US3631848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extensible catheter
Assignee: United States Catheter and Instrument Corp
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Filing: 1968-09-04
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Granted: 1972-01-04
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Expires: 1988-09-04
Abstract
Abstract A flexible cardiac or vascular catheter provided at its distal end with a smaller extensible and retractable flexible tubular extension particularly adapted to reach normally inaccessible treatment locations in vessels or branches thereof, the extension being movable axially of the catheter by means of a control wire the proximal end of which projects from the proximal end of the catheter.
Inventors
- 👤 Wolf F Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:22
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0067; A61M25/0068; A61M25/0021; A61M25/01; A61M25/09; A61M25/0905; A61M25/0074
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
175 words
A flexible catheter having a lumen extending its full length, the diameter of the lumen being reduced adjacent its distal end to form a proximally facing annular shoulder, a flexible tubular extension having an outside diameter permitting free axial sliding movement through said reduced diameter lumen, said extension being enlarged adjacent its proximal end to form a distally facing shoulder engageable with the first named shoulder to limit movement of the extension distally with respect to said catheter, the length of said extension from its distal end to its enlarged shoulder being greater than the distance from the distal end of the catheter to the annular shoulder in said lumen filamentary means extending from said tubular extension to and beyond the proximal end of the catheter for effecting sliding movement of said tubular extension relative to said catheter, and a coupling connecting the proximal end of said extension to the distal end of said filamentary means, the lumen of the extension being in communication with the lumen of the catheter proximally of both said shoulders.
Claim 2
Dependent Claim
175 words
A flexible catheter having a lumen extending its full length, the diameter of the lumen being reduced adjacent its distal end to form a proximally facing annular shoulder, a flexible tubular extension having an outside diameter permitting free axial sliding movement through said reduced diameter lumen, said extension being enlarged adjacent its proximal end to form a distally facing shoulder engageable with the first named shoulder to limit movement of the extension distally with respect to said catheter, the length of said extension from its distal end to its enlarged shoulder being greater than the distance from the distal end of the catheter to the annular shoulder in said lumen filamentary means extending from said tubular extension to and beyond the proximal end of the catheter for effecting sliding movement of said tubular extension relative to said catheter, and a coupling connecting the proximal end of said extension to the distal end of said filamentary means, the lumen of the extension being in communication with the lumen of the catheter proximally of both said shoulders.
Claim 3
Dependent Claim
31 words
The catheter of claim 1 in which said filamentary means is a wire carried within said lumen and having its distal end connected to the proximal end of said tubular extension.
Claim 4
Dependent Claim
75 words
The catheter of claim 1 in which a rigid internal tip is positioned within the distal end of said lumen and provided with a tube-directing passageway, said coupling for said filamentary means having its distal end connected to the proximal end of said tubular extension and its proximal end Swivel- connected to said means, and in which said means is a wire carried within said lumen and having its distal end swivel-connected to said connector.
Claim 5
Dependent Claim
12 words
The catheter of claim 1 in which said tubular extension is radiopaque.
Claim 6
Dependent Claim
21 words
The catheter of claim 1 in which the first and second shoulders are shaped to form, when engaged, a fluidtight seal.
Claim 7
Dependent Claim
50 words
The catheter of claim 1 in which the catheter is provided, adjacent its distal end with a laterally directed opening from its reduced diameter portion and with associated means for guiding the tubular extension into and through said opening when the extension is moved distally with respect to the catheter.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-03 | 1975-07-05 | 1976-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-03 | 1979-07-05 | 1980-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-03 | 1983-07-05 | 1984-01-04 | $7700.00 | Window Closed / Lapsed |