Streifeneder Unternehmensgruppe

3A2500 Polycentric Knee Joint with Hydraulic Swing Phase Control

  • adjustable hydraulic end position damping for optimal wearing comfort
  • adaption to the walking speed
  • shiftable proximal connection in A-P direction approx. 10 mm
  • shortened leg during swing phase by polycentric knee joint construction
  • simple adjustment options of the hydraulic extension- and flexion resistance by means of sensory feedback (clicks)
  • integrated pneumatic chamber for extension assist
  • simple and safe switching into freewheel mode (cycling mode) by means of push button
  • various proximal connection options (pyramid and M36 threaded connection)
  • energy saving initialization of swing phase
  • mechanical stance phase controle by polycentric technology (posterior position of pivot point)
  • high-capacity hydraulics due to bigger zylinder volume - thermically inoffensive
  • excellent running smoothness due to high-quality bearings

Technical data

  • max. patient weight: 150 kg
  • activity level (walky): 3 to 4
  • connection proximal: adjustment core
  • connection distal: adjustment core
  • knee flexion angle: 136°
  • overall height: 224 mm
  • overall height of joint head: 36 mm
  • effective height: 196 mm
  • effective proximal height: 23 mm
  • effective distal height: 173 mm


  • cosmetic soft foam cover 62A52 and 62A152

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Material Weight Item-No.
aluminium 1124 g 3A2500

With the hydraulic swing phase control and the hydraulic shock absorption action we are able to create a harmonic gait pattern.