Patent US4961748A successfully refreshed from Google Patents.
US4961748A
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US
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Sleeve for an acetabulum
Assignee: Sulzer AG
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Filing: 1989-08-11
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Granted: 1990-10-09
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Expires: 2009-08-11
Abstract
Abstract The metal sleeve which is formed with the slot along a generatrix, comprises zones of relatively large wall thickness (D) and zones of relatively reduced wall thickness (d) in alternative relationship around the periphery. The zones of reduced wall thickness are in the form of annular sectors of finite length having parallel walls and radiused transitions into zones of relatively large wall thickness (D). When an insert is pressed in, the sleeve is expanded very uniformly over the entire periphery.
Inventors
- 👤 Otto Frey
- 👤 Rudolf Koch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:42
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/32; A61F2/34; A61F2002/30001; A61F2002/30108; A61F2002/3011; A61F2002/30112; A61F2002/30131; A61F2002/30316; A61F2002/30317; A61F2002/30324; A61F2002/30326; A61F2002/30329; A61F2002/30331; A61F2002/30332; A61F2002/30535; A61F2002/30576; A61F2002/30578; A61F2002/30594; A61F2/30721; A61F2/30734; A61F2002/30738; A61F2002/3453; A61F2002/3462; A61F2002/348; A61F2002/3485; A61F2220/00; A61F2220/0025; A61F2220/0033; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0013; A61F2250/00; A61F2250/0014; A61F2250/0036; A61F2250/0037; A61F2310/00; A61F2310/00005; A61F2310/00011
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
94 words
A metal sleeve for an acetabulum having a frustum-shaped shell with a slot extending on one side from a base end to an apex end thereof and splitting said shell, said shell having a plurality of peripheral first zones of relatively large wall thickness and second zones of relatively small wall thickness alternating circumferentially about said shell, each second zone of relatively small wall thickness having an elongated annular sector and a transition portion at each end of said sector merging on a radius into an adjacent first zone of relatively large wall thickness.
Claim 2
Dependent Claim
94 words
A metal sleeve for an acetabulum having a frustum-shaped shell with a slot extending on one side from a base end to an apex end thereof and splitting said shell, said shell having a plurality of peripheral first zones of relatively large wall thickness and second zones of relatively small wall thickness alternating circumferentially about said shell, each second zone of relatively small wall thickness having an elongated annular sector and a transition portion at each end of said sector merging on a radius into an adjacent first zone of relatively large wall thickness.
Claim 3
Dependent Claim
30 words
A sleeve as set forth in claim 1 wherein said radius is from 0.5 to 1.0 millimeter and each sector has a peripheral length at least four times said radius.
Claim 4
Dependent Claim
23 words
A sleeve as set forth in claim 1 wherein a pair of said first zones of relatively large wall thickness bound said slot.
Claim 5
Dependent Claim
39 words
A sleeve as set forth in claim 1 wherein said first zones of relatively large wall thickness are of a peripheral length equal to a multiple of the peripheral length of said second zones of relatively small wall thickness.
Claim 6
Dependent Claim
26 words
A sleeve as set forth in claim 1 wherein each second zone of relatively small wall thickness has a recess at at least one axial end.
Claim 7
Dependent Claim
25 words
A sleeve as set forth in claim 1 wherein each zone is of increasing thickness from an apex end thereof to a base end thereof.
Claim 8
Dependent Claim
53 words
A sleeve as set forth in claim 1 wherein a pair of first zones of relatively large wall thickness bound said slot and are disposed diametrically opposite a pair of first zones of relatively large wall thickness, each said first zone of said pairs of first zones having an outwardly directed tab thereon.
Claim 9
Dependent Claim
26 words
A sleeve as set forth in claim 7 wherein said tabs on said first zones opposite said slot include bores for passage of bone screws therethrough.
Claim 10
Dependent Claim
29 words
A sleeve as set forth in claim 1 which further has radially inwardly directed abutments on said first zones of relatively large wall thickness at an apex end thereof.
Claim 11
Dependent Claim
26 words
A sleeve as set forth in claim 9 which further comprises a spike extending from at least one abutment towards said base end of said shell.
Claim 12
Dependent Claim
94 words
A sleeve for an acetabulum having an annular wall forming a frustum-shape shell with a slot extending from an apex end to a base end thereof and splitting said sleeve, said wall comprising a plurality of peripheral first zones of relatively large wall thickness and second zones of relatively small wall thickness alternating circumferentially about said shell, each second zone of relatively small wall thickness having an elongated annular sector and a transition portion at each end of said sector merging on a radius into an adjacent first zone of relatively large wall thickness.
Claim 13
Dependent Claim
94 words
A sleeve for an acetabulum having an annular wall forming a frustum-shape shell with a slot extending from an apex end to a base end thereof and splitting said sleeve, said wall comprising a plurality of peripheral first zones of relatively large wall thickness and second zones of relatively small wall thickness alternating circumferentially about said shell, each second zone of relatively small wall thickness having an elongated annular sector and a transition portion at each end of said sector merging on a radius into an adjacent first zone of relatively large wall thickness.
Claim 14
Dependent Claim
30 words
A sleeve as set forth in claim 11 wherein said radius is from 0.5 to 1.0 millimeter and each sector has a peripheral length at least four times said radius.
Claim 15
Dependent Claim
22 words
A sleeve as set forth in claim 12 wherein a pair of first zones of relatively large wall thickness bound said slot.
Claim 16
Dependent Claim
26 words
A sleeve as set forth in claim 12 wherein each second zone of relatively small wall thickness has a recess at at least one axial end.
Claim 17
Dependent Claim
21 words
A sleeve as set forth in claim 12 having an outwardly directed tab on at least one of said first zones.
Claim 18
Dependent Claim
29 words
A sleeve as set forth in claim 11 wherein said first zones are of a peripheral length equal to a multiple of the peripheral length of said second zones.
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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) | 1993-10-08 | 1994-04-09 | 1994-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-08 | 1998-04-09 | 1998-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-08 | 2002-04-09 | 2002-10-09 | $7700.00 | Window Closed / Lapsed |