US5587125A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-coextrusion method of making multi-layer angioplasty balloons
Assignee: Boston Scientific Scimed Inc
•
Filing: 1994-08-15
•
Granted: 1996-12-24
•
Expires: 2014-08-15
Abstract
Abstract A non-coextrusion process for making multi-layer angioplasty balloons involves pre-forming separate parisons and then concentrically disposing the plural parisons to form a composite parison which is then subjected to a blow-molding process. The resulting balloon can have its properties tailored by appropriate selection of the particular plastics to be used for the multiple parisons.
Inventors
- 👤 Suranjan Roychowdhury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:14
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/10; A61M25/1027; A61M25/1029; A61M2025/1043; A61M2025/1075; A61M2025/1084
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
125 words
A method of manufacturing a multi-layer expander member for an angioplasty catheter comprising the steps of: a) preforming a first tubular parison of a polymeric material having first physical properties; b) preforming a second tubular parison of a polymeric material having second physical properties; c) later disposing one of said first and second preformed tubular parisons over the other of said first and second preformed tubular parisons to form a composite parison; d) heating said composite parison to a predetermined temperature; and e) blow-molding said composite parison in a mold having a cavity of a predetermined length and radial dimension to bond the polymeric material comprising the first tubular parison to the polymeric material comprising the second tubular parison in forming said multi-layer expander member.
Claim 2
Independent Claim
125 words
A method of manufacturing a multi-layer expander member for an angioplasty catheter comprising the steps of: a) preforming a first tubular parison of a polymeric material having first physical properties; b) preforming a second tubular parison of a polymeric material having second physical properties; c) later disposing one of said first and second preformed tubular parisons over the other of said first and second preformed tubular parisons to form a composite parison; d) heating said composite parison to a predetermined temperature; and e) blow-molding said composite parison in a mold having a cavity of a predetermined length and radial dimension to bond the polymeric material comprising the first tubular parison to the polymeric material comprising the second tubular parison in forming said multi-layer expander member.
Claim 3
Dependent Claim
23 words
The method as in claim 1 and further including the step of longitudinally stretching said composite parison simultaneously with the blow molding thereof.
Claim 4
Dependent Claim
42 words
The method as in claim 1 wherein said first tubular parison has a wall thickness in the range of from 0.018 and 0.030 inch and said second tubular parison has a wall thickness in the range of from 0.005 to 0.015 inch.
Claim 5
Dependent Claim
27 words
The method as in claim 3 wherein a variation in wall thickness over the length of each of said first and second parisons is under 10 percent.
Claim 6
Dependent Claim
25 words
The method as in claim 4 wherein said variation in wall thickness of said first and second parisons is between 3 percent and 0 percent.
Claim 7
Dependent Claim
25 words
The method as in claim 1 wherein said first tubular parison is formed from a polyester material and said second tubular parison is a polyamide.
Claim 8
Dependent Claim
25 words
The method as in claim 1 wherein said first tubular parison is polyethylene terethphalate and said second tubular parison is an abrasion resistant polymer material.
Claim 9
Dependent Claim
31 words
The method as in claim 7 wherein said abrasion resistant polymer material is selected from the group consisting of Nylon 6, Nylon 12, Nylon 6/6, polyethylene, polyurethane and a polyamide copolymer.
Claim 10
Dependent Claim
23 words
The method as in claim 1 wherein said second tubular parison comprises a tubular sleeve shorter in length than said first tubular parison.
Claim 11
Dependent Claim
25 words
The method as in claim 9 wherein said tubular sleeve is of a length equal to the predetermined length of the cavity of the mold.
Claim 12
Dependent Claim
41 words
The method as in claim 10 wherein a fluid is introduced under pressure into said first tubular member in said blow-molding step to radially expand said first tubular parison into intimate contact with said tubular sleeve to fuse the two together.
Claim 13
Dependent Claim
53 words
The method of claim 1 and further including the steps of: a) forming a tubular member of a polymeric material thermally bondable to said first and second tubular parisons; and b) concentrically disposing said tubular member between said first preformed tubular parison and said second preformed tubular parison prior to the blow-molding step.
Claim 14
Dependent Claim
46 words
The method of claim 12 wherein said polymeric material of said tubular member is selected from the group consisting of ethylene propylene copolymer, ethylene vinyl acetate polymer, ethylene vinyl alcohol polymer, polysiloxane, polyethylene and copolymers thereof, polyolefin, polyurethane, polyvinyl chloride, polychorotriethylene, ethyl tetrafluoroethylene polymer, and polyamide.
Claim 15
Independent Claim
150 words
A method of manufacturing a multilayer expander member for an angioplasty catheter comprising the steps of: a) placing separately prepared inner and outer polymer tubes in telescoped relation with one another onto a cylindrical mandrel having a predetermined outer diameter, each polymer being of differing physical properties; b) simultaneously stretching said inner and outer polymer tubes until said inner tube conforms to said outer surface of said cylindrical mandrel to provide a predetermined total wall thickness for said inner and outer polymer tubes; c) removing said inner and outer polymer tubes from said mandrel yielding a composite parison, said composite parison having a lumen corresponding to said outer diameter of said mandrel; d) heating said composite parison to a predetermined temperature; and e) expanding said composite parison both longitudinally and radially within a mold to biaxially orient and bond the polymer material comprising said inner and outer polymer tubes together.
Claim 16
Independent Claim
150 words
A method of manufacturing a multilayer expander member for an angioplasty catheter comprising the steps of: a) placing separately prepared inner and outer polymer tubes in telescoped relation with one another onto a cylindrical mandrel having a predetermined outer diameter, each polymer being of differing physical properties; b) simultaneously stretching said inner and outer polymer tubes until said inner tube conforms to said outer surface of said cylindrical mandrel to provide a predetermined total wall thickness for said inner and outer polymer tubes; c) removing said inner and outer polymer tubes from said mandrel yielding a composite parison, said composite parison having a lumen corresponding to said outer diameter of said mandrel; d) heating said composite parison to a predetermined temperature; and e) expanding said composite parison both longitudinally and radially within a mold to biaxially orient and bond the polymer material comprising said inner and outer polymer tubes together.
Claim 17
Dependent Claim
24 words
The method as in claim 14 wherein said step of expanding said composite parison radially comprises injecting a fluid under pressure into said lumen.
Claim 18
Dependent Claim
34 words
The method as in claim 14 wherein said step of expanding said composite parison both longitudinally and radially includes simultaneously injecting a fluid under pressure into said lumen and longitudinally stretching said composite parison.
Claim 19
Dependent Claim
26 words
The method of claim 14 wherein said inner polymer tube is formed from a thermoplastic selected from the group consisting of polyethylene terephthalate, acrylonitrile-butadiene-styrene (ABS), ABS/polycarbonate.
Claim 20
Dependent Claim
33 words
The method of claim 14 wherein said outer polymer tube is formed from a thermoplastic selected from the group consisting of nylon, polyether block amide, polyethylene, polyurethane, polyvinyl, chloride, polycaprolactam, and N-vinyl-pyrrolidone polymer.
References Cited (Backward Citations)
US3449792A
Cited
JPS58187319A
Cited
US4490421A
Cited
US4775371A
Cited
US5358486A
Cited
US5207700A
Cited
US4952357A
Cited
US5270086A
Cited
US5087394A
Cited
US5290306A
Cited
EP0457456A1
Cited
WO1992019316A1
Cited
US5195969A
Cited
EP0553960A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-12-24 | 2000-06-24 | 2000-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-12-24 | 2004-06-24 | 2004-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-12-24 | 2008-06-24 | 2008-12-24 | $7700.00 | Window Closed / Lapsed |