US3721231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catheter for high pressure injections
Assignee: Becton Dickinson and Co
•
Filing: 1971-02-01
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Granted: 1973-03-20
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Expires: 1991-02-01
Abstract
Abstract A medical catheter is formed from a hub within which an elongated flexible tube is disposed. The bore of the tubing within the hub is tapered to accept the tapered tip of a male connector. The tubing is coextensive with the shaft of the hub. A method for fabricating the medical catheter involves mounting the hub on a mandrel, which has a tapered portion, adapted to be positioned within the hub, and an elongated pilot extending from the tapered portion through the hub. Heat softenable catheter tubing is fed onto the tapered portion until resistance is met, then the tubing while heat softened, is forced over the tapered portion of the mandrel in the recess between the tapered portion and the hub. The tubing is solidified and the joined catheter removed from the mandrel.
Inventors
- 👤 F Hubert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:15
CPC Classifications
A; A61; A61M; A61M39/00; A61M39/10; A61M25/00; A61M25/0009; A61M25/0014; A61M25/0097; A61M2039/1038
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
184 words
A catheter for high pressure applications adapted for connection to a source of fluid comprising: a rigid hub of a first plastic material having a passageway therethrough; said hub having means on the exterior surface thereof to facilitate its connection to a fluid source; an elongated flexible tube of a second plastic material with a passageway therethrough having an end adapted for insertion into the body and said tube including means therein to facilitate connection to a fluid source; and said flexible tube having the other end thereof extending substantially through said hub passageway and being connected to the hub on a substantial portion of the inner surface of the hub by being deformable under pressure and heat below the deformation temperature of the first plastic material to permit the positioning of one end portion thereof into a substantially coaxial concentric location in the hub with the outer wall of said one end portion in rigid interengagement with the adjacent inner wall of the hub thereby preventing axial movement of said one end portion with respect to said hub during use of the catheter.
Claim 2
Dependent Claim
184 words
A catheter for high pressure applications adapted for connection to a source of fluid comprising: a rigid hub of a first plastic material having a passageway therethrough; said hub having means on the exterior surface thereof to facilitate its connection to a fluid source; an elongated flexible tube of a second plastic material with a passageway therethrough having an end adapted for insertion into the body and said tube including means therein to facilitate connection to a fluid source; and said flexible tube having the other end thereof extending substantially through said hub passageway and being connected to the hub on a substantial portion of the inner surface of the hub by being deformable under pressure and heat below the deformation temperature of the first plastic material to permit the positioning of one end portion thereof into a substantially coaxial concentric location in the hub with the outer wall of said one end portion in rigid interengagement with the adjacent inner wall of the hub thereby preventing axial movement of said one end portion with respect to said hub during use of the catheter.
Claim 3
Dependent Claim
21 words
The invention in accordance with claim 1 wherein the first plastic material is polypropylene and the second plastic material is polyethylene.
Claim 4
Dependent Claim
69 words
The invention in accordance with claim 1 wherein the means on the exterior surface of the hub to facilitate its connection to a fluid source includes a threaded end portion for interengagement with a threaded corresponding surface on the fluid source, and the means in the tube to facilitate connection to the fluid source includes a tapered inner surface for frictional interengagement with corresponding surfaces on the fluid source.
Claim 5
Dependent Claim
33 words
The invention in accordance with claim 3 wherein the hub has a tapered portion extended axially from said threaded outer surface portion and a cylindrical neck portion extending axially from the tapered portion.
Claim 6
Dependent Claim
52 words
The invention in accordance with claim 1 wherein the end of said tube distal from said hub terminates in a blunt tapered tip adapted to be introduced into a body vessel, and a plurality of ports communicating with the passageway through the tube and being spaced adjacent said tip of the tube.
Claim 7
Dependent Claim
42 words
The invention in accordance with claim 1 wherein the hub has at least one annular channel recess on the inner surface of the hub and positioned so that the tube when deformed under pressure and heat enters said channel and solidifies therein.
Claim 8
Dependent Claim
27 words
The invention in accordance with claim 1 wherein a pair of opposed wings extend outwardly from said hub to form a gripping surface for manipulating the catheter.
Claim 9
Dependent Claim
40 words
The invention in accordance with claim 1 wherein the one end portion of said tube positioned within said hub has a central portion of greater thickness than the two distal end parts of the one end portion of the tube.
References Cited (Backward Citations)
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Cited
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US3055361A
Cited
US3312220A
Cited
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Cited
US3469579A
Cited
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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) | 1976-03-19 | 1976-09-18 | 1977-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-19 | 1980-09-18 | 1981-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-19 | 1984-09-18 | 1985-03-20 | $7700.00 | Window Closed / Lapsed |