Patent ID: 11918493
Assignee: NORTHWESTERN UNIVERSITY
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 11:
12. A prosthetic liner apparatus for improving suspension and rotation control between a residual limb and a socket of a prosthesis, comprising:
a liner body having a shape configured to receive the residual limb and having an outer surface that fits within the socket; wherein at a proximal end of the liner body, the outer surface of the liner body includes at least an exposed smooth elastomeric region that fits within and seals with the socket;
a prosthetic sock having a textile sock portion having inner and outer surfaces covered by an elastomeric membrane and being configured to receive the liner body and to have the outer surface of the prosthetic sock fit within the socket, and having a plurality of intermittent and incomplete raised elastomeric grips located on the elastomeric membrane that covers the inner and outer surfaces of the textile sock portion, so as to extend inward and outward from the prosthetic sock;
wherein when the socket is subjected to passive suction or active vacuum, the raised elastomeric grips are held securely against the socket; and
wherein the plurality of intermittent and incomplete raised elastomeric grips form a chevron pattern.