Patent ID: 9610177
Date: 2017-04-04
CPC Classifications: A61F

Claim:
1. A vacuum unit, for sucking out the air inside a prosthetic socket by means of ankle movements and which can be used as an ankle of a prosthetic leg, the vacuum unit comprising: an upper body with a front angular volume angled such that it shall allow an angular movement of a front side of a bottom face facing towards a lower body in order to increase a piston movement range, the upper body having a piston head inside it located on an ankle shaft, the upper body having a rear angular volume which allows the angular movement of a rear side of the bottom face, facing the lower body; wherein the lower body is capable of moving angularly in relation to the upper body and is located below the ankle shaft; a forked chain link pushed by a lower body chain link when a lower body connection gets closer to an upper body connection, wherein, the forked chain link moves upwards during a pushing motion, as one end of the forked chain link is connected to the upper body; a piston chain link that pushes the piston head in order to convert the upwards movement of the forked chain link into a linear motion that shall move the piston head upwards.