ROTATABLE PROSTHETIC ADAPTER

• US 20110015761A1
• Filed: 07/19/2010
• Published: 01/20/2011
• Est. Priority Date: 07/17/2009
• Status: Active Grant

• Current Assignee: Medex International, Inc.
• Original Assignee: Medex International, Inc.
• Inventors: Celebi, Dogan, Celebi, Hadiye Pinar
• Granted Patent: US 9,198,778 B2
• Time in Patent Office: Days
• US Class Current: 623/32
• CPC Class Codes: A61F 2/60 Artificial legs or feet or parts thereof
• CPC Class Codes: A61F 2/76 Means for assembling, fitting or testing prostheses, e.g. for measuring or balancing, e.g. alignment means
• 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 2/80 Sockets, e.g. of suction type
• CPC Class Codes: A61F 2002/5016 adjustable for implantable prostheses A61F2002/30537
• CPC Class Codes: A61F 2002/5084 telescopic adjusting length A61F2002/502
• CPC Class Codes: A61F 2002/7875 with releasable ratchets or pegs snap connections A61F2002/305; pushing a peg into a hole A61F2002/30331

Abstract

The present invention is directed to a prosthetic adapter that allows for rotation of a prosthetic about central axis. In one embodiment, the invention is a prosthetic adapter comprising: a first component adapted to be coupled to a residual limb; a second component adapted to be coupled to a prosthesis; the first component or the second component comprising a collar forming a central cavity formed about a first central axis; the other one of the first component or the second component comprising a hub extending along a second central axis, the hub positioned in the central cavity so that the first and second central axes are substantially coaxial; wherein when the hub is positioned within the central cavity of the collar, the hub has only two degrees of freedom, rotation about the first central axis and translation along the first central axis.

Claims

1. A prosthetic adapter comprising:

a first component adapted to be coupled to a residual limb;

a second component adapted to he coupled to a prosthesis, the first and second components adapted to be repetitively coupled and separated from one another;

the first component or the second component comprising a collar having an outer surface and an inner surface, the inner surface forming a central cavity about a first central axis;

the other one of the first component or the second component comprising a body portion and a cylindrical hub extending from the body portion along a second central axis, the cylindrical hub positioned in the central cavity so that the first and second central axes are substantially coaxial; and

an anti-rotation member adjustable between;

(1) a first state in which the anti-rotation member does not obstruct the cylindrical hub from being translated along the first central axis out of the central cavity;

(2) a second state in which the anti-rotation member prohibits the cylindrical hub from being translated along the first central axis out of the central cavity while allowing the cylindrical hub to rotate within the central cavity of the collar about the first central axis; and

(3) a third state in which the anti-rotation member prohibits the cylindrical hub from being translated along the first central axis out of the central cavity of the collar and prohibits rotation of the cylindrical hub within the central cavity of the collar about the first central axis.

5. The prosthetic adapter of claim 1 further comprising:

a sleeve assembly having a cavity in which the residual limb nests, the sleeve assembly comprising a pin extending therefrom, the first component comprising the collar and fixed to the sleeve assembly so that the pin extends through the central cavity of the collar along the first central axis.

6. The prosthetic adapter of claim 5 wherein the sleeve assembly further comprises a flexible liner and a socket, and wherein the first component comprises a cup-shaped flange extending from a top edge of the collar forming a cup-shaped depression in spatial communication with the central cavity, the socket nesting within the cup-shaped depression and the first component fixed to the socket, and wherein the pin is fixed to the flexible liner.

7. The prosthetic adapter of claim 5 wherein the second component comprises the cylindrical hub and the body portion, and wherein the second component is a shuttle lock comprising:

an axial passageway extending along the second central axis through the cylindrical hub and the body portion, the pin extending into the axial passageway, and a clutch mechanism extending through a transverse passageway, the clutch mechanism actuatable between a first position in which the pin is engaged by the clutch mechanism and a second position in which the pin is not engaged by the clutch mechanism.

8. The prosthetic adapter of claim 7 wherein when the clutch mechanism is in the first position, the pin can be translated only in a single direction along the second central axis.

9. The prosthetic adapter of claim 8 wherein the clutch mechanism comprises a rod extending transversely through the main body portion of the second component, a one-way bearing, a gear located at a distal end of the rod, and a helical spring that biases the gear into the first position.

10. The prosthetic adapter of claim 9 further comprising a cleaning passageway extending from the outer surface of the second component to the transverse passageway.

12. The prosthetic adapter of claim 1 wherein when the anti-rotation member is in the first state, the cylindrical hub can not be pivoted to move the first and second central axes out of coaxial alignment without translating the cylindrical hub at least partially out of the central cavity of the collar.

13. The prosthetic adapter of claim 1 wherein the collar comprises a bottom surface and the body portion comprises a top surface, the cylindrical hub extending from the top surface of the body portion, and wherein the bottom surface of the collar and the top surface of the body portion are in contact with one another so as to form an interface extending transversely to the first and second axes.

2. The prosthetic adapter of claim I further comprising:

the cylindrical hub comprising;

an annular groove circumferentially surrounding the second central axis; and

an annular flange circumferentially surrounding the second central axis, the annular groove located between the annular flange and the body portion;

the anti-rotation member comprising at least one cylindrical element that extends through a hole extending from the outer surface of the collar to the inner surface of the collar; and

wherein, in the first state, the cylindrical element does not protrude from the inner surface of the collar, and, in the second state, a tip portion of the cylindrical element extends into the annular groove but does not contact a floor of the annular groove, and, in the third state, the tip portion of the set screw engages the floor of the annular groove.

3. The prosthetic adapter of claim 2 further comprising:

at least a portion of the floor of the annular groove being inclined relative to the second central axis;

the inclined portion having a circular transverse cross-sectional profile that tapers in size moving toward the body portion; and

wherein, in the third state, the tip portion of the of the cylindrical element engages the inclined portion of the floor of the annular groove, thereby urging the first and second components together.

4. The prosthetic adapter of claim 3 wherein the cylindrical element is a set screw and the hole is threaded, the set screw in threaded cooperation within the threaded hole.

11. The prosthetic adapter of claim I wherein the first component comprises an upper portion and a lower portion, the upper portion of the first component comprising a first pyramid block receiving cavity, the lower portion of the first component comprising the collar, and wherein the second component comprises an upper portion and lower portion, the upper portion of the second component comprising the cylindrical huh, the lower portion of the second component comprising the body portion having a second pyramid block receiving cavity.

14. The prosthetic adapter of claim I further comprising:

the cylindrical hub comprising;

an annular flange circumferentially surrounding the second central axis, the annular flange having a circular transverse cross-sectional profile having a first diameter;

the inner surface of the collar having a circular transverse cross-sectional profile having a second diameter; and

wherein the first and second diameters are substantially equal.

15. A prosthetic adapter comprising:

a first component adapted to be coupled to a residual limb;

a second component adapted to be coupled to a prosthesis;

the first component or the second component comprising a collar having an outer surface and an inner surface, the inner surface forming a central cavity about a first central axis;

the other one of the first component or the second component comprising a body portion and a hub extending from the body portion along a second central axis, the hub having a flange extending transversely from the hub, the flange spaced from the body portion so that a groove is formed between the body portion and the flange;

the flange having a circular transverse cross-sectional profile having a first diameter, the inner surface of the collar having a circular transverse cross-sectional profile having a second diameter, wherein the first and second diameters are substantially equal, the hub positioned in the central cavity so that the first and second central axes are substantially coaxial; and

an element extending through the collar and adjustable between;

(1) a retracted state in which the element does not protrude from the inner surface of the collar; and

(2) an anti-rotation state in which a tip portion of the element extends into the annular groove and engages a floor of the annular groove.

16. The prosthetic adapter of claim 15 further comprising:

at least a portion of the floor of the groove being inclined relative to the second central axis;

the inclined portion having a transverse cross-sectional profile that tapers in size moving toward the body portion; and

wherein, in the anti-rotation state, the tip portion of the of the element engages the inclined portion of the floor of the annular groove, thereby urging the first and second components together.

17. The prosthetic adapter of claim 15 wherein the element is further adjustable between (1) the retracted state, (2) the anti-rotation state, and (3) an axial locking state in which the tip portion of the element extends into the annular groove but does not contact the floor of the annular groove, thereby prohibiting the collar from being translated out of the central cavity of the collar while allowing the hub to rotate within the central cavity of the collar about the first central axis;

and wherein the element is a set screw in threaded cooperation with a threaded hole of the collar.

18. The prosthetic adapter of claim 15 further comprising a sleeve assembly having a cavity in which the residual limb nests, the sleeve assembly comprising a pin extending therefrom, the first component comprising the collar and fixed to the sleeve assembly so that the pin extends through the central cavity of the collar along the first central axis;

and wherein the first component comprises a cup-shaped flange extending from a top edge of the collar forming a cup-shaped cavity in spatial communication with the central cavity, and wherein the second component comprises the hub, and wherein the second component is a shuttle lock.

19. The prosthetic adapter of claim 15 wherein the first component comprises an upper portion and a lower portion, the upper portion of the first component comprising a first pyramid block receiving cavity, the lower portion of the first component comprising the collar;

wherein the second component comprises an upper portion and lower portion, the upper portion of the second component comprising the hub, the lower portion of the second component comprising the body portion having a second pyramid block receiving cavity;

wherein the upper portion of the first component comprises a plurality of set screws for operably engaging a pyramid block disposed within the first pyramid block receiving cavity; and

wherein the lower portion of the second component comprises a plurality of set screws for operably engaging a pyramid block disposed within the second pyramid block receiving cavity.

20. A prosthetic adapter comprising:

a first component adapted to be coupled to a residual limb;

a second component adapted to be coupled to a prosthesis, the first and second components adapted to be repetitively coupled and separated from one another;

the first component or the second component comprising a collar having an outer surface and an inner surface, the inner surface forming a central cavity formed about a first central axis;

the other one of the first component or the second component comprising a body portion and a hub extending from the body portion along a second central axis, the hub positioned in the central cavity so that the first and second central axes are substantially coaxial;

wherein when the hub is positioned within the central cavity of the collar, the hub has only two degrees of freedom, a first of the two degrees of freedom being rotation about the first central axis, and a second degree of the two degrees freedom being translation along the first central axis.

21. The prosthetic adapter of claim 20 further comprising an anti-rotation member adjustable between:

(1) a first state in which the anti-rotation member does not obstruct the hub from being translated out of the central cavity along the first central axis;

(2) a second state in which the anti-rotation member prohibits the hub from being translated out of the central cavity of the collar along the first central axis while allowing the hub to rotate within the central cavity of the collar about the first central axis; and

(3) a third state in which the anti-rotation member prohibits the hub from being translated out of the central cavity of the collar along the first central axis and prohibits rotation of the hub within the central cavity of the collar about the first central axis.