External fixation

Patent metadata

Field	Value
Publication number	US-9408635-B2
Application number	US-201314030311-A
Country	US
Kind code	B2
Filing date	Sep 18, 2013
Priority date	Mar 15, 2013
Publication date	Aug 9, 2016
Grant date	Aug 9, 2016

Abstract

The present invention discloses an orthopedic external fixation device, an orthopedic external fixation system, and method of assembling the orthopedic external fixation device. The orthopedic external fixation device may include first and second jaws each including respective arms, a floating circular jaw disposed between the first and second jaws and defining first and second channels with the first and second jaws respectively, a plurality of pins and biasing members configured to distance the circular jaw from the first and second jaws, and a locking assembly. The first and second channels may each be configured to receive one of an embedding member or a bar of the external fixation system. The locking assembly may be at least partially received within apertures defined by the first, second, and circular jaws and may be configured to lock the first, second, and circular jaws.

First claim

What is claimed is:

1. An orthopedic fixation device, comprising:
first and second jaws each including respective arms;
a floating circular jaw disposed between the first and second jaws and defining first and second channels with the first and second jaws, respectively, the first and second channels each being configured to receive one of an embedding member or a bar of an external fixation system;
a plurality of pins and biasing members configured to distance the circular jaw from the first and second jaws; and
a locking assembly at least partially received within apertures defined by the first, second, and circular jaws and being configured to lock the first, second, and circular jaws;
a first one of the plurality of biasing members is disposed within a central passageway defined by a bolt of the locking assembly and is disposed between the first jaw and the circular jaw such that the first biasing member contacts a first pin; and
a second one of the plurality of biasing members is disposed within the central passageway between the second jaw and an end cap that secures the first and second biasing members within the central passageway, the second biasing member configured to bias the circular jaw away from the second jaw.

2. The device of claim 1 , wherein the circular jaw defines notches in its upper surface and its lower surface, respectively.

3. The device of claim 1 , wherein the upper surface and lower surface of the circular jaw include teeth or other textured surface for increasing the friction of the upper and lower surfaces.

4. The device of claim 1 , wherein the biasing members have equal spring coefficients such that they provide an equal and opposite force on the circular jaw.

5. The device of claim 1 wherein the first and second biasing members have equal spring coefficients such that they provide an equal and opposite force on the circular jaw.

6. The device of claim 5 , wherein the circular jaw defines notches in its upper surface and its lower surface, respectively.

7. The device of claim 5 , wherein the upper surface and lower surface of the circular jaw include teeth or other textured surface for increasing the friction of the upper and lower surfaces.

8. The device of claim 1 , wherein the locking assembly comprises:
a bolt that defines an elongated slot that extends between a top end and a bottom end of the bolt, the bottom end of the bolt defining an opening that extends to a head of the bolt and intersects the slot over a majority of a length of the opening, the bolt including threads disposed along a portion of the bolt's length on an exterior surface of the bolt; and
a locking nut configured to engage the threads of the bolt.

9. The device of claim 8 , wherein the biasing members have an equal spring coefficient such that they provide an equal and opposite force on the circular jaw.

10. An external fixation system comprising:
at least one bar and at least one embedding member attachable to the bar and sized and shaped for embedding in bone; and
at least one embedding member connector configured to be coupled to the bar, the at least one embedding member connector comprising:
first and second jaws each including respective arms;
a floating circular jaw disposed between the first and second jaws and defining first and second channels with the first and second jaws, respectively, the first and second channels each being configured to receive at least one of the at least one bar and the at least one embedding member of the external fixation system; a plurality of pins and biasing members configured to distance the circular jaw from the first and second jaws; and
a locking assembly at least partially received within apertures defined by the first, second, and circular jaws and being configured to lock the first, second, and circular jaws;
a first one of the plurality of biasing members is disposed within a central passageway defined by a bolt of the locking assembly and is disposed between the first jaw and the circular jaw such that the first biasing member contacts a first pin; and
a second one of the plurality of biasing member is disposed within the central passageway between the second jaw and an end cap that secures the first and second biasing members within the central passageway, the second biasing member configured to bias the circular jaw away from the second jaw.

11. The system of claim 10 , wherein the circular jaw defines notches in its upper surface and its lower surface, respectively.

12. The system of claim 10 , wherein the upper surface and lower surface of the circular jaw include teeth or other textured surface for increasing the friction of the upper and lower surfaces.

13. The system of claim 10 wherein the biasing members have equal spring coefficients such that they provide an equal and opposite force on the circular jaw.

14. The system of claim 10 wherein the first and second biasing members have equal spring coefficients such that they provide an equal and opposite force on the circular jaw.

15. The system of claim 10 , wherein the looking assembly comprises:
a bolt that defines an elongated slot that extends between a top end and a bottom end of the bolt, the bottom end of the bolt defining an opening that extends to the head of the bolt and intersects the slot over a majority of a length of the opening, the bolt including threads along a portion of the bolt's length on an exterior surface of the bolt; and
a locking nut configured to engage the threads of the bolt.

16. A method of assembling an orthopedic fixation device, the method comprising:
sliding a first jaw onto a bolt;
sliding a floating circular jaw onto said bolt;
sliding a second jaw onto the bolt;
inserting a plurality of pins and biasing members into an opening defined by the bolt to distance the circular jaw from the first and second jaws; and
affixing a locking nut onto a threaded portion of the bolt to secure the plurality of pins and biasing members within said opening,
wherein the circular jaw defines first and second channels with the first and second jaws, respectively, that are configured to receive at least one of an embedding member or a bar therein;
wherein the opening defined by the bolt extends to a head of the bolt and intersects an elongated slot that extends between a top end and a bottom end of the bolt.

17. A method of assembling an orthopedic fixation device,
the method comprising:
sliding a first jaw onto a bolt;
sliding a floating circular jaw onto said bolt;
sliding a second jaw onto the bolt;
inserting a plurality of pins and biasing members into an opening defined by the bolt to distance the circular jaw from the first and second jaws; and
affixing a locking nut onto a threaded portion of the bolt to secure the plurality of pins and biasing members within said opening,
wherein the circular jaw defines first and second channels with the first and second jaws, respectively, that are configured to receive at least one of an embedding member or a bar therein; wherein inserting the pins comprises inserting the pins into respective notches on the upper surface and lower surface of the circular jaw.

Assignees

• Wright Medical Tech Inc

Inventors

• Wong Kian-Ming (Kevin)

Classifications

• A61B17/645

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

• A61B17/6466 Primary

  with pin-clamps movable along a solid connecting rod · CPC title