US5104406A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heart valve prosthesis
Assignee: Sorin Biomedica Cardio SpA
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Filing: 1991-02-21
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Granted: 1992-04-14
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Expires: 2011-02-21
Abstract
Abstract A heart valve prosthesis has a suture ring with a core for form-coupling with the stent of the prosthesis so that the suture ring and the stent are held securely together axially, while the core can rotate relative to the stent. The suture ring has a covering which cooperates with the surface of the stent and is in contact therewith. The degree of contact determines the resistance to relative rotation of the ring and the stent.
Inventors
- 👤 Maria Curcio
- 👤 Enrico Pasquino
- 👤 Stefano Rinaldi
- 👤 Franco Vallana
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:48
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/24; A61F2/2409; Y; Y10; Y10S; Y10S623/00; Y10S623/90
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
128 words
A heart valve prosthesis comprising a stent, obturator means mounted in the stent, and a suture ring which is fitted around the stent, wherein the suture ring has a core with means which engage the stent and can hold the ring and the stent together axially whilst enabling the core of the ring to rotate relative to the stent, and a covering is applied to the core by directly stitching the covering to the core, at least part of said covering being intended to cooperate with the surface of the stent and to be in contact therewith, the degree of contact determining the resistance to relative rotation of the ring and the stent, and wherein the engagement means of the stent is left completely uncovered by the covering.
Claim 2
Dependent Claim
128 words
A heart valve prosthesis comprising a stent, obturator means mounted in the stent, and a suture ring which is fitted around the stent, wherein the suture ring has a core with means which engage the stent and can hold the ring and the stent together axially whilst enabling the core of the ring to rotate relative to the stent, and a covering is applied to the core by directly stitching the covering to the core, at least part of said covering being intended to cooperate with the surface of the stent and to be in contact therewith, the degree of contact determining the resistance to relative rotation of the ring and the stent, and wherein the engagement means of the stent is left completely uncovered by the covering.
Claim 3
Dependent Claim
45 words
A prosthesis according to claim 1, wherein the engagement means comprises an annular appendage projecting from an internal surface of the core of the suture ring and the stent has an external groove forming a seat for housing at least part of the annular appendage.
Claim 4
Dependent Claim
31 words
A prosthesis according to claim 2, wherein the width and depth of the annular groove are greater than the corresponding dimensions of at least the said part of the annular appendage.
Claim 5
Dependent Claim
43 words
A prosthesis according to claim 1, wherein the stent is made of a substantially rigid material and the core is made of a resiliently deformable material whereby the suture ring can be mounted on the stent by radial expansion of the suture ring.
Claim 6
Dependent Claim
30 words
A prosthesis according to claim 4, wherein the core fits the stent with slight interference so as to contribute to the resistance to relative rotation of the ring and stent.
Claim 7
Dependent Claim
34 words
A prosthesis according to claim 1, wherein the core and the stent together define at least one annular space in which the covering is inserted in order to contact the surface of the stent.
Claim 8
Dependent Claim
25 words
A prosthesis according to claim 6, wherein the core and the stent form at least two annular spaces at axially opposite ends of the prosthesis.
Claim 9
Dependent Claim
16 words
A prosthesis according to claim 1, wherein the core has a generally T- or omega-shaped cross-section.
Claim 10
Dependent Claim
31 words
A prosthesis according to claim 1 wherein the core fits the stent with slight interference so as to contribute to the resistance to relative rotation of the ring and the stent.
Claim 11
Dependent Claim
30 words
A prosthesis according to claim 9, wherein the slight interference is achieved by virtue of the resilience of the material constituting at least one of the core and the stent.
References Cited (Backward Citations)
US3996623A
Cited
US4197593A
Cited
US4535483A
Cited
DE3507109A1
Cited
US4778461A
Cited
US4863460A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-04-14 | 1995-10-14 | 1996-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-04-14 | 1999-10-14 | 2000-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-04-14 | 2003-10-14 | 2004-04-14 | $7700.00 | Window Closed / Lapsed |