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US4719837A
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US
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Complex shaped braided structures
Assignee: EIDP Inc
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Filing: 1986-04-17
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Granted: 1988-01-19
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Expires: 2006-04-17
Abstract
Abstract A complex braided composite structure is formed of axial and braiding yarns using an interlacing pattern which allows all braiding yarn reversals to occur outside a multi-layer array of axial yarns concurrently at one location in the pattern thus allowing free manipulation of the yarns for forming complex shapes.
Inventors
- 👤 Ronald F. McConnell
- 👤 Peter Popper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:24
CPC Classifications
D; D04; D04C; D04C3/00; D04C3/48; B; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/10; B29C70/16; B29C70/24; D04C1/00; D04C1/06; D04C3/02; D04C3/04; D04C3/06; D04C3/12; D10; D10B; D10B2403/00; D10B2403/02; D10B2403/024; D10B2403/0241; D10B2403/02411; D10B2403/0243; D10B2403/03; D10B2403/033; D10B2403/0333; D10B2505/00; D10B2505/02
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
115 words
In a method for forming a braided structure that includes a multi-layer array of axial yarns extending longitudinally in the structure and braiding yarns by moving the braiding yarns towards and away from the outer periphery of the structure alternately in opposite directions in diagonal paths through the array in an interlacing pattern and interconnecting with other braiding yarns, the improvement comprising moving each of said braiding yarns in a first step in an interlacing pattern in said paths completely through the array to the outer periphery of the structure to reversal points before moving any of said braiding yarns in a second step in said paths in another diagonal direction from a reversal point.
Claim 2
Dependent Claim
115 words
In a method for forming a braided structure that includes a multi-layer array of axial yarns extending longitudinally in the structure and braiding yarns by moving the braiding yarns towards and away from the outer periphery of the structure alternately in opposite directions in diagonal paths through the array in an interlacing pattern and interconnecting with other braiding yarns, the improvement comprising moving each of said braiding yarns in a first step in an interlacing pattern in said paths completely through the array to the outer periphery of the structure to reversal points before moving any of said braiding yarns in a second step in said paths in another diagonal direction from a reversal point.
Claim 3
Dependent Claim
117 words
In a braided structure including a multi-layer array of axial yarns extending longitudinally in the structure and braiding yarns which alternatively extend towards and away from the outer periphery of the structure in opposite directions in paths through the array in an interlacing pattern and interconnect with other braiding yarns, the improvement comprising a repeating two-step interlacing pattern wherein each of said braiding yarns extend in diagonal paths completely through the array to the outer periphery of the structure to a reversal point in one step of the pattern before any of said braiding yarns extend in a path in another diagonal direction from said reversal point to another reversal point in another step of the pattern.
Claim 4
Dependent Claim
117 words
In a braided structure including a multi-layer array of axial yarns extending longitudinally in the structure and braiding yarns which alternatively extend towards and away from the outer periphery of the structure in opposite directions in paths through the array in an interlacing pattern and interconnect with other braiding yarns, the improvement comprising a repeating two-step interlacing pattern wherein each of said braiding yarns extend in diagonal paths completely through the array to the outer periphery of the structure to a reversal point in one step of the pattern before any of said braiding yarns extend in a path in another diagonal direction from said reversal point to another reversal point in another step of the pattern.
Claim 5
Dependent Claim
20 words
The structure of claim 2 wherein said axial yarns and said braiding yarns are of continuous filaments impregnated with polymer.
Claim 6
Dependent Claim
12 words
The structure of claim 2, wherein said structure is impregnated with polymer.
Claim 7
Dependent Claim
18 words
The structure of claim 4, wherein said structure is a T-beam and the polymer is a thermosetting resin.
Claim 8
Dependent Claim
23 words
The structure of claim 3 or claim 4 wherein the polymer is thermosetting or thermoplastic, and the filaments are carbon, aramids or glass.
Claim 9
Dependent Claim
14 words
The structure of claims 3 or 4 wherein said structure has a curved section.
Claim 10
Dependent Claim
14 words
The structure of claims 3 or 4 wherein said structure incorporates structural voids therein.
Claim 11
Dependent Claim
18 words
The structure of claims 2, 3, or 4 wherein said structure changes in cross section along its length.
Claim 12
Dependent Claim
21 words
The method of claim 1, wherein said axial yarns and said braiding yarns are comprised of continous filaments impregnated with polymer.
Claim 13
Dependent Claim
13 words
The method of claim 10, wherein the polymer is either thermoplastic or thermosetting.
Claim 14
Dependent Claim
16 words
The method of claim 10 wherein said continuous filaments are either carbon or aramid or glass.
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) | 1991-01-18 | 1991-07-20 | 1992-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-18 | 1995-07-20 | 1996-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-18 | 1999-07-20 | 2000-01-19 | $7700.00 | Window Closed / Lapsed |