Vacuum pump systems for prosthetic limbs and methods of using the same

A hybrid pump system that includes a prosthetic device that is adapted for suspension from a transfemoral residual limb comprising:

• a prosthetic device having a transfemoral receiving socket and a knee joint;
• a mechanically activated pump having pumping action that requires a mechanical input via movement of the prosthetic device;
• a separate electrically activated pump having an electrical power source and pumping action that requires an electrical input from the electrical power source;
• the mechanically activated pump and electrically activated pump being connected within a fluid circuit that evacuates air from the transfemoral limb receiving socket;
• wherein the mechanically activated pump is positioned between the transfemoral limb receiving socket and the knee joint;
• wherein the mechanically activated pump further comprises a first compression member coupled to a second compression member and a compressible bladder disposed between the first and second compression members;
• and
• wherein the mechanically activated pump further comprises coupling elements that engage and couple together the first and second compression members, and wherein all of the coupling elements are disposed about an outer perimeter of the compressible bladder.