Pneumatic Damping Prosthetic Leg for above-knee Amputees

Project description

Our invention is a cost-effective feedback based prosthetic leg for above-knee amputees. Currently, the majority of amputees in India depend on low functionality mechanical legs like ReMotion knee, Jaipur limb, etc. because of the cost of a high functional feedback based leg (70000 dollars) which middle-class people can’t afford.

All mechanical prosthesis like Uniaxial Knee, ReMotion limb, locks and transfer load to the ground only when the load is acting normal to the ground; when the leg is in a bent position won’t lock and the amputee may fall down. It won’t give any walking assist, it only provides support & drains more energy.

We incorporated a proportional solenoid valve controlled pneumatic damping system in a mechanical knee. The force sensor at the foot detects the pressure applied by the amputee and adjusts the damping resistance at the knee which enables to lock the knee joint at any angle and position correspondingly.

In costly prosthetic legs like OTTOBOCK C-LEG, damping at the knee is achieved using servo motor controlled valve which is costly. We replaced servo controlled damping system with a proportional solenoid valve controlled damping system which works similarly and at a very low cost compared to the former. We also used HDPE for socket making instead of carbon fiber which reduced price without compromising safety.





Interested in:




Contact name:

Muhammed Janish U

Team members:

Muhammed Janish U (project lead)

Abhijith A

Anurudh G

Arun kumar A P


Many of the amputees are employable if they can be fitted with a good functionality artificial limp and can walk. Yet they are forced to be confined to their homes because they don’t have access to a good functionality artificial limb. Even amputated Indian soldiers use less functional mechanical leg like Jaipur leg. A feedback-based artificial limb like OTTOBOCK C-LEG cost around 70000 dollars, which middle-class people can only dream about. We made our first prototype with less than 500 dollars.


Request more info here


We're not around right now. But you can send us an email and we'll get back to you, asap.


Logo ministerio de economia y competitividad gobierno de españa logo ICEX logo feder seal of excellence  startup chilelogo innovo

©2021 Ennomotive Engineering Competitions - Legal Info ENNOMOTIVE SL, as part of the ICEX Next - Introduction to Export Program, has received support from ICEX and funding by FEDER, the European Fund. The goal of this support is to contribute to the international development of the company.  

Ennomotive will help you solve your technological challenges. If you have any questions about our open innovation platform, please contact us.

Log in with your credentials

Forgot your details?