US4263680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prosthetic closure devices to replace the valves in human hearts
Assignee: Beiersdorf AG
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Filing: 1979-03-19
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Granted: 1981-04-28
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Expires: 1999-03-19
Abstract
Abstract A prosthetic closure device to replace a human heart valve, in particular the mitral or tricuspid valve, comprises an annular valve body, around the periphery of which a suture ring is provided for attaching the valve body to the heart tissue, and a valve member located in the valve body. The valve member is in the form of a spherical segment having a diameter of 1.058 Dri and comprising part of the surface of a hollow sphere having a diameter of 2Dri, where Dri is the smallest inner diameter of the valve body. The valve member is hinged to the valve body by means of a flap formed integrally with the valve member and which projects through a slot in the valve body, where it is secured by the suture ring, to form a hinge. The inner surface of the valve body narrows conically in the direction of inflow and subsequently widens to provide an annular seating for the valve member.
Inventors
- 👤 Helmut Reul
- 👤 Ernst-Wilhelm Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:02
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/24; A61F2/2403; F; F16; F16K; F16K15/00; F16K15/02; F16K15/03; F16K15/031; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7898
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
145 words
A prosthetic heart valve for controlling the flow of blood, said valve comprising: a ring-like valve body through which the blood flows; and a dome-like valve member in said body, said valve member being formed as a segment of a hollow sphere and presenting a convex surface to the blood in its normal direction of flow through the valve, said valve member being connected to the said valve ring by a hinge for pivotal movement between an open position permitting blood flow through said body and a closed position in which said member rests on a generally annular supporting surface in the interior of said valve body to block blood flow, said hinge including a flexible flap affixed to a portion of the periphery of said valve member, said flap extending through a slot in said valve body and being secured to the exterior thereof.
Claim 2
Dependent Claim
145 words
A prosthetic heart valve for controlling the flow of blood, said valve comprising: a ring-like valve body through which the blood flows; and a dome-like valve member in said body, said valve member being formed as a segment of a hollow sphere and presenting a convex surface to the blood in its normal direction of flow through the valve, said valve member being connected to the said valve ring by a hinge for pivotal movement between an open position permitting blood flow through said body and a closed position in which said member rests on a generally annular supporting surface in the interior of said valve body to block blood flow, said hinge including a flexible flap affixed to a portion of the periphery of said valve member, said flap extending through a slot in said valve body and being secured to the exterior thereof.
Claim 3
Dependent Claim
25 words
A heart valve according to claim 1 wherein said valve member is truncated and said valve body is flattened in the region of said hinge.
Claim 4
Dependent Claim
37 words
The heart valve according to claim 2 wherein said hinge has a length within a range of 0.4 D ri to 0.5 D ri , wherein D ri is the smallest inner diameter of said valve body.
Claim 5
Dependent Claim
57 words
The heart valve according to claim 1 wherein said valve member generally represents that part of the surface of a hollow sphere having a diameter D sph =2 D ri which is intersected by a circle of the diameter D disc =1.058 D ri , wherein D ri is the smallest inner diameter of said valve body.
Claim 6
Dependent Claim
19 words
The heart valve according to claim 1 wherein the thickness of said valve member is less than 0.4 mm.
Claim 7
Dependent Claim
24 words
The heart valve according to claim 1 wherein said valve member comprises a metal sheet coated on both sides with a blood-compatible synthetic material.
Claim 8
Dependent Claim
35 words
The heart valve according to claim 6 wherein said flexible flap is integrally formed with said valve member and consists of the same blood-compatible synthetic material as that by which the metal substrate is coated.
Claim 9
Dependent Claim
25 words
The heart valve according to claim 6 wherein said valve member has a layer of epoxy compound intermediate said metal sheet and blood-compatible synthetic material.
Claim 10
Dependent Claim
31 words
The heart valve according to claim 6 wherein said metal sheet has a plurality of apertures through which the layers of synthetic material on both sides of said sheet are interconnected.
Claim 11
Dependent Claim
30 words
The heart valve according to claim 1 further including a suture ring on the exterior of said valve body for attaching the valve body to the tissue of the heart.
Claim 12
Dependent Claim
23 words
The heart valve according to claim 10 wherein said valve body has a channel-like recess on its exterior for receiving the suture ring.
Claim 13
Dependent Claim
35 words
The heart valve according to claim 1 wherein the interior of said valve ring initially converges in the direction of blood flow and subsequently diverges to provide said annular supporting surface for said valve member.
Claim 14
Dependent Claim
26 words
The heart valve according to claim 12 wherein said slot for said flap is located in the diverging portion of the interior of said valve ring.
Claim 15
Dependent Claim
28 words
The heart valve according to claim 6 wherein said valve body is formed of metal and is coated with the same blood-compatible synthetic material as said valve member.
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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) | 1984-04-27 | 1984-10-27 | 1985-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-27 | 1988-10-27 | 1989-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-27 | 1992-10-27 | 1993-04-28 | $7700.00 | Window Closed / Lapsed |