Abstract: An artificial knee comprises first and second pivotally interconnected knee components and first and second interengaging brake components for locking the knee components together. The first and second brake components are associated respectively with the first and second knee components, respectively. The second brake component is made of a resiliently deformable material. The arrangement is such that, when the artificial knee is subjected to a first load condition, the brake components are substantially free to slide against one another, and when the artificial knee is under a second, higher load condition, the second brake component is resiliently deformed against the first brake component to lock the two brake components together, thereby locking the two knee components together.

Abstract: An artificial limb has an endoskeletal shin component which is of generally constant H-shaped cross section and is formed by injection molding from thermoplastics material. In a preferred embodiment, the limb has a foot keel which is integrally molded with the shin component. The keel also has upper flanges which are contiguous with anterior and posterior flanges of the shin component. Such a limb can be made light in weight yet strong in terms of resistance to transverse bending moments, and can be inexpensively produced. The constant cross section of the shin component allows it to be cut to a required length and clamped to an upper limb component.

Abstract: A unitary foot and shin component for a lower limb prosthesis has a one piece thermoplastic endoskeletal foot keel and shin member and a continuous flexible cosmesis. The cosmesis includes a resilient foot body which is molded directly onto the keel so as to embed the keel, and an integral flexible and hollow shell which surrounds the shin member but is spaced from it. By forming the foot body and the hollow shell as a single polyurethane molding, the foot and shin can be supplied as a single component, ready for connection to a stump socket and alignment coupling.