Lower leg prosthesis with articulated knee, ankle and toe joints - has length of telescopic tibia element controlled by gas spring and knee joint spring biassed to unflexed position

摘要

The prosthetic leg is articulated at the knee, ankle and toes with the overall length being variable using a gas spring. A second gas spring returns the knee joint to the unflexed position. The prosthesis is fitted to the femoral stump using a cup-shaped casing which has a silicone elastomer internal wall and a reinforced polyester resin outer wall. The tibia of the prosthesis is formed by a pair of tubes which slide telescopically within one another without play and with the min. possible friction. The lower end of the lower tube is connected to part of the ankle joint.