US5800527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Support housing for valve and closure members, in particular for heart valve prostheses
Assignee: Adiam Life Science AG
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Filing: 1993-07-09
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Granted: 1998-09-01
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Expires: 2013-07-09
Abstract
Abstract A support housing (1) for valve and closure members, in particular for heart valve prostheses, has a base ring (2) which carries at least two symmetrically offset posts (4/5) substantially oriented in the direction of the ring axis and linked together by curved strips (3) for securing at least two flexible webs (6/7). In order to produce with such a support housing a valve or closure member, in particular a heart valve prosthesis, which operates reliably even with different closing pressure differentials, i.e. in particular even under varying physiological stress conditions, the stent (1) is only retained in sections and with limited flexibility. For that purpose the free ends (4) of the posts have a rigid form, and/or the bases of the posts have a flexibility limited by stops, and/or the strips (3) have a flexibility limited by stops.
Inventors
- 👤 Josef Jansen
- 👤 Ulrich Jansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:58
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/24; A61F2/2412; A61F2/2409; A61F2/2418; A61F2250/00; A61F2250/0014; A61F2250/0036; Y; Y10; Y10S; Y10S623/00; Y10S623/90
Claims Analysis
Total Claims: 42
Claim 1
Independent Claim
120 words
A support stent for valve and closure members, said stent comprising a base ring, at least two posts mounted on said base ring, said posts extending substantially axially to the direction of a ring axis, said posts having free ends and bases, said bases linked together by curved strips and said posts and said strips having backing surfaces for securing at least two flexible webs thereto, said posts and said strips having outer surfaces and inner surfaces that respectively form outer and inner walls of said stent, said posts being inwardly and outwardly deflectable relative to said base ring with said free ends of said posts being rigid, and stop means for limiting inward and outward deflection of said posts.
Claim 2
Dependent Claim
120 words
A support stent for valve and closure members, said stent comprising a base ring, at least two posts mounted on said base ring, said posts extending substantially axially to the direction of a ring axis, said posts having free ends and bases, said bases linked together by curved strips and said posts and said strips having backing surfaces for securing at least two flexible webs thereto, said posts and said strips having outer surfaces and inner surfaces that respectively form outer and inner walls of said stent, said posts being inwardly and outwardly deflectable relative to said base ring with said free ends of said posts being rigid, and stop means for limiting inward and outward deflection of said posts.
Claim 3
Dependent Claim
16 words
A stent according to claim 1, wherein said stop means is adjacent to said base ring.
Claim 4
Dependent Claim
19 words
A support stent according to claim 1 wherein, said posts having a prismatic inner overlay on said free ends.
Claim 5
Dependent Claim
38 words
A stent according to claim 3, wherein said inner overlay has a triangular cross-section tapering concavely on both sides, said overlay being in the form of a prism tapering to a point towards said base of said posts.
Claim 6
Dependent Claim
60 words
A stent according to claim 4, wherein said posts have a trapezium cross-section with a shorter side, and a longer side opposite said shorter side, said shorter side of the trapezium being located axially outward of said longer side, said inner overlay adjoining the longer side of the trapezium, said triangular cross-section of said overlay having an apex pointing inward.
Claim 7
Dependent Claim
73 words
A stent according to claim 3, wherein said inner overlay tapers in cross-section from said backing surfaces, said overlay tapering at first triangularly or convexly on both sides and then triangularly or concavely on both sides, so that said web gradually deviates with small bending angles when it is closed, and is in addition supported by said inner overlay, said inner overlay tapering into the stent wall toward said bases of said posts.
Claim 8
Dependent Claim
17 words
A stent according to claim 3, wherein said posts are formed integrally with their respective inner overlays.
Claim 9
Dependent Claim
31 words
A stent according to claim 3, wherein said backing surfaces of said posts and said strips adjoin said outer wall of said stent forming an edge, said edge is rounded off.
Claim 10
Dependent Claim
41 words
A stent according to claim 3, wherein said backing surfaces of said strips and of said posts are singly curved between said inner and outer walls of said stent, said backing surfaces being inclined toward said outer wall of said stent.
Claim 11
Dependent Claim
48 words
A stent according to claim 3, wherein said bases of said posts have apertures, such that said posts and said strips connect to form a crown shape, said strips arching toward said base ring, said crown shape being connected to said base ring only by way of stays.
Claim 12
Dependent Claim
20 words
A stent according to claim 10, wherein said stay is vertical, said stay located under the base of each post.
Claim 13
Dependent Claim
46 words
A stent according to claim 10, wherein said stays are in the form of a V under the base of each post, each said post being connected to said base ring by way of two respective stays for the greatest possible flexibility with minimal pressure differentials.
Claim 14
Dependent Claim
22 words
A stent according to claim 3, wherein said stop means includes a coaxial stop ring in the region of said base ring.
Claim 15
Dependent Claim
18 words
A stent according to claim 13, wherein said stop ring and said base ring are integrally connected together.
Claim 16
Dependent Claim
14 words
A stent according to claim 13, wherein said stop ring has a circumferential groove.
Claim 17
Dependent Claim
49 words
A stent according to claim 15, wherein said outside wall of said stent has at least one at least partially circumferential lip, said lip located generally on said base of said post, said lip engaging said groove in said stop ring, said lip remaining freely movable within said groove.
Claim 18
Dependent Claim
67 words
A stent according to claim 16, wherein said bases of said posts have apertures, such that said posts and said strips connect to form a crown shape, said strips arching toward said base ring, said crown being connected to said base ring only by way of stays, said lip or lips provided on the outer wall of said stent, said lip or lips located on said stays.
Claim 19
Dependent Claim
42 words
A stent according to claim 13, wherein said curved strips and/or said stop ring have at least one at least partially circumferential recess, said recess or recesses associated in such a way that said ring serves as a stop for said strips.
Claim 20
Dependent Claim
13 words
A stent according to claim 3, wherein said stent has a diffuser shape.
Claim 21
Dependent Claim
38 words
A stent according to claim 19, wherein said stent has a conical shape opening toward said ends of said posts with cone angles between 20 and 140, the contraction of said stent into a cylindrical configuration being limited.
Claim 22
Dependent Claim
31 words
A stent according to claim 20, wherein the limit of the contractibility of the stent posts into the cylindrical configuration is reached at pressure differentials between 2 and 30 mm Hg.
Claim 23
Dependent Claim
30 words
A stent according to claim 3, wherein said webs having an arcuate rim, said rim having a triangular shaped edge, said edge engaging a corresponding recess in said backing surface.
Claim 24
Dependent Claim
26 words
A stent according to claim 3, wherein said webs having an arcuate, circumferential snap rim, said snap rim conforming with the outer surface of said stent.
Claim 25
Dependent Claim
32 words
A stent according to claim 1, wherein said backing surfaces of said posts and said strips adjoin said outer wall of said stent forming an edge and said edge is rounded off.
Claim 26
Dependent Claim
41 words
A stent according to claim 1, wherein said backing surfaces of said strips and of said posts are singly curved between said inner and outer walls of said stent, said backing surfaces being inclined toward said outer wall of said stent.
Claim 27
Dependent Claim
48 words
A stent according to claim 1, wherein said bases of said posts have apertures, such that said posts and said strips connect to form a crown shape, said strips arching toward said base ring, said crown shape being connected to said base ring only by way of stays.
Claim 28
Dependent Claim
20 words
A stent according to claim 26, wherein said stay is vertical, said stay located under the base of each post.
Claim 29
Dependent Claim
46 words
A stent according to claim 26, wherein said stays are in the form of a V under the base of each post, each said post being connected to said base ring by way of two respective stays for the greatest possible flexibility with minimal pressure differentials.
Claim 30
Dependent Claim
22 words
A stent according to claim 1 wherein, said stop means includes a coaxial stop ring in the region of said base ring.
Claim 31
Dependent Claim
18 words
A stent according to claim 29, wherein said stop ring and said base ring are integrally connected together.
Claim 32
Dependent Claim
14 words
A stent according to claim 29, wherein said stop ring has a circumferential groove.
Claim 33
Dependent Claim
49 words
A stent according to claim 31, wherein said outside wall of said stent has at least one at least partially circumferential lip, said lip located generally on said base of said post, said lip engaging said groove in said stop ring, said lip remaining freely movable within said groove.
Claim 34
Dependent Claim
68 words
A stent according to claim 32, wherein said bases of said posts have apertures, such that said posts and said strips connect to form a crown shape, said strips arching toward said base ring, said crown shape being connected to said base ring only by way of stays, said lip or lips provided on the outer wall of said stent, said lip or lips located on said stays.
Claim 35
Dependent Claim
42 words
A stent according to claim 29, wherein said curved strips and/or said stop ring have at least one at least partially circumferential recess, said recess or recesses associated in such a way that said ring serves as a stop for said strips.
Claim 36
Dependent Claim
13 words
A stent according to claim 1, wherein said stent has a diffuser shape.
Claim 37
Dependent Claim
38 words
A stent according to claim 35, wherein said stent has a conical shape opening toward said ends of said posts with cone angles between 2° and 14°, the contraction of said stent into a cylindrical configuration being limited.
Claim 38
Dependent Claim
31 words
A stent according to claim 36, wherein the limit of the contractibility of the stent posts into the cylindrical configuration is reached at pressure differentials between 2 and 30 mm Hg.
Claim 39
Dependent Claim
30 words
A stent according to claim 1, wherein said webs having an arcuate rim, said rim having a triangular shaped edge, said edge engaging a corresponding recess in said backing surface.
Claim 40
Dependent Claim
26 words
A stent according to claim 1, wherein said webs having an arcuate, circumferential snap rim, said snap rim conforming with the outer surface of said stent.
Claim 41
Dependent Claim
31 words
A stent according to claim 1, wherein said backing surfaces of said posts and said strips adjoin said outer wall of said stent forming an edge, said edge is rounded off.
Claim 42
Dependent Claim
41 words
A stent according to claim 1, wherein said backing surfaces of said strips and of said posts are singly curved between said inner and outer walls of said stent, said backing surfaces being inclined toward said outer wall of said stent.
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) | 2001-08-31 | 2002-03-02 | 2002-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-08-31 | 2006-03-02 | 2006-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-08-31 | 2010-03-02 | 2010-09-01 | $7700.00 | Window Closed / Lapsed |