Polyaxial strut for external fixation

Patent metadata

Field	Value
Publication number	US-11141197-B2
Application number	US-201916450527-A
Country	US
Kind code	B2
Filing date	Jun 24, 2019
Priority date	Jun 24, 2019
Publication date	Oct 12, 2021
Grant date	Oct 12, 2021

Abstract

A polyaxial external fixation strut including a strut member and a first ball joint coupled to an end portion of the strut member. The first ball joint includes a first ball joint body and a first ball member. The first ball member is rotatably coupled to the first ball joint body to allow for variable angle adjustable positioning of the first ball member within the first ball joint body. The first ball joint additionally includes a friction member. The friction member is configured to create friction between the first ball member and the first ball joint body.

First claim

What is claimed is:

1. A polyaxial external fixation strut comprising:
a strut member;
a first ball joint coupled to an end portion of the strut member, the first ball joint comprising a first ball joint body; and
a first ball member, the first ball member being rotatably coupled to the first ball joint body;

wherein the first ball joint comprises a friction member, wherein the friction member is configured to create friction between the first ball member and the first ball joint body to maintain an adjustable position of the first ball member relative to the first ball joint body;
wherein the first ball joint further comprises a first ring contact portion and a fixator clip removably attached to the first ball joint body and the first ring contact portion, wherein the fixator clip is configured to fix the first ball joint body and the first ring contact portion in a linear configuration.

2. The polyaxial external fixation strut of claim 1 , wherein the strut member further comprises a second ball joint coupled to an end portion of the strut member opposite the first ball joint.

3. The polyaxial external fixation strut of claim 1 , wherein the friction member comprises a spring member.

4. The polyaxial external fixation strut of claim 3 , wherein the spring member comprises a conical spring washer.

5. The polyaxial external fixation strut of claim 3 , wherein the spring member is positioned between an end of the strut member and the first ball member.

6. The polyaxial external fixation strut of claim 1 , wherein the friction member comprises a spring clip member.

7. The polyaxial external fixation strut of claim 6 , wherein the spring clip member is C-shaped.

8. The polyaxial external fixation strut of claim 6 , wherein the spring clip member is configured to at least partially surround the first ball member.

9. The polyaxial external fixation strut of claim 6 , wherein the spring clip member is configured to sit within a channel that runs along at least a partial circumference of an inner surface of the first ball joint body.

10. The polyaxial external fixation strut of claim 6 , wherein the spring clip member is configured to sit within a channel that runs along at least a partial circumference of the outer surface of the ball member.

11. The polyaxial external fixation strut of claim 1 , wherein the first ball first ring contact portion is attached to the first ball member.

12. A polyaxial external fixation strut comprising:
a strut member;
a first ball joint coupled to an end portion of the strut member, the first ball joint comprising a first ball joint body;
a first ball member, the first ball member being rotatably coupled to the first ball joint body; and

wherein the first ball joint comprises a channel that runs along at least a partial circumference of an inner surface of the first ball joint body or a channel that runs along at least a partial circumference of an outer surface of the first ball member, configured to accommodate a friction member; and
wherein the friction member is configured to create friction between the first ball member and the first ball joint body to maintain an adjustable position of the first ball member relative to the first ball joint body;
wherein the first ball joint further comprises a first ring contact portion attached to the first ball member;
wherein the first ball joint body and the first ring contact portion are configured to be reversibly fixed in a linear configuration.

13. The polyaxial external fixation strut of claim 12 , wherein the strut member further comprises a second ball joint coupled to an end portion of the strut member opposite the first ball joint.

14. The polyaxial external fixation strut of claim 12 , wherein the friction member comprises a spring clip member.

15. The polyaxial external fixation strut of claim 14 , wherein the spring clip member is C-shaped.

16. The polyaxial external fixation strut of claim 15 , wherein the spring clip member is configured to sit within the channel that runs along at least a partial circumference of an inner surface of the first ball joint body.

17. The polyaxial external fixation strut of claim 15 , wherein the spring clip member is configured to sit within the channel that runs along at least a partial circumference of the outer surface of the ball member.

18. The polyaxial external fixation strut of claim 12 , wherein the first ball joint further comprises a fixator clip removably attached to the first ball joint body and the first ring contact portion, wherein the fixator clip is configured to fix the first ball joint body and the first ring contact portion in a linear configuration.

19. A polyaxial external fixation strut comprising:
a strut member;
a first ball joint coupled to an end portion of the strut member, the first ball joint comprising a first ball joint body;
a first ball member, the first ball member being rotatably coupled to the first ball joint body;
a first ring contact portion attached to the first ball member; and
a fixator clip configured to fix the first ball joint body and the first ring contact portion in a linear configuration;

wherein the first ball joint comprises a channel that runs along at least a partial circumference of an inner surface of the first ball joint body configured to accommodate a spring clip member; and
wherein the spring clip member at least partially surrounds the first ball member to maintain an adjustable position of the first ball member relative to the first ball joint body.

20. The external fixation strut of claim 19 , wherein the strut housing comprises a second ball joint coupled to an end portion of the strut housing opposite the first ball joint.

21. The polyaxial external fixation strut of claim 19 , wherein the spring clip member is C-shaped.

22. The polyaxial external fixation strut of claim 19 , wherein the fixator clip is removably attached to the first ball joint body and first ring contact portion.

Assignees

• Depuy Synthes Products Inc

Inventors

• Lavoritano Scott
• Costanzo Joseph
• Peterson Joseph
• Wahl Michael

Classifications

• A61B17/60 Primary

  for external osteosynthesis, e.g. distractors, contractors · CPC title

• A61B17/62

  Ring frames, i.e. devices extending around the bones to be positioned ({A61B17/6433} , A61B17/66 take precedence) · CPC title

• A61B17/6408

  Devices not permitting mobility, e.g. fixed to bed, with or without means for traction or reduction (without surgery A61F5/04) · CPC title

• A61B2017/606

  with resilient spring element · CPC title

• A61B17/6416 Primary

  with non-continuous, e.g. hinged, pin-clamp connecting element (A61B17/6425, A61B17/6441 take precedence) · CPC title