US3896815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expansible tip catheters
Assignee: Livanova Holding USA Inc
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Filing: 1974-06-06
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Granted: 1975-07-29
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Expires: 1994-06-06
Abstract
Abstract Expansible tip catheters in which the distal portion of a single lumen flexible plastic catheter tube is manufactured with a physical characteristic such that when fluid under pressure is introduced therein the wall of this distal portion begins to expand outwardly, and additional fluid pressure causes the wall to expand both outwardly and also along the longitudinal catheter axis.
Inventors
- 👤 Bruce E Fettel
- 👤 Samuel Burd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:28
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0067; A61M25/0074; A61B; A61B17/00; A61B17/22; A61B17/22031; A61B17/22032; A61M25/0068; A61M25/0069
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
178 words
In an expansible tip embolectomy catheter of the type which is so constructed and arranged as to be inserted distal end first into blood passages in the body which comprise an elongate flexible tube sealed at the distal end and connected at the proximal end to a pressurized fluid source connector for supplying fluid under pressure into said tube during use, the improvement wherein: said tube has an outside diameter from about 0.026 inches to about 0.092 inches; an elongate portion of the tube adjacent the distal end is prestretched to be less resistant to lateral expansion than the remainder of the tube such that upon injection of fluid under pressure into said tube said elongate distal end portion expands laterally first, said lateral expansion beginning initially in and progressing along said elongate diStal end portion in preference to lateral expansion of the remainder of said tube; and including an elongate flexible wire secured to the connector and the distal end of the tube, extending through the tube to prevent extension and to guide the tube during insertion.
Claim 2
Dependent Claim
178 words
In an expansible tip embolectomy catheter of the type which is so constructed and arranged as to be inserted distal end first into blood passages in the body which comprise an elongate flexible tube sealed at the distal end and connected at the proximal end to a pressurized fluid source connector for supplying fluid under pressure into said tube during use, the improvement wherein: said tube has an outside diameter from about 0.026 inches to about 0.092 inches; an elongate portion of the tube adjacent the distal end is prestretched to be less resistant to lateral expansion than the remainder of the tube such that upon injection of fluid under pressure into said tube said elongate distal end portion expands laterally first, said lateral expansion beginning initially in and progressing along said elongate diStal end portion in preference to lateral expansion of the remainder of said tube; and including an elongate flexible wire secured to the connector and the distal end of the tube, extending through the tube to prevent extension and to guide the tube during insertion.
Claim 3
Dependent Claim
24 words
The improved expansible tip catheter defined in claim 1 wherein the outside diameter of the unexpanded tube is substantially uniform along the length thereof.
Claim 4
Dependent Claim
55 words
The improved expansible tip catheter defined in claim 1 wherein the tube is constructed in two sections, an elongate tip portion composed of a resilient polymer, and the remainder of the tube which is composed of flexible polymer, the resilient polymer tip portion being less resistant to lateral expansion than the remainder of the tube.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-28 | 1979-01-27 | 1979-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-28 | 1983-01-27 | 1983-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-28 | 1987-01-27 | 1987-07-29 | $7700.00 | Window Closed / Lapsed |