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Product image | Overall view 1:1 (in colour) Knee joint, monocentric, with rotation hydraulics 3R80
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Product image | Overall view 1:1 (in colour) Knee joint, monocentric, with rotation hydraulics 3R80
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3R80 - Knee prosthetics

Knee joint, monocentric, with rotation hydraulics

Show your determination, and don’t let anything stop you.

As a prosthesis wearer, you want to be confident that your knee joint meets your daily requirements and supports changing walking speeds. Through continuous further development, our goal is to offer you a knee joint that makes you as independent as possible in everyday life.
The 3R80 with its unique rotation hydraulics principle is now also approved for prosthesis wearers with a body weight of up to 150 kg. With the 3R80, both the stance and the swing phase are controlled by the hydraulics. For example, walking down stairs step-over-step and walking down inclines are effectively supported by closely approximating a physiological gait pattern, even at various walking speeds. The 3R80 is water-resistant to a depth of 3 metres and has a manual lock for even better safety, especially in wet areas.

As a prosthesis wearer, you want to be confident that your knee joint meets your daily requirements and supports changing walking speeds. Through continuous further development, our goal is to offer you a knee joint that makes you as independent as possible in everyday life.
The 3R80 with its unique rotation hydraulics principle is now also approved for prosthesis wearers with a body weight of up to 150 kg. With the 3R80, both the stance and the swing phase are controlled by the hydraulics. For example, walking down stairs step-over-step and walking down inclines are effectively supported by closely approximating a physiological gait pattern, even at various walking speeds. The 3R80 is water-resistant to a depth of 3 metres and has a manual lock for even better safety, especially in wet areas.

Product type:

Mechanic monocentric

Mobility grade:

3, 4

Max. body weight:

150 kg

All specifications
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Specifications

Product information

Product typeMechanic monocentric
Mobility grade3, 4
Max. body weight150 kg
Amputation levelTransfemoral amputation, Hip disarticulation, Knee disarticulation, Hemipelvectomy
User groupadults
ActivitiesDaily use, Sports
Moisture resistancewaterproof
MaterialAluminium

Product Data

Article number3R80=ST
Max. body weight150 kg
Mobility grade3, 4
Weight1255 g
Proximal connection

Threaded connector

Distal connection

Tube clamp Ø 34 mm

Knee flexion angle150 °
System height179 mm
Proximal system height to alignment reference point44 mm
Distal system height to alignment reference point135 mm
Build height216 mm
Proximal build height to alignment reference point44 mm
Distal build height to alignment reference point172 mm
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EBSpro knee joint, polycentric, with hydraulic swing phase control

How does the EBSpro work?The mechanical principle of the EBSpro is based on the proven 3R60 prosthetic joint.The polycentric prosthetic joint has five axes that are arranged to form a ring. The anterior axis chain is designed like a conventional four-axis joint, but the posterior linkage bar is interrupted by an additional pivot point (Fig. 1). The proven design thus allows for two different modes of operation: swing phase mode and stance phase flexion mode. Two specially configured miniature hydraulic units (Fig. 2, A+B) control the two modes. Outstanding performance during the stance phase is the key feature of the 3R60.The spring and hydraulics combination in stance phase flexion mode is individually adjustable and can be precisely adapted to suit the requirements of the prosthesis wearer. Thanks to the progressive nature of the EBS resistance – realised with an auto-adaptive EBS unit – the effect can adapt itself over a large range of walking speeds for the first time.The higher the walking speed, the greater the extent to which flexion is limited. The lower the walking speed, the less damping resistance takes effect. This ensures greater stance phase flexion (Fig. 3). In this way, this important function adapts to various everyday situations. For the prosthesis wearer, this means enhanced safety and comfort as well as a highly natural gait pattern.
How does the EBSpro work?The mechanical principle of the EBSpro is based on the proven 3R60 prosthetic joint.The polycentric prosthetic joint has five axes that are arranged to form a ring. The anterior axis chain is designed like a conventional four-axis joint, but the posterior linkage bar is interrupted by an additional pivot point (Fig. 1). The proven design thus allows for two different modes of operation: swing phase mode and stance phase flexion mode. Two specially configured miniature hydraulic units (Fig. 2, A+B) control the two modes. Outstanding performance during the stance phase is the key feature of the 3R60.The spring and hydraulics combination in stance phase flexion mode is individually adjustable and can be precisely adapted to suit the requirements of the prosthesis wearer. Thanks to the progressive nature of the EBS resistance – realised with an auto-adaptive EBS unit – the effect can adapt itself over a large range of walking speeds for the first time.The higher the walking speed, the greater the extent to which flexion is limited. The lower the walking speed, the less damping resistance takes effect. This ensures greater stance phase flexion (Fig. 3). In this way, this important function adapts to various everyday situations. For the prosthesis wearer, this means enhanced safety and comfort as well as a highly natural gait pattern.
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