Patent US6053940A successfully refreshed from Google Patents.
US6053940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vascular stent
Assignee: Individual
•
Filing: 1997-10-21
•
Granted: 2000-04-25
•
Expires: 2017-10-21
Abstract
Abstract A flexible stent is provided that has features to minimize recoil and facilitate anchoring of the stent in a vascular passage. The design features sharp angulated bends. Other features include a rounded cross-section in the wire or stent components. Another feature is the bending of the angulated bends in a transverse plane to provide additional rigidity and an anchoring mechanism. Ties are provided in alignment or in staggered fashion, either semi-rigid or flexible, to allow the structure, which can be made of joined rings or a helical arrangement, to be more flexible to accommodate bends in the vascular system. The ties are also disclosed with a locking system involving bending the wire as it is formed into a helix in combination with crossties with loops which lock the stent in an expanded position.
Inventors
- 👤 Bandula Wijay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:22
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/82; A61F2/86; A61F2/90; A61F2/88; A61F2/848; A61F2002/825
Claims Analysis
Total Claims: 37
Claim 1
Independent Claim
108 words
A stent comprising: a radially flexible tubular structure made from a plurality of windings comprising peaks and valleys of a wire-like material about a longitudinal axis; said wire-like material incorporating sharp first bends formed by at least two of segments of said wire-like material approaching each other for substantially their entire length; said segments meeting at a point or becoming parallel to each other immediately before being joined; at least one crosstie extending generally longitudinally to connect at least one of said windings to another of said windings; and said sharp first bends, expanded beyond the original diameter, to resist recoil of the stent toward its original diameter.
Claim 2
Dependent Claim
108 words
A stent comprising: a radially flexible tubular structure made from a plurality of windings comprising peaks and valleys of a wire-like material about a longitudinal axis; said wire-like material incorporating sharp first bends formed by at least two of segments of said wire-like material approaching each other for substantially their entire length; said segments meeting at a point or becoming parallel to each other immediately before being joined; at least one crosstie extending generally longitudinally to connect at least one of said windings to another of said windings; and said sharp first bends, expanded beyond the original diameter, to resist recoil of the stent toward its original diameter.
Claim 3
Dependent Claim
134 words
A stent comprising: a radially flexible tubular structure made from a plurality of windings comprising peaks and valleys of a wire-like material about a longitudinal axis; said wire-like material incorporating sharp first bends formed by at least two of segments of said wire-like material approaching each other for substantially their entire length; said segments meeting at a point or becoming parallel to each other immediately before being joined; at least one crosstie extending generally longitudinally to connect at least one of said windings to another of said windings; said at least one crosstie is formed to be flexible to change its length in response to a bending force applied to said tubular structure; said sharp first bends, when plastically expanded beyond the original diameter, to resist recoil of the stent toward its original diameter.
Claim 4
Dependent Claim
134 words
A stent comprising: a radially flexible tubular structure made from a plurality of windings comprising peaks and valleys of a wire-like material about a longitudinal axis; said wire-like material incorporating sharp first bends formed by at least two of segments of said wire-like material approaching each other for substantially their entire length; said segments meeting at a point or becoming parallel to each other immediately before being joined; at least one crosstie extending generally longitudinally to connect at least one of said windings to another of said windings; said at least one crosstie is formed to be flexible to change its length in response to a bending force applied to said tubular structure; said sharp first bends, when plastically expanded beyond the original diameter, to resist recoil of the stent toward its original diameter.
Claim 5
Dependent Claim
56 words
The stent of claim 1, further comprising: at least one second bend formed adjacent said first bends, said first bends disposing said wire-like material in a first plane while said second bend alters at least one of said sharp first bends out of said first plane and into an intersecting plane where an apex is formed.
Claim 6
Dependent Claim
22 words
The stent of claim 3, wherein said second bend turns said apex outwardly away from the longitudinal axis of said tubular structure.
Claim 7
Dependent Claim
27 words
The stent of claim 4, further comprising a plurality of second bends wherein some of said second bends are in planes not parallel to other second bends.
Claim 8
Dependent Claim
25 words
The stent of claim 1, wherein some of said sharp first bends are oppositely oriented with respect to said sharp first bends on other windings.
Claim 9
Dependent Claim
137 words
A stent comprising: a radially flexible tubular structure made from a plurality of windings comprising peaks and valleys of a wire-like material about a longitudinal axis; said wire-like material incorporating sharp first bends formed by at least two of segments of said wire-like material approaching each other for substantially their entire length; said segments meeting at a point or becoming parallel to each other immediately before being joined; at least one crosstie extending generally longitudinally to connect at least one of said windings to another of said windings; said sharp first bends, expanded beyond the original diameter, to resist recoil of the stent toward its original diameter; and at least some of said sharp first bends are similarly oriented between adjacent windings but are circumferentially out of phase with other sharp first bends on an adjacent winding.
Claim 10
Dependent Claim
137 words
A stent comprising: a radially flexible tubular structure made from a plurality of windings comprising peaks and valleys of a wire-like material about a longitudinal axis; said wire-like material incorporating sharp first bends formed by at least two of segments of said wire-like material approaching each other for substantially their entire length; said segments meeting at a point or becoming parallel to each other immediately before being joined; at least one crosstie extending generally longitudinally to connect at least one of said windings to another of said windings; said sharp first bends, expanded beyond the original diameter, to resist recoil of the stent toward its original diameter; and at least some of said sharp first bends are similarly oriented between adjacent windings but are circumferentially out of phase with other sharp first bends on an adjacent winding.
Claim 11
Dependent Claim
34 words
The stent of claim 1, wherein at least some of said sharp first bends are similarly oriented between adjacent windings but are circumferentially in phase with other sharp first bends on an adjacent winding.
Claim 12
Dependent Claim
31 words
The stent of claim 7, wherein said at least one crosstie is formed to be flexible to change its length in response to a bending force applied to said tubular structure.
Claim 13
Dependent Claim
31 words
The stent of claim 8, wherein said at least one crosstie is formed to be flexible to change its length in response to a bending force applied to said tubular structure.
Claim 14
Dependent Claim
42 words
The stent of claim 7, further comprising a plurality of crossties wherein at least one of said crossfies between a first winding and a second winding is circumferentially misaligned from said crossties which extend between said second winding and a third winding.
Claim 15
Dependent Claim
42 words
The stent of claim 8, further comprising a plurality of crossties wherein at least one of said crossties between a first winding and a second winding is circumferentially misaligned from said crossfies which extend between said second winding and a third winding.
Claim 16
Dependent Claim
51 words
The stent of claim 3, wherein said second bend is disposed on each of said segments prior to said apex, with said sharp first bend defined by said approaching segments up to said second bend, said segments beyond said second bend coming together to define a rounded configuration of said apex.
Claim 17
Dependent Claim
25 words
The stent of claim 13, wherein at least one said second bend turns said apex outwardly away from the longitudinal axis of said tubular structure.
Claim 18
Dependent Claim
21 words
The stent of claim 14, wherein each apex is turned away from said longitudinal axis obliquely to said sharp first bend.
Claim 19
Dependent Claim
21 words
The stent of claim 15, further comprising a plurality of second bends wherein said second bends are disposed in intersecting planes.
Claim 20
Dependent Claim
28 words
The stent of claim 13, wherein said at least one crosstie is flexible to change its length in response to a bending force applied to said tubular structure.
Claim 21
Dependent Claim
35 words
The stent of claim 13, wherein at least some of said sharp first bends are similarly oriented between adjacent windings but are circumferentially out of phase with other sharp first bends on an adjacent winding.
Claim 22
Dependent Claim
34 words
The stent of claim 13, wherein at least some of said sharp first bends are similarly oriented between adjacent windings but are circumferentially in phase with other sharp first bends on an adjacent winding.
Claim 23
Dependent Claim
16 words
The stent of claim 1, wherein said wire-like material has at least a partially rounded cross-section.
Claim 24
Dependent Claim
29 words
The stent of claim 20, wherein said wire-like material is formed of a metal which gives the stent a characteristic of a spring when formed into a tubular structure.
Claim 25
Dependent Claim
25 words
The stent of claim 20, wherein said wire-like material is formed of an annealed metal which must be mechanically expanded for use of the stent.
Claim 26
Dependent Claim
27 words
The stent of claim 1, wherein said tubular structure is formed from discrete rings of said wire-like material, secured to each other by a plurality of crossties.
Claim 27
Dependent Claim
129 words
A stent comprising: a radially flexible tubular structure made from a plurality of windings comprising peaks and valleys of a wire-like material about a longitudinal axis; said wire-like material incorporating sharp first bends formed by at least two of segments of said wire-like material approaching each other for substantially their entire length; said segments meeting at a point or becoming parallel to each other immediately before being joined; at least one crosstie extending generally longitudinally to connect at least one of said windings to another of said windings; said sharp first bends, expanded beyond the original diameter, to resist recoil of the stent toward its original diameter; and said tubular structure is formed from a continuous spirally wound wire-like material where a plurality of said crossfies connect said windings.
Claim 28
Dependent Claim
129 words
A stent comprising: a radially flexible tubular structure made from a plurality of windings comprising peaks and valleys of a wire-like material about a longitudinal axis; said wire-like material incorporating sharp first bends formed by at least two of segments of said wire-like material approaching each other for substantially their entire length; said segments meeting at a point or becoming parallel to each other immediately before being joined; at least one crosstie extending generally longitudinally to connect at least one of said windings to another of said windings; said sharp first bends, expanded beyond the original diameter, to resist recoil of the stent toward its original diameter; and said tubular structure is formed from a continuous spirally wound wire-like material where a plurality of said crossfies connect said windings.
Claim 29
Dependent Claim
27 words
The stent of claim 2, wherein said tubular structure is formed from discrete rings of said wire-like material, secured to each other by a plurality of crossties.
Claim 30
Dependent Claim
29 words
The stent of claim 2, wherein said tubular structure is formed from a continuous spirally wound wire-like material and further comprises a plurality of crossties which connect said windings.
Claim 31
Dependent Claim
27 words
The stent of claim 3, wherein said tubular structure is formed from discrete rings of said wire-like material, secured to each other by a plurality of crossties.
Claim 32
Dependent Claim
29 words
The stent of claim 3, wherein said tubular structure is formed from a continuous spirally wound wire-like material and further comprises a plurality of crossties which connect said windings.
Claim 33
Dependent Claim
71 words
A stent, comprising: a radially flexible tubular structure made from a plurality of windings about a longitudinal axis of an undulating wire-like material, incorporating a plurality of undulations along its length; and at least one crosstie spanning a pair of said windings and forming a loop over said undulations thereby permitting relative unidirectional movement between said loop and differing undulations on at least one of said windings which are thereby engaged.
Claim 34
Dependent Claim
71 words
A stent, comprising: a radially flexible tubular structure made from a plurality of windings about a longitudinal axis of an undulating wire-like material, incorporating a plurality of undulations along its length; and at least one crosstie spanning a pair of said windings and forming a loop over said undulations thereby permitting relative unidirectional movement between said loop and differing undulations on at least one of said windings which are thereby engaged.
Claim 35
Dependent Claim
68 words
The stent of claim 29, wherein: said at least one crosstie is formed having a loop extending around said undulating wire-like material at said end thereof; said plurality of windings are radially expandable, facilitated by said relative movement as said loop allows movement therethrough of said undulating wire-like element, whereupon attaining the desired radial expansion of said windings, said loop is retained between said undulations to minimize recoil.
Claim 36
Dependent Claim
13 words
The stent of claim 30, wherein said undulations are formed with angled bends.
Claim 37
Dependent Claim
13 words
The stent of claim 30, wherein said undulations are formed with rounded bends.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-04-25 | 2003-10-25 | 2004-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-04-25 | 2007-10-25 | 2008-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-04-25 | 2011-10-25 | 2012-04-25 | $7700.00 | Window Closed / Lapsed |