Perforated liner

• US 10,639,173 B2
• Filed: 07/21/2015
• Issued: 05/05/2020
• Est. Priority Date: 07/23/2014
• Status: Active Grant

• Current Assignee: Uniprox GmbH & Co. KG (Bauerfeind AG)
• Original Assignee: Uniprox GmbH & Co. KG (Bauerfeind AG)
• Inventors: Walter, Dennis
• Primary Examiner(s): Bahena, Christie L
• Application Number:
  US15/315,537
• Publication Number:
  US 20170239070A1
• Time in Patent Office: 1,750 Days
• CPC Class Codes: A61F 2/78 Means for protecting prostheses or for attaching them to the body, e.g. bandages, harnesses, straps, or stockings for the limb stump
• CPC Class Codes: A61F 2/7812 Interface cushioning members placed between the limb stump and the socket, e.g. bandages or stockings for the limb stump
• CPC Class Codes: A61F 2002/7818 Stockings or socks for the limb stump
• CPC Class Codes: A61F 2002/785 Pads, e.g. relief pads
• CPC Class Codes: A61F 2002/802 Suction sockets, i.e. utilizing differential air pressure to retain the prosthesis on the stump

Abstract

The invention concerns a prosthesis liner for application to a limb stump, with an elastic liner layer (20) of elastomer, wherein the liner layer (20) has pores (26) in at least one distal portion (30) thereof.

Claims

1. Prosthesis liner for application to a limb stump, with an elastic liner layer of elastomer, wherein the liner layer has pores in at least one distal portion thereof, wherein the pores are closed in a relaxed state of the liner layer and become opened by stretching of the liner layer on the limb stump during movement.

2. Prosthesis liner according to claim 1, wherein the pores can produce an at least temporary gas-permeable and moisture-permeable connection between the inside of the liner facing the stump and the outside of the liner upon stretching of the liner layer.

3. Prosthesis liner according to claim 1, wherein a textile material is arranged on the outside of the liner layer, said textile material being specially designed to enable gas exchange at the pores and/or to take up moisture emerging from the pores.

4. Prosthesis liner according to claim 3, wherein the textile material is physically separate and can be removed from the liner layer.

5. Prosthesis liner according to claim 3, wherein the textile material is connected to the liner layer.

6. Prosthesis liner according to claim 1, wherein the pores are arranged in the liner layer in a mean density of 2 to 20 per cm².

7. Prosthesis liner according to claim 1, wherein the pores are not present in a proximal portion of the liner.

8. Prosthesis liner according to claim 1, wherein the elastomer is selected from a group consisting of silicone elastomer and polyurethane elastomer.

9. Prosthesis liner according to claim 1, wherein the pores are slits formed in the liner layer by a chipless process selected from a group consisting of slitting and piercing.