# US 11,298,249 B2 · Prosthetic interface > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,298,249 B2 - Document ID: US11298249B2 - Status: Granted - Kind: B2 - Application number: 16/433,319 - Filed: 2019-06-06 - Published: 2019-12-12 - Granted: 2022-04-12 - Earliest claimed: 2018-06-07 - Assignees: Ossur Iceland Ehf - Applicants: Ossur Iceland ehf - Inventors: Martin Lund Størup; Rowan Cain; Linda Ros Birgisdottir; Hogna Hringsdottir; Sigurdur Asgeirsson; Stefan Orn Stefansson; Andri Orrason - Web page: https://patentgrep.com/patent/US11298249B2 ## CPC - A61F 2/80: Sockets, e.g. of suction type - A61F 2/7812: {Interface cushioning members placed between the limb stump and the socket, e.g. bandages or stockings for the limb stump} - A61F 7/10: Cooling bags, e.g. ice-bags - A61F 2002/5056: {Laminates, i.e. layered products} - A61F 2002/7818: {Stockings or socks for the limb stump} - A61F 2002/785: {Pads, e.g. relief pads} - A61F 2002/7875: {with releasable ratchets or pegs} - A61F 2002/802: {Suction sockets, i.e. utilizing differential air pressure to retain the prosthesis on the stump} - A61F 2002/807: {having a vacuum reservoir chamber} - A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C) ## Abstract A prosthetic interface includes a body portion having an open proximal end and a closed distal end including a distal cup. The body portion includes a membrane component having a flexible configuration defining an internal flow space extending along a length of the membrane component between an inner side arranged to face a skin surface of a residual limb and an outer side arranged to face away from the skin surface. At least one material coating is selectively applied to the membrane component that interacts with at least one of the membrane component and the distal cup to define at least one breathable region along the inner side that allows fluid flow between the internal flow space and the residual limb, and at least one impermeable region along the outer side that allows for vacuum suspension between the prosthetic interface and a prosthetic socket. ## Claims ### Claim 1 A prosthetic interface comprising: a body portion including a proximal end having an open configuration, and a distal end having a closed configuration, the body portion formed at least in part by a membrane component having a flexible configuration defining an internal flow space extending along a length of the membrane component between an inner side arranged to face a skin surface of a residual limb and an outer side arranged to face away from the skin surface, wherein the internal flow space is arranged to transport fluid through the membrane component and relative to the skin surface; a distal cup formed of a polymeric material at the distal end of the body portion; and at least one material coating selectively applied to the membrane component such that the at least one material coating interacts with at least one of the membrane component and the distal cup to define at least one breathable region along the inner side that allows fluid flow between the residual limb and the internal flow space, and at least one impermeable region along the outer side that allows for vacuum suspension between the prosthetic interface and a prosthetic socket; wherein the at least one material coating comprises a first material coating having a first surface applied to the inner side of the membrane component and defining a permeable region formed as an opening along the first material coating extending through a thickness defined between the first surface and a second surface opposite the first surface of the first material coating, and a second material coating applied to the second surface of the first material coating, wherein a portion of the second material coating passes completely through the permeable region and extends from the inner side through and to the outer side of the membrane component to define the at least one impermeable region protruding from the outer side; wherein the first and second material coatings are impermeable polymeric materials. ### Claim 2 (depends on 1) The prosthetic interface of claim 1, the at least one impermeable region comprises a sealing bridge of the polymeric material forming the distal cup extending through the internal flow space and between the distal cup and the outer side of the membrane component. ### Claim 3 (depends on 2) The prosthetic interface of claim 2, wherein the at least one impermeable region comprises a portion of the polymeric material forming the distal cup extending into the internal flow space via a plurality of voids formed in at least one material coating. ### Claim 4 (depends on 1) The prosthetic interface of claim 1, wherein the body portion comprises an elastomeric body portion having a wall portion and the at least one impermeable region comprises a same polymeric material as the distal cup and forming a portion of the wall portion and impregnating the membrane component. ### Claim 5 (depends on 1) The prosthetic interface of claim 1, wherein the distal cup is formed on the inner side of the membrane component. ### Claim 6 (depends on 1) The prosthetic interface of claim 1, wherein the distal cup is formed on the outer side of the membrane component. ### Claim 7 (depends on 6) The prosthetic interface of claim 6, comprising a textile cover positioned on an outer surface of the distal cup and arranged to reduce friction between the distal end of the body portion and the prosthetic socket. ### Claim 8 (depends on 7) The prosthetic interface of claim 7, wherein the at least one breathable region extends along an entirety of the inner side. ### Claim 9 (depends on 1) The prosthetic interface of claim 1, wherein the at least one breathable region comprises a first material coating of silicone applied to inner side of the membrane component and defining a plurality of voids in communication with the internal flow space. ### Claim 10 (depends on 1) The prosthetic interface of claim 1, wherein the at least one breathable region and the at least one impermeable region overlap one another along a longitudinal axis of the membrane component. ### Claim 11 (depends on 1) The prosthetic interface of claim 1, wherein the at least one breathable region extends in a proximal direction from the at least one impermeable region. ### Claim 12 (depends on 1) The prosthetic interface of claim 1, wherein the second material coating is silicone. ### Claim 13 A prosthetic socket system comprising: a prosthetic socket; a prosthetic interface adapted to provide an interface between a residual limb and the prosthetic socket, the prosthetic interface comprising: a body portion including a proximal end having an open configuration, and a distal end having a closed configuration, the body portion formed at least in part by a membrane component having a flexible configuration defining an internal flow space extending along a length of the membrane component between an inner side arranged to face a skin surface of a residual limb and an outer side arranged to face away from the skin surface, wherein the internal flow space is arranged to transport heat and fluid from the residual limb through the membrane component and away from the skin surface; a distal cup formed of a polymeric material at the distal end of the body portion; and at least one material coating selectively applied to the membrane component, wherein the at least one material coating interacts with at least one of the membrane component and the distal cup to define at least one breathable region along the inner side that allows the heat and moisture from the residual limb to move into the internal flow space, and at least one impermeable region along the outer side that allows for vacuum suspension between the prosthetic interface and the prosthetic socket; wherein the at least one material coating comprises a first material coating having a first surface applied to the inner side of the membrane component and defining a permeable region formed as an opening along the first material coating extending through a thickness defined between the first surface and a second surface opposite the first surface of the first material coating, and a second material coating applied to the second surface of the first material coating, wherein a portion of the second material coating passes completely through the permeable region and extends from the inner side through and to the outer side of the membrane component to define the at least one impermeable region protruding from the outer side; wherein the first and second material coatings are impermeable polymeric materials. ### Claim 14 (depends on 13) The prosthetic socket system of claim 13, wherein the second material coating is silicone.