US5001825A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catheter guidewire fabrication method
Assignee: Cordis Corp
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Filing: 1988-11-03
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Granted: 1991-03-26
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Expires: 2008-11-03
Abstract
Abstract A fabrication process for a guidewire. A guidewire core is provided by drawing down a metal wire in stages. The wire is drawn through a first die to produce a first diameter wire. This first diameter wire is then partially drawn through a second die to provide a second, reduced diameter wire segment at one end of the core wire.
Inventors
- 👤 David S. Halpern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:05
CPC Classifications
B; B21; B21C; B21C1/00; A; A61; A61M; A61M25/00; A61M25/01; A61M25/09; B21C37/00; B21C37/04; B21C37/045; A61M2025/09058; A61M2025/09083; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49881
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
180 words
A method of fabricating a guidewire to be inserted within a subject comprising the steps of: (a) providing an elongated core wire of a specified diameter and length; (b) drawing the core wire at ambient temperature through a plurality of dies having different inner diameters thereby forming: a first cylindrical portion; a second cylindrical portion having a diameter less than a diameter of the first cylindrical portion and located distalward of the first cylindrical portion; a first region separating said first and second cylindrical portions, said region comprising a plurality of shouldered cylindrical steps and having less axial length than either said first or second cylindrical portion; a third cylindrical portion having a diameter less than the diameter of the second cylindrical portion and located distalward of the second cylindrical portions; and a second region separating said second and third cylindrical portions, said region comprising a plurality of shouldered cylindrical steps and having less axial length than either said second or third cylindrical portions; and (c) surrounding at least a portion of the core wire with a flexible coiled spring.
Claim 2
Independent Claim
180 words
A method of fabricating a guidewire to be inserted within a subject comprising the steps of: (a) providing an elongated core wire of a specified diameter and length; (b) drawing the core wire at ambient temperature through a plurality of dies having different inner diameters thereby forming: a first cylindrical portion; a second cylindrical portion having a diameter less than a diameter of the first cylindrical portion and located distalward of the first cylindrical portion; a first region separating said first and second cylindrical portions, said region comprising a plurality of shouldered cylindrical steps and having less axial length than either said first or second cylindrical portion; a third cylindrical portion having a diameter less than the diameter of the second cylindrical portion and located distalward of the second cylindrical portions; and a second region separating said second and third cylindrical portions, said region comprising a plurality of shouldered cylindrical steps and having less axial length than either said second or third cylindrical portions; and (c) surrounding at least a portion of the core wire with a flexible coiled spring.
Claim 3
Dependent Claim
24 words
A method according to claim 1 including the additional step of heating the core wire under tension after drawing thereby straightening the core wire.
Claim 4
Dependent Claim
23 words
A method according to claim 1 wherein the drawing step comprises drawing said third cylindrical section to an outer diameter less than 0.005".
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) | 1994-03-25 | 1994-09-24 | 1995-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-03-25 | 1998-09-24 | 1999-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-03-25 | 2002-09-24 | 2003-03-26 | $7700.00 | Window Closed / Lapsed |