US6527806B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intervertebral spacer device having a spiral wave washer force restoring element
Assignee: Howmedica Osteonics Corp
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Filing: 2001-07-16
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Granted: 2003-03-04
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Expires: 2021-07-16
Abstract
Abstract An intervertebral spacer device having a pair of opposing plates for seating against opposing vertebral bone surfaces, separated by at least one force restoring element. The preferred force restoring mechanism is a spiral-shaped radially diminishing amplitude wave washer.
Inventors
- 👤 James D. Ralph
- 👤 Steven Tatar
- 👤 Joseph P. Errico
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:53
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/44; A61F2/442; A61F2/4425; A61F2/30767; A61F2002/30001; A61F2002/30108; A61F2002/3011; A61F2002/30112; A61F2002/30136; A61F2002/30199; A61F2002/30291; A61F2002/30316; A61F2002/30317; A61F2002/30326; A61F2002/30329; A61F2002/30433; A61F2002/30476; A61F2002/30492; A61F2002/30495; A61F2002/305; A61F2002/30518; A61F2002/30535; A61F2002/30563; A61F2002/30565; A61F2002/30573; A61F2002/30574; A61F2002/30604; A61F2/30771; A61F2002/30772; A61F2002/30774; A61F2002/3092; A61F2/3094; A61F2002/30975; A61F2002/443; A61F2220/00; A61F2220/0025; A61F2220/0041; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0063; A61F2230/0091; A61F2250/00; A61F2250/0014; A61F2250/0037; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00017; A61F2310/00023; A61F2310/00365
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
116 words
An intervertebral spacer device comprising: first and second plate members, said plates being disposed in a spaced apart relationship such that one plate surface of said first plate faces one plate surface of the other plate, said facing surfaces being inner surfaces, and the alternative faces of each plate being outer surfaces; and at least one restoring force providing element disposed between the inner surfaces of said first and second plate members, and disposed such that a compressive load applied to the external faces of said plates is counteracted by said at least one restoring force providing element, said at least one restoring force providing element including at least one spiral-shaped radially diminishing amplitude wave washer.
Claim 2
Dependent Claim
116 words
An intervertebral spacer device comprising: first and second plate members, said plates being disposed in a spaced apart relationship such that one plate surface of said first plate faces one plate surface of the other plate, said facing surfaces being inner surfaces, and the alternative faces of each plate being outer surfaces; and at least one restoring force providing element disposed between the inner surfaces of said first and second plate members, and disposed such that a compressive load applied to the external faces of said plates is counteracted by said at least one restoring force providing element, said at least one restoring force providing element including at least one spiral-shaped radially diminishing amplitude wave washer.
Claim 3
Dependent Claim
26 words
The device as set forth in claim 1 , wherein the at least one wave washer further comprises a single spiral-shaped radially diminishing amplitude wave washer.
Claim 4
Dependent Claim
46 words
The device as set forth in claim 1 , further comprising a flexible circumferential skirt disposed about and between lateral perimeters of said first and second plate members, therein defining an interior volume of said device in which said at least one wave washer is disposed.
Claim 5
Dependent Claim
18 words
The device as set forth in claim 3 , wherein said flexible circumferential skirt comprises a resilient material.
Claim 6
Dependent Claim
16 words
The device as set forth in claim 4 , wherein said flexible circumferential skirt is porous.
Claim 7
Dependent Claim
26 words
The device as set forth in claim 1 , wherein said at least one spiral-shaped radially diminishing amplitude wave washer comprises multiple ones of said washer.
Claim 8
Dependent Claim
78 words
The device as set forth in claim 1 , wherein at least one of said first and second plate members includes a threaded hole, and wherein said spiral-shaped radially diminishing amplitude wave washer includes a hole, which holes maybe aligned, and wherein said device further includes a screw for securing said spiral-shaped radially diminishing amplitude wave washer to the inner surface of said at least one of said first and second plate members which includes the threaded hole.
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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) | 2006-03-03 | 2006-09-02 | 2007-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-03-03 | 2010-09-02 | 2011-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-03-03 | 2014-09-02 | 2015-03-04 | $7700.00 | Window Closed / Lapsed |