Sediment control
2 Assignments
0 Petitions
Accused Products
Abstract
A sediment control roll includes a threshold member having large apertures therethrough, a hollow sediment collection chamber, and an outflow filter having small apertures therethrough. The sediment control roll can be used to collect sediment in runoff from a construction site, or to reduce removal of sediment from an existing land mass. The sediment control roll can for example be made by rolling up extruded polymeric netting with filter cloth attached thereto.
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Citations
20 Claims
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1-5. -5. (canceled)
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6. A method of collecting sediment from a flowing stream of a sediment-bearing liquid which comprises
(A) passing the flowing stream through a threshold member having a multiplicity of relatively large threshold apertures (a) which pass through the threshold member and (b) whose size is such that at least a substantial proportion, preferably all, of the sediment can pass through the threshold member; -
(B) passing the liquid stream from step (A) through a substantially unobstructed sediment collection chamber; and
(C) passing the liquid stream from step (B) through an outflow filter having a multiplicity of relatively small filter apertures (a) which pass through the filter and (b) whose size is such that at least a substantial proportion of the sediment cannot pass through the filter. - View Dependent Claims (7, 11)
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12. A method of making a sediment control roll, the method comprising
(A) providing a precursor for a sediment control roll, the precursor comprising (i) an apertured sheet material having relatively large apertures therethrough, and (ii) a sheet of filter material which has relatively small apertures therethrough and which is secured to part or all of the apertured sheet material; -
(B) rolling up the precursor to provide a generally tubular body (a) which comprises first and second parts of the apertured sheet material which overlap each other, and (b) in which at least part of the filter material is secured to at least part of an interior surface of the tubular body; and
(C) securing the overlapping first and second parts of the apertured sheet material together. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification