US6241757B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stent for expanding body's lumen
Assignee: STENTECH Inc
•
Filing: 1998-02-03
•
Granted: 2001-06-05
•
Expires: 2018-02-03
Abstract
Abstract A stent for expanding a lumen of a body having a structural stability along the length of the stent, as well as a good expandable force. According to one embodiment of the present invention, the stent is made of a single length of a filament and includes zigzag sections, in which the filament is wound in a zigzag manner, disposed on both end portions of the stent; and a spiral section, in which the filament is wound in a spiral manner, disposed between the zigzag sections. The zigzag section includes a plurality of bands. Each of the bands includes a series of straight portions, peak portions, and valley portions, the peak and valley portions being integrally engaged with the straight portions, and each of the bands is disposed along a circumferential direction of the stent on a plane substantially perpendicular to a longitudinal axis thereof; and each valley portion of the bands is twisted with a peak portion of an adjacent band. Also, the spiral section includes a body portion formed in such a way that the filament crosses in a spiral pattern to form a plurality of segments with the filament being not engaged with each other, and upper and lower end portions having a plurality of bent points.
Inventors
- 👤 Sung Soon An
- 👤 Chel Seng Kim
- 👤 Sung Pil Choi
- 👤 Tae Hyung Kim
- 👤 Ho Young Song
- 👤 Sang Woo Song
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:49
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/82; A61F2/86; A61F2/90; D; D04; D04C; D04C1/00; D04C1/06; D04C1/08; D04G; D04G1/00; D04G1/02; D04G1/06; A61F2/0077; A61F2/02; A61F2/04; A61F2/06; A61F2/07; A61F2/848; A61F2002/8486; A61F2/95; A61F2002/9528; A61F2230/00; A61F2230/0002; A61F2230/0028; A61F2230/0054; A61F2230/0063; A61F2230/0073; A61F2230/0078; D10; D10B; D10B2509/00; D10B2509/06
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
131 words
A stent for expanding a lumen of a body, the stent being made up of a single length of a filament and including a plurality of bands formed in a zigzag pattern, wherein: each of the bands includes a series of straight portions, peak portions, and valley portions, the peak and valley portions being integrally engaged with the straight portions, and each of the bands being disposed along a circumferential direction of the stent on a plane substantially perpendicular to a longitudinal axis of the stent; each peak portion that is adjacent to another band being twisted with a respective valley portion of the other band; and an initial portion of each band other than an initial band being an extension from a last straight portion of a previous adjacent band.
Claim 2
Dependent Claim
131 words
A stent for expanding a lumen of a body, the stent being made up of a single length of a filament and including a plurality of bands formed in a zigzag pattern, wherein: each of the bands includes a series of straight portions, peak portions, and valley portions, the peak and valley portions being integrally engaged with the straight portions, and each of the bands being disposed along a circumferential direction of the stent on a plane substantially perpendicular to a longitudinal axis of the stent; each peak portion that is adjacent to another band being twisted with a respective valley portion of the other band; and an initial portion of each band other than an initial band being an extension from a last straight portion of a previous adjacent band.
Claim 3
Dependent Claim
41 words
The stent as claimed in claim 1 , wherein upper and lower end portions of the stent have a flare shape in which a diameter is increased toward a distal end thereof to prevent the stent from migrating inside the lumen.
Claim 4
Dependent Claim
29 words
The stent as claimed in claim 1 , wherein the upper and lower end portions of the stent have a larger diameter than a middle portion of the stent.
Claim 5
Dependent Claim
17 words
The stent as claimed in claim 1 , wherein the filament is made of a Ni—Ti alloy.
Claim 6
Dependent Claim
19 words
The stent as claimed in claim 1 , wherein the stent is covered or wrapped with a flexible material.
Claim 7
Dependent Claim
26 words
The stent as claimed in claim 1 , further comprising on one end thereof a retrieving member by which the stent is removed from the lumen.
Claim 8
Dependent Claim
25 words
The stent as claimed in claim 6 , wherein the retrieving member comprises a plurality of wires attached to the one end of the stent.
Claim 9
Dependent Claim
26 words
The stent as claimed in claim 1 wherein said each peak portion is twisted at least once around the respective valley portion of the other band.
Claim 10
Dependent Claim
24 words
The stent as claimed in claim 1 wherein said each peak portion is twisted with a single respective valley portion of the other band.
Claim 11
Dependent Claim
129 words
A stent for expanding a lumen of a body, the stent being made of a single length of a filament, the stent comprising: a body portion formed in such a way that the filament crosses in a spiral pattern to form a plurality of segments with the segments being not engaged with each other; and upper and lower end portions having a plurality of bent points; wherein the number of the bent points of the upper end portion is equal with the number of the bent points of the lower end portion, and any one segment passes alternately on and under other segments which are wound along a longitudinal axis of the stent in a spiral direction so that cross points of the segments form a plurality of meshes.
Claim 12
Dependent Claim
129 words
A stent for expanding a lumen of a body, the stent being made of a single length of a filament, the stent comprising: a body portion formed in such a way that the filament crosses in a spiral pattern to form a plurality of segments with the segments being not engaged with each other; and upper and lower end portions having a plurality of bent points; wherein the number of the bent points of the upper end portion is equal with the number of the bent points of the lower end portion, and any one segment passes alternately on and under other segments which are wound along a longitudinal axis of the stent in a spiral direction so that cross points of the segments form a plurality of meshes.
Claim 13
Dependent Claim
42 words
The stent as claimed in claim 10 , wherein the upper and lower end portions of the stent have a flare shape in which a diameter is increased toward a distal end thereof to prevent the stent from migrating inside the lumen.
Claim 14
Dependent Claim
29 words
The stent as claimed in claim 10 , wherein the upper and lower end portions of the stent have a larger diameter than a middle portion of the stent.
Claim 15
Dependent Claim
17 words
The stent as claimed in claim 10 , wherein the filament is made of a Ni—Ti alloy.
Claim 16
Dependent Claim
19 words
The stent as claimed in claim 10 , wherein the stent is covered or wrapped with a flexible material.
Claim 17
Dependent Claim
25 words
The stent as claimed in claim 10 , further comprising on one end a retrieving member by which the stent is removed from the lumen.
Claim 18
Dependent Claim
25 words
The stent as claimed in claim 15 , wherein the retrieving member comprises a plurality of wires attached to the one end of the stent.
Claim 19
Dependent Claim
97 words
A stent for expanding a lumen of a body, the stent being made from a single length of filament, the stent comprising: zigzag sections, in which the filament is wound in a zigzag manner, disposed on both end portions of the stent, each of the zigzag sections including a plurality of bands, each of the bands including alternate peaks and valleys, each peak of one band being twisted together with a single respective valley of an adjacent band; and a spiral section, in which the filament is wound in a spiral manner, disposed between the zigzag sections.
Claim 20
Dependent Claim
97 words
A stent for expanding a lumen of a body, the stent being made from a single length of filament, the stent comprising: zigzag sections, in which the filament is wound in a zigzag manner, disposed on both end portions of the stent, each of the zigzag sections including a plurality of bands, each of the bands including alternate peaks and valleys, each peak of one band being twisted together with a single respective valley of an adjacent band; and a spiral section, in which the filament is wound in a spiral manner, disposed between the zigzag sections.
Claim 21
Dependent Claim
138 words
A stent for expanding a lumen of a body, the stent being made of a single length of filament, the stent comprising: zigzag sections, in which the filament is wound in a zigzag manner, disposed on both end portions of the stent, each of the zigzag sections including a plurality of bands, each of the bands including a series of straight portions, peak portions, and valley portions, the peak and valley portions being integrally engaged with the straight portions, each of the bands being disposed along a circumferential direction of the stent on a plane substantially perpendicular to a longitudinal axis thereof, and each valley portion of the bands being twisted with a peak portion of an adjacent band; and a spiral section, in which the filament is wound in a spiral manner, disposed between the zigzag sections.
Claim 22
Dependent Claim
138 words
A stent for expanding a lumen of a body, the stent being made of a single length of filament, the stent comprising: zigzag sections, in which the filament is wound in a zigzag manner, disposed on both end portions of the stent, each of the zigzag sections including a plurality of bands, each of the bands including a series of straight portions, peak portions, and valley portions, the peak and valley portions being integrally engaged with the straight portions, each of the bands being disposed along a circumferential direction of the stent on a plane substantially perpendicular to a longitudinal axis thereof, and each valley portion of the bands being twisted with a peak portion of an adjacent band; and a spiral section, in which the filament is wound in a spiral manner, disposed between the zigzag sections.
Claim 23
Dependent Claim
100 words
A stent for expanding a lumen of a body, the stent being made of a single length of filament, the stent comprising: zigzag sections, in which the filament is wound in a zigzag manner, disposed on both end portions of the stent; and a spiral section, in which the filament is wound in a spiral manner, disposed between the zigzag sections, the spiral section including, a body portion formed in such a way that the filament crosses in a spiral pattern to form a plurality of unengaged segments, and upper and lower end portions having a plurality of bent points.
Claim 24
Dependent Claim
100 words
A stent for expanding a lumen of a body, the stent being made of a single length of filament, the stent comprising: zigzag sections, in which the filament is wound in a zigzag manner, disposed on both end portions of the stent; and a spiral section, in which the filament is wound in a spiral manner, disposed between the zigzag sections, the spiral section including, a body portion formed in such a way that the filament crosses in a spiral pattern to form a plurality of unengaged segments, and upper and lower end portions having a plurality of bent points.
Claim 25
Dependent Claim
46 words
A stent for expanding a lumen of a body, comprising: bands constructed from a single length of a filament; each of the bands including alternate peaks and valleys; and each peak of one band being twisted together with a single respective valley of an adjacent band.
Claim 26
Dependent Claim
46 words
A stent for expanding a lumen of a body, comprising: bands constructed from a single length of a filament; each of the bands including alternate peaks and valleys; and each peak of one band being twisted together with a single respective valley of an adjacent band.
Claim 27
Dependent Claim
10 words
The stent of claim 20 wherein the bands are cylindrical.
Claim 28
Dependent Claim
26 words
The stent of claim 20 wherein each of the bands includes straight portions of the filament respectively disposed between each peak and each respective adjacent valley.
Claim 29
Dependent Claim
18 words
The stent of claim 20 wherein each of the valleys comprises a respective straight portion of the filament.
Claim 30
Dependent Claim
25 words
The stent of claim 20 wherein each peak of one band is twisted at least once around the single respective valley of the adjacent band.
Claim 31
Dependent Claim
80 words
The stent of claim 20 , further comprising: a mid portion having first and second opposite sides; a first end portion connected to the first side of the mid portion; a second end portion connected to the second side of the mid portion; wherein the bands are cylindrical and have respective diameters; and wherein bands that compose the first and second end portions have respective diameters that are larger than the diameter of a band that composes the mid portion.
Claim 32
Dependent Claim
22 words
The stent as claimed in claim 17 , further comprising a zigzag section formed in a middle portion of the spiral section.
Claim 33
Dependent Claim
39 words
The stent as claimed in claim 17 , wherein the end portions of the stent have a flare shape in which a diameter is increased toward a distal end thereof to prevent the stent from migrating inside the lumen.
Claim 34
Dependent Claim
26 words
The stent as claimed in claim 17 , wherein the end portions of the stent have a larger diameter than a middle portion of the stent.
Claim 35
Dependent Claim
17 words
The stent as claimed in claim 17 , wherein the filament is made of a Ni—Ti alloy.
Claim 36
Dependent Claim
19 words
The stent as claimed in claim 17 , wherein the stent is covered or wrapped with a flexible material.
Claim 37
Dependent Claim
25 words
The stent as claimed in claim 17 , further comprising on one end a retrieving member by which the stent is removed from the lumen.
Claim 38
Dependent Claim
25 words
The stent as claimed in claim 24 , wherein the retrieving member comprises a plurality of wires attached to the one end of the stent.
References Cited (Backward Citations)
US4214587A
Cited
US4655771B1
Cited
US4655771A
Cited
US4580568A
Cited
WO1992006734A1
Cited
US5330500A
Cited
US5876445A
Cited
WO1993013825A1
Cited
US5366504A
Cited
US5545211A
Cited
US5782904A
Cited
US5948018A
Cited
US5919225A
Cited
US5833707A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-06-04 | 2004-12-04 | 2005-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-06-04 | 2008-12-04 | 2009-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-06-04 | 2012-12-04 | 2013-06-05 | $7700.00 | Window Closed / Lapsed |