Otto Bock Orthopaedische Industrie Besitz- Und Verwaltungs-Kommanditgesel

Max Naeder

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. A flexible inner foot made of plastic foam extends into the toe region and is likewise enclosed by the skin-forming layer. The inner foot adjoins the front surface of the core and the front side of the heel wedge. The skin-forming layer is a soft, easily deformable plastic foam layer, the restoring forces of which are less than the restoring forces of the inner foot.

Artificial jointless foot

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.

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Duderstadt, Germany

Max Naeder