US5693100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Middle expandable intervertebral disk implant
Assignee: Individual
•
Filing: 1996-03-15
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Granted: 1997-12-02
•
Expires: 2016-03-15
Abstract
Abstract Artificial disk implant and methods for implanting same, the implant, in one embodiment, having a member for adapting in size and shape to the anatomical space between vertebrae, and apparatus for expanding the member to conform to the space. In one preferred embodiment, there is provided an artificial intervertebral disk implant having a cylindrical body comprised of cylindrical subunits capable of expansion. In another preferred embodiment, rectangular subunits capable of expansion are provided. The implant can be used alone or in various combinations for the purpose of spinal fusion.
Inventors
- 👤 Madhavan Pisharodi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:49
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/44; A61F2/4455; A61F2/442; A61F2/446; A61F2/30721; A61F2/30744; A61F2/28; A61F2002/2835; A61F2002/30001; A61F2002/30003; A61F2002/3006; A61F2002/30092; A61F2002/30108; A61F2002/3011; A61F2002/30112; A61F2002/30113; A61F2002/30138; A61F2002/30143; A61F2002/30146; A61F2002/30153; A61F2002/30154; A61F2002/30199; A61F2002/30224; A61F2002/30225; A61F2002/30235; A61F2002/30261; A61F2002/3028; A61F2002/30291; A61F2002/30293; A61F2002/30316; A61F2002/30329; A61F2002/30405; A61F2002/30433; A61F2002/30451; A61F2002/30471; A61F2002/30476; A61F2002/30507; A61F2002/30535; A61F2002/30537; A61F2002/30556; A61F2002/30565; A61F2002/30573; A61F2002/30579; A61F2002/30594; A61F2002/30599; A61F2002/30621; A61F2002/30624; A61F2/30767; A61F2/30771; A61F2002/30772; A61F2002/30777; A61F2002/30784; A61F2002/30787; A61F2210/00; A61F2210/0014; A61F2220/00; A61F2220/0025; A61F2220/0041; A61F2220/0058; A61F2220/0091; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0006; A61F2230/0017; A61F2230/0019; A61F2230/0021; A61F2230/0063; A61F2230/0069; A61F2230/0082; A61F2230/0091; A61F2250/00; A61F2250/0004; A61F2250/0009; A61F2250/0058; A61F2250/006; A61F2250/0063; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00023
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
186 words
An implant for disposition in the space between two adjacent vertebrae after removal of a portion of the intervertebral disk therefrom comprising: an elongate, threaded rod; a first end cap mounted to said rod; a second end cap threadedly engaging said rod for moving along said rod relative to said first end cap when said rod is rotated along the threads on said rod; and a plurality of hinged subunits mounted between said first and second end caps and hingedly connected thereto, said hinged subunits comprising hinges which are movable from a first position surrounding and in close proximity to said rod so as to minimize the vertical dimension of the implant to facilitate insertion into the opening of the disk space to a second position with maximal vertical dimension by radially outward expansion of the hinges of said hinged subunits upon rotation of said rod after insertion into the disk space from which a portion of the disk has been removed to conform the shape of the implant to the shape of the anatomical region of the space from which the disk has been removed.
Claim 2
Dependent Claim
186 words
An implant for disposition in the space between two adjacent vertebrae after removal of a portion of the intervertebral disk therefrom comprising: an elongate, threaded rod; a first end cap mounted to said rod; a second end cap threadedly engaging said rod for moving along said rod relative to said first end cap when said rod is rotated along the threads on said rod; and a plurality of hinged subunits mounted between said first and second end caps and hingedly connected thereto, said hinged subunits comprising hinges which are movable from a first position surrounding and in close proximity to said rod so as to minimize the vertical dimension of the implant to facilitate insertion into the opening of the disk space to a second position with maximal vertical dimension by radially outward expansion of the hinges of said hinged subunits upon rotation of said rod after insertion into the disk space from which a portion of the disk has been removed to conform the shape of the implant to the shape of the anatomical region of the space from which the disk has been removed.
Claim 3
Dependent Claim
32 words
The implant of claim 1 additionally comprising a lock nut for engaging said rod to prevent rotation of said rod after expansion of the hinges of said subunits to said second position.
Claim 4
Dependent Claim
26 words
The implant of claim 1 wherein said second end cap receives said rod in a threaded hole, said rod being inlaid in said second end cap.
Claim 5
Dependent Claim
31 words
The implant of claim 1 additionally comprising means for preventing rotation of said rod after expansion of the hinges of said hinged subunits from said first position to said second position.
Claim 6
Dependent Claim
17 words
The implant of claim 4 wherein said rotation preventing means is inlaid in said second end cap.
Claim 7
Dependent Claim
22 words
The implant of claim 4 wherein said rotation preventing means comprises a screw threadably engaging the threads in said second end cap.
Claim 8
Dependent Claim
11 words
The implant of claim 1 wherein said hinged subunits are angled.
Claim 9
Dependent Claim
41 words
The implant of claim 1 wherein said hinged subunits are provided with bearing surfaces which cause the hinges of said hinged subunits to tend to move radially outwardly from said first position to said second position upon rotation of said rod.
Claim 10
Dependent Claim
31 words
The implant of claim 1 wherein said hinged subunits are provided with beveled sides to minimize the vertical dimension of the implant when said hinged subunits are in said first position.
References Cited (Backward Citations)
US725874A
Cited
US2226078A
Cited
US3030903A
Cited
US3648294A
Cited
US3867728A
Cited
US3986383A
Cited
DE2701279A1
Cited
SU662082A1
Cited
US4465220A
Cited
SU906548A1
Cited
US4401112A
Cited
US4309777A
Cited
SU1122304A1
Cited
SU1127905A1
Cited
US4553273A
Cited
US4657550A
Cited
EP0260044A1
Cited
US4863476A
Cited
US4932969A
Cited
US4834757A
Cited
US4759769A
Cited
US4863477A
Cited
EP0304305A1
Cited
US4772287A
Cited
DE3729600A1
Cited
US5002576A
Cited
US5522899A
Cited
FR2639823A1
Cited
US4932975A
Cited
US5059193A
Cited
US5171278A
Cited
US5390683A
Cited
US5290312A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-12-01 | 2001-06-02 | 2001-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-12-01 | 2005-06-02 | 2005-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-12-01 | 2009-06-02 | 2009-12-02 | $7700.00 | Window Closed / Lapsed |