US3634924A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making multilumen balloon catheter
Assignee: American Hospital Supply Corp
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Filing: 1970-04-20
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Granted: 1972-01-18
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Expires: 1990-04-20
Abstract
Abstract A multilumen tube is extruded from a thermoplastic material having a memory characteristic. An end portion of the tube is heated sufficiently to soften the plastic and permit the end portion to be drawn out to a reduced diameter. A pair of metal ferrules is placed on the reduced end portion in predetermined positions spaced a short distance apart. Then the reduced portion is heated in relaxed condition causing it to reexpand and lock the ferrules in place. Balloon inflation openings are formed communicating with one of the lumens. A sleeve of balloon material is secured by bindings over the ferrules. In one embodiment the tube is limp and the balloon is utilized as a sail to flow carry the catheter through a vein into and through the heart and into the pulmonary artery.
Inventors
- 👤 Lawrence W Blake
- 👤 Bruce D Bett
- 👤 Clement E Lieber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:07
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/10; A61M25/1027; A61M25/1034; A61M2025/1043; A61M2025/1065; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49865
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
109 words
The method of making a balloon catheter comprising providing a catheter tube of a thermoplastic material having a memory characteristic and containing a balloon inflation lumen, applying heat to an end portion of said tube sufficient to soften said material, drawing out and elongating said softened portion to shrink its diameter, applying a pair of rigid ferrules over said shrunken portion, applying heat to said shrunken portion to reexpand its diameter and lock said ferrules on said tube, forming a balloon inflation opening in said material communicating with said lumen, applying a sleeve of elastic balloon material over said reexpanded portion, and binding said balloon material to said ferrules.
Claim 2
Independent Claim
109 words
The method of making a balloon catheter comprising providing a catheter tube of a thermoplastic material having a memory characteristic and containing a balloon inflation lumen, applying heat to an end portion of said tube sufficient to soften said material, drawing out and elongating said softened portion to shrink its diameter, applying a pair of rigid ferrules over said shrunken portion, applying heat to said shrunken portion to reexpand its diameter and lock said ferrules on said tube, forming a balloon inflation opening in said material communicating with said lumen, applying a sleeve of elastic balloon material over said reexpanded portion, and binding said balloon material to said ferrules.
Claim 3
Dependent Claim
15 words
The method of claim 1 including the step of forming said tube initially by extrusion.
Claim 4
Dependent Claim
22 words
The method of claim 1 including the step of applying a rotary cutter to said tube to form said balloon inflation opening.
Claim 5
Dependent Claim
20 words
The method of claim 1 wherein said tube has a through flow lumen in addition to said balloon inflation lumen.
Claim 6
Dependent Claim
18 words
The method of claim 1 including the step of plugging the distal end of said balloon inflation lumen.
Claim 7
Dependent Claim
16 words
The method of claim 5 including the step of die-forming a contoured tip on said tube.
Claim 8
Dependent Claim
14 words
The method of claim 1 wherein said softening heat is applied by hot water.
Claim 9
Dependent Claim
14 words
The method of claim 1 wherein said reexpanding heat is applied by radiant energy.
References Cited (Backward Citations)
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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) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |