Abstract: A prosthetic foot includes a prosthesis body having a toe region disposed in a front part of the prosthetic foot, and a one-piece insert which is provided in the prosthesis body and which absorbs and transmits stresses imposed on the prosthesis body. The insert enables at least a plantar and dorsal deflection as well as axial compression of the prosthesis body, and has an approximately S-shaped design in the longitudinal section of the prosthetic foot. The insert includes a top horizontal section which forms a top edge of the prosthetic foot, and a bottom horizontal section which is of an extended construction compared with the top section and which has a free end which extends into the toe region of the prosthesis body, so that a high elasticity and a high energy storage capacity of the front part of the prosthetic foot are achieved. A front inclined section extends at an obtuse angle from the top section to form a rigid angular element.

Abstract: An artificial jointless foot comprises an incompressible core, preferably made of wood, the underside of which slopes upwards from the front to the rear and forms an upper connecting surface in the ankle region and which extends into the instep region of the foot with an extension decreasing in height towards the front, a heel wedge connected to the underside of the core and made of a soft plastic foam, with a skin-forming layer composed of a plastic foam and completely surrounding the arrangement comprising the core and heel wedge, with the exception of an upper connecting surface. The foot has good movement properties, while at the same time being of simple design and having desirable flexibility in the instep region. The core, beginning from its front edge on the connecting surface, extending into the instep region by an amount corresponding to less than half its length on the connecting surface.

Abstract: A jointless prosthetic foot having a resilient foot insert, which is provided inside the prosthesis body, absorbs and transmits the prosthetic stresses, and which has a top horizontal section, forming the top edge of the prosthetic foot and offering a connection possibility with the prosthesis, and a bottom section which is of extended construction compared to the top section and extends with its free end into the toe region to achieve high elasticity for the front part of the foot in conjunction with high energy storage capacity when the front part of the foot is stressed, has at least a plantar flection and a dorsal flection, the top section and the bottom section enclosing a top and bottom angle respectively with the oblique Z-bar and delimiting rear and front wedge-shaped cavities respectively.

Abstract: An artificial jointless foot comprises a wooden core forming an upper connecting surface with an elastic synthetic material connected to the wooden core for forming the foot shape and guaranteeing a flexible rolling action. The wooden core forms, on the connecting surface, a dorsal stop for an adaptor connectable to the stop. Deformation of the connecting surface in the region of the dorsal stop is prevented, even when wood not resistant to such load is used for the wooden core. The wooden core has, in the region of the dorsal stop, a recess open at the top and filled with a duroplastic cast resin, the surface of which is in line with the connecting surface.

Abstract: An inner conical recess fitting (1) which is connectable to the prosthesis and is intended for receiving a stump (17) of an amputated extremity can be fitted directly to the stump (17) without the aid of modeling in the following procedural steps: to mold the inner conical recess, a plastic which is shrinkable through the action of external influences, such as heat, is selected; a tube (14) which is made of this plastic and is open at at least one end and has a smaller diameter and a smaller length than the inner conical recess fitting (1) to be manufactured is extended and stretched, so that it has in every direction a greater dimension than the inner conical recess fitting (1) to be manufactured; and the widened and stretched molded piece (10) is placed on the stump (17) and is made to shrink through, e.g., application of heat at selected locations, until the fitting bears everywhere securely against the stump.

Abstract: An inner hand as an orthopedic fitting part of thermoplastic for accommodating a hand mechanism is disclosed. The inner hand has an annular groove which is made on the end portion of the hand and into which a ring which fixes the inner hand on the hand mechanism is inserted. To improve the functioning of the inner hand, a two-component sandwich design is proposed, the utilization region of at least the thumb and index finger being harder than the remaining hand element.

Abstract: An inner conical recess fitting (1) which is connectable to the prosthesis and is intended for receiving a stump (17) of an amputated extremity can be fitted directly to the stump (17) without the aid of modeling in the following procedural steps: to mold the inner conical recess, a plastic which is shrinkable through the action of external influences, such as heat, is selected; a tube (14) which is made of this plastic and is open at at least one end and has a smaller diameter and a smaller length than the inner conical recess fitting (1) to be manufactured is extended and stretched, so that it has in every direction a greater dimension than the inner conical recess fitting (1) to be manufactured; and the widened and stretched molded piece (10) is placed on the stump (17) and is made to shrink through, e.g., application of heat at selected locations, until the fitting bears everywhere securely against the stump.

Abstract: An arrestable knee joint, comprising a thigh member; a lower leg member; rotatably articulated on the thigh member to form a knee joint; and a mechanism for releasably arresting the members in the extended position, comprising a spring-loaded arresting element mounted in the lower leg member, structure associated with the thigh member for engaging the arresting element when the members are in the extend position, a rocker arm assembly having a first arm attached to the arresting element and a second arm extending away from a rotational axis of the rocker arm assembly on a side opposite from the first arm, and a Bowden wire inserted into the lower leg member and attached to the second arm of the rocker arm assembly. A release mechanism is provided in the thigh member.