Patent ID: 9498352
Filing Date: 2016-11-22
CPC Classification: A61F,Y10T

Claim Text:
1. A method for producing an artificial foot which, in a longitudinal direction, has a medial plane in which a nominal foot length is defined as a distance from a heel to a foot tip of a natural foot replaced by the artificial foot, and which is designed with a top connector piece for the torsionally rigid connection of a foot insert extending substantially along the length of the foot, and which, seen along the length, bears on two contact surfaces of the artificial foot, of which a first heel-side contact surface is located in a heel area and a second ball-side contact surface is located in a ball area, and which is designed such that the top connector piece is connected to the contact surfaces of the foot part by spring connections, the method comprising: a) designing the contact surfaces to an approximately linear contact surface on a support, b) positioning a body vector as a resulting force vector of the ground reaction forces occurring on the contact surfaces in the rest state at a location along the artificial foot in a range between 40% and 48% of the nominal foot length, measured from the heel, c) loading the foot with weight loads between 25% of a lower nominal weight and 80% of an upper nominal weight from body weight along a coordinate arranged perpendicular to the support while in a standing position, and d) adapting the spring connections between the top connector piece and the contact surfaces in such a way that, during the loading according to step c), the body vector shifts by less than ±4% of the nominal foot length; wherein the foot insert contains a joint such that when the pivot point of the joint is placed in the body vector in the rest state of the artificial foot the joint, upon loading, permits an elastically damped rotation of the top connector piece relative to the heel-side contact surface without a change of length in a direction of gravity.