Patent US5249200A successfully refreshed from Google Patents.
Patent US4713071A successfully refreshed from Google Patents.
US4713071A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heart valve prosthesis
Assignee: Individual
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Filing: 1986-09-10
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Granted: 1987-12-15
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Expires: 2006-09-10
Abstract
Abstract A heart valve prosthesis comprises a valve ring having an opening for the flow of blood, a valve poppet floatingly mounted during opening and closing. For floatingly containing the poppet, and there is provided a single upper support and a lower support structure. The upper support has a flat portion supporting the poppet that bears thereagainst with a depression made in the top side of the poppet. The lower support structure has tabs for supporting the poppet so that the poppet is in the surface-to-the surface contact with the upper support and tabs of the lower support structure when the poppet is in the open position.
Inventors
- 👤 Naum A. Iofis
- 👤 Rudolf N. Vettsel
- 👤 Alexandr S. Bukatov
- 👤 Semen G. Khurtsilava
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:27
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/24; A61F2/2403; A61F2/2406
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
369 words
A heart valve prosthesis comprising: a valve ring having an opening therein for the flow of blood, a valve poppet having a top side and a bottom side and a concentric depression in the top side thereof, said concentric depression including a surface portion, containing means for floatingly containing the poppet during opening and closing, said containing means being formed by a lower support structure for holding the bottom side of the poppet during closing and by a single upper support and stop member for engaging the top side of the poppet within the depression thereof, said upper support and stop member being mounted on a radial holder extending from said valve ring, said upper support having an inclined surface portion with a surface area which corresponds in surface configuration with and is in surface area contact with said surface portion of said concentric depression when said valve poppet is in an open position to permit blood to pass through said ring opening and is inclined with respect to a horizontal diametrical plane of the valve ring at an angle corresponding to the angle of inclination of the valve poppet with respect to the same plane when the poppet is in the open position to thereby define a stop, and said lower support structure having profiled end portions extending transversely with respect to said radial holder, the profiles of said end portions defining pivot surfaces for the poppet and corresponding to the profile of adjacent portions of the bottom side of the poppet on the sides of said end portions facing toward the holder for engaging the bottom side of the poppet with surface area contact in the open position of the poppet, the end portions of said lower support structure being spaced apart from each other with a clearance space therebetween, and the inclined surface portion of said upper support facing the space between the profiled end portions of said lower support structure, the surface area contact of the poppet with said surface portion of the upper support and said pivot surfaces of the lower support structure in the open position distributing support forces over said surface areas to reduce wear and prolong service life of the prosthesis.
Claim 2
Dependent Claim
369 words
A heart valve prosthesis comprising: a valve ring having an opening therein for the flow of blood, a valve poppet having a top side and a bottom side and a concentric depression in the top side thereof, said concentric depression including a surface portion, containing means for floatingly containing the poppet during opening and closing, said containing means being formed by a lower support structure for holding the bottom side of the poppet during closing and by a single upper support and stop member for engaging the top side of the poppet within the depression thereof, said upper support and stop member being mounted on a radial holder extending from said valve ring, said upper support having an inclined surface portion with a surface area which corresponds in surface configuration with and is in surface area contact with said surface portion of said concentric depression when said valve poppet is in an open position to permit blood to pass through said ring opening and is inclined with respect to a horizontal diametrical plane of the valve ring at an angle corresponding to the angle of inclination of the valve poppet with respect to the same plane when the poppet is in the open position to thereby define a stop, and said lower support structure having profiled end portions extending transversely with respect to said radial holder, the profiles of said end portions defining pivot surfaces for the poppet and corresponding to the profile of adjacent portions of the bottom side of the poppet on the sides of said end portions facing toward the holder for engaging the bottom side of the poppet with surface area contact in the open position of the poppet, the end portions of said lower support structure being spaced apart from each other with a clearance space therebetween, and the inclined surface portion of said upper support facing the space between the profiled end portions of said lower support structure, the surface area contact of the poppet with said surface portion of the upper support and said pivot surfaces of the lower support structure in the open position distributing support forces over said surface areas to reduce wear and prolong service life of the prosthesis.
Claim 3
Dependent Claim
55 words
A prosthesis according to claim 1, wherein the lower support structure is formed by two struts extending inwardly from the periphery of the ring, the profiled portions of the lower support structure extending transversely with respect to the radial holder and formed by tabs at distal ends of the struts of the lower support structure.
Claim 4
Dependent Claim
13 words
A prosthesis according to claim 2, wherein the tabs extend toward each other.
Claim 5
Dependent Claim
16 words
A prosthesis according to claim 2, wherein the tabs extend in opposite directions from each other.
Claim 6
Dependent Claim
47 words
A prosthesis according to claim 1, wherein the lower support structure is formed by two tabs secured to and extending inwardly of the valve ring, the tabs having profiled surfaces facing toward the bottom side of the poppet for surface engagement therewith and facing toward the holder.
Claim 7
Dependent Claim
45 words
A heart valve prosthesis according to claim 1, wherein the flat portion of the upper support is additionally inclined at an acute angle with respect to a plane drawn at right angles with respect to the plane of the radial holder of the upper support.
Claim 8
Dependent Claim
20 words
A prosthesis according to claim 6, wherein the angle of inclination of said acute angle is from 1° to 3°.
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) | 1990-12-14 | 1991-06-15 | 1991-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-14 | 1995-06-15 | 1995-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-14 | 1999-06-15 | 1999-12-15 | $7700.00 | Window Closed / Lapsed |