Patent ID: 7144429

Claim:
A seal for sealing a distal portion of a residual limb within a cup-shaped air tight prosthetic socket comprising: a base having proximal and distal ends adapted to be pulled onto a residual limb and to enclose at least a portion of a residual limb peripherally; at least one sealing lip having a root and a flexibly compliant sealing edge that is spaced from the root and is arranged so as to hermetically rest against an inner wall area of a prosthetic socket and which is affixed by its root to the base; said sealing lip open to ambient air between its connection with the base and its sealing edge; said lip extending along a longitudinal direction of the base from the distal end towards the proximal end thereof and diagonally diverging therefrom at least in part in a direction towards the proximal end of the base; wherein the base and sealing lip are annular.