Patent ID: 8317876
Filing Date: 2012-11-27
Classification: A61F

Abstract:
1. An artificial foot comprising: a connecting part configured for connection to a lower leg part; a forefoot part; an upper coupling element pivotably connecting the connecting part and the forefoot part by means of first and second pivot joints, respectively; and a lower coupling element pivotably connecting the connecting part and the forefoot part by means of third and fourth pivot joints, respectively, such that throughout a walking process an angular position of the connecting part continuously controls an angular position of the forefoot part, whereby coupling of the forefoot part to the connecting part consists of a four-joint arrangement composed of said first and second pivot joints and said third and fourth pivot joints, wherein the lower coupling element extends from the forefoot part and past the connecting part to define a heel end of the artificial foot and wherein the lower coupling element is pivotably connected to the connecting part at the third pivot joint and is pivotably connected to the forefoot part at the fourth pivot joint located below the second pivot joint such that upon the application of a ground resistance force on the heel end, the lower coupling element exerts a torque on the forefoot part and causes the forefoot part to pivot upward, wherein one of the coupling elements is adjustable in length.