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US4795466A
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Artificial crucial ligament for a knee joint
Assignee: Sulzer AG
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Filing: 1987-03-02
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Granted: 1989-01-03
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Expires: 2007-03-02
Abstract
Abstract The artificial crucial ligament is formed of a plurality of tubes which are disposed in concentric relation to define a stem. Alternating tubes extend from the stem to form two branches. The tubes are made of textile structures to impart flexibility and longitudinal elasticity to the ligament. In one embodiment, the tubes are made of a braided construction.
Inventors
- 👤 Karl-Gerhart Stuhmer
- 👤 Otto Frey
- 👤 Rudolf Koch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:18
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/08; D; D03; D03D; D03D1/00; D10; D10B; D10B2509/00
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
41 words
An artificial crucial ligament for a knee joint, said ligament having a at least three layers of tubular textile structures disposed in concentric relation to define a stem with said layers extending from said stem to define a pair of branches.
Claim 2
Dependent Claim
41 words
An artificial crucial ligament for a knee joint, said ligament having a at least three layers of tubular textile structures disposed in concentric relation to define a stem with said layers extending from said stem to define a pair of branches.
Claim 3
Dependent Claim
41 words
An artificial crucial ligament as set forth in claim 1 wherein some of said layers extend from said stem to define one of said branches and others of said layers extend from said stem to define a second of said branches.
Claim 4
Dependent Claim
23 words
An artificial crucial ligament as set forth in claim 2 wherein said layers extend in alternating manner from said stem into said branches.
Claim 5
Dependent Claim
37 words
An artificial crucial ligament as set fort in claim 2 wherein the innermost layers in said stem extend into one of said branches and the outermost layers in said stem extend into the other of said branches.
Claim 6
Dependent Claim
22 words
An artificial crucial ligament as set forth in claim 1 wherein each layer extends from said stem into each of said branches.
Claim 7
Dependent Claim
17 words
An artificial crucial ligament as set forth in claim 1 wherein said layers define a hollow core.
Claim 8
Dependent Claim
18 words
An artificial crucial ligament as set forth in claim 1 wherein each layer is flexible and longitudinally elastic.
Claim 9
Dependent Claim
19 words
An artificial crucial ligament as set forth in claim 7 wherein each layer is made of a braided construction.
Claim 10
Dependent Claim
17 words
An artificial crucial ligament as set forth in claim 1 wherein each layer is made of threads.
Claim 11
Dependent Claim
42 words
An artificial crucial ligament comprising at least three tubular textile structures disposed in concentric relation to define a hollow stem and extending from said stem to define at least a pair of hollow branches, each said structure being flexible and longitudinally elastic.
Claim 12
Dependent Claim
42 words
An artificial crucial ligament comprising at least three tubular textile structures disposed in concentric relation to define a hollow stem and extending from said stem to define at least a pair of hollow branches, each said structure being flexible and longitudinally elastic.
Claim 13
Dependent Claim
18 words
An artificial crucial ligament as set forth in claim 10 wherein each tubular structure is made of threads.
Claim 14
Dependent Claim
29 words
An artificial crucial ligament as set forth in claim 11 wherein the outermost structures are made of threads having a greater diameter than the threads of the innermost structures.
Claim 15
Dependent Claim
20 words
An artificial crucial ligament as set forth in claim 10 wherein each tubular textile structure is made of braided construction.
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-01-03 | 1992-07-04 | 1993-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-03 | 1996-07-04 | 1997-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-03 | 2000-07-04 | 2001-01-03 | $7700.00 | Window Closed / Lapsed |