Suspension liner with seal
View Patent ↗A suspension liner sleeve providing an interface between a residual limb and a hard prosthetic socket includes a resilient seal element extending around its outer periphery to enhance a sealing effect between the sleeve and the interior of a prosthetic socket to isolate the distal end of the socket from atmosphere after the sleeve with a residual limb has been inserted within the socket and to thereby improve the retention of the liner sleeve and the residual limb in the prosthetic socket.
1. A prosthesis system comprising:
a suspension liner sleeve adapted to provide an interface between a residual limb and a prosthetic socket, said liner sleeve having an elongate, generally conical body portion formed of a material that is at least radially extendible from a relaxed non-extended condition and including proximal and distal end areas;
at least one recessed portion extending around at least one peripheral portion-of the liner sleeve body portion between said proximal and distal end areas;
at least one resilient seal element outwardly protruding from the liner sleeve body portion, the at least one resilient seal element having a first end portion secured within the at least one recessed portion and a second end portion arranged for deflection into or within the at least one recessed portion;
and a prosthetic socket configured to receive said liner in close fitting relationship when the liner sleeve body portion is disposed on a residual limb, said at least one resilient seal element bridging any gap between said liner sleeve body portion and an interior wall of said socket in the area of the at least one resilient seal element.
2. The prosthesis system as claimed in claim 1 , said socket including an evacuation device enabling evacuation of air between the distal end area of said liner sleeve body portion and said socket after the liner sleeve body portion has been inserted within said socket to an extent such that said resilient seal element bridges any gap between the liner sleeve body portion and an interior wall of said socket.
3. The prosthesis system as claimed in claim 1 , wherein said at least one resilient seal element is integrally formed in one piece with the liner sleeve body portion.
4. The prosthesis system as claimed in claim 1 , wherein said at least one resilient seal element is a separate seal body attached to the liner sleeve body portion.
5. The prosthesis system as claimed in claim 1 , wherein said liner sleeve body portion includes a reinforcement material associated with the liner sleeve body portion and extending over a length at least coinciding with the location of the at least one resilient seal element and at least in a proximal direction relative to said resilient seal element, said reinforcement material providing greater elastic stiffness in an axial direction relative to a radial direction of the lower liner sleeve body portion.
6. The suspension liner sleeve as claimed in claim 1 , wherein said liner sleeve body portion includes a reinforcement material associated with the liner sleeve body portion extending over a length at least coinciding with the location of said at least one resilient seal element and at least in a distal direction relative to said resilient seal element, said reinforcement material providing greater elastic stiffness in an axial direction relative to a radial direction of the liner sleeve body portion.
7. The prosthesis system as claimed in claim 1 , said prosthetic socket having an interior wall including at least one stepped portion located peripherally along the interior wall at a location where the at least one resilient seal element is located when the suspension liner sleeve body portion is fully inserted in the prosthetic socket.