A prosthetic limb comprises a socket for receiving a patient's residual limb, and an upright assembly. The socket includes a base provided in its distal end. The base includes a chamber therewithin and an channel for providing fluid communication between the chamber and the interior of the socket. A...http://www.google.com/patents/US6287345?utm_source=gb-gplus-sharePatent US6287345 - Valve assembly for a prosthetic limb
