US5658345A
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US
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Artificial acetabulum and method for manufacture
Assignee: Sulzer Medizinaltechnik AG
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Filing: 1995-07-11
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Granted: 1997-08-19
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Expires: 2015-07-11
Abstract
Abstract The acetabulum (1) in accordance with the invention comprises a spherically formed outer shell (3) as well as a spherically formed inner shell (4) which is inserted into the outer shell (3). The inner shell (4) can, for example, consist of an oxide-ceramic material, in particular of aluminum oxide. The outer shell (4) can consist of, for example, titanium. The outer surface (4c) of the inner shell (4) is formed such that it has a first partial surface (4c) with increasing outer cross-section from the pole (2a) towards the equatorial opening (4b) to a site (4a) with a largest outer diameter, that a further partial surface (4e) with an outer cross-section decreasing towards the equatorial opening (4b) connects to the partial surface (4c), which goes into a further partial surface (4f) with increasing outer cross-section towards the equatorial opening. The outer shell (3) was plastically deformed at least in the region of the partial surface (4e), so that an operative connection results between the outer shell (3) and the inner shell (4) at least over the partial surface (4e).
Inventors
- 👤 Roland Willi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:28
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/32; A61F2/34; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/84; A61B17/86; A61F2/3094; A61F2002/30001; A61F2002/30316; A61F2002/30329; A61F2002/30331; A61F2002/30378; A61F2002/30476; A61F2002/30485; A61F2/30767; A61F2/30907; A61F2002/30909; A61F2002/3401; A61F2002/3412; A61F2002/3429; A61F2002/3445; A61F2002/3448; A61F2220/00; A61F2220/0025; A61F2220/0033; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00017; A61F2310/00023; A61F2310/00029; A61F2310/00179; A61F2310/00185; A61F2310/00203; A61F2310/00389; A61F2310/00395; A61F2310/00407; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49925
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
145 words
An artificial acetabulum (1) comprising: at least one spherically formed elastic outer shell (3) and at least one substantially inelastic inner shell (4); the elastic outer shell (3) having a pole (2a) and defining an equatorial opening (4b) with an inner surface of the elastic outer shell (3) having a partial surface with an inner cross-section decreasing toward an equatorial opening; the inelastic inner shell (4) having an outer surface (4c) with a partial surface (4e) with an outer cross-section decreasing towards the equatorial opening of the inner shell; the inner shell (4) being inserted into the outer shell (3) to elastically deform the outer shell (3) of the partial surface (4e) of the inner shell to generate an operative connection between the outer shell (3) and the partial surface (4e) so that the inner shell (4) is fixedly held by the outer shell (3).
Claim 2
Dependent Claim
145 words
An artificial acetabulum (1) comprising: at least one spherically formed elastic outer shell (3) and at least one substantially inelastic inner shell (4); the elastic outer shell (3) having a pole (2a) and defining an equatorial opening (4b) with an inner surface of the elastic outer shell (3) having a partial surface with an inner cross-section decreasing toward an equatorial opening; the inelastic inner shell (4) having an outer surface (4c) with a partial surface (4e) with an outer cross-section decreasing towards the equatorial opening of the inner shell; the inner shell (4) being inserted into the outer shell (3) to elastically deform the outer shell (3) of the partial surface (4e) of the inner shell to generate an operative connection between the outer shell (3) and the partial surface (4e) so that the inner shell (4) is fixedly held by the outer shell (3).
Claim 3
Dependent Claim
36 words
An acetabulum (1) in accordance with claim 1 and further comprising: the inner shell (4) having a flange-like part (4d) at the equatorial opening (4b), with the flange-like part (4d) projecting beyond the outer shell (3).
Claim 4
Dependent Claim
33 words
An acetabulum (1) in accordance with claim 1 and further including: a further shell (2) lying on an outer surface (3f) of the outer shell (4) and attached to the outer shell (4).
Claim 5
Dependent Claim
27 words
An acetabulum (1) in accordance with claim 3, and further including: the further shell (2) consists of titanium or steel, in particular formed as a wire braid.
Claim 6
Dependent Claim
27 words
An acetabulum (1) in accordance with claim 1 and further comprising: the inner shell (4) and/or the outer shell (3) has apertures (3b) for receiving securing means.
Claim 7
Dependent Claim
26 words
An acetabulum (1) in accordance with claim 1 and wherein: the outer shell (3) has apertures (3c) at its surface (3f) for receiving anchoring bodies (8).
Claim 8
Dependent Claim
139 words
Method for manufacturing an acetabulum (1) with a pole (2a), as well as an equatorial opening (4b) comprising the steps of: providing at least one spherically formed elastic outer shell (3) with an inner surface of the elastic outer shell having a partial surface with an inner cross-section decreasing toward the equatorial opening; providing a substantially inelastic inner shell (4), with an outer surface (4c) of the inner shell (4) having a partial surface (4e) with an outer cross-section decreasing towards the equatorial opening (4b); inserting the inner shell (4) into the outer shell (3), elastically deforming the outer shell (3) at least at the partial surface (4e), in order to generate an operative connection between the outer shell (3) and the partial surface (4e), so that the inner shell (4) is fixedly held by the outer shell (3).
Claim 9
Dependent Claim
139 words
Method for manufacturing an acetabulum (1) with a pole (2a), as well as an equatorial opening (4b) comprising the steps of: providing at least one spherically formed elastic outer shell (3) with an inner surface of the elastic outer shell having a partial surface with an inner cross-section decreasing toward the equatorial opening; providing a substantially inelastic inner shell (4), with an outer surface (4c) of the inner shell (4) having a partial surface (4e) with an outer cross-section decreasing towards the equatorial opening (4b); inserting the inner shell (4) into the outer shell (3), elastically deforming the outer shell (3) at least at the partial surface (4e), in order to generate an operative connection between the outer shell (3) and the partial surface (4e), so that the inner shell (4) is fixedly held by the outer shell (3).
Claim 10
Dependent Claim
73 words
Method for manufacturing an acetabulum (1) with a pole (2a), as well as an equatorial opening (4b) according to claim 9 comprising the further steps of: providing a further shell (2) capable of elastic deformation in the vicinity of the equatorial opening (4b); applying the further shell (2) to the outer shell (3), elastically deforming the further shell (2) such that the further shell (2) is fixedly connected to the outer shell (3).
Claim 11
Dependent Claim
45 words
Method for manufacturing an acetabulum (1) with a pole (2a), as well as an equatorial opening (4b) according to claim 8 comprising the further steps of: further shell (2) is of a material selected from the group consisting of titanium, steel, and a wire braid.
Claim 12
Dependent Claim
47 words
Method for manufacturing an acetabulum (1) with a pole (2a), as well as an equatorial opening (4b) according to claim 7 comprising the further steps of: the provided inner shell (4) consists of a material selected from the group consisting of a ceramic material, and a cobalt-chromium-alloy.
Claim 13
Dependent Claim
52 words
Method for manufacturing an acetabulum (1) with a pole (2a), as well as an equatorial opening (4b) according to claim 7 comprising the further steps of: the provided inner shell (4) has a flange-like part (4d) at the equatorial opening (4b), with the flange-like part (4d) projecting beyond the outer shell (3).
Claim 14
Dependent Claim
36 words
Method for manufacturing an acetabulum (1) with a pole (2a), as well as an equatorial opening (4b) according to claim 7 comprising the further steps of: the provided outer shell (3) consists of titanium, or steel.
Claim 15
Dependent Claim
48 words
Method for manufacturing an acetabulum (1) with a pole (2a), as well as an equatorial opening (4b) according to claim 7 comprising the further steps of: the provided inner shell (4) and/or the outer shell (3) has apertures (3b) for receiving securing means, such as bone screws (7).
Claim 16
Dependent Claim
43 words
Method for manufacturing an acetabulum (1) with a pole (2a), as well as an equatorial opening (4b) according to claim 7 comprising the further steps of: the provided outer shell (3) has apertures (3c) at its surface (3f) for receiving anchoring bodies (8).
Claim 17
Dependent Claim
8 words
The product of the process of claim 7.
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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) | 2000-08-18 | 2001-02-17 | 2001-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-08-18 | 2005-02-17 | 2005-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-08-18 | 2009-02-17 | 2009-08-19 | $7700.00 | Window Closed / Lapsed |