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다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
NTIS 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
DataON 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Edison 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0459492 (2009-07-01) |
등록번호 | US-8366745 (2013-02-05) |
발명자 / 주소 |
|
출원인 / 주소 |
|
인용정보 | 피인용 횟수 : 6 인용 특허 : 419 |
A dynamic longitudinal connecting member assembly includes an anchor member having an integral or otherwise fixed elongate core extending through at least two elastic spacers and at least one outer sleeve or trolley. The anchor member and the outer sleeve each attach to at least one bone anchor. The
A dynamic longitudinal connecting member assembly includes an anchor member having an integral or otherwise fixed elongate core extending through at least two elastic spacers and at least one outer sleeve or trolley. The anchor member and the outer sleeve each attach to at least one bone anchor. The spacers have differing durometers and/or geometries, resulting in greater axial movement of the sleeve in one direction than in an opposite direction. The spacers are compressed prior to attachment to the bone anchors.
1. In a medical implant assembly having first and second bone attachment structures cooperating with a longitudinal connecting member, the improvement wherein the longitudinal connecting member comprises: a) an anchor member portion passing through and secured directly to the first bone attachment s
1. In a medical implant assembly having first and second bone attachment structures cooperating with a longitudinal connecting member, the improvement wherein the longitudinal connecting member comprises: a) an anchor member portion passing through and secured directly to the first bone attachment structure, the anchor member portion having a first width and having an integral core extension of reduced second width, the core extension extending from the anchor member portion along a substantially central axis of the longitudinal connecting member, the first and second widths being measured perpendicular to the central axis;b) a first elastic outer spacer, the core extension being received in the spacer, the spacer being positioned between the two bone attachment structures;c) a second elastic outer spacer, the core extension being received in the second spacer, the second spacer being more compressible than the first spacer, both the first and second spacers being pre-compressed prior to attachment of the assembly to the bone attachment structures; the second elastic outer spacer being located relative to the core extension so as to not be between the first and second bone attachment structures; andd) a substantially inelastic sleeve, the core extension being received through the sleeve and in slidable relationship therewith, the sleeve passing through and secured in the second bone attachment structure, the sleeve being disposed between the first and second pre-compressed spacers, the pre-compressed spacers exerting axial forces on the sleeve. 2. The improvement of claim 1 wherein the second spacer is disposed near an end of the assembly. 3. The improvement of claim 2 further comprising a fixing structure engaged with the core extension at an end thereof opposite the anchor member portion and adjacent the second spacer. 4. The improvement of claim 3 wherein the fixing structure is a crimping ring fixed to the core extension. 5. The improvement of claim 1 wherein the core extension has a substantially circular cross-section measured perpendicular to the axis. 6. The improvement of claim 1 wherein the core extension has a non-circular cross-section measured perpendicular to the axis. 7. The improvement of claim 1 wherein the anchor member portion has a substantially circular cross-section measured perpendicular to the axis. 8. The improvement of claim 1 wherein the first spacer has opposed parallel load-bearing end surfaces disposed substantially perpendicular to the axis. 9. The improvement of claim 1 wherein the first spacer has opposed non-parallel load-bearing end surfaces. 10. The improvement of claim 9 wherein the first spacer has a curved load bearing surface. 11. The improvement of claim 9 wherein the first spacer has a planar load bearing end surface disposed substantially perpendicular to the central axis and a curved opposed load bearing end surface. 12. The improvement of claim 1 wherein the core extension is substantially linear. 13. The improvement of claim 1 wherein the core extension is integral to the anchor member portion. 14. The improvement of claim 1 further comprising at least one pressure washer located adjacent the sleeve, the pressure washer having a substantially convex surface sized and shaped to slidingly engage a substantially concave surface of the sleeve. 15. The improvement of claim 14 wherein the convex surface is at least partially spherical. 16. The improvement of claim 15 wherein the concave surface is at least partially spherical. 17. The improvement of claim 14 wherein the at least one pressure washer is a first pressure washer and further comprising a second pressure washer, the first pressure washer located adjacent one end of the sleeve and the second pressure washer located adjacent an opposite end of the sleeve. 18. The improvement of claim 1 wherein the first spacer is made from a material having a higher durometer than a material of the second spacer. 19. The improvement of claim 18 wherein the first spacer has at least one groove. 20. The improvement of claim 1 wherein the first spacer has a different geometry than the second spacer. 21. The improvement of claim 1 further comprising at least a third elastic and pre-compressed spacer. 22. The improvement of claim 1 wherein the at least one sleeve has an inner surface defining a through bore, the core extension being received in the through bore and in sliding relation with the sleeve inner surface, the sleeve inner surface being substantially cylindrical. 23. The improvement of claim 1 wherein the at least one sleeve has an inner surface defining a through bore, the core extension being received in the through bore and in sliding relation with the sleeve inner surface, the sleeve inner surface being non-linear in cross-section taken along the central axis, the surface flaring radially outwardly towards at least one of the first and second spacers. 24. The improvement of claim 23 wherein the sleeve inner surface is hyperboloid. 25. The improvement of claim 1 further comprising an elastic over-mold covering at least a portion of the at least one sleeve and adjacent first compressible outer spacer. 26. The improvement of claim 1 further comprising an elastic over-mold substantially covering at least one of the first and second spacers. 27. The improvement of claim 1 wherein the second spacer has non-overlapping engagement with the sleeve. 28. The improvement of claim 1 wherein the first spacer has a central compression member flanked by a pair of washers. 29. The improvement of claim 28 wherein the relative stiffness and displacements of the central compression member and washers is variable so as to be adjustable for specific pertinent requirements. 30. The improvement according to claim 1, wherein the sleeve includes a cup shaped end surface. 31. In a medical implant assembly having first and second bone anchors cooperating with a longitudinal connecting member, the improvement wherein the longitudinal connecting member comprises: a) an anchor member portion having a first width and also having an integral inner core extension having a second width that is smaller than the first width and extending from the anchor member portion along a central axis thereof; the anchor member portion passing through and being secured to the first bone anchor; the extension slidably passing through the second bone anchor;b) an elastic and pre-compressed outer spacer, the longitudinal connecting member being slidingly received through the spacer along the axis, the spacer being positioned between the bone anchors, the spacer having at least a first curved end surface;c) at least one inelastic sleeve, the core extension being slidingly received within the sleeve along the axis, the sleeve being in engagement with the second bone anchor, the sleeve having at least a second curved end surface; andd) at least one elastic and pre-compressed bumper disposed near an end of the core extension and not between the first and second bone anchors, the elastic bumper being more elastic than the spacer, allowing for the sleeve to move back and forth along the core a greater distance toward the bumper than toward the spacer. 32. The improvement of claim 31 further comprising at least one pressure washer having at least a third curved end surface sized and shaped to closely slidingly cooperate with one of the first curved end surface and the second curved end surface. 33. The improvement of claim 32 wherein the third curved end surface is substantially convex and the first and second curved end surfaces are substantially concave. 34. The improvement of claim 32 wherein the first, second and third curved surfaces are all at least partially spherical. 35. The improvement of claim 31 wherein the at least one outer spacer is a plurality of spacers of differing degrees of elasticity. 36. The improvement of claim 35 wherein the differing degrees of elasticity are due to differences in durometer between the spacers. 37. The improvement of claim 35 wherein the differing degrees of elasticity are due to difference in geometry between the spacers. 38. The connecting member according to claim 31, wherein the sleeve curved end surface is cup shaped. 39. In a medical implant assembly having first and second bone anchors cooperating with a longitudinal connecting member, the improvement wherein the longitudinal connecting member comprises: a) an anchor member portion having a first width, the anchor member having a core extension of a second smaller width extending therefrom along a central axis thereof, the first and second widths measured in a direction perpendicular to the axis; the anchor member portion passing through and being secured to the first bone anchor; the core extension slidably passing through the second bone anchor in use;b) an elastic outer spacer, the core extension being slidingly received through the spacer along the axis, the spacer being positioned between the at least two bone anchors; andc) an inelastic sleeve, the core extension being slidingly received within the sleeve along the axis, the sleeve being secured to the second bone anchor, the sleeve having an inner surface defining a through bore for receiving the core extension. 40. The improvement of claim 39 wherein the sleeve inner surface flares radially outwardly in a direction toward the at least one compressible outer spacer. 41. The improvement of claim 39 wherein the sleeve inner surface is hyperboloid in shape. 42. The improvement of claim 39 further comprising at least one inelastic pressure washer having a convex surface sized and shaped to closely slidingly cooperate with at least a portion of the sleeve inner surface. 43. The improvement of claim 42 further comprising an elastic over-mold covering at least a portion of the pressure washer and at least a portion of the sleeve. 44. The improvement of claim 39 wherein at least a portion of the sleeve inner surface is non-linear in cross-section taken along the axis. 45. The connecting member according to claim 39, wherein the sleeve includes a cup shaped end surface. 46. A medical implant comprising: a) first and second bone anchors;b) a longitudinal connecting member having a first non-sliding anchor portion of a first width that passes through and is secured to the first bone anchor;c) the connecting member has a second integral extension portion that extends axially from the first anchor portion; the extension portion having a second width that is less than the first width,d) a sleeve slidably receiving the extension portion that is mounted in the second bone anchor such that the extension portion passes through and is slidably received in the second bone anchor;e) an end blocker secured to the connecting member; andf) a bumper located between the blocker and the second bone anchor; the sleeve and the bumper being pre-compressed. 47. The connecting member according to claim 46, wherein the sleeve includes a cup shaped end surface. 48. In a medical implant assembly having first and second bone attachment structures cooperating with a longitudinal connecting member, the improvement wherein the longitudinal connecting member comprises: a) an anchor member portion passing through and secured directly to the first bone attachment structure, the anchor member portion having a first width and having a core extension of reduced second width, the core extension extending from the anchor member portion along a substantially central axis of the longitudinal connecting member, the first and second widths being measured perpendicular to the central axis;b) a first elastic outer spacer, the core extension being received in the spacer, the spacer being positioned between the two bone attachment structures;c) a second elastic outer spacer, the core extension being received in the second spacer, the second spacer being more compressible than the first spacer, both the first and second spacers being pre-compressed in a resting assembly state when connected to the bone attachment structures; the second elastic outer spacer being located relative to the core extension so as to not be between the first and second bone attachment structures; andd) a substantially inelastic sleeve, the core extension being received through the sleeve and in slidable relationship therewith, the sleeve passing through and secured in the second bone attachment structure, the sleeve being disposed between the first and second pre-compressed spacers, the pre-compressed spacers exerting axial forces on the sleeve. 49. The improvement according to claim 48, wherein the sleeve includes a cup shaped end surface.
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