Patent ID: 6669737
Filing Date: 2003-12-30
Classification: A61F

Abstract:
A resilient foot insert for an artificial foot, comprising:at least two springs which are connected to one another and which together in side view, in an unloaded state, enclose an approximately triangular spring deflection space, an upper spring of said at least two springs is approximately roof-shaped defines a roof top area, an adapter attachment positioned in the roof top area, a heel spring which extends downward in a concave curve into a heel area, a forefoot spring which extends downward in a concave curve into a forefoot area, one bare spring extension of said heel spring and one bare spring extension of said forefoot spring being fixedly connected to a separate, flexurally rigid base spring which delimits a bottom of the spring deflections space and which interacts with a rolling contour in such a way that, at the start of loading of the forefoot area during walking in a heel-to-toe fashion, a force is first introduced in an area of a ball of a foot, with the forefoot spring and the base spring configured in terms of shape and flexural elasticity in such a way that said base spring is bent contrary to the concave curve of the forefoot spring and, under an effect of an increasing load in the forefoot area, the forefoot spring and base spring successively bear against one another in said forefoot area by the base spring now being bent in the opposite direction to its previous bending.