Prosthetic liner and prosthetic shaft system comprising prosthetic liner and prosthetic shaft

Patent metadata

Field	Value
Publication number	US-10603192-B2
Application number	US-201414895254-A
Country	US
Kind code	B2
Filing date	May 30, 2014
Priority date	Jun 3, 2013
Publication date	Mar 31, 2020
Grant date	Mar 31, 2020

Abstract

A prosthetic liner for application on a stump, comprising an elastic base, which has a proximal opening for insertion of the stump in a receiving space, and a distal end. At least one pneumatic piston is arranged on the outer face of the prosthetic liner.

First claim

The invention claimed is:

1. A prosthetic liner for application on a stump, comprising:
an elastic base body which has a proximal opening for insertion of the stump into a receiving space, and a closed distal end;
at least one pneumatic piston being attached to an exterior surface of the base body at the closed distal end, the at least one pneumatic piston and the elastic base body together because of the attachment being insertable into and removable from a prosthetic socket and movable within the prosthetic socket to generate a vacuum condition during reciprocal movement of the elastic base body and piston within the socket, the elastic base body and piston remaining attached during the reciprocal movement, the at least one piston comprising a one way valve to prevent a reverse flow of air to the base body.

2. The prosthetic liner as claimed in claim 1 , wherein the at least one pneumatic piston is reversibly attached at the distal end.

3. The prosthetic liner as claimed in claim 1 , further comprising a dimensionally stable end cap positioned on the exterior surface of the base body at the distal end.

4. The prosthetic liner as claimed in claim 3 , wherein the at least one pneumatic piston is formed as a separate component and is attached to the end cap.

5. The prosthetic liner as claimed in claim 1 , wherein the at least one pneumatic piston has at least one circumferential sealing element.

6. The prosthetic liner as claimed in claim 1 , wherein the at least one pneumatic piston is movably attached to the prosthetic liner.

7. The prosthetic liner as claimed in claim 1 , wherein the at least one pneumatic piston is attached to the prosthetic liner via a ball joint or an elastic connection.

8. The prosthetic liner as claimed in claim 1 , wherein the at least one pneumatic piston is attached to the prosthetic liner via at least one magnet.

9. The prosthetic liner as claimed in claim 8 , wherein the at least one pneumatic piston is connectably integrated via at least one magnet into a prosthetic socket system composed of the prosthetic liner and a prosthetic socket.

10. The prosthetic liner as claimed in claim 8 , wherein the at least one pneumatic piston has an at least partially spherical surface.

11. The prosthetic liner as claimed in claim 8 , further comprising an attachment element arranged on the prosthetic liner, via which the at least one pneumatic piston is attached to the prosthetic liner and which has a contact surface formed to correspond to an at least partially spherical surface of the at least one pneumatic piston.

12. The prosthetic liner as claimed in claim 1 , wherein the at least one pneumatic piston is positively attached directly to the exterior surface of the base body at the closed distal end, or is positively attached to the exterior surface of the base body with an intervening member.

13. A prosthetic socket system comprising:
a prosthetic liner configured to mount to a residual limb, the prosthetic liner comprising an elastic base body which has a proximal opening for insertion of the residual limb into a receiving space, and a closed distal end;
a prosthetic socket, comprising:
an internal cavity configured to receive the residual limb to which the prosthetic liner has been mounted, an intermediary space being provided within the internal cavity between the prosthetic socket and the prosthetic liner;
a receiving member having a cylinder region and an outlet valve in flow communication with the cylinder region, the cylinder region having an open proximal end and closed distal end;

at least one pneumatic piston being attached to an exterior surface of the prosthetic liner at the closed distal end, the at least one pneumatic piston and the prosthetic liner together being insertable with the residual limb into the prosthetic socket to position the prosthetic liner in the internal cavity and the at least one pneumatic piston within the cylinder region, the prosthetic liner and the at least one pneumatic piston being movable together as an attached assembly to generate a vacuum condition;
a return valve in flow communication with the intermediary space;
the cylinder region receives the at least one pneumatic piston and the at least one pneumatic piston slides along an inner surface of the cylinder region when the prosthetic liner is connected to the prosthetic socket, a closed volume being formed between the at least one pneumatic piston and the distal end of the cylinder region, the closed volume being in flow communication with the return valve, the return valve being operable to permit a flow of air from the intermediary space into the closed volume and prevent a reverse flow of air into the intermediary space.

14. The prosthetic socket system as claimed in claim 13 , wherein the closed volume has a fluidic connection to the outlet valve, which enables an outflow of air from the closed volume and prevents a reverse flow into the closed volume.

15. The prosthetic socket system as claimed in claim 13 , wherein at least one of the closed volume and the intermediary space are fluidically connected to ambient air.

16. The prosthetic socket system as claimed in claim 13 , wherein the return valve is arranged in the at least one pneumatic piston.

17. The prosthetic socket system as claimed in claim 13 , wherein the cylinder region has an insertion bevel at its proximal end.

18. The prosthetic socket system as claimed in claim 13 , wherein a pull-out safety for the at least one pneumatic piston is arranged at the proximal end of the cylinder region.

19. The prosthetic liner as claimed in claim 13 , wherein the return valve is positioned in the receiving member.

20. The pneumatic socket system as claimed in claim 13 , wherein the prosthetic liner and the at least one pneumatic piston are movable together as an attached assembly to generate a vacuum condition during reciprocal movement of the elastic base body and at least one pneumatic piston within the socket, the elastic base body and at least one pneumatic piston remaining attached during the reciprocal movement.

21. A prosthetic liner for application on a residual limb, comprising:
an elastic base body, comprising:
a receiving space configured to receive the residual limb;
a proximal opening for insertion of the residual limb into the receiving space;
a closed distal end;
an attachment element attached to an exterior surface of the elastic base body;

a pneumatic piston releasably mounted to the attachment element with an attachment, the pneumatic piston, the attachment element and the elastic base body together as an assembly being insertable with the residual limb into a prosthetic socket to position the elastic base body and the attachment element in an internal cavity of the prosthetic socket and position the pneumatic piston within a cylinder carried by the prosthetic socket, the assembly being movable relative to the prosthetic socket and cylinder to generate a vacuum condition during reciprocal movement of the elastic base body and pneumatic piston within the socket, the elastic base body and pneumatic piston remaining attached during the reciprocal movement.

22. The prosthetic liner as claimed in claim 21 , wherein the pneumatic piston includes a one way valve to prevent a reverse flow of air to the base body.

23. The prosthetic liner as claimed in claim 22 , further comprising at least one magnet operable to releasably connect the pneumatic piston to the attachment elemen

Assignees

• Bock Healthcare Gmbh
• Ottobock Se & Co Kgaa

Inventors

• Muller Andre

Classifications

• A61F2/80 Primary

  Sockets, e.g. of suction type · CPC title

• A61F2210/0057

  stretchable · CPC title

• A61F2002/805

  having an air valve · CPC title

• A61F2210/009

  magnetic · CPC title

• A61F2002/807

  having a vacuum reservoir chamber · CPC title