Patent ID: 8668744

Claim:
A suspension device for a lower limb prosthesis comprising: an air-impermeable socket shaped to receive a residual limb portion, the socket having an inner surface and an outer surface, a distal end and a proximal end, the proximal end being open and surrounded by a peripheral socket edge, a flexible liner formed of an impermeable material and shaped and dimensioned to be located between the inner surface of the socket and the residual limb portion when the socket is fitted to the residual limb portion, wherein the liner has an inner surface and an outer surface and at least a part of the liner has unfilled perforations therethrough so as to allow transmission of air and moisture between the inner and the outer surface thereof, and a sealing member at the peripheral socket edge to form a seal between the socket and the residual limb portion when the socket is fitted to the residual limb portion, and wherein the socket has an evacuation port in communication with the perforations of the liner and a non-return valve in communication with the evacuation port, which valve is oriented so as to maintain a vacuum generated inside the socket.