Hybrid Knee Joint
The Hybrid knee combines a rotary hydraulic damper for the stance phase with a microprocessor-controlled pneumatic cylinder for cadence-responsive swing control.
- Rotary hydraulic damper lets the knee flex and yield at a controlled, user-adjustable rate during stance
- Microprocessor-controlled pneumatic cylinder provides cadence-responsive swing control
- At heel strike the MRS system detects the ground reaction force and initiates hydraulic resistance to flexion
- As weight passes through the toes the MRS switches off hydraulic resistance to allow transition into swing
- A proximity sensor measures each walking cycle from knee flexion data; the microprocessor drives a stepping motor that adjusts the pneumatic needle valve to the patient’s walking speed
- Flexion angle 140 degrees
- Aluminum alloy 7075, stainless steel and carbon fiber frame; component weight 1375 g
- Tested to ISO 10328
- Warranty 36 months
- Pair with a Roadwalking foot for best above knee prosthesis performance
Bilateral involvement.
Active adult.
Athletes.
Children.
Exceeds basic use.
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Code 6.006.01 |
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| Characteristics | Flexion angle 140° | |
| Component Weight | 1375 g | |
| Material |
Aluminum alloy 7075 + Stainless Steel + carbon fiber frame |
|
| Maximum User Weight |
125 Kg |
|
Key specifications
| Device Category | Hybrid prosthetic knee joint — hydraulic stance, pneumatic swing |
| Mobility Level (K-Level) | K4 |
| Flexion Angle | 140 degrees |
| Material | Aluminum alloy 7075, stainless steel, carbon fiber frame |
| Component Weight | 1375 g |
| Tested to Standard | ISO 10328 |
| Warranty | 36 months |
| Indication | Bilateral involvement; active adult; exceeds basic use |
| Stance Control | Rotary hydraulic damper, user adjustable |
Ordering and technical support
Supplied by Roadrunnerfoot Engineering S.r.l., Pregnana Milanese, Italy. The full range is listed in the Roadrunnerfoot 2025 catalogue. Orthopedic technicians, clinics and international distributors can request technical data sheets, product codes, pricing and fitting support from our team.