US4181450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Erosion control matting
Assignee: Akzona Inc
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Filing: 1977-04-04
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Granted: 1980-01-01
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Expires: 1997-04-04
Abstract
Abstract A porous, reinforced, erosion control matting is provided by a relatively open, self-supporting, three-dimensionally looped structure of synthetic filaments having a diameter of at least 0.06 mm., with a backing of a decay-resistant or rot-resistant, comparatively dense web or fabric which is bonded to at least some of the filaments of the matting, and with a lattice or open-mesh reinforcing facing member extending parallel to the backing to provide an upper surface of crossbars onto which the looped synthetic filaments are laid so as to be interlocked with the crossbars while extending downwardly between the crossbars to form porous alveolate cells. The matting is highly useful in preventing soil erosion while also being easily manufactured and installed in any given location.
Inventors
- 👤 Alfred Rasen
- 👤 Rolf Vollbrecht
- 👤 Klemens Schenesse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:17
CPC Classifications
E; E02; E02B; E02B3/00; E02B3/04; E02B3/043; E02B3/12; E02B3/122; E02B3/126; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149; Y10T428/24273; Y10T428/24322; Y10T428/24331; Y10T428/24339; Y10T442/00; Y10T442/10; Y10T442/102; Y10T442/159
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
142 words
A porous, reinforced, erosion control matting which comprises: an open-mesh reinforcing lattice or crossbars defining an upper facing side of the matting; a plurality of continuous, melt-spun, substantially amorphous, synthetic polymer filaments having a diameter of at least about 0.06 mm., said filaments being laid onto and interlocked with substantially all of the crossbars of said lattice in the form of longitudinally and transversely overlapping loops of intermingled filaments bonded at random points of intersection and extending downwardly from said lattice to form porous multi-walled alveolate cells between the crossbars in a self-supporting, three-dimensional, looped structure; and a soil-retaining, fibrous backing member defining a bottom facing side of the matting arranged approximately parallel to said lattice and at a distance therefrom sufficient to receive at least several millimeters of soil, at least part of the filaments being bonded to said backing member.
Claim 2
Dependent Claim
142 words
A porous, reinforced, erosion control matting which comprises: an open-mesh reinforcing lattice or crossbars defining an upper facing side of the matting; a plurality of continuous, melt-spun, substantially amorphous, synthetic polymer filaments having a diameter of at least about 0.06 mm., said filaments being laid onto and interlocked with substantially all of the crossbars of said lattice in the form of longitudinally and transversely overlapping loops of intermingled filaments bonded at random points of intersection and extending downwardly from said lattice to form porous multi-walled alveolate cells between the crossbars in a self-supporting, three-dimensional, looped structure; and a soil-retaining, fibrous backing member defining a bottom facing side of the matting arranged approximately parallel to said lattice and at a distance therefrom sufficient to receive at least several millimeters of soil, at least part of the filaments being bonded to said backing member.
Claim 3
Dependent Claim
28 words
An erosion control matting as claimed in claim 1 wherein the alveolate cells have a rectangular cross section taken in the plane of or parallel to said lattice.
Claim 4
Dependent Claim
28 words
An erosion control matting as claimed in claim 1 wherein the alveolate cells have a hexaganol cross section taken in the plane of or parallel to said lattice.
Claim 5
Dependent Claim
23 words
An erosion control matting as claimed in claim 1 wherein the diameter of the synthetic polymer filaments is about 0.4 to 1.2 mm.
Claim 6
Dependent Claim
27 words
An erosion control matting as claimed in claim 1 wherein the synthetic polymer of the filaments is selected from the group consisting of polyolefins, polyesters and polyamides.
Claim 7
Dependent Claim
18 words
An erosion control matting as claimed in claim 1 wherein the synthetic polymer of the filaments is polycaprolactam.
Claim 8
Dependent Claim
21 words
An erosion control matting as claimed in claim 1 wherein the backing member is composed of synthetic polymer fibers or filaments.
Claim 9
Dependent Claim
24 words
An erosion control matting as claimed in claim 1 wherein the alveolate cells have a depth D which is greater than about 1 cm.
Claim 10
Dependent Claim
27 words
An erosion control matting as claimed in claim 8 wherein the greatest width W of the alveolate cells does not exceed the depth D of said cells.
Claim 11
Dependent Claim
27 words
An erosion control matting as claimed in claim 9 wherein the ratio of depth to width D/W of the alveolate cells is between about 2 and 5.
Claim 12
Dependent Claim
23 words
An erosion control matting as claimed in claim 1 wherein the alveolate cells have a depth D of about 2 to 15 cm.
Claim 13
Dependent Claim
27 words
An erosion control matting as claimed in claim 11 wherein the greatest width W of the alveolate cells does not exceed the depth D of said cells.
Claim 14
Dependent Claim
27 words
An erosion control matting as claimed in claim 12 wherein the ratio of depth to width D/W of the alveolate cells is between about 2 and 5.
Claim 15
Dependent Claim
27 words
An erosion control matting as claimed in claim 1 wherein the greatest width W of the alveolate cells does not exceed the depth D of said cells.
Claim 16
Dependent Claim
27 words
An erosion control matting as claimed in claim 14 wherein the ratio of depth to width D/W of the alveolate cells is between about 2 and 5.
Claim 17
Dependent Claim
25 words
An erosion control matting as claimed in claim 1 wherein the backing member is a water-permeable, soil-retaining, rot-resistant, comparatively dense woven, non-woven or knitted fabric.
Claim 18
Dependent Claim
32 words
An erosion control matting as claimed in claim 16 wherein the fabric backing member contains filaments or fibers of a substantially lower softening point than the synthetic filaments forming the alveolate cells.
Claim 19
Dependent Claim
22 words
An erosion control matting as claimed in claim 16 wherein the backing member is a non-woven fabric of tangled fibers or filaments.
Claim 20
Dependent Claim
37 words
An erosion control matting as claimed in claim 18 wherein the fibers or filaments of the non-woven backing member are made of a synthetic polymer selected from the group consisting of polyethylene terephthalate, polyhexamethylene adipamide and polycaprolactam.
Claim 21
Dependent Claim
31 words
An erosion control matting as claimed in claim 18 wherein the backing member contains fibers or filaments of a substantially lower softening point than the synthetic filaments forming the alveolate cells.
Claim 22
Dependent Claim
62 words
An erosion control matting as claimed in claim 1 wherein said open-mesh lattice provides a mesh opening of at least about 5 mm., said fibrous backing member has a mesh size of at least about 10 meshes per inch, and the walls of said alveolate cells have a mesh size on the order of about 3 up to 200 meshes per inch.
Claim 23
Dependent Claim
54 words
An erosion control matting as claimed in claim 21 wherein the mesh opening of said lattice is about 1 to 5 cm., the mesh size of the backing member is about 40 to 400 meshes per inch, and the mesh size of the alveolate cell walls is about 10 to 60 meshes per inch.
Claim 24
Dependent Claim
42 words
An erosion control matting as claimed in claim 21 wherein the mesh size of the backing member is about 60 to 300 meshes per inch, and the mesh size of the alveolate cell walls is about 10 to 60 meshes per inch.
Claim 25
Dependent Claim
22 words
An erosion control matting as claimed in claim 23 wherein the mesh opening of said lattice is about 1 to 5 cm.
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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) | 1982-12-31 | 1983-07-02 | 1984-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-31 | 1987-07-02 | 1988-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-31 | 1991-07-02 | 1992-01-01 | $7700.00 | Window Closed / Lapsed |