Patent US5002576A successfully refreshed from Google Patents.
US5002576A
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Intervertebral disk endoprosthesis
Assignee: GERHARD FUHRMANN
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Filing: 1989-06-06
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Granted: 1991-03-26
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Expires: 2009-06-06
Abstract
Abstract An intervertebral disk endoprosthesis is filled with an elastic material and provided with cover plates at its end faces, and has a circular or elliptical corrugated tube surrounding the viscoelastic material, the tube being terminated by cover plates.
Inventors
- 👤 Gerhard Fuhrmann
- 👤 Ulrich Gross
- 👤 Bertram Kaden
- 👤 Herman-Josef Schmitz
- 👤 Thomas Fritz
- 👤 Curt Kranz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:17
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/44; A61F2/441; A61F2/442; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/84; A61B17/86; A61F2/30767; A61F2/3094; A61F2/30965; A61F2002/30001; A61F2002/30003; A61F2002/3006; A61F2002/30062; A61F2002/30108; A61F2002/3011; A61F2002/30112; A61F2002/30136; A61F2002/30316; A61F2002/30329; A61F2002/30433; A61F2002/30535; A61F2002/30563; A61F2002/30565; A61F2002/30576; A61F2002/30578; A61F2002/30581; A61F2002/30583; A61F2/30771; A61F2002/30772; A61F2002/30906; A61F2210/00; A61F2210/0004; A61F2210/0085; A61F2220/00; A61F2220/0025; A61F2220/0041; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00017; A61F2310/00023; A61F2310/00389; A61F2310/00395; A61F2310/00401; A61F2310/00407; A61F2310/00592; A61F2310/00796; Y; Y10; Y10S; Y10S606/00; Y10S606/907
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
67 words
An intervertebral disk endoprosthesis filled with viscoelastic material and provided with cover plates at its end faces, comprising a circular or elliptical corrugated tube surrounding and contiguous with the viscoelastic material and terminated by the cover plates, wherein said cover plates are rigid, and wherein said corrugated tube allows for less constrained tilting of said cover plates, and further accommodates the compressive bulging of said viscoelastic material.
Claim 2
Dependent Claim
67 words
An intervertebral disk endoprosthesis filled with viscoelastic material and provided with cover plates at its end faces, comprising a circular or elliptical corrugated tube surrounding and contiguous with the viscoelastic material and terminated by the cover plates, wherein said cover plates are rigid, and wherein said corrugated tube allows for less constrained tilting of said cover plates, and further accommodates the compressive bulging of said viscoelastic material.
Claim 3
Dependent Claim
15 words
Endoprosthesis as defined in claim 1, wherein the corrugated tube is composed of biocompatible metal.
Claim 4
Dependent Claim
20 words
Endoprosthesis as defined in claim 1, wherein the viscoelastic material is filled completely or partially with oriented or unoriented fibers.
Claim 5
Dependent Claim
24 words
Endoprosthesis as defined in claim 3, wherein the filling is inhomogeneous, such that compressibility increases in the direction toward at least one edge region.
Claim 6
Dependent Claim
15 words
Endoprosthesis as defined in claim 1, wherein the viscoelastic material includes hardenable, originally liquid, components.
Claim 7
Dependent Claim
33 words
Endoprosthesis as defined in claim 5, wherein at least one of the cover plates and the corrugated tube are provided with at least one of a closable fill opening and a ventilation opening.
Claim 8
Dependent Claim
23 words
Endoprosthesis as defined in claim 1, wherein the corrugated tube is fastened to at least one cover plate by a screwable clamping device.
Claim 9
Dependent Claim
14 words
Endoprosthesis as defined in claim 7, wherein the clamping device is a clamping ring.
Claim 10
Dependent Claim
18 words
Endoprosthesis as defined in claim 1, wherein the corrugated tube is welded to at least one cover plate.
Claim 11
Dependent Claim
28 words
Endoprosthesis as defined in claim 1, wherein the a corrugated tube has a wall thickness which is variable in one of a transverse direction or the longitudinal direction.
Claim 12
Dependent Claim
33 words
Endoprosthesis as defined in claim 1, wherein at least one of the outwardly oriented end faces of the cover plate is provided with at least one of spurs, radial grooves, and circumferential grooves.
Claim 13
Dependent Claim
43 words
Endoprosthesis as defined in claim 1, wherein at least one of the outwardly oriented end faces of the cover plates and of the corrugated tube is provided with at least one of a porous, surface area enlarging coating, surface configuration, and surface regions.
Claim 14
Dependent Claim
26 words
Endoprosthesis as defined in claim 1, wherein at least one of the outwardly oriented frontal and side faces is provided with embedments of a bioactive material.
Claim 15
Dependent Claim
23 words
Endoprosthesis as defined in claim 13, wherein the bioactive face is composed of at least one of hydroxyl apatite, polylactide or HIP material.
Claim 16
Dependent Claim
74 words
An intervertebral disk endoprosthesis filled with viscoelastic material and provided with cover plates at its end faces, comprising a circular or elliptical corrugated tube surrounding and contiguous with the viscoelastic material and terminated by the cover plates, wherein at least one of said cover plates is provided with a flange, and wherein said corrugated tube allows for less constrained tilting of said cover plates, and further accommodates the compressive bulging of said viscoelastic material.
Claim 17
Dependent Claim
74 words
An intervertebral disk endoprosthesis filled with viscoelastic material and provided with cover plates at its end faces, comprising a circular or elliptical corrugated tube surrounding and contiguous with the viscoelastic material and terminated by the cover plates, wherein at least one of said cover plates is provided with a flange, and wherein said corrugated tube allows for less constrained tilting of said cover plates, and further accommodates the compressive bulging of said viscoelastic material.
Claim 18
Dependent Claim
19 words
Endoprosthesis as defined in claim 15, wherein the flange extends parallel to the center axis of the corrugated tube.
Claim 19
Dependent Claim
14 words
Endoprosthesis as defined in claim 16, wherein the flange is provided with a bore.
Claim 20
Dependent Claim
37 words
Endoprosthesis as defined in claim 17, wherein the direction of the bore diverges from the cover plate toward the center axis of the corrugated tube so that a screw passing through the bore constitutes a tension screw.
Claim 21
Dependent Claim
31 words
Endoprosthesis as defined in claim 17, wherein, on the side facing away from the center axis of the corrugated tube, the bore is provided with a recess for a screw head.
Claim 22
Dependent Claim
25 words
Endoprosthesis as defined in claim 15, wherein the exterior face of the cover plate is provided with grooves which are oriented perpendicularly to the flange.
Claim 23
Dependent Claim
35 words
Endoprosthesis as defined in claim 1, wherein the exterior of at least one of the cover plates is configured in such a way that it is adapted to the end faces of an adjacent vertebra.
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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) | 1994-03-25 | 1994-09-24 | 1995-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-03-25 | 1998-09-24 | 1999-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-03-25 | 2002-09-24 | 2003-03-26 | $7700.00 | Window Closed / Lapsed |