Description:FIELD OF THE INVENTION

[0001] The present invention relates to a dual-mode wheelchair accessibility system for a vehicle that is capable of incorporating an automated and adaptable ramp and lift means into personal and public vehicles to improve accessibility for wheelchair users and individuals handling wheeled loads.

BACKGROUND OF THE INVENTION

[0002] People who use wheelchairs face substantial difficulties when accessing conventional vehicles due to the difference of elevation between the ground and the vehicle’s floor. This vertical gap makes direct entry challenging, particularly for individuals who lack the physical strength or support to lift themselves or maneuver their wheelchair independently. In most conventional vehicles, the absence of integrated accessibility features such as ramps or lifts, further exacerbates the problem, often forcing wheelchair users to depend on external assistance, family members, or specialized modifications. The lack of built-in accessibility means not only limits mobility but also raises significant safety concerns. During the process of boarding, if the wheelchair is not securely positioned or if the user is transferred improperly, there is a high risk of falls, tipping, or injury.

[0003] Such risks cause physical discomfort and increase the anxiety associated with travel. Consequently, wheelchair users do experience reduced autonomy, as reliance on external help diminishes their ability to move freely and independently. Current assistances, including portable ramps or aftermarket lift systems, provide partial relief but are often cumbersome, time-consuming, or unsuitable for all vehicle types. These adaptations also require significant physical effort from the user or accompanying personnel, which undermines the convenience and independence that accessibility assistances are intended to provide. Moreover, inconsistent design standards across vehicles lead to usability challenges, making seamless, safe, and efficient boarding a persistent issue for wheelchair users. Given these limitations, there is a critical need for a fully integrated accessibility system that allows wheelchair users to board and disembark vehicles safely and independently. Such a system must not only improve convenience and user confidence but also enhance overall mobility, inclusivity, and quality of life for individuals who rely on wheelchairs for daily transportation.

[0004] Traditional methods of wheelchair accessibility assistance for vehicles primarily rely on portable ramps, foldable ramps, or mechanically operated lifts. These ramps are manually positioned to bridge the gap between the ground and the vehicle floor, while lifts operate using hydraulic or electric systems to raise the wheelchair. Though functional, these methods are often bulky, require physical effort or external assistance, and are not universally compatible with all vehicle types, limiting user independence. The main drawback of traditional wheelchair accessibility methods is their lack of user-friendliness and independence. Portable and foldable ramps are heavy, inconvenient to handle, and require considerable effort or external help for proper setup. Mechanical lifts, while effective, are expensive, prone to breakdowns, and require regular maintenance. Additionally, these means are not always compatible with every vehicle type, restricting flexibility and ease of use for wheelchair users.

[0005] US8398356B2 discloses a wheelchair lift and restraining device for an automotive vehicle includes a base pivotally mounted beneath the main floor of a vehicle. First and second support arm portions extend outwardly from the base and are configured for engagement with a wheelchair frame, preferably a wheel axle. A rotating assembly selectively moves the support arm through approximately 90° of rotation and the system is raised and lowered relative to the vehicle to transport the wheelchair from outside the vehicle to the interior of the vehicle, and also position the wheelchair at a desired height in the vehicle interior. Translation movement of the support arms also positions the wheelchair occupant at a desired location. A headrest extends from the system to provide desired neck and head support.

[0006] US5261779A discloses an improved dual hydraulic, parallelogram arm wheel chair lift assembly for use in commercial vehicles, such as vans or buses. The lift assembly includes a platform connected at one end to a pair of parallelogram linkages, each of which is provided with a power-up, gravity-down hydraulic cylinder for pulling the parallelogram linkages and platform from a lowered loading position to an immediate transfer position, and thence to a folded, generally upright stored position. The pulling action of the hydraulic cylinders with hydraulic fluid working on the rod side reduces side loading on the piston head and wear on pivot pins of the parallelogram linkages. The hydraulic cylinders are self-bleeding of air during gravity down operation to reduce spongy and jerky operation. The lift assembly has an improved base member employing an additional base support plate to form a box structure to increase strength and reduce moment-induced bending of the mounting plate. Tie downs are also provided to the side supports to assist in reducing sway movement of the side supports. An improved, highly precise micro switch trigger assembly mounted independent of arm pivot pins and large bearing surface fixed arm pivot pins are disclosed. The hydraulic cylinders are mounted base down and act at right angles to the conventional mounting scheme, with full extension at lower load position and fully closed (retracted) at the upper stowed position.

[0007] Conventionally, many systems have been developed for providing wheelchair accessibility assistance for a vehicle, but these existing systems lack in providing a multimodal means for assisting the wheelchair users and individuals handling wheeled loads to get inside the vehicle and also lack in monitoring the width of a user’s wheelchair and taking appropriate measures to ensure the smooth transfer of the wheelchair into the vehicle for preventing misalignment, obstruction, or potential damage to the wheelchair during entry. In addition, the existing systems fail in securing a vacant wheelchair after the user has transferred to a seat inside the vehicle for minimizing the space occupied by the wheelchair within the vehicle.

[0008] In order to overcome the aforementioned drawbacks, there exists a need in the art to develop a system that requires to be capable of capable of providing a multimodal means for assisting the wheelchair users and individuals handling wheeled loads to get inside the vehicle and also detecting the width of a user’s wheelchair and taking appropriate actions to ensure the smooth transfer into the vehicle for preventing misalignment, obstruction, or potential damage during entry. Furthermore, the developed system should be able to secure the wheelchair once the user has transferred to a seat inside the vehicle, minimizing the space occupied and ensuring safe storage within the vehicle.

OBJECTS OF THE INVENTION

[0009] The principal object of the present invention is to overcome the disadvantages of the prior art.

[0010] An object of the present invention is to develop a system that is capable of incorporating an automated and adaptable ramp and lift means, integrated within personal and public vehicles, to enhance accessibility for wheelchair users and individuals transporting wheeled loads.

[0011] Another object of the present invention is to develop a system that is capable of lifting the user’s wheelchair to align with a floor level of the vehicle, thereby facilitating smooth and convenient entry of the wheelchair into the vehicle.

[0012] Another object of the present invention is to develop a system that is capable of monitoring the width of a user’s wheelchair and accordingly taking appropriate measures to ensure the smooth transfer of the wheelchair into the vehicle, thus preventing misalignment, obstruction, or potential damage to the wheelchair during entry.

[0013] Yet another object of the present invention is to develop a system that is capable of automatically securing a vacant wheelchair after the user has transferred to a seat inside the vehicle, thereby minimizing the space occupied by the wheelchair within the vehicle.

[0014] The foregoing and other objects, features, and advantages of the present invention will become readily apparent upon further review of the following detailed description of the preferred embodiment as illustrated in the accompanying drawings.

SUMMARY OF THE INVENTION

[0015] The present invention relates to a dual-mode wheelchair accessibility system for a vehicle that is capable of lifting the user’s wheelchair to the level of the vehicle’s floor, thereby facilitating smooth and convenient entry of the wheelchair into the vehicle.

[0016] According to an aspect of the present invention, a dual-mode wheelchair accessibility system for a vehicle, comprises of a two-part gate composed of a first part and a second part connected in a hinged manner for securing the entrance of the vehicle, a control unit to enable operation of the two-part gate in a ramp mode and in a lift mode in accordance with an input for accessibility of a variety of wheelchair user, a sliding arrangement configured with the cabin to enable sliding of the two-part gate along a height of the entrance, along an inner floor of the cabin and a rotation of the two-part gate outwards towards a ground surface for positioning at an incline in the ramp mode, a plurality of hydraulic actuators arranged over the second part of the two-part gate to lift wheelchair positioned over the second part to bring in level with the floor of the cabin, for climbing into the cabin, in the lift mode, a securing arrangement installed with the second part of the two-part gate to secure the wheelchair over the second part in the lift mode.

[0017] According to another aspect of the present invention, a method for providing dual-mode accessibility to a wheelchair for boarding onto a vehicle, comprises of a two-part gate composed of a first part and a second part connected with one another in a hinged manner for securing the entrance of the vehicle, installing the two-part gate with the entrance by means of a sliding arrangement, receiving an input regarding selection between a ramp mode and a lift mode, activating the ramp mode by executing steps of sliding the two-part gate along a height of the entrance and rotating the two-part gate outwards towards a ground surface for positioning at an incline, operating the lift mode by executing steps of rotating the first part of the two-part gate downwards while rotating the second part of the two-part gate upwards for levelling the second part with ground surface, securing a wheelchair over the second part by means of a securing arrangement, raising the second part by extending a plurality of hydraulic actuators provided underneath the second part, for lifting the wheelchair, powering the motorised wheels to translate the two-part gate for an inward sliding into the cabin.

[0018] While the invention has been described and shown with particular reference to the preferred embodiment, it will be apparent that variations might be possible that would fall within the scope of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

[0019] These and other features, aspects, and advantages of the present invention will become better understood with regard to the following description, appended claims, and accompanying drawings where:
Figure 1 exemplarily illustrates an isometric view of a dual-mode wheelchair accessibility system for a vehicle;
Figure 2 exemplarily illustrates an isometric view of a sliding arrangement associated with the dual-mode wheelchair accessibility system for the vehicle;
Figure 3 exemplarily illustrates an isometric view of the dual-mode wheelchair accessibility system for the vehicle in a ramp mode;
Figure 4 exemplarily illustrates an isometric view of the dual-mode wheelchair accessibility system for the vehicle in a lift mode;
Figure 5 exemplarily illustrates an isometric view of a mounting unit associated with the dual-mode wheelchair accessibility system for the vehicle; and
Figure 6 exemplarily illustrates a flowchart of a method for providing dual-mode accessibility to a wheelchair for boarding onto a vehicle associated with the system.

DETAILED DESCRIPTION OF THE INVENTION

[0020] The following description includes the preferred best mode of one embodiment of the present invention. It will be clear from this description of the invention that the invention is not limited to these illustrated embodiments but that the invention also includes a variety of modifications and embodiments thereto. Therefore, the present description should be seen as illustrative and not limiting. While the invention is susceptible to various modifications and alternative constructions, it should be understood, that there is no intention to limit the invention to the specific form disclosed, but, on the contrary, the invention is to cover all modifications, alternative constructions, and equivalents falling within the spirit and scope of the invention as defined in the claims.

[0021] In any embodiment described herein, the open-ended terms "comprising," "comprises,” and the like (which are synonymous with "including," "having” and "characterized by") may be replaced by the respective partially closed phrases "consisting essentially of," consists essentially of," and the like or the respective closed phrases "consisting of," "consists of, the like.

[0022] As used herein, the singular forms “a,” “an,” and “the” designate both the singular and the plural, unless expressly stated to designate the singular only.

[0023] The present invention relates to a dual-mode wheelchair accessibility system for a vehicle that is capable of detecting the width of a user’s wheelchair and accordingly taking appropriate measures to ensure the smooth transfer of the wheelchair into the vehicle for preventing misalignment, obstruction, or potential damage to the wheelchair during entry.

[0024] Referring to Figure 1, an isometric view of a dual-mode wheelchair accessibility system for a vehicle is illustrated, comprising a two-part gate 101 composed of a first part 102 and a second part 103, a sliding arrangement 104 configured with the cabin, a plurality of ultrasonic sensors 105 embedded over the two-part gate 101, a plurality of proximity sensors 106 embedded in the two-part gate 101, a presence sensor 107 installed with two-part gate 101, a clamp 108 provided over each lateral edge of the second part 103, a hinged bar 109 positioned within a slot 110 embedded in the second part 103, each of the clamps 108 is attached with the lateral edge of the second part 103 by means of a vertical telescopic pole 111, a mounting unit 112 installed within the cabin.

[0025] . The present system is designed for a vehicle that comprises of a cabin with an entrance to accommodate passengers and a seat within the cabin for sitting of the passengers. The system described in this invention is capable of being integrated with a wide range of vehicles, including but not limited to passenger cars, minivans, buses, and ambulances. The system is capable of being implemented in vehicles used for public transportation, private fleet services, or specialized transport systems catering to passengers with mobility challenges, thus providing a flexible and adaptable means, enabling wheelchair users to board and disembark from vehicles safely and comfortably, regardless of the type of vehicle.

[0026] The system disclosed herein employs the two-part gate 101 composed of the first part 102 and the second part 103. The default positioning of the two-part gate 101 with respect to the vehicle is such that both the first part 102 and the second part 103 are aligned vertically to secure the entrance of the vehicle when not in use. The first part 102 and second part 103 of the two-part gate 101 are positioned within the frame of the entrance of the vehicle, ensuring the cabin of the vehicle remains sealed and protected.

[0027] The first part 102 and the second part 103 are connected with one another in a hinged manner for securing the entrance of the vehicle by means of a hinge joint. The hinge joint, connecting the first part 102 and second part 103 of the two-part gate 101, operates as a pivotal arrangement that allows controlled angular movement between the two sections.

[0028] Internally, the hinge joint comprises a central pin or shaft fixed to the first part 102 of the two-part gate 101, around which the second part 103 rotates smoothly. When the two-part gate 101 is in operation, the automated arrangement applies a force that causes the second part 103 to pivot around the hinge joint axis. The automated arrangement uses an electric motor, connected to the hinge joint of the two-part gate 101. When activated, the motor applies torque via gears to pivot the second part 103 around the central pin.

[0029] The hinge joint includes bearings around the pin to reduce friction, ensure smooth motion, and absorb minor shocks during movement. This design ensures that the first part 102 and the second part 103 move in a synchronized manner, providing a stable, secure closure when the two-part gate 101 is shut and a controlled, fluid motion when opening, thereby facilitating the safe transfer of a wheelchair into the vehicle.

[0030] In an embodiment of the present invention, the first part 102 of the two-part gate 101 is configured with a drawer arrangement for extension or retraction of the two-part gate 101. The drawer arrangement allows the two-part gate 101 to adjust in size, helping the two-part gate 101 to match different angles and accommodate varying ground lengths. This adaptability ensures that the two-part gate 101 is extended or retracted to align with the specific angle of the ground, whether inclined or levelled. The drawer arrangement consists of a drawer that slides on the rails inside the first part 102. These rails provide a smooth and stable path for the compression and expansion of the two-part gate 101.

[0031] When a control unit actuates the drawer arrangement, the motor starts rotating and the rotational motion is converted into linear motion through the use of gears. As the motor rotates, the drawer moves either outward or inward along the sliding rails. This expansion and compression increase and decreases the size of the two-part gate 101.

[0032] Referring to Figure 2, an isometric view of a sliding arrangement associated with the dual-mode wheelchair accessibility system for the vehicle is illustrated, comprising a pair of sliding tracks 201 provided vertically along the entrance, a pair of carriages 202 translating along the sliding tracks 201, the two-part gate 101 is connected with the carriages 202 by means of pin joints 203.

[0033] Referring to Figure 3, an isometric view of the dual-mode wheelchair accessibility system for the vehicle in a ramp mode is illustrated, comprising a cascading slider 301 attaching the seat within the cabin, a two-panel sliding configuration consists of a fixed panel 302 and a movable panel 303.

[0034] The control unit enables the operation of the two-part gate 101 in a ramp mode and in a lift mode, in accordance with an input. The ramp mode and the lift mode are used for accessibility of a variety of wheelchair users. The control unit is responsible for managing the operation of the two-part gate 101, enabling to switch between the ramp mode and the lift mode based on user input. The control unit is an Arduino Uno, a versatile microcontroller board. The Arduino Uno receives the user’s input and, based on the selected mode, activates the electric motors or actuators to move the two-part gate 101. The sliding arrangement 104 is attached to the cabin that enables the sliding of the two-part gate 101 along a height of the entrance, along an inner floor of the cabin and a rotation of the two-part gate 101 outwards towards a ground surface for positioning at an incline in the ramp mode.

[0035] The sliding arrangement 104 includes the pair of sliding tracks 201 that is provided vertically along the entrance and extending along the floor of the cabin, the pair of carriages 202 translating along the sliding tracks 201. One carriage 202 is coupled with each of the sliding tracks 201. The two-part gate 101 is rotatably connected with the pair of carriages 202 for a rotation of the two-part gate 101 outside of a plane of the entrance.

[0036] The pair of sliding tracks 201 is mounted vertically along the entrance and extend along the floor of the cabin. These sliding tracks 201 are designed to guide the carriages 202 along with the two-part gate 101, ensuring smooth and stable sliding motion. The sliding tracks 201 are grooved to accommodate the rollers of the carriages 202, providing low-friction surfaces for easy translation.

[0037] The sliding tracks 201 are fixed securely to the cabin’s structure, creating a predetermined path for the carriages 202 to follow. When the two-part gate 101 is operated, the carriages 202 move vertically along these sliding tracks 201, ensuring the two-part gate 101 is adjusted to the desired position. The sliding tracks 201 help to maintain the alignment of the two-part gate 101 during movement, preventing misalignment or instability as the two-part gate 101 transitions from a vertical position to an inclined one.

[0038] Each carriage 202 is coupled with one of the sliding tracks 201, designed to move along the sliding tracks 201 while supporting the weight of the two-part gate 101. The carriages 202 contain motorised rollers that fit within the sliding tracks 201, allowing them to smoothly translate in an up-and-down motion. When the two-part gate 101 is operated, the carriages 202 slide in response to the input, moving the two-part gate 101 vertically.

[0039] The motion of the carriages 202 is carefully controlled to ensure that the two-part gate 101 is rotated outside the plane of the entrance, transitioning smoothly into an inclined position. The carriages 202 support the weight of the two-part gate 101, distributing the force evenly to prevent wobbling and maintain stability during the movement of the two-part gate 101.

[0040] The two-part gate 101 is connected with the carriages 202 by means of the pin joints 203 for the rotation of the two-part gate 101 outside of a plane of the entrance towards the ground surface for positioning at an incline in the ramp mode. The pin joints 203 connecting the two-part gate 101 to the carriages 202 function as rotational pivots that allow the two-part gate 101 to move out of the vertical plane of the vehicle entrance and align with the ground surface when deployed in ramp mode.

[0041] Internally, each pin joint 203 consists of a cylindrical pin inserted through aligned holes in the two-part gate 101 and the carriage 202, forming a secure axis of rotation. The pin joints 203 are automatically actuated for enabling precise control over rotational movement of the two-part gate 101. Using a motorised unit, the pin joints 203 are activated to rotate the two-part gate 101 smoothly from the closed, vertical position to an inclined position. The applied force on the two-part gate 101 causes the two-part gate 101 to rotate smoothly around the pin, transitioning from a closed, vertical position to an inclined position that bridges the vehicle floor and the ground. The pin is supported with bearings to reduce friction, enable precise movement, and absorb minor shocks during deployment or retraction.

[0042] The bearings used in the pin joints 203 reduce friction by providing a smooth, low-resistance surface between the rotating parts, the pin and the carriage 202. The pin is inserted through aligned holes in the two-part gate 101 and the carriage 202, forming a pivot point. The bearings are positioned around the pin where it interfaces with the holes in the carriage 202. These bearings act as a buffer, allowing the pin to rotate with minimal contact between the pin and the surrounding metal surfaces.

[0043] The rolling elements inside the bearings allow the pin to turn smoothly, rather than sliding against the carriage 202 material. This rolling action significantly reduces the friction compared to direct metal-to-metal contact, making the rotation smoother, more efficient, and requiring less force to initiate and sustain. Additionally, the bearings help absorb minor shocks and vibrations during the deployment or retraction of the two-part gate 101, preventing wear and tear on the pin and carriage 202 and prolonging the system's operational life.

[0044] In an embodiment of the present invention, the pin is supported with bushings to reduce friction. The bushings fit around the pin and are inserted into the aligned holes of both the two-part gate 101 and the carriage 202. These bushings act as a buffer between the rotating pin and the surrounding metal surfaces, reducing friction by preventing direct contact between the pin and the hole.

[0045] This allows the pin to rotate smoothly, without the resistance that would occur from metal-on-metal friction. The bushing material, such as bronze, brass, or self-lubricating composites, provides additional benefits. Self-lubricating bushings release solid lubricants like PTFE or graphite during movement, ensuring a consistent low-friction surface. This reduces the need for external lubrication while maintaining smooth operation. The bushings also absorb shocks and vibrations during deployment or retraction, thus preventing wear.

[0046] A downward gap is provided at a vertex of each of the sliding tracks 201. The downward gap enables the sliding of the two-part gate 101 outwards from the sliding tracks 201 onto the ground surface. The downward gap at the vertex of each sliding track 201 serves as a transition zone that allows the two-part gate 101 to slide smoothly outwards from the sliding tracks 201 and onto the ground surface. Internally, as the two-part gate 101 moves along the sliding tracks 201, it reaches the vertex where the downward gap provides a controlled drop in elevation.

[0047] This design ensures that the two-part gate 101 transitions from the vehicle’s horizontal plane to an inclined position without obstruction or abrupt movement. The gap is dimensioned to accommodate the thickness and width of the two-part gate 101, enabling stable engagement while preventing misalignment. By guiding the two-part gate 101 along this path, the downward gap facilitates the deployment in ramp mode, ensuring a smooth, safe, and reliable interface between the vehicle floor and the ground for wheelchair boarding.

[0048] Referring to Figure 4, an isometric view of the dual-mode wheelchair accessibility system for the vehicle in a lift mode is illustrated, comprising a plurality of hydraulic actuators 401 arranged over the second part 103, a motorised wheel 402 disposed at a bottom end of each of the hydraulic actuators 401.

[0049] The two-part gate 101 slides outward towards the ground from the default mode, just similar to the ramp mode, for engaging into the lift mode. The plurality of hydraulic actuators 401 is positioned over the second part 103 of the two-part gate 101. These hydraulic actuators 401 are used to lift the wheelchair that is positioned over the second part 103 to bring the two-part gate 101 in level with the floor of the cabin. The two-part gate 101 is brought in the level of the floor of the cabin for climbing into the cabin, in the lift mode.

[0050] The hydraulic actuators 401 utilize a hydraulic unit for the operation. The hydraulic unit comprises a reservoir, a hydraulic pump, control valves, and pressure lines. When the operation is initiated via a control signal, the hydraulic pump draws fluid from the reservoir and pressurizes it. This pressurized hydraulic fluid is then directed through control valves toward the hydraulic actuators 401 positioned under the second part 103 of the two-part gate 101.

[0051] Each hydraulic actuator 401 contains a piston within a sealed cylinder, as the pressurized fluid enters the lower chamber of the hydraulic actuator 401, it pushes the piston upward, generating a lifting force. This upward motion raises the second part 103 of the two-part gate 101, along with the wheelchair placed on it, until it aligns with the floor level of the cabin.

[0052] The control valves regulate the flow and pressure of the fluid to ensure synchronized movement among all the hydraulic actuators 401, preventing tilt or imbalance. Once the desired height is reached, the valves lock the fluid in place to maintain the position. To lower the two-part gate 101, the valves are reconfigured to allow the fluid to return to the reservoir, enabling controlled descent.

[0053] In an embodiment of the present invention, a plurality of pneumatic actuators is used herein for the lifting of the wheelchair that is positioned over the second part 103. The pneumatic actuators utilize a pneumatic unit for the operation. The pneumatic unit consists of an air compressor, an air reservoir (tank), control valves, air filters, regulators, and pressure lines connecting to the pneumatic actuators.

[0054] When the lift mode is initiated through a control signal, the air compressor draws in atmospheric air, compresses the air, and stores the compressed air in the air reservoir. From here, regulated, pressurized air is directed via solenoid-operated control valves to the pneumatic actuators located under the second part 103 of the two-part gate 101.

[0055] Each pneumatic actuator contains a cylinder with a piston inside. As the compressed air is introduced into the lower chamber of the cylinder, it forces the piston upward due to the air pressure, producing a vertical lifting force. This causes the second part 103 of the two-part gate 101, along with the wheelchair, to rise smoothly until it reaches the same level as the cabin floor. The control valves carefully regulate the airflow and pressure to all the pneumatic actuators simultaneously to ensure uniform, balanced elevation, preventing any tilt or instability during lifting.

[0056] In another embodiment of the present invention, a plurality of electromechanical actuators is used herein for the lifting of the wheelchair that is positioned over the second part 103. The electromechanical actuators used herein utilizes an electromechanical arrangement, which converts the electrical energy into precise mechanical motion. These electromechanical actuators consist of electric motors coupled with mechanical components such as gears that drive the extension and retraction of the electromechanical actuators. The mechanical movement generated by these components is transferred to the electromechanical actuators, which are connected to the second part 103 of the two-part gate 101.

[0057] The motorised wheel 402 is provided at a bottom end of each of the hydraulic actuators 401. The motorised wheel 402 enables an inward sliding of the two-part gate 101 for boarding of the wheelchair in the lift mode. The motorised wheel 402 plays a critical role in enabling the inward sliding motion of the two-part gate 101 during the lift mode, allowing for smooth boarding of the wheelchair. Internally, each motorised wheel 402 consists of an electric motor integrated with a gearbox, a drive shaft, and a traction wheel.

[0058] When the inward sliding operation is triggered, electrical power is supplied to the motor, which converts electrical energy into rotational mechanical energy. The gearbox regulates the torque and speed of the motor output, optimizing it for controlled movement. This rotational energy is transmitted through the drive shaft to the traction wheel, which is in direct contact with the surface beneath the two-part gate 101. As the motorised wheels 402 rotate, they drive the entire two-part gate 101 structure inward. This allows the two-part gate 101, with the mounted hydraulic actuators 401 and wheelchair, to smoothly slide inward for alignment with the cabin during boarding.

[0059] A securing arrangement is mounted with the second part 103 of the two-part gate 101. The securing arrangement is employed to secure the wheelchair over the second part 103 in the lift mode. The securing arrangement includes a pair of stoppers that is provided towards an outward edge of the second part 103. Each of the stoppers consists of the hinged bar 109 that is positioned within the slot 110, embedded in the second part 103, rotated to be positioned in a vertical orientation to prevent the wheelchair from rolling back, in the lift mode.

[0060] Internally, the slot 110 is recessed into the second part 103 and dimensioned to fully accommodate the hinged bar 109 in a horizontal, retracted position when not in use. The hinged bar 109 is connected to the slot 110 via a pivot arrangement, allowing it to rotate upwards. When the lift mode is activated and the wheelchair is positioned, an actuator assembly rotates the hinged bar 109 upward into a vertical position, protruding above the second part 103 surface. In this position, the hinged bar 109 acts as a physical barrier behind the wheelchair's rear wheels, securing it in place by preventing backward movement.

[0061] The securing arrangement further includes the clamp 108 that is provided over each lateral edge of the second part 103 for engaging with a hub of a wheel of the wheelchair. The clamp 108 works by using an electric motor connected to a sliding jaw via a screw. The motor provides power to the screw that is attached to the fixed frame of the clamp 108. As the screw rotates, it pushes or pulls the sliding jaw towards or away from the fixed jaw, depending on the direction of rotation. This movement allows the clamp 108 to engage with the hub of the wheel of the wheelchair.

[0062] Each of the clamps 108 is attached to the lateral edge of the second part 103 by means of the vertical telescopic pole 111. In a preferred embodiment of the present invention, the vertical telescopic pole 111 is operated through a pneumatic unit. The pneumatic unit utilizes compressed air for the operation. The pneumatic unit is simpler, lighter, and requires smaller components, making it more suitable for integration into vehicle-mounted accessibility systems without adding excessive weight. The pneumatic units are generally less expensive as compared to the alternatives. They offer quick, reliable actuation with fewer complex components, reducing both initial cost and long-term maintenance expenses.

[0063] In another embodiment of the present invention, the vertical telescopic pole 111 is operated through a hydraulic unit. The hydraulic unit utilizes pressurized fluid (usually oil) for the operation. The hydraulic unit generates significantly higher force as compared to the alternatives, making it ideal for lifting or holding heavier loads. The hydraulic unit is robust and better suited for continuous or heavy-duty operations and is able to withstand shock loads and harsh working conditions more effectively.

[0064] In another embodiment of the present invention, the vertical telescopic pole 111 is operated through an electromechanical arrangement, which operates using an electric motor coupled with a screw drive such as a lead screw, ball screw, or rack-and-pinion. The electromechanical arrangement operates cleanly without fluids that reduce servicing needs and ensure a more user-friendly, low-maintenance setup. The electromechanical arrangement consumes energy only during motion and is easily programmed for automated or adaptive operations as compared to the alternatives.

[0065] The plurality of proximity sensors 106 is positioned in the two-part gate 101 for detecting an alignment of the wheelchair over the two-part gate 101. The proximity sensors 106 use inductive sensing to detect the alignment of the wheelchair over the two-part gate 101. The inductive proximity sensors 106 work by generating an electromagnetic field through a coil of wire inside the proximity sensor 106. When a metal object, such as the wheelchair's frame or certain parts of the wheels, enters the detection range of proximity sensor 106, it disrupts the electromagnetic field, causing a change in the electrical current of proximity sensor 106.

[0066] This change is detected by the internal circuit of the proximity sensor 106, which then sends a signal to the control unit. The proximity sensor 106 detects the presence and position of the wheelchair based on the strength and timing of the disruption in the electromagnetic field, allowing the system to determine whether the wheelchair is properly aligned over the two-part gate 101. The alignment of the wheelchair over the two-part gate 101 is detected to cause the securing arrangement to secure the wheelchair.

[0067] In an embodiment of the present invention, an imaging unit works in synchronization with the proximity sensors 106 to deliver a more precise result. While the proximity sensors 106 detect the presence and alignment of the wheelchair by measuring disruptions in the electromagnetic field, the imaging unit provides a visual verification of the wheelchair's position. By capturing real-time images or video of the two-part gate 101 area, the imaging unit enhances the data of the proximity sensors 106 by confirming the wheelchair’s exact placement relative to the two-part gate 101.

[0068] For example, the imaging unit uses cameras with computer vision protocols to assess the wheelchair's alignment more accurately, compensating for any possible interference or misalignment that the proximity sensors 106 alone do not fully capture. The imaging unit also helps to track the wheelchair's movement, providing continuous feedback to the control unit.

[0069] The cascading slider 301 attaches the seat within the cabin. The cascading slider 301 facilitates a backward sliding of the seat for accommodating the wheelchair in lift mode. The cascading slider 301 consists of a two-panel sliding configuration. The two-panel sliding configuration of the cascading slider 301 operates through a track-and-roller arrangement that allows smooth, controlled movement of the seat within the cabin. The two-panel sliding configuration consists of the fixed panel 302 and the movable panel 303, one fixed to the seat base and the other attached to the cabin floor.

[0070] The fixed panel 302 and the movable panel 303 are designed to slide along a set of parallel tracks, which are embedded within the seat frame. The fixed panel 302 and the movable panel 303 are equipped with rollers that sit within the tracks, reducing friction and enabling smooth sliding. When the seat is moved backward to accommodate the wheelchair in lift mode. This force moves the fixed panel 302 along the track, pulling the seat rearward while the movable panel 303 slides in tandem. The fixed panel 302 and the movable panel 303 work together to ensure the seat slides uniformly, maintaining stability and alignment, and providing sufficient space for the wheelchair to fit in place.

[0071] The plurality of ultrasonic sensors 105 is embedded over the two-part gate 101 for detecting the width of the wheelchair. The plurality of ultrasonic sensors 105 is important for enabling accurate and comprehensive measurement of the wheelchair’s width. A single ultrasonic sensor 105 is capable of detecting distance at one point only, but multiple ultrasonic sensors 105 positioned across the two-part gate 101 capture data from several lateral points, accounting for variations in wheelchair shape. This arrangement improves precision, reduces the risk of errors from irregular reflections, and ensures reliable detection under different conditions. The combination is implemented by linking all the ultrasonic sensors 105 to the control unit, which processes and correlates their readings to compute the overall width.

[0072] The ultrasonic sensors 105 work based on the principle of time-of-flight measurement. Each ultrasonic sensor 105 emits a high-frequency sound wave (ultrasonic pulse) from the transmitter. When the pulse encounters an object, such as the sides of the wheelchair, it reflects back towards the receiver of the ultrasonic sensor 105.

[0073] The ultrasonic sensor 105 measures the time taken for the pulse to travel from the transmitter to the object and back to the receiver. By knowing the speed of sound in the air, the ultrasonic sensor 105 calculates the distance between the ultrasonic sensor 105 and the wheelchair. Multiple ultrasonic sensors 105, positioned along the two-part gate 101, measure the distance at different points across the wheelchair’s width. The system then uses these measurements to determine the overall width of the wheelchair. The width of the wheelchair is detected to cause the control unit to actuate the cascading slider 301 to translate the seat rearwards if the width of the wheelchair exceeds a predefined width of the space in front of the seat.

[0074] In an embodiment of the present invention, an imaging unit works in synchronization with the ultrasonic sensors 105 to deliver more precise results. While ultrasonic sensors 105 measure the distance between the ultrasonic sensor 105 and the wheelchair’s sides based on time-of-flight, they sometimes have limitations in accuracy, especially in irregularly shaped objects or environments with background noise.

[0075] The imaging unit, such as a camera, provides visual data that complements the ultrasonic measurements. The imaging unit helps to identify the exact contours of the wheelchair and even detect any obstructions or anomalies that ultrasonic sensors 105 might miss. For example, the imaging unit maps the wheelchair's position and shape, while the ultrasonic sensors 105 offer real-time distance measurements. Together, the system improves the accuracy by cross-referencing the visual data with the ultrasonic distances, providing a more reliable measurement of the wheelchair's width.

[0076] A layer of a friction material is applied over the two-part gate 101 for providing a grip between the wheels of the wheelchair and the two-part gate 101. In an embodiment of the present invention, the friction material used herein is a non-slip Polyvinyl Chloride (PVC). The non-slip Polyvinyl Chloride (PVC) is a versatile and durable material often used as a friction surface due to its excellent slip resistance properties. The non-slip Polyvinyl Chloride (PVC) is textured to enhance grip, providing a stable and secure surface for the wheels of the wheelchair to interact with. PVC has inherent strength and flexibility, which makes it resistant to wear and tear, ensuring long-term durability even under constant pressure from the wheelchair wheels.

[0077] Additionally, non-slip PVC is resistant to moisture, oils, and various chemicals, making it ideal for environments where the surface is exposed to different elements. The non-porous nature also helps to prevent the accumulation of dirt and grime, which otherwise reduces its friction performance. When applied over the two-part gate 101, the Non-slip PVC creates a reliable, low-maintenance surface that enhances safety by preventing slippage during the loading and unloading of the wheelchair.

[0078] In another embodiment of the present invention, the friction material used herein is a nitrile rubber. The nitrile rubber, also known as Buna-N, is a synthetic rubber widely used as a friction material due to its excellent grip and resilience. This material is known for the high resistance to wear, oils, fuels, and chemicals, making it ideal for applications where exposure to such substances is common. When used on the two-part gate 101 surface, nitrile rubber provides a strong, durable grip between the wheelchair wheels and the two-part gate 101, ensuring stability during loading and unloading.

[0079] The rubber composition allows for a firm yet flexible grip, minimizing slippage while maintaining the integrity under heavy pressure or frequent use. The nitrile rubber also performs well in both high and low temperatures, making it suitable for various environmental conditions. The resistance to abrasion of the nitrile rubber further extends the lifespan of the friction surface, ensuring long-term safety and efficiency in the system. Overall, the nitrile rubber provides an effective, low-maintenance means for enhancing traction and ensuring the wheelchair remains securely in place during operation.

[0080] In another embodiment of the present invention, the friction material used herein is a silicone rubber. The silicone rubber is a highly durable, flexible material known for its excellent grip and resistance to extreme environmental conditions, making it an ideal choice for friction applications like the one described above. When used as a friction material on the two-part gate 101, silicone rubber provides a non-slip surface that ensures a firm grip between the wheelchair wheels and the two-part gate 101, reducing the likelihood of slippage during loading and unloading.

[0081] One of the key advantages is the ability to withstand a wide range of temperatures, from very low to very high, without losing the elasticity or grip. The silicone rubber is also highly resistant to weathering, UV radiation, ozone, and moisture, which enhances its performance in outdoor or harsh environments. Additionally, the silicone rubber is non-porous, which helps prevent dirt and grime buildup, ensuring consistent friction over time. The soft yet resilient nature of silicone rubber also helps protect the wheelchair wheels from wear, offering a smooth yet secure surface that enhances safety and stability during use.

[0082] Referring to Figure 5, an isometric view of a mounting unit in the dual-mode wheelchair accessibility system for the vehicle is illustrated, comprising a frame 501 attached within an enclosure 502 provided with an inner surface of the cabin, the frame 501 provided with a plurality of extendable grippers 503, the extendable grippers 503 mentioned herein comprises of an extendable link 504 and a clipper 505.

[0083] The mounting unit 112 is installed within the cabin to secure a vacant wheelchair. The mounting unit 112 includes the frame 501 that is attached within the enclosure 502, provided with an inner surface of the cabin. The frame 501 is provided with the plurality of extendable grippers 503 to grip the wheelchair. In a preferred embodiment of the present invention, the extendable grippers 503 mentioned herein comprises of the extendable link 504 and the clipper 505 that is attached to the extendable link 504. The extendable link 504 is segmented into two parts and allows the clippers 505 to secure the vacant wheelchair by extending and retracting using nested sections that slide within each other, driven by a pneumatic unit.

[0084] The pneumatic unit for extension and retraction operates using compressed air to drive a piston inside a cylinder. When air is supplied to one side of the piston, it creates pressure that pushes the piston rod outward, causing extension. To retract, air is supplied to the opposite side while the initial chamber is vented, pulling the piston rod back. The clipper 505 operates by using an electric motor to control the clipping fingers. When powered, the motor drives a mechanical linkage to open or close the fingers of the clipper 505, allowing precise clipping of the vacant wheelchair.

[0085] The presence sensor 107 is positioned on the two-part gate 101 to detect the presence of the wheelchair over the two-part gate 101 and an absence thereof. The presence sensor 107 is a load cell that is embedded in the two-part gate 101 to detect weight over the two-part gate 101, thus indicating the presence of the wheelchair. The load cell used as the presence sensor 107 in the two-part gate 101 operates based on the principle of strain gauge technology. The load cell is embedded in the two-part gate 101 and contains a series of strain gauges that are bonded to a metal structure, such as an aluminum. When a weight, like the wheelchair, is placed over the two-part gate 101, the force of the weight causes the metal structure to slightly deform or bend.

[0086] This deformation leads to a change in the resistance of the strain gauges, which are sensitive to this strain. The strain gauges are connected to a Wheatstone bridge circuit, which detects these small changes in resistance and converts them into an electrical signal. This electrical signal is then processed by the control unit, indicating the presence of the wheelchair when the weight surpasses a predefined threshold. The load cell accurately detects the presence or absence of the wheelchair by monitoring these resistance changes. The detection of the presence and absence of the wheelchair over the two-part gate 101 enables the control unit to safely execute the ramp mode and the lift mode.

[0087] A control panel in operative communication with the control unit receives input regarding the selection between the ramp mode and the lift mode. The control panel functions as a user interface that is inbuilt in a computing unit that allows the user to select between the ramp mode and the lift mode. The user input commands through the keyboard or touch interactive display panel of the computing unit, that is transmitted to the control unit through a communication module. The control panel is structured as the compact computing unit featuring the touch interactive display for ramp or lift mode selection, along with physical push buttons for emergency stop, reset, and power functions. Additional navigation buttons assist in menu access, while indicator LEDs display operational status, errors, or readiness.

[0088] The communication module includes, but not limited to Wi-Fi (Wireless Fidelity) module, Bluetooth module, GSM (Global System for Mobile Communication) module. The Wi-Fi module contains transmitters and receivers that use radio frequency signals to transmit data wirelessly to the control unit. The wireless module includes components such as antennas, amplifiers, and processors to facilitate communication and further connected to networks such as Wi-Fi, Bluetooth, or cellular networks, allowing systems to exchange information over short or long distances.

[0089] Referring to Figure 6, a flowchart of a method for providing dual-mode accessibility to a wheelchair for boarding onto a vehicle associated with the system is illustrated.

[0090] The dual-mode wheelchair accessibility system for the vehicle includes the method for providing dual-mode accessibility to a wheelchair for boarding onto a vehicle includes the following steps. The system begins with a two-part gate 101 consisting of a first part 102 and a second part 103, which are connected in a hinged manner. This two-part gate 101 is designed to secure the vehicle entrance, allowing it to either block or provide access. The hinge arrangement between the first part 102 and the second part 103 ensures flexibility in how the two-part gate 101 functions. The two-part gate 101 acts as the key component in controlling both ramp and lift modes for wheelchair accessibility, providing versatility in different boarding scenarios.

[0091] The next step is installing the two-part gate 101 with the entrance by means of a sliding arrangement 104. The two-part gate 101 is installed at the vehicle's entrance using the sliding arrangement 104, allowing it to move along a sliding track 201. This sliding arrangement 104 ensures that the two-part gate 101 easily shifts position depending on the mode being used. This sliding arrangement 104 adds a layer of functionality to the two-part gate 101, enabling it to transition between the ramp and lift modes smoothly, depending on user input. The sliding feature is essential for proper alignment of the two-part gate 101 in both configurations.

[0092] Further, an input is being received regarding the selection between a ramp mode and a lift mode. At this stage, the system receives an input regarding the mode selection, either ramp mode or lift mode. The input step is crucial for determining how the two-part gate 101 will function, whether the two-part gate 101 will be positioned to act as a ramp or as a platform lift to elevate the wheelchair to the vehicle's interior. This allows users to choose the most appropriate boarding method based on their needs.

[0093] Then the next step is activating the ramp mode by executing steps of sliding the two-part gate 101 along a height of the entrance and rotating the two-part gate 101 outwards towards a ground surface for positioning at an incline. In ramp mode, the two-part gate 101 is adjusted to function as a slope to allow the wheelchair to move onto the vehicle easily. The first action is to slide the two-part gate 101 along the height of the vehicle’s entrance.

[0094] This action positions the two-part gate 101 in a way that it transitions from a vertical position to a slope. Once in position, the two-part gate 101 is rotated outward toward the ground surface, where the two-part gate 101 is positioned at an incline, creating a smooth, accessible path for the wheelchair to roll up. The ramp mode allows the wheelchair user to directly drive up into the vehicle, providing a gentle, stable slope that facilitates easy boarding.

[0095] The two-part gate 101 is further operated in the lift mode by executing the steps of rotating the first part 102 of the two-part gate 101 downwards while rotating the second part 103 of the two-part gate 101 upwards for levelling the second part 103 with the ground surface and securing a wheelchair over the second part 103 by means of a securing arrangement.

[0096] The method further includes the raising the second part 103 by extending a plurality of hydraulic actuators 401 that is provided underneath the second part 103, for lifting the wheelchair and powering the motorised wheels 402 to translate the two-part gate 101 for an inward sliding into the cabin. In lift mode, the two-part gate 101 operates differently, as the goal is to lift the wheelchair to a level height for easier entry into the vehicle. This process starts with the rotation of the first part 102 of the two-part gate 101 downwards, while simultaneously rotating the second part 103 upwards.

[0097] This creates a platform-like surface, with the second part 103 leveling with the ground to provide a stable base for the wheelchair. Once the two-part gate 101 is positioned correctly, the wheelchair is secured onto the second part 103 through a securing arrangement. To raise the wheelchair into the vehicle, the plurality of hydraulic actuators 401 beneath the second part 103 of the two-part gate 101 are activated, extending to lift the wheelchair.

[0098] The lifting arrangement ensures that the wheelchair is elevated to the required height. After lifting, the system powers the motorised wheels 402 of the two-part gate 101 to enable it to slide inward, guiding the wheelchair into the vehicle’s cabin. This method ensures that the wheelchair is safely and efficiently transported into the vehicle.

[0099] For supplying power to electrical and electronically operated components, a battery is associated with the system. The battery powers electrical and electronic components by converting stored chemical energy into electrical energy. The battery’s terminals provide a voltage difference, allowing current to flow through circuits that supplies consistent energy to actuate and operate components like motors, sensors and the control unit, ensuring seamless functionality.

[00100] The present invention works best in the following manner, where the two-part gate 101 as disclosed is made up of the first part 102 and the second part 103 that are connected with one another in the hinged manner for securing the entrance of the vehicle. The control unit enables operation of the two-part gate 101 in the ramp mode and in the lift mode in accordance with the input. The ramp mode and the lift mode are used for accessibility of the variety of wheelchair user. The sliding arrangement 104 is attached to the cabin. The sliding arrangement 104 enables the sliding of the two-part gate 101 along the height of the entrance, along the inner floor of the cabin and the rotation of the two-part gate 101 outwards towards the ground surface for positioning at the incline in the ramp mode. The sliding arrangement 104 includes the pair of sliding tracks 201 that is provided vertically along the entrance and extending along the floor of the cabin, the pair of carriages 202 translating along the sliding tracks 201. One carriage 202 is coupled with each of the sliding tracks 201. The two-part gate 101 is rotatably connected with the pair of carriages 202 for the rotation of the two-part gate 101 outside of the plane of the entrance. The two-part gate 101 is connected with the carriages 202 by means of pin joints 203 for the rotation of the two-part gate 101 outside of the plane of the entrance towards the ground surface for positioning at the incline in the ramp mode. The downward gap is provided at the vertex of each of the sliding tracks 201. The downward gap enables the sliding of the two-part gate 101 outwards from the sliding tracks 201 onto the ground surface. The plurality of hydraulic actuators 401 is positioned over the second part 103 of the two-part gate 101. These hydraulic actuators 401 are used to lift the wheelchair that is positioned over the second part 103 to bring the two-part gate 101 in level with the floor of the cabin. The two-part gate 101 is brought in the level of the floor of the cabin for climbing into the cabin, in the lift mode. The motorised wheel 402 is provided at the bottom end of each of the hydraulic actuators 401. The motorised wheel 402 enables the inward sliding of the two-part gate 101 for boarding of the wheelchair in the lift mode. The securing arrangement is mounted with the second part 103 of the two-part gate 101 to secure the wheelchair over the second part 103 in the lift mode. The securing arrangement includes the pair of stoppers that is provided towards the outward edge of the second part 103.

[00101] In continuation, each of the stoppers consists of the hinged bar 109 that is positioned within the slot 110, embedded in the second part 103, rotated to be positioned in the vertical orientation to prevent the wheelchair from rolling back, in the lift mode. The securing arrangement further includes the clamp 108 that is provided over each lateral edge of the second part 103 in the extendable manner for engaging with the hub of the wheel of the wheelchair. Each of the clamps 108 is attached to the lateral edge of the second part 103 by means of the vertical telescopic pole 111. The plurality of proximity sensors 106 is positioned in the two-part gate 101 for detecting the alignment of the wheelchair over the two-part gate 101. The alignment of the wheelchair over the two-part gate 101 is detected to cause the securing arrangement to secure the wheelchair. The cascading slider 301 attaches the seat within the cabin. The cascading slider 301 facilitates the backward sliding of the seat for accommodating the wheelchair in lift mode. The cascading slider 301 consists of the two-panel sliding configuration. The plurality of ultrasonic sensors 105 is embedded over the two-part gate 101 for detecting the width of the wheelchair. The width of the wheelchair is detected to cause the control unit to actuate the cascading slider 301 to translate the seat rearwards if the width of the wheelchair exceeds the predefined width of the space in front of the seat. The layer of the friction material is applied over the two-part gate 101 for facilitating grip between the wheels of the wheelchair and the two-part gate 101. The mounting unit 112 is installed within the cabin to secure the vacant wheelchair. The mounting unit 112 includes the frame 501 that is attached within the enclosure 502, provided with the inner surface of the cabin. The frame 501 is provided with the plurality of extendable grippers 503 to grip the wheelchair. The presence sensor 107 is positioned on the two-part gate 101 to detect the presence of the wheelchair over the two-part gate 101 and the absence thereof. The detection of the presence and absence of the wheelchair over the two-part gate 101 enables the control unit to safely execute the ramp mode and the lift mode. The presence sensor 107 is the load cell that is embedded in the two-part gate 101 to detect weight over the two-part gate 101, thus indicating the presence of the wheelchair. The control panel in operative communication with the control unit receives input regarding the selection between the ramp mode and the lift mode.

[00102] In continuation, the method for providing dual-mode accessibility to the wheelchair for boarding onto the vehicle includes the following steps the dual-mode accessibility to the wheelchair for boarding onto the vehicle is having the two-part gate 101 that is composed of the first part 102 and the second part 103, the first part 102 and the second part 103 are connected with one another in the hinged manner, for securing the entrance of the vehicle, installing the two-part gate 101 with the entrance by means of the sliding arrangement 104, receiving the input regarding the selection between the ramp mode and the lift mode, activating the ramp mode by executing steps of sliding the two-part gate 101 along the height of the entrance and rotating the two-part gate 101 outwards towards the ground surface for positioning at the incline, operating the lift mode by executing the steps of rotating the first part 102 of the two-part gate 101 downwards while rotating the second part 103 of the two-part gate 101 upwards for levelling the second part 103 with the ground surface and securing the wheelchair over the second part 103 by means of the securing arrangement, raising the second part 103 by extending the plurality of hydraulic actuators 401 provided underneath the second part 103, for lifting the wheelchair, powering the motorised wheels 402 to translate the two-part gate 101 for the inward sliding into the cabin.

[00103] In an exemplary implementation of the present invention, the dual-mode wheelchair accessibility system for the vehicle is installed at the access way of a three-wheeled passenger vehicle, colloquially known as an “auto rickshaw.” Auto-rickshaws are widely used in urban and semi-urban areas for short-distance travel, but they present significant challenges for wheelchair users due to narrow entrances, elevated floors, and limited interior space. Conventional methods of boarding require manual lifting or leaving the wheelchair outside, which not only compromises passenger safety but also reduces independence and dignity. Additionally, repeated manual handling increases the risk of injury to both the passenger and the assistant, and slows down the boarding process, impacting efficiency in public transport scenarios.

[00104] The present invention addresses these challenges by providing a fully automated ramp and lift platform integrated into the vehicle. The two-part gate 101 functions either as an inclined ramp or a powered horizontal lift, enabling wheelchair users to enter and exit the vehicle smoothly and independently. Advanced sensors detect the wheelchair’s position and alignment, while AI-based control ensures precise adjustment of the platform to match the vehicle floor level. Automated clamping arrangement securely holds the wheelchair during transit, preventing accidental movement or tipping.

[00105] The system is compact and designed for seamless integration within the limited interior of an auto-rickshaw, ensuring minimal space disruption while maintaining passenger comfort. By eliminating the need for manual assistance, the invention enhances safety, accessibility, and convenience for mobility-impaired individuals. The present invention also has a positive social impact, empowering passengers with autonomy, reducing boarding delays, and promoting inclusive transportation solutions in densely populated urban environments.

[00106] Moreover, the system’s compatibility with sensor-driven automation and passive mechanical components enables scalable production using existing manufacturing technologies. The modular nature of the two-part gate 101 also facilitates easy assembly, maintenance, and customization, making it commercially viable for mass deployment in public and private transport fleets. Accordingly, the invention offers a practical, cost-effective, and safety-enhancing solution for improving passenger vehicle design in both emerging and developed markets.

[00107] Although the field of the invention has been described herein with limited reference to specific embodiments, this description is not meant to be construed in a limiting sense. Various modifications of the disclosed embodiments, as well as alternate embodiments of the invention, will become apparent to persons skilled in the art upon reference to the description of the invention. , C , Claims:1) A dual-mode wheelchair accessibility system for a vehicle, comprising a cabin with an entrance to accommodate passengers, a seat within the cabin for sitting of the passengers, characterised in that:

i) a two-part gate 101 composed of a first part 102 and a second part 103 connected with one another in a hinged manner, securing the entrance of the vehicle;
ii) a control unit to enable operation of the two-part gate 101 in a ramp mode and in a lift mode in accordance with an input, for accessibility of a variety of wheelchair user;
iii) a sliding arrangement 104 configured with the cabin to enable sliding of the two-part gate 101 along a height of the entrance, along an inner floor of the cabin and a rotation of the two-part gate 101 outwards towards a ground surface for positioning at an incline in the ramp mode;
iv) a plurality of hydraulic actuators 401 arranged over the second part 103 of the two-part gate 101 to lift wheelchair positioned over the second part 103 to bring in level with the floor of the cabin, for climbing into the cabin, in the lift mode; and
v) a securing arrangement installed with the second part 103 of the two-part gate 101 to secure the wheelchair over the second part 103 in the lift mode.

2) The system as claimed in claim 1, wherein the sliding arrangement 104 comprises a pair of sliding tracks 201 provided vertically along the entrance and extending along floor of the cabin, a pair of carriages 202 translating along the sliding tracks 201, one carriage 202 coupled with each of the sliding tracks 201, the two-part gate 101 rotatably connected with the pair of carriages 202 for a rotation of the two-part gate 101 outside of a plane of the entrance.

3) The system as claimed in claim 1, wherein the two-part gate 101 is connected with the carriages 202 by means of pin joints 203 for the rotation of the two-part gate 101 outside of a plane of the entrance towards the ground surface for positioning at an incline in the ramp mode.

4) The system as claimed in claim 1, further comprising a downward gap provided at a vertex of each of the sliding tracks 201 to enable sliding of the two-part gate 101 outwards from the sliding tracks 201 onto the ground surface.

5) The system as claimed in claim 1, further comprising a cascading slider 301 attaching the seat within the cabin to facilitate a backward sliding of the seat to accommodate the wheelchair in lift mode.

6) The system as claimed in claim 1, wherein the cascading slider 301 comprises a two-panel sliding configuration.

7) The system as claimed in claim 1, further comprising a plurality of ultrasonic sensors 105 embedded over the two-part gate 101 to detect width of the wheelchair to cause the control unit to actuate the cascading slider 301 to translate the seat rearwards if the width of the wheelchair exceeds predefined width of the space in front of the seat.

8) The system as claimed in claim 1, wherein the securing arrangement comprises a pair of stoppers provided towards an outward edge of the second part 103 and a clamp 108 provided over each lateral edge of the second part 103 in an extendable manner to engage with a hub of a wheel of the wheelchair.

9) The system as claimed in claim 1, wherein each of the stoppers comprises a hinged bar 109 positioned within a slot 110 embedded in the second part 103, rotated to be positioned in a vertical orientation to prevent the wheelchair from rolling back, in the lift mode.

10) The system as claimed in claim 1, wherein each of the clamps 108 is attached with the lateral edge of the second part 103 by means of vertical telescopic pole 111.

11) The system as claimed in claim 1, further comprising a plurality of proximity sensors 106 embedded in the two-part gate 101 to detect an alignment of the wheelchair over the two-part gate 101, to cause the securing arrangement to secure the wheelchair.

12) The system as claimed in claim 1, further comprising a motorised wheel 402 disposed at a bottom end of each of the hydraulic actuators 401 to enable an inward sliding of the two-part gate 101 for boarding of the wheelchair in the lift mode.

13) The system as claimed in claim 1, further comprising a layer of a friction material applied over the two-part gate 101 to facilitate grip between the wheels of wheelchair and the two-part gate 101.

14) The system as claimed in claim 1, further comprising a mounting unit 112 installed within the cabin to secure a vacant wheelchair.

15) The system as claimed in claim 1, wherein the mounting unit 112 comprises a frame 501 attached within an enclosure 502 provided with an inner surface of the cabin, the frame 501 provided with a plurality of extendable grippers 503 to grip the wheelchair.

16) The system as claimed in claim 1, further comprising a presence sensor 107 installed with the two-part gate 101 to detect presence of wheelchair over the two-part gate 101 and an absence thereof to enable the control unit to safely execute the ramp mode and the lift mode.

17) The system as claimed in claim 1, wherein the presence sensor 107 is a load cell embedded in the two-part gate 101 to detect weight over the two-part gate 101 indicating presence of the wheelchair.

18) The system as claimed in claim 1, further comprising a control panel in operative communication with the control unit to receive input regarding selection between the ramp mode and the lift mode.

19) A method for providing dual-mode accessibility to a wheelchair for boarding onto a vehicle, comprising steps of:
i) having a two-part gate 101 composed of a first part 102 and a second part 103 connected with one another in a hinged manner, for securing the entrance of the vehicle;
ii) installing the two-part gate 101 with the entrance by means of a sliding arrangement 104;
iii) receiving an input regarding selection between a ramp mode and a lift mode;
iv) activating the ramp mode by executing steps of:
a) sliding the two-part gate 101 along a height of the entrance; and
b) rotating the two-part gate 101 outwards towards a ground surface for positioning at an incline;
v) operating the lift mode by executing steps of:
a) rotating the first part 102 of the two-part gate 101 downwards while rotating the second part 103 of the two-part gate 101 upwards for levelling the second part 103 with ground surface;
b) securing a wheelchair over the second part 103 by means of a securing arrangement;
c) raising the second part 103 by extending a plurality of hydraulic actuators 401 provided underneath the second part 103, for lifting the wheelchair; and
d) powering the motorised wheels 402 to translate the two-part gate 101 for an inward sliding into the cabin.