Mechanical 4-Bar Knees

We offer an extensive range of mechanical and pneumatic 4-Bar knees. Their geometry provides stability and security to the user. The 4-Bar polycentric system provides shortening of the swing, making them ideal for knee disarticulation patients, or those with long residual limbs.

Features and benefits

• Mechanical 4-Bar Knee 1: A lightweight 4-Bar knee with exceptional stability. This knee is also available with a hand operated knee lock and optional extension assist.
• Mechanical 4-Bar Knee 2: A 4-Bar knee suitable for knee disarticulation with extension assist and friction adjustment. It comes complete with laminating anchor.
• Mechanical 4-Bar Knee 3: A compact 4-Bar knee with adjustable buffer to change its stability to suit the individual. Adjustable friction and extension assist. Integral proximal pyramid adaptor.
• Mechanical 4-Bar Knee 4: A compact 4-Bar knee with internal extension assist and friction adjustment. Adjustable buffer to change the stability of the knee to suit the individual. Integral proximal pyramid adaptor.
• Mechanical 4-Bar Knee 5: A low profile, lightweight 4-Bar knee suitable for knee disarticulation. Adjustable friction control and extension assist. Swing phase is adjustable by spring control.

Recommendations for use

• These mechanical 4-Bar knees are suitable for use with low functionality levels and high safety and stability needs.