Abstract: An adjustable lower limb prosthesis has a pylon connected to both a prosthetic foot and to the stump adapter by way of a foot/pylon joint and a pylon/stump joint, respectively. Each of the joints is similar and includes a tapered socket holding a truncated conical wedge sleeve. The wedge sleeve has a bore which may be angled with respect to the cone axis, and into which the pylon is fitted. A cap locks the wedge sleeve in the bore and locks the pylon in the wedge sleeve. For adjusting the prosthesis, a set of wedge sleeves are available to the prosthetist, each having a bore with a different offset with respect to the conical axis of the sleeve. The prosthetist selects the appropriate sleeve based upon a prior determination using a temporary pylon and an alignment adapter. The correct foot wedge sleeve and circumferential alignment of the wedge sleeve are set with the aid of discs having offset holes.

Abstract: An artificial foot includes a hollow, rigid, compression-molded composite keel made from aramid fiber-reinforced plastic for connection to a prothesis and to an improved composite carbon-fiber material acting as a spring for improving the energy absorbing and releasing characteristics of the foot to aid movement of the amputee. The spring includes a pair of thin, forwardly-extending composite spring members capable of lateral movement with respect to each other and connected to the keel. An auxiliary deflection spring or plate is interposed between the primary deflection plate and the keel and includes a forwardly-extending upwardly-oriented portion to aid in energy absorption and release during flexing of the foot. The plates are surrounded by a suitable abrasion resistant material, such as a Kevlar sock, surrounded by a low density flexible foam urethane. A medium density flexible foam urethane wedge is interposed beneath the heel portion of the keel.

Abstract: An improved construction and method of making an artificial foot characterized by a rigid keel portion comprising a molded plastic material having a metal reinforcing strip imbedded within said plastic keel portion near the lower surface thereof. This keel portion is surrounded by a typical flexible foamed plastic material molded to said keel to form the outer surface of the foot. Preferably the reinforcing strip includes a metal receiver fixed to the strip and also is imbedded within the rigid keel to receive connecting means to attach the foot to the remainder of the prosthetic leg portion.