GB2056023A
Expired / Lapsed
GB
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Stent for a cardiac valve
Assignee: Hoskin W J
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Filing: 1979-08-06
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Granted: —
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Expires: 1999-08-06
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
GB
Data Source
google_patents
Last Synchronized
2026-10-22 21:09
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/24; A61F2/2412; A61F2/2418; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0013; A61F2230/0017; A61F2230/0023; Y; Y10; Y10S; Y10S623/00; Y10S623/90
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
30 words
A stent for a cardiac valve, the stent comprising a metal base ring having metal legs projecting therefrom in a generally axial direction, each said-leg being flexible (as herein defined).
Claim 2
Dependent Claim
30 words
A stent for a cardiac valve, the stent comprising a metal base ring having metal legs projecting therefrom in a generally axial direction, each said-leg being flexible (as herein defined).
Claim 3
Dependent Claim
56 words
A stent according to claim 1, wherein the flexibility of each leg is such that the radial force applied to the end of the leg remote from said base ring required to move the said end a distance of 1 mm towards the valve axis lies within the range of from 50 g to 150 g.
Claim 4
Dependent Claim
20 words
A stent according to claim 2, wherein said force lies within the range of from 70 g to 90 9.
Claim 5
Dependent Claim
21 words
A stent according to any one of claims 1 to 3, wherein said base ring is substantially rigid (as herein defined).
Claim 6
Dependent Claim
43 words
A stent according to claim 4, wherein the rigidity of the base ring is such that the radial force applied to the base ring required to cause it to move radially inwardly by a distance of 1 mm is at least 200 g.
Claim 7
Dependent Claim
20 words
A stent according to claim 5, wherein said radial force applied to the base ring is at least 210 g.
Claim 8
Dependent Claim
24 words
A stent according to any one of claims 1 to 6, wherein said base metal ring and metal legs are of titanium 6A1 4V.
Claim 9
Dependent Claim
34 words
A stent according to any one of claims 1 to 7, wherein each leg is so shaped that, as it projects from the base ring, it curves inwardly towards the axis of the stent.
Claim 10
Dependent Claim
38 words
A stent according to any one of claims 1 to 8 ' wherein a length of metal smoothly rises and fails around the circumference of the stent, so as to define the outline of each successive metal leg.
Claim 11
Dependent Claim
38 words
A stent according to claim 9, wherein the thickness of said length of metal varies such that it smoothly decreases as it rises away from the base ring and smoothly increases as it fails towards the base ring.
Claim 12
Dependent Claim
52 words
A stent according to claim 9 or claim 10, wherein said length of metal is structurally connected to said metal base ring solely by a connection between the base ring and said length of metal at each of the point of closest approach of said length of metal to said base ring.
Claim 13
Dependent Claim
18 words
A stent according to any one of claims 9 to 11, wherein said length of metal is cloth-encased.
Claim 14
Dependent Claim
20 words
A stent according to any one of claims 1 to 12, wherein the outer periphery of the stent is cloth-covered.
Claim 15
Dependent Claim
24 words
A stent according to any one of claims 1 to 13, including a suture ring around the outer periphery, adjacent to the base ring.
Claim 16
Dependent Claim
25 words
A stent according to any one of claims 1 to 14, wherein the metal assembly comprising said metal base ring and metal legs is monolithic.
Claim 17
Dependent Claim
12 words
A stent according to claim 15, wherein said metal assembly is joint-free.
Claim 18
Dependent Claim
29 words
A stent according to claim 16, wherein said fo metal assembly has been made by a process comprising: producing a blank, and forming said blank into the required shape.
Claim 19
Dependent Claim
17 words
A stent according to claim 17, wherein said blank has been produced from a sheet of metal.
Claim 20
Dependent Claim
17 words
A stent according to claim 17, wherein said blank has been produced from a tube of metal.
Claim 21
Dependent Claim
21 words
A stent according to claim 18, wherein said blank has been produced from said sheet of metal by a photoresist process.
Claim 22
Dependent Claim
20 words
2 1. A stent according to claim 18, wherein said blank has been produced from said sheet of metal bystamping.
Claim 23
Dependent Claim
24 words
A stent according to any one of claims 17 to 19, wherein said blank has been produced from said sheet or tube by cutting.
Claim 24
Dependent Claim
28 words
A stent according to claim 22, wherein said X Z A 1 Y A 1 GB 2 056 023 A 5 cutting has been a spark erosion device.
Claim 25
Dependent Claim
15 words
A stent according to claim 22, wherein said cutting has been by a laser cutter.
Claim 26
Dependent Claim
21 words
A stent according to claim 23 or claim 24, wherein said spark erosion device or laser cutter was computer-controlled during cutting.
Claim 27
Dependent Claim
27 words
A stent according to any one of claims 22 to 25 as dependent on claim 18, wherein a plurality of said blanks has been produced 10 simultaneously.
Claim 28
Dependent Claim
26 words
A stent according to any one of claims 17 to 26, wherein forming said blank has comprised shaping the blank between male and female mold members.
Claim 29
Dependent Claim
34 words
A stent according to any one of claims 17 to 27, wherein said metal assembly is of tatanium 6A1 4V, and the forming of said blank has comprised shaping at a temperature of 950OC+500C.
Claim 30
Dependent Claim
16 words
A stent according to claim 28, wherein said shaping has been performed within an inert atmosphere.
Claim 31
Dependent Claim
70 words
A stent for a cardiac valve, the stent being substantially as described with reference to the accompanying drawings. 3 1. A stent according to any one of claims 1 to 30, whenever fitted with a natural or biomaterial valve. Printed for Her Majestys Stationery Office by the Courier Press, Leamington Spa, 1981. Published by the Patent Office, 25 Southampton Buildings, London, WC2A 1 AY, from which copies may be obtained.
References Cited (Backward Citations)
No citation records indexed.
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