Knee-joint with free-wheel - is fitted with brake which is controlled by sensor inside prosthesis

摘要

The knee-joint prosthesis has the lower leg (2) attached to the upper leg (5) by a free-wheel. This has a housing (3) which can be held stationary relative to the upper leg (5) by a brake (6). When the brake is applied the lower leg can be swung from the bent position to the straight position but it cannot be swung in the reverse direction. The magnitude of the braking force can be varied by a signal generated by a sensor fitted inside the prostesis. The variation in the braking force controls the swing of the lower leg from the straight position to the bent position. USE - Knee-joint prosthesis.