Prosthetic joint for knee and above-knee amputees

Prosthetic joint for knee and above-knee amputees, comprising a hollow shank (1), open at the top for receiving the femoral stump and, articulatedly joined to this shank, an attachment member (3) for fitting of a below-knee prosthesis (2), wherein the articulated joint comprises a guide member (5, 105), connected rigidly to the attachment member (3) and having rectilinear guide grooves (17a,17b;117a, 117b), a slide member (6,106) guided slidably in said guide member, a support (7, 107) guided shiftably in said slide member by means of arcuate guide bars (18a,18b;118a,118b), which support is connected rigidly to the shank (1), and a gearing located between the arcuate support (7, 107), on the one hand, and the guide member (5,105) on the other hand, the gearing consisting of an arcuate rack (8,108) on the support (7, 107), a rectilinear rack (10;110a,110b) on the guide member (5, 105) and a pinion (9, 109) rotatably mounted in the slide member (6, 106) and engaging the two racks (8,108;10,110a,110b), the gearing effecting a forward displacement of the slide member (6, 106) and, thereby, of the shank (1) upon a pivotal movement of the shank (1) relative to the attachment member (3).