US4588461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing a vessel prosthesis
Assignee: INTERMEDIENT GmbH
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Filing: 1984-12-13
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Granted: 1986-05-13
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Expires: 2004-12-13
Abstract
Abstract To produce a vessel prosthesis, a hose (12) is wrapped with a reinforcing thread (13) to avoid bending and clogging of the vessel prosthesis. The reinforcing thread (13) is wound substantially tensionless on the soft hose (12) thus prohibiting wavy deformations inside the hose. To exclude prior to the solidification of the adhesive connection a displacement of the reinforcing thread (13) being bonded to the hose, a band-shaped spacer (14) is wound up together with the reinforcing thread (13) and removed subsequently.
Inventors
- 👤 Bernd Braun
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:08
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/04; A61F2/06
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
119 words
A method for producing a vessel prosthesis that is resistant to bending and possesses a smooth interior, which comprises the following steps: (a) covering a mandrel with a cylindrical hose having a smooth interior; (b) winding at least one reinforcing thread and a band-shaped spacer around said hose with individual windings of said thread separated by windings of said band-shaped spacer so that said thread rests loosely but stably on said hose with said interior of said hose remaining smooth; then, (c) bonding said thread to said cylindrical hose so that said interior of said hose remains smooth; then, (d) removing said band-shaped spacer; and then, (e) removing said cylindrical hose with said thread bonded thereto from said mandrel.
Claim 2
Independent Claim
119 words
A method for producing a vessel prosthesis that is resistant to bending and possesses a smooth interior, which comprises the following steps: (a) covering a mandrel with a cylindrical hose having a smooth interior; (b) winding at least one reinforcing thread and a band-shaped spacer around said hose with individual windings of said thread separated by windings of said band-shaped spacer so that said thread rests loosely but stably on said hose with said interior of said hose remaining smooth; then, (c) bonding said thread to said cylindrical hose so that said interior of said hose remains smooth; then, (d) removing said band-shaped spacer; and then, (e) removing said cylindrical hose with said thread bonded thereto from said mandrel.
Claim 3
Dependent Claim
18 words
A method as in claim 1, wherein step (c) includes welding said reinforcing thread to said cylindrical hose.
Claim 4
Independent Claim
165 words
A method for producing a vessel prosthesis that is resistant to bending and possesses a smooth interior, which comprises the following steps: (a) covering a mandrel with a cylindrical hose having a smooth interior; (b) coating an underside of at least one reinforcing thread with a solvent of said thread and said hose so that when said thread is loosely wound around said hose said thread and said hose are dissolved at areas of contact without substantially affecting said interior of said hose; then, (c) winding said thread and a band-shaped spacer around said hose with individual windings of said thread separated by winding of said band-shaped spacer so that said thread rests loosely but stably on said hose with said underside of said thread in contact with said hose, and said interior of said hose remaining substantially smooth; then, (d) evaporating said solvent; then, (e) removing said band-shaped spacer; and then, (f) removing said cylindrical hose with said thread bonded thereto from said mandrel.
Claim 5
Independent Claim
165 words
A method for producing a vessel prosthesis that is resistant to bending and possesses a smooth interior, which comprises the following steps: (a) covering a mandrel with a cylindrical hose having a smooth interior; (b) coating an underside of at least one reinforcing thread with a solvent of said thread and said hose so that when said thread is loosely wound around said hose said thread and said hose are dissolved at areas of contact without substantially affecting said interior of said hose; then, (c) winding said thread and a band-shaped spacer around said hose with individual windings of said thread separated by winding of said band-shaped spacer so that said thread rests loosely but stably on said hose with said underside of said thread in contact with said hose, and said interior of said hose remaining substantially smooth; then, (d) evaporating said solvent; then, (e) removing said band-shaped spacer; and then, (f) removing said cylindrical hose with said thread bonded thereto from said mandrel.
Claim 6
Dependent Claim
22 words
A method as in claim 3 wherein step (a) includes forming said cylindrical hose on said mandrel from a plurality of threads.
Claim 7
Dependent Claim
18 words
A method as in claim 4 wherein said cylindrical hose comprises polyurethane, and said reinforcing thread comprises polyurethane.
Claim 8
Dependent Claim
40 words
A method as in claim 4 wherein step (a) further includes initially slipping a flexible sheathing on said mandrel, and wherein step (f) includes stretching said flexible sheathing longitudinally so that an outer diameter of said flexible sheathing is reduced.
Claim 9
Dependent Claim
18 words
A method as in claim 6 wherein said cylindrical hose comprises polyurethane, and said reinforcing thread comprises polyurethane.
Claim 10
Dependent Claim
39 words
A method as in claim 3 wherein step (a) includes initially slipping a flexible sheathing on said mandrel, and wherein step (f) includes stretching said flexible sheathing longitudinally so that an outer diameter of said flexible sheathing is reduced.
Claim 11
Dependent Claim
18 words
A method as in claim 8 wherein said cylindrical hose comprises polyurethane, and said reinforcing thread comprises polyurethane.
Claim 12
Dependent Claim
18 words
A method as in claim 3 wherein said cylindrical hose comprises polyurethane, and said reinforcing thread comprises polyurethane.
Claim 13
Dependent Claim
17 words
A method as in claim 3 wherein said band-shaped spacer comprises a material inert to said solvent.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-05-12 | 1989-11-11 | 1990-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-12 | 1993-11-11 | 1994-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-12 | 1997-11-11 | 1998-05-13 | $7700.00 | Window Closed / Lapsed |