Patent FR1156298A successfully refreshed from Google Patents.
US5474555A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spinal implant system
Assignee: EBI LLC
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Filing: 1994-08-03
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Granted: 1995-12-12
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Expires: 2014-08-03
Abstract
Abstract An apparatus is provided for the internal fixation of the spine. The apparatus comprises an assembly having at least two anchors and an elongated stabilizer. The anchors each have means to hold the anchor to the bone, and include receiving means which receive the stabilizer as well as securing means which cooperate with the receiving means by means of the interaction of mating threads to cause the application of compression on the stabilizer into the receiving means.
Inventors
- 👤 Rolando M. Puno
- 👤 Philip A. Mellinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:43
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/70; A61B17/7001; A61B17/7035; A61B17/7037; A61B17/7049; A61B17/7052; A61B17/7074; A61B17/7076; A61B17/7082; A61B17/7083; A61B17/7091; C; C12; C12N; C12N9/00; C12N9/10; C12N9/12; C12N9/1241; A61B17/7032; A61B17/7092; A61B17/84; A61B17/86
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
229 words
A fixation device for the stabilization of one or more spinal bone segments, comprising: at least two anchors and an elongated stabilizer, said stabilizer having a cross-sectional depth, said anchors each comprising screw means which secure said anchor to said spinal bone segment; anchor seat means which has a lower bone interface surface which is operatively joined to said spinal bone segment by said screw means and has external threads on a portion spaced apart from said bone interface surface and said anchor seat means having an internal bore through which said screw means projects and the screw means has a rounded head which cooperates with said internal bore to permit limited motion between said screw means and said anchor seat means, said anchor seat means further having a stabilizer receiving channel with a stabilizer interface surface to receive said stabilizer and said external threads extending toward said stabilizer interface surface beyond the cross-sectional depth of the stabilizer; and a nut having a relatively constant diameter through bore having internal threads which cooperate with the threads of said anchor seat which is exterior to said elongated stabilizer and said seat and said screw means cooperating to allow relative limited motion whereby alignment of the means to receive the stabilizer is facilitated and transfer of load from the stabilizer to the interface of the spine and the screw is inhibited.
Claim 2
Dependent Claim
229 words
A fixation device for the stabilization of one or more spinal bone segments, comprising: at least two anchors and an elongated stabilizer, said stabilizer having a cross-sectional depth, said anchors each comprising screw means which secure said anchor to said spinal bone segment; anchor seat means which has a lower bone interface surface which is operatively joined to said spinal bone segment by said screw means and has external threads on a portion spaced apart from said bone interface surface and said anchor seat means having an internal bore through which said screw means projects and the screw means has a rounded head which cooperates with said internal bore to permit limited motion between said screw means and said anchor seat means, said anchor seat means further having a stabilizer receiving channel with a stabilizer interface surface to receive said stabilizer and said external threads extending toward said stabilizer interface surface beyond the cross-sectional depth of the stabilizer; and a nut having a relatively constant diameter through bore having internal threads which cooperate with the threads of said anchor seat which is exterior to said elongated stabilizer and said seat and said screw means cooperating to allow relative limited motion whereby alignment of the means to receive the stabilizer is facilitated and transfer of load from the stabilizer to the interface of the spine and the screw is inhibited.
Claim 3
Dependent Claim
24 words
A fixation device as set forth in claim 1, wherein said anchor seat means includes an internal bore through which said screw means projects.
Claim 4
Dependent Claim
35 words
A fixation device as set forth in claim 2, wherein said screw means comprises a screw having a rounded head and said internal bore terminates in an annular flange which cooperates with said rounded head.
Claim 5
Dependent Claim
82 words
A fixation device as set forth in claim 3, further including cap means which cooperates with said anchor seat means to capture said stabilizer and wherein the stabilizer is a rod and the anchor seat means has a channel to receive said rod and said cap means has an opposing larger diameter portion which complements said channel and said larger diameter portion terminates in rod-receiving flanges and said nut cooperates with said rod-receiving flanges to apply said compression force to said rod.
Claim 6
Dependent Claim
210 words
A fixation device for the posterior stabilization of one or more bone segments of the spine, comprising: at least two anchors and an elongated stabilizer comprising a rod having a diameter and a longitudinal axis, said anchors each comprising anchoring means which secure said anchors to said bone segment and an anchor seat means which has a lower bone interface operatively joined to said bone segment and an anchor seat portion spaced apart from said bone interface including a channel to receive said rod; and securing means which cooperate with each of said anchor seat portions spaced apart from said bone interface and exterior to the bone relative to said elongated rod, said seat means including a vertical axis and first threads which extend in the direction of said vertical axis toward said lower bone interface to a depth below the diameter of the rod when it is in the rod receiving channel, and said securing means including second threads which cooperate with the first threads of the seat means to cause said rod to bear against said channel through the application of substantially equal compressive forces by said securing means in the direction of the vertical axis and applied on either side along said longitudinal axis of said channel.
Claim 7
Dependent Claim
210 words
A fixation device for the posterior stabilization of one or more bone segments of the spine, comprising: at least two anchors and an elongated stabilizer comprising a rod having a diameter and a longitudinal axis, said anchors each comprising anchoring means which secure said anchors to said bone segment and an anchor seat means which has a lower bone interface operatively joined to said bone segment and an anchor seat portion spaced apart from said bone interface including a channel to receive said rod; and securing means which cooperate with each of said anchor seat portions spaced apart from said bone interface and exterior to the bone relative to said elongated rod, said seat means including a vertical axis and first threads which extend in the direction of said vertical axis toward said lower bone interface to a depth below the diameter of the rod when it is in the rod receiving channel, and said securing means including second threads which cooperate with the first threads of the seat means to cause said rod to bear against said channel through the application of substantially equal compressive forces by said securing means in the direction of the vertical axis and applied on either side along said longitudinal axis of said channel.
Claim 8
Dependent Claim
33 words
A fixation device as set forth in claim 5, wherein said securing means includes a concave rod mating surface and said compressive force is applied to said rod by said rod mating surface.
Claim 9
Independent Claim
142 words
A device for the stabilization of one or more bone segments, comprising: at least two anchors and a rod having a diameter, said anchors each comprising screw means, an anchor seat, and a nut, said anchor seat including external threads and a channel to receive said rod and having a rod contacting surface in the bottom of the channel and said threads extending toward the rod contacting surface to a thread run-out, the distance between the rod contacting surface and the thread run-out being less than the diameter of the rod; and said nut including top and bottom surfaces and a relatively constant diameter through bore having threads which mate with the threads of the anchor seat and said nut being exterior to said rod and tightening down toward the rod whereby said bottom surface applies a compressive force to said rod.
Claim 10
Independent Claim
142 words
A device for the stabilization of one or more bone segments, comprising: at least two anchors and a rod having a diameter, said anchors each comprising screw means, an anchor seat, and a nut, said anchor seat including external threads and a channel to receive said rod and having a rod contacting surface in the bottom of the channel and said threads extending toward the rod contacting surface to a thread run-out, the distance between the rod contacting surface and the thread run-out being less than the diameter of the rod; and said nut including top and bottom surfaces and a relatively constant diameter through bore having threads which mate with the threads of the anchor seat and said nut being exterior to said rod and tightening down toward the rod whereby said bottom surface applies a compressive force to said rod.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-12-11 | 1999-06-12 | 1999-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-12-11 | 2003-06-12 | 2003-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-12-11 | 2007-06-12 | 2007-12-12 | $7700.00 | Window Closed / Lapsed |