Circular fixator system and method

Patent metadata

Field	Value
Publication number	US-10624674-B2
Application number	US-201615773665-A
Country	US
Kind code	B2
Filing date	Oct 6, 2016
Priority date	Nov 12, 2015
Publication date	Apr 21, 2020
Grant date	Apr 21, 2020

Abstract

A device includes a plurality of rings. Each ring has a first face, a second face, and at least one slot defined by first and second interior edges of the ring on opposing sides of the slot. The at least one slot penetrates from the first face to the second face. The first face of each ring has a first recess adjacent the slot on the first edge and a second recess adjacent the slot on the second edge. A plurality of posts join each one of the plurality of rings to an adjacent one of the plurality of rings.

First claim

What is claimed is:

1. A rocker plate assembly, comprising:
a body having a closed end and an open end, wherein the body includes a first side member having a first end, a second side member having a second end, and a connecting portion attached to the first side member opposite the first end and attached to the second side member opposite the second end, wherein the first and second side members each have at least one slot extending from a top surface of the body into the body, and wherein the first end of the first side member and the second end of the second side member define the open end of the body;
a sole having a bottom edge, a first sidewall, and a second sidewall, wherein the sole is coupled to a bottom surface of the body, and wherein the first and second sidewalls extend at least partially over sidewalls of the body;
a securing member attached to the first and second ends of the body, the securing member covering openings of the slots, so as to prevent the sliders from sliding out of the slots; and
a plurality of sliders slidably retained in the slots of the first and second side members.

2. The rocker plate assembly of claim 1 , wherein the at least one slot comprises a T-slot.

3. The rocker plate assembly of claim 2 , wherein at least one of the plurality of sliders comprises: a slider plate received by a bottom of the T-slot, a first shaft attached to the slider plate and slidable and rotatable within a top portion of the T-slot, and a support portion attached to the first shaft.

4. The rocker plate assembly of claim 3 , wherein the at least one of the plurality of sliders further comprises: a second shaft attached to the support portion, the second shaft offset from the first shaft.

5. The rocker plate assembly of claim 1 , wherein the plurality of sliders are configured to couple the rocker plate to a circular fixator.

6. The rocker plate assembly of claim 1 , wherein the sole comprises plastic or rubber.

7. The rocker plate assembly of claim 1 , wherein the top surface of the body includes a plurality of scallop-shaped recesses adjacent each side of each of the slots.

8. A rocker plate assembly, comprising:
a unitary U-shaped body including:
a first side member having a first end,
a second side member having a second end, and
a curved connecting portion integrally attached to the first side member opposite the first end and attached to the second side member opposite the second end,
wherein the first and second side members each have at least one T-shaped slot extending from a top surface of the body into the body; and

a sole having a bottom edge, a first sidewall, and a second sidewall, wherein the sole is coupled to a bottom surface of the body, and wherein the first and second sidewalls extend at least partially over sidewalls of the body;
a securing member attached to the first and second ends of the body, the securing member covering openings of the slots, so as to prevent the sliders from sliding out of the slots;
a plurality of sliders, each having:
a slider plate slidably retained in a respective bottom of a respective one of the T-shaped slots of the first and second side members,
a first shaft slidably retained in a respective top of the respective one of the T-shaped slots of the first and second side members,
a support portion attached to the first shaft, and
a second shaft attached to the support portion, the second shaft offset from the first shaft.

9. The rocker plate assembly of claim 8 , wherein the sole comprises plastic or rubber.

10. The rocker plate assembly of claim 8 , wherein the top surface of the body includes a plurality of scallop-shaped recesses adjacent each side of each of the slots.

11. The rocker plate assembly of claim 8 , wherein the first shaft is threaded, the assembly further comprising a first nut threadably received on the first shaft for gripping a respective one of the side members between the first nut and the slider plate.

12. The rocker plate assembly of claim 11 , wherein the second shaft is threaded, the assembly further comprising a second nut threadably received on the second shaft for gripping a ring of a circular fixator between the second nut and the support portion.

13. A fixation system, comprising:
a plurality of rings, each ring having a first face, a second face, and at least one slot penetrating from the first face to the second face;
a plurality of members joining each one of the plurality of rings to an adjacent one of the plurality of rings;
a rocker plate including a first side member having a first end, a second side member having a second end, and a connecting portion attached to the first side member opposite the first end and attached to the second side member opposite the second end, wherein the first and second side members each have at least one slot extending from a top surface of the body into the body, a sole having a bottom edge, a first sidewall, and a second sidewall, wherein the sole is coupled to a bottom surface of the body, and wherein the first and second sidewalls extend at least partially over sidewalls of the body, and a securing member attached to the first and second ends of the rocker plate body, the securing member covering openings of the slots of the first and second side members, so as to prevent the plurality of sliders from sliding out of the slots of the first and second side members; and
a plurality of sliders slidably retained in the slots of the first and second side members, each slider having a first shaft received by a respective one of the slots of the first or second side members and a second shaft received by one of the at least one slot of a bottom one of the plurality of rings, wherein the second shaft is offset from the first shaft.

14. The fixation system of claim 13 , wherein each of the plurality of sliders further comprises a support portion, the first shaft attached adjacent a first end of the support portion, and the second shaft attached adjacent a second end of the support portion.

15. The fixation system of claim 14 , wherein:
the slots of the first and second side members are T-shaped,
each of the plurality of sliders further comprises a disc and a nut,
each disc is received in a bottom of a slot of a respective one of the first or second side member, and
the first and second side members are gripped between the disc and nut of each respective slider.

Assignees

• Wright Medical Tech Inc

Inventors

• Robinson Chris
• Wong Kian-Ming

Classifications

• A61B17/6425

  specially adapted to be fitted across a bone joint · CPC title

• A61B17/8897

  Guide wires or guide pins · CPC title

• A61F5/0195

  Shoe-like orthopaedic devices for protecting the feet against injuries after operations · CPC title

• A61B2017/00407

  Ratchet means · CPC title

• A61B17/645 Primary

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