Prosthetic suspension device
View Patent ↗A prosthetic suspension device having a positioning element, a coupling element, and a friction-reducing element to facilitate movement of the positioning element towards the coupling element. The positioning element is adapted to maneuver an inner socket of a prosthesis into an outer socket of a prosthesis. The coupling element is configured to receive the positioning element and restrict movement thereof.
1. A suspension device for use with a prosthesis having an inner socket and an outer socket, the suspension device comprising:
a positioning element coupled to the inner socket and adapted to maneuver the inner socket to align the inner socket with the outer socket, the positioning element having a gripping portion with a substantially rectangular cross-section and a varied surface contour; and
a coupling element mounted to the outer socket and adapted to receive the gripping portion to removably couple the inner socket with the outer socket, wherein the coupling element includes a ratchet mechanism having a lever configured to incrementally drive the gripping portion through the coupling element upon pivoting the lever, thereby restricting movement of the positioning element relative to the outer socket.
2. The suspension device of claim 1 , wherein the gripping portion is deformable to accommodate pressure applied by the coupling element.
3. The suspension device of claim 1 , wherein the gripping portion includes angled teeth configured to mate with the coupling element.
4. The suspension device of claim 1 , wherein the positioning element includes an elongate strap, the gripping portion being selectively positionable along the elongate strap.
5. The suspension device of claim 1 , wherein the positioning element is configured to couple to a distal end of the inner socket.
6. The suspension device of claim 1 , wherein the positioning element is configured to couple to opposing sides of the inner socket.
7. The suspension device of claim 1 , wherein the positioning element is integrally formed with the inner socket.
8. The suspension device of claim 1 , wherein the positioning element is configured to pass through an intermediate socket positioned between the inner socket and the outer socket.
9. The suspension device of claim 1 , wherein the positioning element is configured to pass from inside the outer socket to outside the outer socket through an opening in a distal end of the outer socket, and the coupling element is mounted to an external surface of the outer socket adjacent a proximal end of the outer socket.
10. The suspension device of claim 9 , further comprising a friction reducing element configured to direct the positioning element toward the coupling element, and to reduce friction between the positioning element and the outer socket when selectively securing the positioning element to the coupling element.
11. The suspension device of claim 10 , wherein the friction reducing element is positioned adjacent the opening in the distal end of the outer socket.
12. The suspension device of claim 11 , wherein the positioning element is configured to pass under the friction reducing element and then upwards alongside the external surface of the outer socket when selectively securing the positioning element to the coupling element.
13. The suspension device of claim 1 , wherein the lever is configured to move to a secured position in which movement of the positioning element relative to the coupling element is restricted and the lever generally conforms to a contour of the outer socket.
14. The suspension device of claim 1 , wherein the lever includes a plurality of teeth that mate with a plurality of teeth on the gripping portion upon pivoting the lever, thereby driving the extension through the coupling element.
15. The suspension device of claim 1 , wherein the coupling element is secured adjacent a proximal end of the outer socket.
16. The suspension device of claim 1 , the suspension device further comprising:
a friction-reducing element configured to direct the positioning element toward the user, the friction-reducing element being adapted to reduce frictional resistance against movement of the positioning element.
17. The suspension device of claim 16 , wherein the friction-reducing element is positioned adjacent an exterior surface of the outer socket.
18. The suspension device of claim 17 , wherein the friction-reducing element is configured to rotate.
19. The suspension device of claim 17 , wherein the friction-reducing element has a lower coefficient of friction than the outer socket.
20. The suspension device of claim 17 , wherein the friction-reducing element is substantially cylindrical.
21. The suspension device of claim 17 , wherein the friction-reducing element includes one or more pulleys.