US5282846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ravel-resistant, self-supporting woven vascular graft
Assignee: Lockheed Martin Corp
•
Filing: 1992-04-29
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Granted: 1994-02-01
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Expires: 2012-04-29
Abstract
Abstract A ravel-resistant, self-supporting woven synthetic fabric vascular graft including a fusible fiber integrated into the weave in the filling yarn is provided. The graft is woven from multifilament polyester warp yarns which can be textured or flat. The filling yarn includes a low melting fusible fiber or resin which can be combined with a stiff monofilament. The monofilament component provides radial rigidity to improve kink and crush resistance. After heat setting, the low melting fusible resin fuses to orthogonal warp yarns at each intersection and provides ravel resistance to the finished graft. Improved kink resistance make the tubular grafts suitable for use in medium and small diameter peripheral applications. A preferred graft has a single velour outer surface and a smooth inner surface.
Inventors
- 👤 Peter J. Schmitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:20
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/04; A61F2/06; A61L; A61L27/00; A61L27/50; A61L27/507; A61L27/14; A61L27/18; A61L27/28; A61L27/34; D; D03; D03D; D03D15/00; D03D15/20; D03D15/283; D03D15/40; D03D15/41; D03D15/44; D03D15/46; D03D15/47; D03D15/49; D03D15/50; D03D15/573; D03D15/587; D03D27/00; D03D3/00; D03D3/02; A61F2002/065; C; C08; C08L; C08L67/00; C08L67/02; D10; D10B; D10B2321/00; D10B2321/02; D10B2321/021; D10B2321/04; D10B2321/042; D10B2331/00; D10B2331/04; D10B2331/10; D10B2401/00; D10B2401/04; D10B2401/041; D10B2401/06; D10B2401/062; D10B2509/00; D10B2509/06; Y; Y10; Y10S; Y10S623/00; Y10S623/92; Y10S623/921
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
101 words
A method of preparing a tubular ravel-resistant self-supporting woven vascular graft, comprising: weaving a plurality of warp yarns with a filling yarn into a tube, the filling yarn including a low melting temperature fusible component having a melting temperature lower than said warp yarns to bond to adjacent yarns when heat set, the filling yarn further including a stiffening component having a melting temperature higher than said low melting temperature fusible component which is woven into the weave to render the tubular graft self-supporting; and heat setting said graft to bond the fusible component in the filling yarn to warp yarns.
Claim 2
Independent Claim
101 words
A method of preparing a tubular ravel-resistant self-supporting woven vascular graft, comprising: weaving a plurality of warp yarns with a filling yarn into a tube, the filling yarn including a low melting temperature fusible component having a melting temperature lower than said warp yarns to bond to adjacent yarns when heat set, the filling yarn further including a stiffening component having a melting temperature higher than said low melting temperature fusible component which is woven into the weave to render the tubular graft self-supporting; and heat setting said graft to bond the fusible component in the filling yarn to warp yarns.
Claim 3
Dependent Claim
29 words
The method of claim 1, wherein the low melting temperature fusible component is a bicomponent fiber having a high melting temperature core and a low melting temperature polymer sheath.
Claim 4
Dependent Claim
29 words
The method of claim 1, including weaving the graft into a tube and heat setting by placing the tube on a mandrel and heating to bond the fusible component.
Claim 5
Dependent Claim
51 words
The method of claim 3, wherein heat setting includes placing the graft onto a mandrel in a stretched condition and heating to bond the fusible component and compressing the graft longitudinally on said mandrel and heating to set the yarns in a crimped condition to impart longitudinal stretch to the graft.
Claim 6
Dependent Claim
19 words
The method of claim 1, wherein the low melting temperature fusible component is a sheath about the stiffening component.
Claim 7
Dependent Claim
13 words
The method of claim 1, including weaving the warp yarns including multifilament yarns.
Claim 8
Dependent Claim
14 words
The method of claim 1, including weaving with a filling yarn including multifilament yarn.
Claim 9
Dependent Claim
21 words
The method of claim 1, including weaving with a filling yarn wherein the stiffening component is wound together with multifilament yarns.
Claim 10
Dependent Claim
17 words
The method of claim 1, including weaving at least one surface of the prosthesis with a velour.
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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) | 1997-01-31 | 1997-08-02 | 1998-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-01-31 | 2001-08-02 | 2002-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-01-31 | 2005-08-02 | 2006-02-01 | $7700.00 | Window Closed / Lapsed |