Engineered for superior stance control and a natural gait, the HHS Monocentric Knee Joint utilizes advanced rotary hydraulics to deliver a smooth and secure walking experience. This robust hydraulic prosthetic knee features independent swing and stance adjustments, progressive damping, and a manual lock for maximum stability. Built for active daily use, it safely supports users up to 125 kg and boasts a fresh water waterproof design for ultimate everyday reliability.


Waterproof Performance

IB-ER Fresh Water Waterproof Prosthetic Knee

Monocentric Knee Joint with Rotary Hydraulics


Rotary Hydraulics
Fresh Water Waterproof
Manual Lock
Progressive Damping
CE Certified
ISO 10328 Tested


Functional Highlights


  • Hydraulic Control: Independent swing and stance phases.

  • Safety First: Smooth, safe descent on stairs and ramps.

  • Extra Stability: Manual lock feature for standing.

  • Adaptability: Progressive damping for varied walking speeds.

The HHS Monocentric Knee Joint is an advanced hydraulic prosthetic knee meticulously engineered to provide smooth, secure, and natural movement for everyday walking. It supports users with highly reliable stance control while facilitating a fluid swing phase for comfortable gait progression. Featuring a state-of-the-art rotary hydraulic system, this prosthetic component adapts seamlessly to different walking speeds, creating a stable and confident experience. Its compact, durable, and freshwater waterproof construction makes it an ideal mechanical knee solution for active daily use, combining safety, biomechanical mobility, and precise adjustment capabilities.

Technological Architecture & Adjustments


Flexion & Extension Tuning

The HHS provides specialized adjustment options for optimal control. Flexion and extension resistance can be configured independently via dedicated valves conveniently located on both sides of the product, ensuring a personalized swing phase.


Stance Phase Damping

Engineered for superior security. The threshold sensitivity and stance phase damping resistance can be finely adjusted separately utilizing two ergonomic rings positioned on the posterior aspect of the joint.


Manual Lock System

Maximum stability when you need it most. The HHS can be easily locked and unlocked manually using the small, accessible wings on both sides. This mechanism instantly locks the rotary hydraulic unit, preventing any rotation.

Technical Specifications

Product CodeHHS
Proximal ConnectionPyramid Adapter
Distal ConnectionTube Clamp Ø 34 mm
Max. User Weight125 Kg
Max. Knee Flexion Angle130°
Product Weight1167 gr
Overall Length / Build Height232 mm / 195.5 mm
Water ConditionFresh Water Waterproof