Intellectual Property India Publishes Patent Application for 'Electric Wheelchair With Central Telescopic Limb Module For Ai- Enabled Self-Balancing Navigation Of Stairs, Curbs, And Uneven Terrain' Filed by Chhatrapati Shivaji Institute Of Technology; Mr. Jayant Rajpurohit; Dr. Santosh Kumar Sharma; Dr. Ravi Mishra; and Mr. Suraj Harmukh

MUMBAI, India, Feb. 13 -- Intellectual Property India has published a patent application (202521108685 A) filed by Chhatrapati Shivaji Institute Of Technology; Mr. Jayant Rajpurohit; Dr. Santosh Kumar Sharma; Dr. Ravi Mishra; and Mr. Suraj Harmukh, Durg, Chattisgarh, on Nov. 10, 2025, for 'electric wheelchair with central telescopic limb module for ai- enabled self-balancing navigation of stairs, curbs, and uneven terrain.'

Inventor(s) include Mr. Jayant Rajpurohit; Dr. Santosh Kumar Sharma; Dr. Ravi Mishra; and Mr. Suraj Harmukh.

The application for the patent was published on Feb. 13, under issue no. 07/2026.

According to the abstract released by the Intellectual Property India: "The present invention relates to an autonomous electric wheelchair system and method, designated the BalanceWheel platform (1), for navigating stairs up to 20 cm/step, curbs, and uneven terrain. A wheelchair chassis (10) integrates a central telescopic limb module (12) with four "X"-arranged struts (14) driven by linear actuators (42) for dynamic self-balancing, achieving 2 horizontality and adapting to 15 lateral tilts through sensor-driven load distribution. It incorporates omni-directional wheels (16) with torque vectoring for hybrid locomotion. A multi-modal sensor suite, including stereo depth cameras (24), ultrasonic sensors (26), 9-axis IMU (28), strain gauges (30), front-mounted depth camera array (58), and rear-facing sensor cluster (52), enables real-time environmental mapping, obstacle detection, and predictive instability correction. The system employs a reinforcement learning-optimized AI path planning module (38) on dual ESP32 microcontrollers (22) to generate adaptive trajectories tailored to user patterns, supported by hot-swappable lithium-ion battery cartridges (32) with smart power allocation. Over-center locks (34), emergency shutdown switch (36), and biometric-geofencing anti-theft alarm system (48) provide fail-operational safety. Adaptive front stabilizer arms (56), dynamic front wheel suspension (60), rear telescopic stabilizer legs (50), and rear counterbalance mechanism (54) enhance ascent and descent stability within a self-configuring modular design for mid-wheel-drive retrofitting, ensuring enhanced autonomy, accessibility, and compliance with mobility standards through correlated sensor-AI-actuation."

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