US5091247A
Expired / Lapsed
US
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Woven geotextile grid
Assignee: Georgia Duck and Cordage Mill
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Filing: 1989-09-05
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Granted: 1992-02-25
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Expires: 2009-09-05
Abstract
Abstract Woven geotextile grid for earth reinforcement applications. The grid is formed of woven fabric which is coated with a suitable polyvinylchloride or other plastic coating. The fabric is formed of a plurality of spaced-apart pick yarn bundles which are interwoven with a plurality of spaced-apart warp yarn bundles. The pick yarn bundles are held in place in the warp yarn bundles with locking yarns which run parallel to the pick yarns and which are positioned adjacent to the edges of the pick yarn bundles. The warp yarns extend between the pick yarn bundles and locking yarns to lock the pick yarn bundles into place. A plurality of pairs of leno yarns oriented parallel to the warp yarns additionally strengthen the fabric by interlocking with one another in the spaces between pick yarn bundles and locking yarns. The result is a grid which has wide lateral and longitudinal members that lock together to form large interstices through which soil and water may penetrate. Strength of the grid may be adjusted laterally or longitudinally by varying (1) the number, size and composition of pick yarns and warp yarns; (2) the spacing between pick yarn bundles and warp yarn bundles and (3) the number, position and composition of the leno yarns. Coatings may be independently formulated to suit particular applications without detracting from strength properties of the grid.
Inventors
- 👤 Gary L. Willibey
- 👤 John W. Hawkins
- 👤 Russell P. Harp
- 👤 David M. Wilkinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:35
CPC Classifications
E; E02; E02D; E02D17/00; E02D17/20; D; D03; D03D; D03D1/00; D03D1/0035; D03D1/0041; D03D15/00; D03D15/20; D03D15/283; D03D15/50; D03D15/573; D03D19/00; E02D29/00; E02D29/02; E02D29/0225; E02D29/0241; D10; D10B; D10B2321/00; D10B2321/02; D10B2321/022; D10B2331/00; D10B2331/04; D10B2401/00; D10B2401/06; D10B2401/063; D10B2505/00; D10B2505/20; D10B2505/204; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249955; Y10T428/249958; Y10T428/249982; Y10T428/249983; Y10T442/00; Y10T442/10; Y10T442/102; Y10T442/172; Y10T442/178; Y10T442/20; Y10T442/2525; Y10T442/259
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
153 words
A woven grid for earth reinforcement, comprising: a plurality of spaced-apart bundles of pick yarns positioned adjacent to one another and forming a first and a second side of the grid; (b) a plurality of pairs of locking yarns oriented parallel to the pick yarns, each yarn in a locking yarn pair positioned adjacent to an edge of a pick yarn bundle; (c) a plurality of spaced-apart bundles of warp yarns positioned adjacent to one another, alternately positioned on the first and second sides of the pick yarn bundles and extending between each pick yarn bundle and its corresponding locking yarns; (d) a plurality of pairs of leno yarns oriented parallel to the warp yarns, the leno yarns in each pair positioned on opposite sides of the pick yarn bundles and interlocking with each other between each pick yarn bundle and its corresponding locking yarns; and (e) a plastic coating covering the yarns.
Claim 2
Dependent Claim
153 words
A woven grid for earth reinforcement, comprising: a plurality of spaced-apart bundles of pick yarns positioned adjacent to one another and forming a first and a second side of the grid; (b) a plurality of pairs of locking yarns oriented parallel to the pick yarns, each yarn in a locking yarn pair positioned adjacent to an edge of a pick yarn bundle; (c) a plurality of spaced-apart bundles of warp yarns positioned adjacent to one another, alternately positioned on the first and second sides of the pick yarn bundles and extending between each pick yarn bundle and its corresponding locking yarns; (d) a plurality of pairs of leno yarns oriented parallel to the warp yarns, the leno yarns in each pair positioned on opposite sides of the pick yarn bundles and interlocking with each other between each pick yarn bundle and its corresponding locking yarns; and (e) a plastic coating covering the yarns.
Claim 3
Dependent Claim
30 words
A woven grid according to claim 1 in which a pair of leno yarns is positioned adjacent to the warp yarns at the edges of each bundle of warp yarns.
Claim 4
Dependent Claim
29 words
A woven grid according to claim 2 further including at least one pair of leno yarns positioned between at least two warp yarns in each bundle of warp yarns.
Claim 5
Dependent Claim
34 words
A woven grid according to claim 1 in which the leno yarns are positioned on the same side of each locking yarn that they are positioned on the locking yarn's corresponding pick yarn bundle.
Claim 6
Dependent Claim
30 words
A woven grid according to claim 1 in which the warp, pick and locking yarns are formed of twisted polyester, and the leno yarns are formed of single-ply polyester filament.
Claim 7
Dependent Claim
19 words
A woven grid according to claim 1 in which the warp, pick and locking yarns are formed of polypropylene.
Claim 8
Dependent Claim
15 words
A woven grid according to claim 1 in which the coating is formed of polyvinylchloride.
Claim 9
Dependent Claim
13 words
A woven grid according to claim 1 in which the coating contains antimicrobials.
Claim 10
Dependent Claim
13 words
A woven grid according to claim 1 in which the coating contains fungicides.
Claim 11
Dependent Claim
14 words
A woven grid according to claim 1 in which the coating contains ultraviolet stabilizers.
Claim 12
Dependent Claim
200 words
A woven grid for earth reinforcement, comprising: (a) a plurality of spaced-apart bundles of pick yarns forming a first and second side of the grid, each bundle containing ten six-ply, 1,000 denier twisted-polyester pick yarns positioned adjacent to one another; (b) a plurality of pairs of locking yarns oriented parallel to the pick yarns, each yarn in each locking yarn pair formed of six-ply, 1,000 denier twisted-polyester and positioned adjacent to an edge of a pick yarn bundle; (c) a plurality of spaced-apart bundles of warp yarns, each bundle containing eight six-ply, 1,000 denier twisted-polyester warp yarns positioned adjacent to one another, alternately positioned on the first and second sides of the pick yarn bundles, and extending between each pick yarn bundle and its corresponding locking yarns; (d) a plurality of pairs of single-ply, 1300 denier polyester filament leno yarns oriented parallel to the warp yarns and positioned adjacent to outer warp yarns in each warp yarn bundle, the leno yarns in each pair alternately positioned on the first and second sides of the pick yarn bundles and interlocking with each other between each pick yarn bundle and its corresponding locking yarns; and (e) a polyvinylchloride coating covering the yarns.
Claim 13
Dependent Claim
200 words
A woven grid for earth reinforcement, comprising: (a) a plurality of spaced-apart bundles of pick yarns forming a first and second side of the grid, each bundle containing ten six-ply, 1,000 denier twisted-polyester pick yarns positioned adjacent to one another; (b) a plurality of pairs of locking yarns oriented parallel to the pick yarns, each yarn in each locking yarn pair formed of six-ply, 1,000 denier twisted-polyester and positioned adjacent to an edge of a pick yarn bundle; (c) a plurality of spaced-apart bundles of warp yarns, each bundle containing eight six-ply, 1,000 denier twisted-polyester warp yarns positioned adjacent to one another, alternately positioned on the first and second sides of the pick yarn bundles, and extending between each pick yarn bundle and its corresponding locking yarns; (d) a plurality of pairs of single-ply, 1300 denier polyester filament leno yarns oriented parallel to the warp yarns and positioned adjacent to outer warp yarns in each warp yarn bundle, the leno yarns in each pair alternately positioned on the first and second sides of the pick yarn bundles and interlocking with each other between each pick yarn bundle and its corresponding locking yarns; and (e) a polyvinylchloride coating covering the yarns.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1995-02-24 | 1995-08-26 | 1996-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-02-24 | 1999-08-26 | 2000-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-02-24 | 2003-08-26 | 2004-02-25 | $7700.00 | Window Closed / Lapsed |