External fixator ring

• US 9,808,289 B2
• Filed: 03/28/2016
• Issued: 11/07/2017
• Est. Priority Date: 02/05/2008
• Status: Active Grant

• Current Assignee: Texas Scottish Rite Hospital for Children
• Original Assignee: Texas Scottish Rite Hospital for Children
• Inventors: Ross, John D., Samchukov, Mikhail L., Cherkashin, Alexander M., Birch, John G.
• Primary Examiner(s): PLIONIS, NICHOLAS J
• Application Number:
  US15/082,704
• Publication Number:
  US 20160206349A1
• Time in Patent Office: 589 Days
• Field of Search: 606 53- 59
• CPC Class Codes: A61B 17/62 Ring frames, i.e. devices extending around the bones to be positioned A61B17/6433 , A61B17/66 take precedence
• CPC Class Codes: A61B 2017/564 Methods for bone or joint treatment
• CPC Class Codes: Y10T 29/49963 Threaded fastener

Abstract

The present disclosure includes an external fixator ring that includes a central opening, inner and outer ring surfaces and upper and lower ring surfaces. In some embodiments, one or more apertures are defined in the inner or outer surface for receiving securing devices. The apertures in the inner or outer surface are adapted to provide rigid attachment for connection struts while allowing for a range of motion between the interconnected rings. In some other embodiments, the external fixator ring further comprises angled flanges extending radially from the inner or outer surface. The angle flanges each include a mounting surface, apertures are defined in the mounting surface of the angle flanges for receiving securing devices.

Claims

1. An external fixator ring comprising:

a ring with a central opening defined therethrough, the ring having inner and outer ring surfaces and upper and lower ring surfaces, and an outer longitudinal edge in the outer ring surface perpendicular to the upper and lower ring surfaces;

one or more apertures extending through the upper ring surface to the lower ring surface;

one or more angled flanges extending radially from said inner or outer ring surface, each angled flange comprising a first mounting surface, a second mounting surface, and a securing surface positioned between the first and second mounting surfaces;

each of said angled flanges comprising two strut connection apertures extending at least partially into the first and second mounting surfaces and having a smooth inner surface operable to receive studs providing attachment to a ring connection strut; and

,

each of said angled flanges comprising a receiving aperture extending at least partially into the securing surface so as to intersect with the two strut connection apertures, said receiving aperture operable to receive a locking screw to lock the studs into the adjacent strut connection apertures.

2. The external fixator ring of claim 1, wherein the receiving strut connection apertures and the receiving aperture meet at a recess defined in the inner or outer ring surface.

3. The external fixator ring of claim 2, wherein the locking screw comprises an angled tip and the studs comprise a smooth surface at the end portion of the studs, wherein the angled tip of the locking screw can be driven into contact with the smooth surface at the end portion of the studs within the recess to lock the studs in place.

4. The external fixator ring of claim 2, wherein each of the studs comprises a groove at the end portion of the studs, wherein the tip of the locking screw can be driven into contact with the groove at the end portion of the studs within the recess to lock the studs in place.

5. The external fixator ring of claim 4, wherein two strut connection apertures meet with one receiving aperture within the recess so that one locking screw can lock two studs in place.

6. The external fixator ring of claim 2, further comprising:

each of the strut connection apertures comprising a conical recess at the end of the apertures,

each of the studs comprising a conical tip and a conical groove at the end portion of the studs,

each of the locking screws comprising a beveled edge at the end of the locking screws,

wherein the conical tip of the studs is operable to be driven into contact with the conical recess at the end of the strut connection aperture,

and wherein the beveled edge at the end of the locking screw can be driven into contact with the conical groove at the end portion of the studs within the recess to lock the studs in place.

7. The external fixator ring of claim 6, wherein two strut connection apertures meet with one receiving aperture within the recess so that one locking screw can lock two studs in place.

8. The external fixator ring of claim 2, further comprising:

each of the studs comprising a groove at an end portion of the stud,

each of the locking screws comprising a pivotally attached engagement portion at the tip of the locking screw,

wherein the engagement portion of the locking screw can be driven into contact with the groove at the end portion of the studs within the recess to lock the studs in place.

9. The external fixator ring of claim 8, wherein two strut connection apertures meet with one receiving aperture within the recess so that the engagement portion of the locking screw is operable to swivel until it securely fits within the grooves of the studs so as to lock the studs in place.

10. The external fixator ring of claim 9, wherein the tip of the locking screw comprises a ball and the engagement portion comprises a recess operable to be pivotally mounted to the ball.

11. The external fixator ring of claim 10, wherein two strut connection apertures meet with one receiving aperture within the recess so that one locking screw locks two studs in place.

12. The external fixator ring of claim 1, wherein the one or more angled flanges comprise trapezoidal flanges.

13. The external fixator ring of claim 1, wherein:

the locking screw further comprises an angled tip; and

the strut connection aperture and the receiving aperture are aligned at an angle that substantially corresponds to the shape of the angled tip of the locking screw.

14. The external fixator ring of claim 13, wherein the locking screw comprises a set screw configured for engaging the end portion of one or more studs.

15. An external fixator ring comprising:

a ring with a central opening defined therethrough, the ring having inner and outer ring surfaces and upper and lower ring surfaces;

one or more apertures extending through the upper ring surface to the lower ring surface;

one or more angled flanges extending radially from said outer ring surface, each angled flange comprising a first mounting surface, a second mounting surface, and a securing surface forming a trapezoidal shape;

each angled flange comprising two strut connection apertures extending at least partially into the first and second mounting surfaces, each of the strut connection apertures having a smooth inner surface operable to receive a stud providing attachment to a ring connection strut;

each angled flange further comprising a receiving aperture extending at least partially into the securing surface so as to intersect with the two strut connection apertures, said receiving aperture operable to receive a locking screw to lock the studs into the adjacent strut connection apertures; and

wherein the strut connection apertures and the receiving aperture meet at a recess within the ring.

16. The external fixator ring of claim 15, wherein the locking screws comprise an angled tip and the studs comprise a smooth surface at the end portion of the studs, wherein the angled tip of the locking screw can be driven into contact with the smooth surface at the end portion of the studs within the recess to lock the studs in place.

17. The external fixator ring of claim 16, wherein two strut connection apertures meet with one receiving aperture within the recess so that one locking screw can lock two studs in place.

18. The external fixator ring of claim 17, wherein each of the studs comprise a groove at the end portion of the stud, wherein the tip of the locking screw can be driven into contact with the groove at the end portion of the stud within the recess to lock the studs in place.

19. The external fixator ring of claim 16, wherein two strut connection apertures meet with one receiving aperture within the recess so that one locking screw can lock two studs in place.

20. The external fixator ring of claim 15, further comprising:

each of the strut connection apertures comprising a conical recess at the end of the apertures;

each of the studs comprising a conical tip and a conical groove at an end portion of the stud;

each of the locking screws comprising a beveled edge at the end of the locking screws;

wherein the conical tip of the studs is operable to be driven into contact with the conical recess at the end of the strut connection aperture; and

wherein the beveled edge of the locking screw can be driven into contact with the conical groove at the end portion of the studs within the recess to lock the studs in place.

21. The external fixator ring of claim 20, wherein two strut connection apertures meet with one receiving aperture within the recess so that one locking screw can lock two studs in place.

22. The external fixator ring of claim 21, wherein each strut connection aperture meets with a corresponding receiving aperture within the recess so that one locking screw locks one only stud in place.

23. The external fixator ring of claim 15, further comprising:

each of the studs comprising a groove at the end portion of each of the studs,

each locking screw comprising a pivotally attached engagement portion at the tip of the locking screw,

wherein the engagement portion of locking screw can be driven into contact with the groove at the end portion of the studs within the recess to lock the one or more studs in place.

24. The external fixator ring of claim 23, wherein two strut connection apertures meet with one receiving aperture within the recess so that the engagement portion of the locking screw is operable to swivel until it securely fits within the grooves of the studs so as to lock the two studs in place.

25. The external fixator ring of claim 23, wherein the tip of the locking screw comprises a ball and the engagement portion comprises a recess operable to be pivotally mounted to the ball.

26. The external fixator ring of claim 23, wherein two strut connection apertures meet with one receiving aperture within the recess so that one locking screw can lock two studs in place.