Patent US3462892A successfully refreshed from Google Patents.
US5042976A
Expired / Lapsed
US
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Balloon catheter and manufacturing method of the same
Assignee: Terumo Corp
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Filing: 1988-01-12
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Granted: 1991-08-27
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Expires: 2008-01-12
Abstract
Abstract A balloon catheter is provided, which comprises a catheter body made of a flexible tube provided with at least one inner channel and with an annular groove formed on an outer surface near the distal end portion of the tube, and a balloon covering the annular groove in such a manner that the outer diameter of the balloon is equal to or smaller than a maximum diameter of the distal end portion of the tube, the balloon being expanded or shrunk through another inner channel. A method of manufacturing the balloon catheter which comprises the steps of reducnig an outer diameter of a distal end portion of the catheter body while keeping a desired inner channel undamaged, mounting a tubular heat-resistant member to a prospective balloon mounting portion of the reduced diameter portion, molding a reduced diameter portion extruded from the heat-resistant member into a spherical shape, and mounting an inflatable balloon to the balloon mounting portion after removing the heat-resistant member.
Inventors
- 👤 Yoshio Ishitsu
- 👤 Kouji Tsuchida
- 👤 Shigekazu Sekii
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:08
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/10; A61M25/1027; A61M25/1034; A61M25/1002; A61M2025/1043; A61M2025/1065
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
216 words
A balloon catheter comprising: a catheter body formed as a single member and made of a flexible tube provided with at least one inner channel with an opening at a distal end portion thereof, the catheter body being provided with an annular groove formed on an outer surface of the tube and including a distal wall adjacent to the distal end portion, a proximal wall, and a bottom portion extending a predetermined length along an axial direction of the tube between said distal and proximal walls, and with a balloon inflation inner channel open to said bottom portion of the annular groove; and a balloon secured to the catheter body for covering the bottom portion of the annular groove, the balloon being arranged in the annular groove such that an outer surface of a distal end portion of the balloon is contacted with, and is secured by a binding means to, the bottom portion of the annular groove adjacent said distal wall, with the rest of the balloon being everted over said binding means, with the proximal end of the balloon secured near the proximal wall, with the entire outer diameter of the balloon in its deflated state being equal to or smaller than a maximum outer diameter of the distal end portion of the tube.
Claim 2
Dependent Claim
216 words
A balloon catheter comprising: a catheter body formed as a single member and made of a flexible tube provided with at least one inner channel with an opening at a distal end portion thereof, the catheter body being provided with an annular groove formed on an outer surface of the tube and including a distal wall adjacent to the distal end portion, a proximal wall, and a bottom portion extending a predetermined length along an axial direction of the tube between said distal and proximal walls, and with a balloon inflation inner channel open to said bottom portion of the annular groove; and a balloon secured to the catheter body for covering the bottom portion of the annular groove, the balloon being arranged in the annular groove such that an outer surface of a distal end portion of the balloon is contacted with, and is secured by a binding means to, the bottom portion of the annular groove adjacent said distal wall, with the rest of the balloon being everted over said binding means, with the proximal end of the balloon secured near the proximal wall, with the entire outer diameter of the balloon in its deflated state being equal to or smaller than a maximum outer diameter of the distal end portion of the tube.
Claim 3
Dependent Claim
19 words
A catheter according to claim 1, wherein an outer edge of said distal wall is a smooth curved surface.
Claim 4
Dependent Claim
19 words
A catheter according to claim 1, wherein the distal end portion has a smooth curved surface or is flat.
Claim 5
Dependent Claim
50 words
A catheter according to claim 1, wherein a cylindrical reinforcing member having an inner passage is coaxially inserted in a portion of the at least one inner channel over which the balloon is mounted, said inner passage being in communication with other portions of the at least one inner channel.
Claim 6
Dependent Claim
34 words
A catheter according to claim 4, wherein said reinforcing member has substantially the same inner diameter as that of the at least one inner channel and is connected thereto through a substantially smooth surface.
Claim 7
Dependent Claim
18 words
A catheter according to claim 4, wherein the reinforcing member is made of a heat-resistant hard plastic material.
Claim 8
Dependent Claim
15 words
A catheter according to claim 4, wherein the reinforcing member is made of a metal.
Claim 9
Dependent Claim
14 words
A catheter according to claim 4, wherein the reinforcing member is made of ceramics.
Claim 10
Dependent Claim
33 words
A balloon catheter according to claim 1, wherein the outer diameter of the balloon in its deflated state is equal to a maximum outer diameter of the distal end portion of the tube.
Claim 11
Dependent Claim
17 words
A balloon catheter according to claim 1, wherein said binding means is a winding of a string.
Claim 12
Dependent Claim
14 words
A balloon catheter according to claim 1, wherein said binding means is an adhesive.
Claim 13
Dependent Claim
37 words
A balloon catheter according to claim 4, wherein said cylindrical reinforcing member has a length extending from the distal end portion of the balloon to a proximal end portion of the balloon secured to the annular groove.
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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) | 1994-08-26 | 1995-02-25 | 1995-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-26 | 1999-02-25 | 1999-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-26 | 2003-02-25 | 2003-08-27 | $7700.00 | Window Closed / Lapsed |