The device consists of a femoral support (1) and a tibial support (2) joined together by means of a lateral hinge and one or two medial hinges. Pins (1.5, 1.6, 1.7, 1.8) and openings (1.9, 1.10) present on the rounded distal end of each femoral arm (1.1, 1.2) and the openings (2.4, 2.5, 2.6) and pins (2.7, 2.8) present on the rounded proximal end of each tibial arm (2.1, 2.2) make up the lateral hinge and a proximal medial hinge. The medial tibial arm can be divided in two parts: a fixed medial tibial arm (2.12) connected to the tibial plate (2.11) and a free-moving medial tibial arm (2.13) secured to the fixed medial tibial arm (2.12) by means of a distal medial hinge. The pins (1.5, 1.6, 1.7, 1.8, 2.15, 2.17) are secured to plates (4, 5). The device can break down the load on mechanical components thus avoiding weight bearing on deficient structures as a result of pathologies or traumas.