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C-Leg 4

Reference number	3C98-3
Max. user weight	136 kg
Type of Knee	Microprocessor controlled

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Reclaim your determination

No mechatronic knee joint is worn by as many users worldwide as the C-Leg. In 1997, it set a new fitting standard for leg amputations as the world’s first hydraulic leg prosthesis solution to be controlled entirely by a microprocessor. The C-Leg 4 offers users the latest generation of the C-Leg. It continues to provide the proven advantages of the leg prosthesis and also comprises the most extensive further developments in the history of the C-Leg.

Thanks to intelligent technology, the C-Leg adapts to the individual gait pattern.
Behind this is a complex sensor system that captures data in real time and recognises which phase of walking the user is in, whether on level ground, on stairs, ramps or slopes – and now with the C-Leg 4, on difficult surfaces such as forest floor, sand and gravel.
Smaller obstacles, complex terrain or large crowds can be mastered thanks to the adapting stance phase resistances.
The prosthesis is weatherproof.

Click on the red 'Hot spots' in the image for more information on this detail.

Hydraulic unit

The hydraulic unit controls the C-Leg. It generates motion resistances for flexion and extension during the stance and swing phase.

Knee angle sensor

The knee angle sensor measures the flexion angle and the angular velocity of the joint.

Battery and electronics

A lithium-ion battery provides the energy required to control the knee joint. It is located directly in the rotation axis of the C-Leg. We recommend charging the product every day when used by the patient on a daily basis. The integrated microprocessor coordinates all measurement and control processes.

Inertial motion unit (IMU)

A gyroscope and acceleration sensors allow the position and speed of the C-Leg in space to be determined in real time. Control of the prosthesis is based on motion analysis and additional force determination.

Bluetooth®

Integrated Bluetooth® technology permits straightforward communication with the joint. An existing connection is displayed with an LED. Bluetooth® can be deactivated if necessary.

Charging

The receptacle for the charger is located on the back of the joint and protected by a cover.

New carbon frame design

In order to withstand the varied demands of everyday life, the frame is made from carbon – an especially strong, high-grade and lightweight material. The frame houses and protects the electronics, the hydraulic unit and the battery. Thanks to its new design, the C-Leg 4 now has a lower system height and therefore a larger fitting spectrum.

Part Number

3C88-2

Request information

Reclaim your determination

Thanks to intelligent technology, the C-Leg adapts to the individual gait pattern.
Behind this is a complex sensor system that captures data in real time and recognises which phase of walking the user is in, whether on level ground, on stairs, ramps or slopes – and now with the C-Leg 4, on difficult surfaces such as forest floor, sand and gravel.
Smaller obstacles, complex terrain or large crowds can be mastered thanks to the adapting stance phase resistances.
The prosthesis is weatherproof.

Click on the red 'Hot spots' in the image for more information on this detail.

Technical data

The following data refers to the 3C98-3, 3C98-3=9.2, 3C88-3 and 3C88-3=9.2 joints.

Mobis level
Activity-Level	MG2, MG3, MG4
Frame material	Carbon
Max. knee flexion angle	130° without flexion stop
Minimum distal system height with 2R57/2R67 tube adapter	289 mm / 329 mm
Maximum distal system height with 2R57/2R67 tube adapter	494 mm / 534 mm
Max. user weight	136 kg
Battery capacity	At least 16 hours of uninterrupted walking; approx. two days with average use. We recommend charging the product once a day when used by the patient on a daily basis.
Adjustable modes	2
Moisture protection	Weatherproof
Feature	Knee joint, Real-time control, Easy swing phase initiation independent of forefoot load, Safe backward walking, Intuitive Stance, Various walking speeds, Sitting function, App control, Protective Cover in various designs
Type of Knee	Microprocessor controlled
Recommended feet	1C60, 1C61, 1C62, 1C63, 1C64, 1C66, 1B1

Product versions

Model	3C98-3	3C98-3=9.2	3C88-3	3C88-3=9.2
Colour	Volcano shadow	Desert pearl	Volcano shadow	Desert pearl
Proximal connection	Pyramid adapter	Pyramid adapter	Threaded connector	Threaded connector
Weight	1,250 g +/- 25 g	1,250 g +/- 25 g	1,255 g +/- 25 g	1,255 g +/- 25 g