Patent US3009638A successfully refreshed from Google Patents.
US4898702A
Expired / Lapsed
US
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Method and apparatus for removal of a wire mandrel from a catheter
Assignee: Cordis Corp
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Filing: 1988-04-04
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Granted: 1990-02-06
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Expires: 2008-04-04
Abstract
Abstract A catheter fabrication method and apparatus. Two rotating contact rollers define a nip to engage a mandrel used in fabricating an elongated tubular catheter. The rollers pull the mandrel from the catheter as a retaining block prevents the catheter from moving with the mandrel. The rollers rotate in opposite directions and are driven by a variable speed direct current motor.
Inventors
- 👤 Jeffrey M. Elkins
- 👤 Russell F. Collins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:15
CPC Classifications
B; B29; B29C; B29C37/00; B29C37/0003; B29C37/0017; A; A61; A61M; A61M25/00; A61M25/0009; B29C48/00; B29C48/03; B29C48/06; B29L; B29L2031/00; B29L2031/753; B29L2031/7542
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
90 words
A method for fabricating a catheter comprising the steps of: extruding a plastic tubular layer over a wire mandrel to a desired thickness to form a catheter; exposing a portion of the mandrel at one end; pushing the exposed portion of the mandrel through a passageway in a body, said passageway having a diameter wide enough to receive the mandrel but not the extrusion; pushing the exposed end of the mandrel into a nip between two contact wheels; and turning the wheels, whereby the mandrel is withdrawn from the catheter.
Claim 2
Independent Claim
90 words
A method for fabricating a catheter comprising the steps of: extruding a plastic tubular layer over a wire mandrel to a desired thickness to form a catheter; exposing a portion of the mandrel at one end; pushing the exposed portion of the mandrel through a passageway in a body, said passageway having a diameter wide enough to receive the mandrel but not the extrusion; pushing the exposed end of the mandrel into a nip between two contact wheels; and turning the wheels, whereby the mandrel is withdrawn from the catheter.
Claim 3
Dependent Claim
41 words
The method of claim 1 wherein prior to the step of exposing a portion of the mandrel at one end the combined extrusion and mandrel is passed through a wire straightener to loosen the engagement between the extrusion and the mandrel.
Claim 4
Independent Claim
130 words
An apparatus for removing a wire mandrel from a plastic tubular extrusion to form an elongated catheter, an exposed portion of said mandrel extending beyond one end of the plastic tubular extrusion, comprising: a body having a throughpassage with a diameter greater than that of the wire mandrel but less than that of the plastic extrusion; and gripping means for gripping the exposed portion of the mandrel and pulling the mandrel through the body while the body restrains the motion of the plastic tubular extrusion; said gripping means comprising a pair of rotatably mounted rollers spaced near the throughpassage in the body to form a nip for grasping the exposed end of the mandrel as the mandrel is pushed through the body and pulling the mandrel from the tubular extrusion.
Claim 5
Independent Claim
130 words
An apparatus for removing a wire mandrel from a plastic tubular extrusion to form an elongated catheter, an exposed portion of said mandrel extending beyond one end of the plastic tubular extrusion, comprising: a body having a throughpassage with a diameter greater than that of the wire mandrel but less than that of the plastic extrusion; and gripping means for gripping the exposed portion of the mandrel and pulling the mandrel through the body while the body restrains the motion of the plastic tubular extrusion; said gripping means comprising a pair of rotatably mounted rollers spaced near the throughpassage in the body to form a nip for grasping the exposed end of the mandrel as the mandrel is pushed through the body and pulling the mandrel from the tubular extrusion.
Claim 6
Dependent Claim
27 words
The apparatus of claim 3, wherein a surface of one of the mounted rollers which contacts the wire mandrel is roughened to facilitate grasping the wire mandrel.
Claim 7
Dependent Claim
51 words
The apparatus of claim 3 including a wire straightener positioned along a travel path for the combined tubular extrusion and wire mandrel to receive the extrusion and mandrel and loosen an engagement between the extrusion and the mandrel before the tubular extrusion is separated from the mandrel by the gripping means.
Claim 8
Dependent Claim
25 words
The apparatus of claim 3 including means for rotating one of the rollers, whereby the rollers cooperate to pull the wire mandrel through the body.
Claim 9
Dependent Claim
15 words
The apparatus of claim 6 wherein the means for rotating the wheels includes a motor.
References Cited (Backward Citations)
US2013684A
Cited
US2330370A
Cited
US2418974A
Cited
US2561569A
Cited
US2959847A
Cited
US3284852A
Cited
US3585707A
Cited
US3668288A
Cited
US3690796A
Cited
DE2357275A1
Cited
US3946483A
Cited
US4201535A
Cited
US4218419A
Cited
US4246225A
Cited
US4284459A
Cited
US4321226A
Cited
US4311654A
Cited
US4291453A
Cited
US4484586A
Cited
US4629650A
Cited
US4490316A
Cited
US4764324A
Cited
US4551292A
Cited
JPH06285923A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-02-05 | 1993-08-07 | 1994-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-05 | 1997-08-07 | 1998-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-05 | 2001-08-07 | 2002-02-06 | $7700.00 | Window Closed / Lapsed |