scope of the attached claims.

[0063] The features indicated in the above-described embodiments of the invention, especially the preferred ones, may be combined or replaced to any extent and in any way, whereby all new connections or combinations possible are deemed to be fully disclosed in the description of the present invention, unless they are mutually contradictory or exclusive.

REFERENCE NUMBERS LIST

[0064] 1 Mobile device for a wheelchair

2 Mobile assembly

3 Front section of the mobile assembly 2

4 Middle section of the mobile assembly 2

5 Rear section of the mobile assembly 2

6 Frame of the front section 3 of the mobile assembly

7 Front wheel of the front section 3 of the mobile assembly

8 Rear wheel of the front section 3 of the mobile assembly

9 Track of the front section 3 of the mobile assembly

10 Frame of the middle section 4 of the mobile assembly

11 Front wheel of the middle section 4 of the mobile assembly

12 Rear wheel of the middle section 4 of the mobile assembly

13 Track of the middle section 4 of the mobile assembly

14 Frame of the rear section 5 of the mobile assembly

15 Front wheel of the rear section 5 of the mobile assembly

16 Rear wheel of the rear section 5 of the mobile assembly

17 Track of the rear section 5 of the mobile assembly

18 Wheel assembly of the transport mode

19 Wheel of the wheel assembly 18 of the transport mode

20 Cam of the wheel assembly 18 of the transport mode

21 Additional wheel of the wheel assembly 18 of the transport mode

22 Shock-absorbing wheel assembly

23 Arm of the shock- absorbing wheel assembly

24 Shock-absorbing wheel

25 Reconfiguration assembly of the rear section 5 of the mobile assembly

26 Pull member of the reconfiguration assembly 25 of the rear section of the mobile assembly

27 Spring of the reconfiguration assembly 25 of the rear section of the mobile assembly

28 Mounting assembly of the mobile assembly 2

29 Mounting section of the mounting assembly 28

30 Arm of the mounting section 29

31 Tip of the mounting section 29

32 Front supporting pin

33 Rear supporting pin

34 Drive sleeve of the main wheel 35 Latch mechanism 35

36 Latch of the latch mechanism 35

37 Lever of the latch mechanism 35

38 Button of the lever 37 of the latch mechanism

39 Reconfiguration assembly of the front section and the middle section of the mobile assemblies

40 Lever assembly of the reconfiguration assembly 39

41 Reconfiguration assembly actuator 39

42 Seat levelling assembly

43 Seat levelling actuator

44 Hitch of the seat levelling actuator 43

45 Guide of the seat levelling guide actuator 43

46 Power transmission system of the mobile assembly

47 Propulsion of the mobile assembly

48 Power transmission system of the main wheel

49 Propulsion of the main wheel

50 Drive sleeve of the main wheel

51 Control panel

52 Battery

100 Wheelchair

101 Wheelchair frame

102 Wheelchair seat

103 Handle

104 Main wheel of the wheelchair

105 Front wheel of the wheelchair

106 Axle of the main wheel

107 Flange of the axle 106 of the main wheel

108 Expander