Patent US2897596A successfully refreshed from Google Patents.
Patent US3808411A successfully refreshed from Google Patents.
US6468310B1
Expired / Lapsed
US
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Intervertebral spacer device having a wave washer force restoring element
Assignee: Howmedica Osteonics Corp
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Filing: 2001-07-16
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Granted: 2002-10-22
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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 wave washer. In a first embodiment the wave washer is ring-shaped. In a second embodiment the wave washer is spiral-shaped.
Inventors
- 👤 James D. Ralph
- 👤 Steven Tatar
- 👤 Joseph P. Errico
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:30
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; A61F2002/30159; A61F2002/30171; A61F2002/30199; A61F2002/302; 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; A61F2002/30594; 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; A61F2230/0028; A61F2230/005; A61F2230/0063; A61F2230/0065; A61F2230/0091; A61F2250/00; A61F2250/0014; A61F2250/0037; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00017; A61F2310/00023; A61F2310/00365
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
135 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 said second plate, said facing surfaces being inner surfaces, and 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 outer surfaces 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 wave washer; wherein the at least one wave washer further comprises a ring-shaped wave washer; and wherein said ring-shaped wave washer further includes a radial slot.
Claim 2
Dependent Claim
135 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 said second plate, said facing surfaces being inner surfaces, and 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 outer surfaces 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 wave washer; wherein the at least one wave washer further comprises a ring-shaped wave washer; and wherein said ring-shaped wave washer further includes a radial slot.
Claim 3
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 4
Dependent Claim
18 words
The device as set forth in claim 2 , wherein said flexible circumferential skirt comprises a resilient material.
Claim 5
Dependent Claim
16 words
The device as set forth in claim 2 , wherein said flexible circumferential skirt is porous.
Claim 6
Dependent Claim
20 words
The device as set forth in claim 1 , wherein said at least one wave washer comprises multiple wave washers.
Claim 7
Dependent Claim
21 words
The device as set forth in claim 5 , wherein said multiple wave washers comprise a plurality of concentric wave washers.
Claim 8
Dependent Claim
32 words
The device as set forth in claim 1 , wherein at least one of said first and second plate members includes a wave washer securing mechanism mounted to the inner surface thereof.
Claim 9
Dependent Claim
109 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 said second plate, said facing surfaces being inner surfaces, and the alternative faces of each plate being outer surfaces; and at least one ring-shaped wave washer disposed between the inner surfaces of said first and second plate members, and disposed such that a compressive load applied to the outer surfaces of said plates is counteracted by said at least one ring-shaped wave washer; wherein said at least one ring-shaped wave washer further includes a radial slot.
Claim 10
Dependent Claim
109 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 said second plate, said facing surfaces being inner surfaces, and the alternative faces of each plate being outer surfaces; and at least one ring-shaped wave washer disposed between the inner surfaces of said first and second plate members, and disposed such that a compressive load applied to the outer surfaces of said plates is counteracted by said at least one ring-shaped wave washer; wherein said at least one ring-shaped wave washer further includes a radial slot.
Claim 11
Dependent Claim
46 words
The device as set forth in claim 8 , 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 12
Dependent Claim
18 words
The device as set forth in claim 9 , wherein said flexible circumferential skirt comprises a resilient material.
Claim 13
Dependent Claim
122 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 multiple wave washers; wherein said multiple wave washers comprise a plurality of concentric wave washers.
Claim 14
Dependent Claim
122 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 multiple wave washers; wherein said multiple wave washers comprise a plurality of concentric wave washers.
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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) | 2005-10-21 | 2006-04-22 | 2006-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-10-21 | 2010-04-22 | 2010-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-10-21 | 2014-04-22 | 2014-10-22 | $7700.00 | Window Closed / Lapsed |