MEDI GLOBAL ASSISTIVE DEVICE CO., LTD

Pneumatic Four-bar Knee Joint

 

Technical Parameters:

Overall height of knee joint: 211mm

 

Width of Knee Joint: 58mm

 

Adjustment amount of small pyramid : 5mm

 

Adjustment amount of valve : 3mm

 

The overall weight of knee joint: 820g

 

Maximum load-bearing of joint : 100kg

 

Maximum  flexion angle of knee joint: 142 °

 

Summary:

The knee joint is a combined four-axis knee joint, its multiaxial characteristics  makes it possible to run translationally and rotationally. So it is closer to the motion characteristics of the human knee. Installation of  the knee joint offers a good knee gait to patients.

 

When knee joint is straight, the center of rotation is above the joints and at the back of  the load-bearing line. So it ensures stability of the knee. On the other hand you can adjust the position of the pyramid on the linkage to find the balance point of the knee stability and flexibility. Then you can meet the requirements of the patient's best gait.

 

When knee is flexed, the speed of center of rotation decreases along with flexion that return to the normal position of the knee axis. This behavior  is conducive to flexion movement of the patient.

 

The speed of  knee extension and flexion can be adjustable,which help patients choose the best gait and stride.