Clamping assembly for external fixation system

Patent metadata

Field	Value
Publication number	US-9393045-B2
Application number	US-201414212183-A
Country	US
Kind code	B2
Filing date	Mar 14, 2014
Priority date	Mar 15, 2013
Publication date	Jul 19, 2016
Grant date	Jul 19, 2016

Abstract

A clamping assembly for an external fixation system, comprising a clamp body having an opening for receiving a bone fixation member; a pivotably rotatable locking arm associated with the clamp body, the locking arm being configured to provisionally hold the bone fixation member inside the opening of the clamp body; and a cam arm coupled to the locking arm, the cam arm being pivotably rotatable towards the clamp body to definitively hold the bone fixation member inside the opening of the clamp body.

First claim

The invention claimed is:

1. A clamping assembly for an external fixation system, comprising:
a C-shaped clamp body defining an opening for receiving a bone fixation member and including opposite first and second ends;
a pivotably rotatable locking arm including first and second ends, wherein the first end of the locking arm is rotatably coupled with the clamp body at or near the first end of the clamp body, the locking arm being configured such that the second end of the locking arm is capable of fitting into a recess in the second end of the clamp body in order to provisionally hold the bone fixation member inside the opening of the clamp body; and
a cam arm including first and second ends, wherein the first end of the cam arm is rotatably coupled to the locking arm at the second end of the locking arm, the cam arm being pivotably rotatable towards the clamp body to definitively hold the bone fixation member inside the opening of the clamp body.

2. The clamping assembly of claim 1 , wherein the locking arm is rotatable about a pivot pin.

3. The clamping assembly of claim 1 , wherein the cam arm is rotatable about a pivot pin.

4. The clamping assembly of claim 1 , wherein the opening is defined between a pair of jaws that are configured to snappingly engage the bone fixation member as the bone fixation member is introduced into the opening.

5. The clamping assembly of claim 1 , wherein a portion of the clamp body includes a serrated surface that is configured to prevent the clamp body from independently rotating with respect to a second component.

6. The clamping assembly of claim 1 , wherein the bone fixation member comprises a bone pin, a bone screw, a bone transfixing pin, a frame member, a rod or a bar.

7. The clamping assembly of claim 1 , wherein the first end of the cam arm is capable of fitting into the recess in the second end of the clamp body.

8. The clamping assembly of claim 1 , wherein the cam arm is pivotably rotatable towards the clamp body until the cam arm approximates a surface of the clamp body near the second end of the clamp body.

9. A clamping assembly for an external fixation system, comprising:
a C-shaped clamp body having and outer surface and an inner surface, the clamp body defining an opening for receiving a bone fixation member and including opposite first and second ends;
a pivotably rotatable locking arm including first and second ends, wherein the first end of the locking arm is rotatably coupled with the clamp body at or near the first end of the clamp body, the locking arm being configured such that the second end of the locking arm is capable of fitting into the second end of the clamp body in order to provisionally hold the bone fixation member inside the opening of the clamp body; and
a cam arm including first and second ends, wherein the first end of the cam arm is rotatably coupled to the locking arm at the second end of the locking arm, the first end of the cam arm is capable of fitting into the second end of the clamp body, the cam arm being pivotably rotatable towards the clamp body to definitively hold the bone fixation member inside the opening of the clamp body.

10. The clamping assembly of claim 9 , wherein the locking arm is rotatable about a pivot pin.

11. The clamping assembly of claim 9 , wherein the cam arm is rotatable about a pivot pin.

12. The clamping assembly of claim 9 , wherein the opening is defined between a pair of jaws that are configured to snappingly engage the bone fixation member as the bone fixation member is introduced into the opening.

13. The clamping assembly of claim 9 , wherein a portion of the clamp body includes a serrated surface that is configured to prevent the clamp body from independently rotating with respect to a second component.

14. The clamping assembly of claim 9 , wherein the bone fixation member comprises a bone pin, a bone screw, a bone transfixing pin, a frame member, a rod or a bar.

15. The clamping assembly of claim 9 , wherein the cam arm is pivotably rotatable towards the clamp body until the cam arm approximates the outer surface of the clamp body near the second end of the clamp body.

16. A clamping assembly for an external fixation system, comprising:
a C-shaped clamp body defining an opening for receiving a bone fixation member and including opposite first and second ends;
a pivotably rotatable locking arm including first and second ends, wherein the first end of the locking arm is rotatably coupled with the clamp body at or near the first end of the clamp body, the locking arm being configured to provisionally hold the bone fixation member inside the opening of the clamp body; and
a cam arm including first and second ends, wherein the first end of the cam arm is rotatably coupled to the locking arm at the second end of the locking arm, the cam arm being pivotably rotatable towards the clamp body to definitively hold the bone fixation member inside the opening of the clamp body,
wherein the clamp body further comprises a cam pocket at or near the second end of the clamp body for receiving and engaging a portion of the first end of the cam arm.

17. The clamping assembly of claim 16 , wherein the locking arm is rotatable about a pivot pin.

18. The clamping assembly of claim 16 , wherein the cam arm is rotatable about a pivot pin.

19. The clamping assembly of claim 16 , wherein the opening is defined between a pair of jaws that are configured to snappingly engage the bone fixation member as the bone fixation member is introduced into the opening.

20. The clamping assembly of claim 16 , wherein a portion of the clamp body includes a serrated surface that is configured to prevent the clamp body from independently rotating with respect to a second component.

Assignees

• Biomet Mfg Llc
• Biomet Mfg Llc

Inventors

• Cresina Jeffery T
• Slagle Paul

Classifications

• A61B2017/0042

  with special provisions for gripping · CPC title

• A61B17/6458

  with pin-clamps fixed at ends of connecting element · CPC title

• A61B17/645 Primary

  comprising a framework (A61B17/6425, A61B17/6441 take precedence) · CPC title

• A61B17/6416

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

• A61B17/62 Primary

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