A vacuum unit

A vacuum unit, for sucking out the air inside a carrying shell by means of ankle movements and which can be used as the ankles of prosthesis legs, the vacuum unit comprising:

• an upper body with a front angular volume angled such that it shall allow the angular movement of the front side of the bottom face facing towards an lower body—in order to increase the 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 the rear side of the bottom face, facing the lower body;
• the lower body capable of moving angularly in relation to the upper body located below the ankle shaft;
• a forked chain link pushed by the lower body chain link when the lower body connection gets closer to the upper body connection, the forked chain link that moves upwards as one end of the forked chain link is connected to the upper body during the pushing motion;
• a piston chain link that pushes the piston head in order to convert the upwards movement of the forked chain linked into a linear motion that shall move the piston head upwards.