January 24, 2018

4 Axis Polycentric Pneumatic Knee

Walnut Medical P-Leg  WM-001/WM-002        MADE IN INDIA

Download Brochure Walnut Medical PLeg






High Grade Aluminum/SS316



Amputation Level



Above-Knee / Trans-Femoral



Overall Height






Product Weight





Flexion Angle Connectors145°

Proximal – Pyramid

Distal – Tube Clamp

Max Patient Weight for WM-001 with Aluminum Side Bars100 Kgs
Max Patient Weight for WM-002 with SS-316 Side Bars125 Kgs


Single-chamber pneumatics control the swing phase


In swing phase, the smooth yet powerful single-chamber pneumatics

– one chamber each for flexion and extension damping – do not run out of air, even at various walking speeds.

Harmonious flexion and extension movements, and therefore

an approximation of the physiological gait pattern, are made

possible. Here the joint geometry effectively shortens the prosthesis

during swing, resulting in more ground clearance.


Four-axis polycentric structure ensures stance phase



In extension, the instantaneous centre of rotation is

located above the joint and behind the load line, resulting in

high stability in stance phase. The integrated extension assist

spring ensures that the lower leg of the prosthesis is always

extended at heel strike and weight can be safely supported on


First Pneumatic Knee Joint Designed, Developed and Manufactured in India, in collaboration with CSIR, Government of India.

German Quality made in India            ISO 10328 13485                                                                   

 Polycentric – 4 Axis – Pneumatic Knee Joint

the prosthesis side. This is especially advantageous when the

user takes small compensating steps, turns in a circle or walks

in confined areas.

The Walnut Medical P-Leg offers numerous advantages, not only whilst walking.


When sitting or kneeling, the large maximum flexion angle of

145° and the low system height when flexed make it

both comfortable and practical.


Easy to fit


Flexion and extension dampening can be separately and

individually customized to the needs of the user

This effectively reduces the working time of the prosthetist and

leads to rapid fitting success.



  • Treatment of all amputation levels
  • Powerful swing phase control
  • Flexion and extension damping can be easily adjusted independently of the other
  • High stance phase stability thanks to polycentric four-axis joint
  • Robust, durable construction
  • Lightweight aluminum design