US5876436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotatable cuff assembly for a heart valve prosthesis
Assignee: St Jude Medical LLC
•
Filing: 1997-02-13
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Granted: 1999-03-02
•
Expires: 2017-02-13
Abstract
Abstract The invention provides a sewing cuff assembly for mounting to the body of a heart valve prosthesis. The sewing cuff assembly comprises a resiliently deformed spring for exerting a force directed toward the orifice structure. When a torque is applied to the valve, the force results in a rotation-resisting torque sufficient to resist rotation during normal operation of the valve after implantation but low enough to permit assisted rotation, as during surgery.
Inventors
- 👤 Guy P. Vanney
- 👤 Michael J. Girard
- 👤 William R. Kramlinger
- 👤 Jonas A. Runquist
- 👤 Kimberly A. Anderson
- 👤 Scott D. Moore
- 👤 Bob Allan
- 👤 James E. Graf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:19
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/24; A61F2/2409; Y; Y10; Y10S; Y10S623/00; Y10S623/90
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
217 words
A heart valve prosthesis comprising a generally annular orifice structure having an outer circumference and two circumferential shoulders extending in a radially outward direction from the outer circumference, the heart valve substantially blocking fluid flow through the orifice structure in one direction and permitting fluid flow through the orifice structure in the direction opposite to the first direction, and further including a sewing cuff assembly mounted to the orifice structure, the sewing cuff assembly comprising a resiliently deformed spring extending around the outer circumference of the orifice structure positioned between the two circumferential shoulders and having a shape which is resiliently deformable in a radial direction, the spring for actively and independently exerting a controlled force directed substantially radially inward on a surface of the outer circumference of the orifice structure due to a substantially radially outward deformation in the shape of the spring, the surface causing the deformation of the spring to thereby provide the controlled force which is selected to result in a rotation-resisting torque sufficient to resist rotation during normal operation of the valve after implantation but low enough to permit assisted rotation and wherein the radially inward force causes the resiliently deformed spring to be captured between the two circumferential shoulders which thereby substantially secure the spring from movement in an axial direction.
Claim 2
Dependent Claim
217 words
A heart valve prosthesis comprising a generally annular orifice structure having an outer circumference and two circumferential shoulders extending in a radially outward direction from the outer circumference, the heart valve substantially blocking fluid flow through the orifice structure in one direction and permitting fluid flow through the orifice structure in the direction opposite to the first direction, and further including a sewing cuff assembly mounted to the orifice structure, the sewing cuff assembly comprising a resiliently deformed spring extending around the outer circumference of the orifice structure positioned between the two circumferential shoulders and having a shape which is resiliently deformable in a radial direction, the spring for actively and independently exerting a controlled force directed substantially radially inward on a surface of the outer circumference of the orifice structure due to a substantially radially outward deformation in the shape of the spring, the surface causing the deformation of the spring to thereby provide the controlled force which is selected to result in a rotation-resisting torque sufficient to resist rotation during normal operation of the valve after implantation but low enough to permit assisted rotation and wherein the radially inward force causes the resiliently deformed spring to be captured between the two circumferential shoulders which thereby substantially secure the spring from movement in an axial direction.
Claim 3
Dependent Claim
27 words
The heart valve prosthesis of claim 1 wherein the resiliently deformed spring exerts a controlled inwardly directed radial force on the circumferential surface of the orifice structure.
Claim 4
Dependent Claim
18 words
The heart valve prothesis of claim 1 wherein the resiliently deformed spring exerts a controlled axially directed force.
Claim 5
Dependent Claim
25 words
The heart valve prosthesis of claim 1 wherein the sewing cuff is mounted on the orifice by the force exerted by the resiliently deformed spring.
Claim 6
Dependent Claim
30 words
The heart valve prosthesis of claim 2 wherein the spring exerts the radial force through at least one layer of the fabric which is rotatable relative to the orifice structure.
Claim 7
Dependent Claim
69 words
The heart valve prosthesis of claim 2 wherein the spring is a helical spring oriented substantially coaxially with the circumferential surface of the orifice, the spring comprising at least one revolution, the free inside diameter of the helical spring being smaller than that assumed by the spring when in place over the circumferential surface, resulting in the application of a controlled inwardly directed radial force to the circumferential surface.
Claim 8
Dependent Claim
18 words
The heart valve prosthesis of claim 6 wherein the cross section of the helical spring is substantially rectangular.
Claim 9
Dependent Claim
18 words
The heart valve prosthesis of claim 7 wherein the cross section of the helical spring is substantially square.
Claim 10
Dependent Claim
18 words
The heart valve prosthesis of claim 6 wherein the cross section of the helical spring is substantially round.
Claim 11
Dependent Claim
77 words
The heart valve prosthesis of claim 2 wherein the spring is a substantially annular undulating spring oriented substantially coaxially with the circumferential surface, the spring having transitional sections defining an inside diameter and transitional sections defining an outside diameter, the free inside diameter of the undulating spring being smaller than that assumed by the spring when in place over the circumferential surface, resulting in the application of a controlled inwardly directed radial force to the circumferential surface.
Claim 12
Dependent Claim
14 words
The heart valve prosthesis of claim 10 wherein the transitional sections are relatively pointed.
Claim 13
Dependent Claim
33 words
The heart valve prosthesis of claim 2 wherein the sewing cuff assembly further comprises a ring element to circumferentially constrain the radial expansion of the spring about the entire circumference of the spring.
Claim 14
Dependent Claim
40 words
The heart valve prosthesis of claim 12 wherein the ring element has at least one flange extending radially inwardly to engage a lateral edge of the spring element to limit the lateral movement of the ring element relative to spring.
Claim 15
Dependent Claim
36 words
The heart valve prosthesis of claim 13 wherein the ring element has two radially extending flanges spaced axially to engage the opposed lateral edges of the spring element to maintain the spring element between the flanges.
Claim 16
Dependent Claim
49 words
The heart valve prosthesis of claim 12 wherein the sewing cuff assembly comprises two ring elements, each having a radially extending flange, the rings being oriented and the flanges being spaced to engage the opposed lateral edges of the spring element to maintain the spring element between the flanges.
Claim 17
Dependent Claim
70 words
The heart valve prosthesis of claim 2 wherein the orifice structure further comprises opposed retaining shoulders on each side of the circumferential surface, the inside diameter of the spring being sized relative to the outside diameter of the shoulders such that, once the spring is assembled between the shoulders, the spring must undergo forced radial expansion to be moved out of alignment in the axial direction with the circumferential surface.
Claim 18
Dependent Claim
68 words
The heart valve prosthesis of claim 11 wherein the transitional sections disposed defining the inner diameter of the spring comprise apertures, and the circumferential surface comprises an annular peak, the apertures of the spring being disposed along the peak once the spring is assembled such that the spring ring must undergo forced radial expansion to be moved out of alignment in the axial direction with the circumferential surface.
Claim 19
Dependent Claim
55 words
The heart valve prosthesis of claim 2 further comprising a ring element co-axial with and having an inside diameter larger than the circumferential surface to form an annulus therebetween wherein the spring is resiliently deformed within the annulus, the deformation resulting in the application of a controlled inwardly directed radial force to the circumferential surface.
Claim 20
Dependent Claim
29 words
The heart valve prosthesis of claim 18 wherein the spring is an undulating spring member resiliently constrained in the annulus created between the ring element and the circumferential surface.
Claim 21
Dependent Claim
68 words
The heart valve prosthesis of claim 18 wherein the spring is a helical spring having a diameter substantially smaller than the diameter of the annular surface but greater than the radial dimension of the annulus between the circumferential surface and the ring element and having a length about equal to the circumference of the circumferential surface, the coils of the spring being resiliently deflected into the annular space.
Claim 22
Dependent Claim
23 words
The heart valve prosthesis of claim 2 further comprising a ring element disposed between the spring and the surface of the orifice structure.
References Cited (Backward Citations)
US3099016A
Cited
US3143742A
Cited
US3409013A
Cited
US3491376A
Cited
US3579642A
Cited
US3727240A
Cited
US3628535A
Cited
US3725961A
Cited
US3691567A
Cited
US3763548A
Cited
US3959827A
Cited
US3825957A
Cited
US3859668A
Cited
US3781969A
Cited
US3828787A
Cited
US3800403A
Cited
US3839741A
Cited
US3996623A
Cited
US4078268A
Cited
US3997923A
Cited
US4276658A
Cited
US4197593A
Cited
US4233690A
Cited
US4240161A
Cited
USRE30507E
Cited
US4328592A
Cited
US4865600A
Cited
US4599081A
Cited
US4680031A
Cited
US4535483A
Cited
US4705516A
Cited
US4665906A
Cited
US4890944A
Cited
US4666442A
Cited
US4655462A
Cited
US4576605A
Cited
US4683883A
Cited
US4743253A
Cited
US4863460A
Cited
US4790843A
Cited
US4876781A
Cited
US4826144A
Cited
US4915366A
Cited
US5117066A
Cited
US5108078A
Cited
US4982727A
Cited
US5072070A
Cited
US5079388A
Cited
US5104406A
Cited
US5035709A
Cited
US5197980A
Cited
US5071431A
Cited
US5163955A
Cited
US5354330A
Cited
US5178633A
Cited
US5236450A
Cited
US5403305A
Cited
US5584879A
Cited
US5443502A
Cited
US5480425A
Cited
US5582607A
Cited
US5607470A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-03-01 | 2002-08-31 | 2003-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-03-01 | 2006-08-31 | 2007-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-03-01 | 2010-08-31 | 2011-03-02 | $7700.00 | Window Closed / Lapsed |