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US 7,144,429 B2Granted
Seal arrangement for residual limb prosthetic socket
AssigneeOssur Hf
InventorFelix Carstens
Life of this patent
Estimating the term…
Abstract
A prosthetic socket seal includes at least one radially projecting sealing lip which jointly with a base subtends an annular gap. This annular gap is vented on a proximal side by the external atmosphere, resulting in creation of a pressure gradient at the sealing lip that produces stronger compression of the sealing lip against the prosthetic socket with increasing partial vacuum on a distal side of the sealing lip.
Claims16
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.
2 more elements
Dependencies are inferred from the claim text.