Abstract: Within its plantar area, the artificial foot for a leg prosthesis is provided with a plate-shaped reinforcing member (10) embedded in the molded foot part. The member 10 includes two superimposed upper and lower leaf springs (15a, 15b) possessing different lengths, between which a carbon fiber-reinforced plastic leaf spring (18) is disposed extending. The latter extends into the ball of the foot area and is offset at the front end. Sliding inserts (17a, 17b) of polyethylene and each face of the plastic leaf spring and between the upper and lower leaf springs produce a constant metatarsal elasticity even during continuous stress.

Abstract: An artificial knee joint (10) with a clamping member (13) is provided with a peg (11) for attachment to a thigh shaft (12). The clamping member is pivotable against a braking member or barrel (19) located inside the knee joint housing when a vertical load (44) is applied to the knee joint to arrest the swiveling movement a leg part (26). The leg part accommodates the lower leg tube of a leg prosthesis as well as a traction strap (36) impelling the knee joint back into the straightened position. By this means an uncontrolled buckling of the artificial knee joint is prevented in the event that a prosthesis wearer stumbles.

Abstract: Within its plantar area the artificial foot for a leg prosthesis is provided--embedded within the molded foot portion--with a plate-shaped reinforcing member (10) that consists of two superposed leaf springs (10a, 10b) of approximately equal length which are configured so as to conform to the rolling profile of the foot, as a result whereof an improved metatarsal elasticity is obtained.