In India, there are large number of amputees, either amputated due to an accident or a disease. A good number of these are above knee amputees. Even though many prosthetic legs are available in the market, a cost-effective prosthetic leg with good functionality is not available. Cheap prosthetic legs like the Jaipur foot provide only support and feedback based prosthetic legs costs around 70,000 dollars. In India where many amputees are struggling for mere survival, the chances of affording a high cost limb seems low.
We aim to develop a feedback based prosthetic leg in the reach of common man. Our idea is to incorporate a proportional solenoid valve controlled hydraulic damping system in prosthetic legs. In costly prosthetic legs, flow controlling for hydraulic damping is achieved by servo controlled valves, which is high costly. By replacing servo controlled valves with proportional solenoid valves, we can attain almost the same functionality at much less cost.
Purely mechanical legs uses passive mechanism less adaptive to ground level or gait speed. The main differences in the design of intelligent and passive prostheses are in their damping systems because an adequate damping allows for fast transitions in stride velocity, which increases the autonomy of the amputee.
Proportional solenoid valves are able to achieve varying valve opening positions according to electrical signals for various phases of walking. The force sensors in the prosthetic leg detect live data to adjust the damping effect at knee joint to provide a natural looking walking style.
By using materials like HDPE instead of carbon fiber for construction, the cost of the leg is reduced without compromising strength.
ABOUT THE ENTRANT
Name: Muhammed Janish U
Type of entry: individual
Muhammed Janish is inspired by:
We have a friend who is an above knee amputee. His right leg was amputated two
years ago. Even though his family managed to buy him a hydraulic mechanical leg
which costs around 7500 dollars it’s difficult for him to walk.
He shared us the difficulties while using purely mechanical legs and functionalities of a costly feedback based leg like Ottobock C-leg which he can't afford. This gave us the thought
that why a low cost feedback-based leg is still unavailable in India.
Software used for this entry:
Patent status: none