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US4643732A
Expired / Lapsed
US
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Heart valve prosthesis
Assignee: Beiersdorf AG
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Filing: 1985-10-21
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Granted: 1987-02-17
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Expires: 2005-10-21
Abstract
Abstract A heart valve prosthesis with a valve housing in the form of a ring and a curved valve which is mounted within the housing and which is hinged to the valve ring by means of a flat flexible small lug which, if appropriate, is drawn in one region through a slot in the valve ring, is characterized in that the valve and the ring each consist of two rigidly joined halves fitting respectively onto or into each other, and the end portions of the small lug in the form of a short strip are embedded "sandwich"-like between the valve halves on one side and between the ring halves on the other side.
Inventors
- 👤 Hanns Pietsch
- 👤 Holger Kartheus
- 👤 Helmut Reul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:00
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/24; A61F2/2403; A61F2/2412
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
98 words
A heart valve prosthesis consisting of a valve housing in the form of a ring and a curved valve which is mounted within the housing and which is hinged to the valve ring by means of a flat flexible small lug, is characterised in that the valve and the ring each consist of two rigidly joined halves fitting respectively onto or into each other and the end portions of the small lug in the form of a short strip are embedded "sandwich"-like between the valve halves on one side and between the ring halves on the other side.
Claim 2
Dependent Claim
98 words
A heart valve prosthesis consisting of a valve housing in the form of a ring and a curved valve which is mounted within the housing and which is hinged to the valve ring by means of a flat flexible small lug, is characterised in that the valve and the ring each consist of two rigidly joined halves fitting respectively onto or into each other and the end portions of the small lug in the form of a short strip are embedded "sandwich"-like between the valve halves on one side and between the ring halves on the other side.
Claim 3
Dependent Claim
86 words
A heart valve prosthesis with a valve housing in the form of a ring and a curved valve which is mounted within the housing and which is hinged to the valve ring by means of a flat flexible small lug, characterised in that the valve and the ring each consist of two rigidly joined halves fitting respectively onto or into each other, and the small lug is formed integrally with the inner ring half and its free end is embedded "sandwich"-like between the two valve halves.
Claim 4
Dependent Claim
86 words
A heart valve prosthesis with a valve housing in the form of a ring and a curved valve which is mounted within the housing and which is hinged to the valve ring by means of a flat flexible small lug, characterised in that the valve and the ring each consist of two rigidly joined halves fitting respectively onto or into each other, and the small lug is formed integrally with the inner ring half and its free end is embedded "sandwich"-like between the two valve halves.
Claim 5
Dependent Claim
21 words
A heart valve prosthesis according to claims 1 or 2, characterised in that the curved valve is flattened towards the hinge.
Claim 6
Dependent Claim
34 words
A heart valve prosthesis according to claims 1 or 2 characterised in that the small lug forming the hinge has a thickness of 0.1 to 2.0 mm and round contours on the side edges.
Claim 7
Dependent Claim
48 words
A heart valve prosthesis according to claims 1 or 2 characterised in that the small lug forming the hinge, or the small lug and the inner ring half formed integrally with it, consists of rubber-elastic polyether-urethanes, polyether-ureas, polyether-urethane/silicone hybrid elastomers, ethylene/propylene copolymers (EPM), ethylene/propylene/diene copolymers (EPDM) or polydimethylsiloxanes.
Claim 8
Dependent Claim
47 words
A heart valve prosthesis according to claims 1 or 2, characterised in that the small lug forming the hinge, or the small lug and the inner ring half formed integrally with it, consists of polydimethylsiloxane (silicone rubber) or a copolymer of ethylene, propylene and a diene (EPDM).
Claim 9
Dependent Claim
49 words
A heart valve prosthesis according to claims 1 or 2, characterised in that the ring and valve halves of the outer ring half and the valve halves respectively consist of a thermoplastic such as low-pressure polyethylene, polycarbonate, polyoxymethylene or polyether-sulphone and have preferably been produced by the injection-moulding process.
Claim 10
Dependent Claim
32 words
A heart valve prosthesis according to claims 1 or 2, characterised in that the valve and ring halves are each adhesively bonded or welded to one another and to the small lug.
Claim 11
Dependent Claim
17 words
A heart valve prosthesis according to claim 8, characterised in that the components are welded together ultrasonically.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-02-16 | 1990-08-18 | 1991-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-16 | 1994-08-18 | 1995-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-16 | 1998-08-18 | 1999-02-17 | $7700.00 | Window Closed / Lapsed |