Patent US2589843A successfully refreshed from Google Patents.
Patent US4676789A successfully refreshed from Google Patents.
US4676789A
Expired / Lapsed
US
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Heart valve
Assignee: Medtronic Inc
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Filing: 1985-05-16
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Granted: 1987-06-30
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Expires: 2005-05-16
Abstract
Abstract Bileaflet biconical heart valve which duplicates the hemodynamics of a natural heart valve in the human heart where tips of biconical halves of the heart valve pivot outwardly in a manner representing that of natural heart valve tissue. In one embodiment of the present invention, biconical halves move about outflow pivots while in two other embodiments, the biconical halves pivot on outflow pivots where each biconical half pivots about or on two spaced pivots extending inwardly from an orifice ring at adjacent lower ends of each biconical half.
Inventors
- 👤 H. Rahbek Sorensen
- 👤 Arne Woien
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; A61F2/24; A61F2/2409; A61F2/2403; A61F2/2406
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
Heart valve comprising: a. orifice ring; b. opposing pairs of symmetrically spaced pivots extending inwardly from a lower portion of said orifice ring, said pivots lying on a plane substantially perpendicularly to the axis of said orifice ring; c. opposing pairs of symmetrically spaced inwardly extending conical leaflet retainer protrusions from a mid portion of said orifice ring; d. opposing pairs of symmetrically spaced inwardly extending elongated leaflet stops extending from an upper portion of said orifice ring; e. opposing pairs of symmetrically spaced closure protrusions extending inwardly from a mid portion of said interior of said orifice ring, and; f. two biconical occluding leaflets for substantially horizontal rotational movement around said pivots, each of said leaflets including pivot slots for accepting said pivots, said leflets also pivoting about said leaflet retainer protrusions and between said closure protrusions in a closed occluding position and to said leaflet stop in a non-occluding open position.
Claim 2
Dependent Claim
153 words
Heart valve comprising: a. orifice ring; b. opposing pairs of symmetrically spaced pivots extending inwardly from a lower portion of said orifice ring, said pivots lying on a plane substantially perpendicularly to the axis of said orifice ring; c. opposing pairs of symmetrically spaced inwardly extending conical leaflet retainer protrusions from a mid portion of said orifice ring; d. opposing pairs of symmetrically spaced inwardly extending elongated leaflet stops extending from an upper portion of said orifice ring; e. opposing pairs of symmetrically spaced closure protrusions extending inwardly from a mid portion of said interior of said orifice ring, and; f. two biconical occluding leaflets for substantially horizontal rotational movement around said pivots, each of said leaflets including pivot slots for accepting said pivots, said leflets also pivoting about said leaflet retainer protrusions and between said closure protrusions in a closed occluding position and to said leaflet stop in a non-occluding open position.
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) | 1990-06-29 | 1990-12-29 | 1991-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-29 | 1994-12-29 | 1995-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-29 | 1998-12-29 | 1999-06-30 | $7700.00 | Window Closed / Lapsed |