http://www.ossur.com.au/lisalib/getfile.aspx?itemid=34169
UNITY™ SYSTEM OVERVIEW
The Unity™ System is designed to provide elevated vacuum for socket suspension.
рис. 1 поз. 6 на кожух не похоже - корпус с двумя клапанами и сопряжением с внешней мембраной
http://assets.ossur.com/lisalib/getfile.aspx?itemid=33281
the Unity Vacuum module... This device has a vacuum pump housed on a carbon-fiber ankle-foot device. The pump is positioned on the foot device and uses a heel-actuated membrane. The pump mechanism is located between two blades of the foot device.
When a patient places his or her heel on the ground, the frame moves upward and the support blade moves downward, thereby expanding the membrane between the blades. The expansion of the membrane draws air from the socket. Accordingly, as the membrane pump operates during stance phase, it removes air and moisture from the socket, creating a more intimate fit and improving patient safety. In addition, the vacuum pulls the prosthetic liner against the socket wall, preventing the constant positive pressure that causes volume loss.