EP1264582A2
Expired / Lapsed
EP
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Medical stent
Assignee: MI Tech Co Ltd
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Filing: 2001-09-25
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Granted: —
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Expires: 2021-09-25
Abstract
Abstract A medical stent includes a first cylindrical body having a first inner diameter and a central axis, a second cylindrical body connected to one end of the first cylindrical body and having a second inner diameter, and a valve assembly for preventing food or fluid from flowing upstream. The valve assembly includes first, second and third valve members that are extended the central axis to an inner circumference wall of the first cylindrical body and spaced away from each other at an angle of 120° in a circumference direction of the first cylindrical body, the first, second and third valve members being provided with first, second and third passages, respectively, and a supporting valve member for connecting lower ends of the first, second and third valve members to an inner circumference wall of the first cylindrical body.
Inventors
- 👤 Hun-Kuk Park
- 👤 Sung-Soon An
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 20:16
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/04; A61F2/24; A61F2/2412; A61F2/2418; A61F2/82; A61L; A61L27/00; A61L27/14; A61M; A61M39/00; A61M39/22; A61F2/86; A61F2/90; A61F2002/044; A61F2210/00; A61F2210/0076; A61F2230/00; A61F2230/0063; A61F2230/0073; A61F2230/0078
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
137 words
A medical stent comprising: a first cylindrical body having a first inner diameter and a central
axis; a second cylindrical body connected to one end of the first
cylindrical body and having a second inner diameter; and a valve assembly for preventing food or fluid from flowing upstream,
the valve assembly comprising: first, second and third valve members that are extended the
central axis to an inner circumference wall of the first cylindrical body and
spaced away from each other at an angle of 120° in a circumference
direction of the first cylindrical body, the first, second and third valve
members being provided with first, second and third passages,
respectively; and a supporting valve member for connecting lower ends of the
first, second and third valve members to an inner circumference wall of the
first cylindrical body.
Claim 2
Dependent Claim
20 words
A medical stent of claim 1 wherein the supporting valve member
is hemispherical, which is concaved toward a lower streamside.
Claim 3
Dependent Claim
78 words
A medical stent of claim 1 wherein each of the first, second and
third valve members comprises two overlapped layers between which the
corresponding passage is defined when the food or fluid flows downstream,
outer ends of the overlapped layers, which are proximal to the inner
circumference wall of the first cylindrical body, being integrally formed with
each other and inner ends of the overlapped layers, which are proximal to
the central axis, being separated from each other.
Claim 4
Dependent Claim
58 words
A medical stent of claim 3 wherein the supporting valve member
comprises first, second and third wings that are identically divided in the
circumference direction on the basis of the central axis, and a
circumference flange interconnecting outer edges of the first, second and
third wings and attached on the inner circumference wall of the first
cylindrical body.
Claim 5
Dependent Claim
29 words
A medical stent of claim 4 wherein each of the first, second and
third wings connects a lower end of the adjacent overlapped layers of the
adjacent valve members.
Claim 6
Dependent Claim
19 words
A medical stent of claim 1 wherein the first and second cylindrical
bodies are covered with a cover member.
Claim 7
Dependent Claim
29 words
A medical stent of claim 6 wherein the cover member is made of
a material selected from the group consisting of silicone-based resin, a
polyurethane-based resin, and polyethylene-based resin.
Claim 8
Dependent Claim
21 words
A medical stent of claim 3 wherein a gas exhaust passage is
defined between the inner ends of the overlapped layers.
Claim 9
Dependent Claim
18 words
A medical stent of claim 1 wherein the first inner diameter is
greater than the second inner diameter.
Claim 10
Dependent Claim
25 words
A medical stent of claim 1 wherein a length of the valve
assembly is identical to or greater than that of the first cylindrical body.
Claim 11
Dependent Claim
42 words
A medical stent of claim 1 further comprising an intermediate
cylindrical body between the first and second cylindrical body, the
intermediate cylindrical body is formed of a material selected from the
group consisting of silicon-based resin, a polyurethane-base resin, and
based-based resin.
References Cited (Backward Citations)
No citation records indexed.
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