Date of download: 10/11/2017 Copyright © ASME. All rights reserved. From: Evaluation of a Prototype Hybrid Vacuum Pump to Provide Vacuum-Assisted Suspension for Above-Knee Prostheses J. Med. Devices. 2015;9(4):044504-044504-4. doi:10.1115/1.4030507 Figure Legend: Location of the hybrid vacuum pump for use within a transfemoral prosthesis. Pyramid adaptors fixed to proximal and distal ends of the pump housing were used for installation of the pump between the socket and knee joint, respectively.