Prosthetic hip joint with side pivot

• US 20050049719A1
• Filed: 08/26/2003
• Published: 03/03/2005
• Est. Priority Date: 08/26/2003
• Status: Active Grant

• Current Assignee: Michael T. Wilson
• Original Assignee: Michael T. Wilson
• Inventors: Wilson, Michael T.
• Granted Patent: US 7,153,329 B2
• Time in Patent Office: Days
• US Class Current: 623/27
• CPC Class Codes: A61F 2/605 Hip joints
• CPC Class Codes: A61F 2/642 Polycentric joints, without longitudinal rotation
• CPC Class Codes: A61F 2/80 Sockets, e.g. of suction type
• CPC Class Codes: A61F 2002/30405 made by screwing complementary threads machined on the parts themselves
• CPC Class Codes: A61F 2002/30433 using additional screws, bolts, dowels, rivets or washers e.g. connecting screws
• CPC Class Codes: A61F 2002/5018 for adjusting angular orientation
• CPC Class Codes: A61F 2002/5039 allowing only for single rotation
• CPC Class Codes: A61F 2002/5043 with rotation-limiting stops, e.g. projections or recesses
• CPC Class Codes: A61F 2002/5055 Reinforcing prostheses by embedding particles or fibres during moulding or dipping, e.g. carbon fibre composites
• CPC Class Codes: A61F 2002/5067 having rolling elements between articulating surfaces for implantable joints A61F2002/30639
• CPC Class Codes: A61F 2002/507 Roller bearings
• CPC Class Codes: A61F 2002/607 Lower legs
• CPC Class Codes: A61F 2002/608 Upper legs
• CPC Class Codes: A61F 2002/7862 Harnesses, straps for connecting prosthetic parts A61F2002/30462
• CPC Class Codes: A61F 2220/0025 Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
• CPC Class Codes: A61F 2220/0041 using additional screws, bolts, dowels or rivets, e.g. connecting screws

Abstract

A prosthetic hip for supporting on a patient a prosthetic leg comprises a socket, a mount on the outer surface of the socket and defining a joint axis, the joint axis substantially coinciding with the natural axis of rotation of the patient'"'"'s natural leg when rotated in a sagittal plane, and a first member adjustably affixed to the socket'"'"'s outer surface. The first member includes an extension stop member and the upper end of the leg is pivotably mounted on the mount such that and pivoting of the leg in at least one direction is limited by the stop member. The prosthetic hip may also include a roller on a load arm extending medially from the upper leg end so as to engage the outer surface of the socket transmit a load from the socket directly to the prosthetic leg.

Claims

1. A prosthetic hip for supporting on a patient a prosthetic leg having an upper end, comprising:

a socket having an outer surface;

a mount on said outer surface and defining a joint axis, said joint axis substantially coinciding with the natural axis of rotation of the patient'"'"'s natural leg when rotated in a sagittal plane; and

a first member adjustably affixed to said outer surface, said first member including an extension stop member;

the upper leg end being pivotably mounted on said mount such that the leg is pivotable about said joint axis and pivoting of the leg in at least one direction is limited by said extension stop member.

2. The prosthetic hip according to claim 1, further including a load arm extending medially from the upper leg end so as to engage the outer surface of the socket.

3. The prosthetic hip according to claim 2 wherein said load arm is configured so as to transmit a load from the socket directly to the prosthetic leg.

4. The prosthetic hip according to claim 3 wherein said load arm includes a roller at its distal end and said roller engages the outer surface of said socket.

5. The prosthetic hip according to claim 4 wherein the outer surface of said socket includes a roller track configured to engage said roller.

6. The prosthetic hip according to claim 1 wherein said stop member includes means for engaging said socket so as to prevent relative rotation between said socket and said stop member.

7. The prosthetic hip according to claim 1 wherein said first member is mounted on said mount between said socket and said upper leg end.

8. The prosthetic hip according to claim 1 wherein said first member is azimuthally positionable relative to said joint axis, further including means for preventing rotation of said first member relative to said socket.

9. The prosthetic hip according to claim 8 wherein said rotation preventing means comprises at least a first engaging means on said first member and at least a second engaging means, said second engaging means being fixed relative to said joint axis, said first and second engaging means being engageable to prevent rotation of said first member relative to said socket.

10. The prosthetic hip according to claim 9 wherein said second engaging means comprises at least one protrusion on said socket.

11. A prosthetic hip for supporting on a patient a prosthetic leg having an upper end, comprising:

a socket having an outer surface;

a mount on said outer surface and defining a joint axis, said joint axis substantially coinciding with the natural axis of rotation of the patient'"'"'s natural leg when rotated in a sagittal plane;

the upper leg end being pivotably mounted on said mount such that the leg is pivotable about said joint axis; and

means for limiting pivoting of the leg about said joint axis in at least one direction.

12. The prosthetic hip according to claim 11, further including a load arm extending medially from the upper leg end so as to engage the outer surface of the socket.

13. The prosthetic hip according to claim 12 wherein said load arm is configured so as to transmit a load from the socket directly to the prosthetic leg.

14. The prosthetic hip according to claim 13 wherein said load arm includes a roller at its distal end and said roller engages the outer surface of said socket.

15. The prosthetic hip according to claim 14 wherein the outer surface of said socket includes a roller track configured to engage said roller.

16. The prosthetic hip according to claim 11 wherein said stop member includes means for engaging said socket so as to prevent relative rotation between said socket and said stop member.

17. The prosthetic hip according to claim 11 wherein said first member is mounted on said mount between said socket and said upper leg end.

18. The prosthetic hip according to claim 11 wherein said first member is azimuthally positionable relative to said joint axis, further including means for preventing rotation of said first member relative to said socket.

19. The prosthetic hip according to claim 18 wherein said rotation preventing means comprises at least a first engaging means on said first member and at least a second engaging means, said second engaging means being fixed relative to said joint axis, said first and second engaging means being engageable to prevent rotation of said first member relative to said socket.

20. The prosthetic hip according to claim 19 wherein said second engaging means comprises at least one protrusion on said socket.