Sediment control
First Claim
Patent Images
1. A sediment control roll which comprisesan elongate threshold member having a multiplicity of threshold apertures therethrough, each of the threshold apertures having an area of 0.01 to 1.0 in2;
- 2) an elongate outflow member having a multiplicity of outflow apertures therethrough, each of the outflow apertures having an area of 0.01 to 1.0 in2; and
3) an elongate outflow filter which(i) lies between the threshold member and the outflow member, and(ii) has a multiplicity of filter apertures therethrough,each of the filter apertures having an area of less than 0.01 in2;
the sediment control roll comprising a substantially hollow, elongate sediment collection chamber which lies between the threshold member and the outflow filter.
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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
22 Claims
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1. A sediment control roll which comprisesan elongate threshold member having a multiplicity of threshold apertures therethrough, each of the threshold apertures having an area of 0.01 to 1.0 in2;
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2) an elongate outflow member having a multiplicity of outflow apertures therethrough, each of the outflow apertures having an area of 0.01 to 1.0 in2; and 3) an elongate outflow filter which (i) lies between the threshold member and the outflow member, and (ii) has a multiplicity of filter apertures therethrough, each of the filter apertures having an area of less than 0.01 in2; the sediment control roll comprising a substantially hollow, elongate sediment collection chamber which lies between the threshold member and the outflow filter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
has a weight after the test which is not more than 1.1 times its weight before the test.
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9. A sediment control roll according to claim 1 which, when subjected to a test in which clean water is directed towards the roll at right angles to the threshold member, the roll is capable of passing at least 20 gallons of water, but not more than 40 gallons of water, per minute per square foot of the frontal area of the threshold member, and the volumes of water entering and leaving any particular length of the roll differ by less than 10%, based on the volume of water entering the roll.
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10. A sediment control roll according to claim 1 which has a dry weight of 0.65 to 1.8 lb/ft.
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11. A sediment control roll which comprisesan elongate threshold member which is composed of a multiplicity of polymeric strands;
- each of the polymeric strands having a thickness, viewed at right angles to the plane of the threshold member, of 0.1 to 0.2 in;
the polymeric strands being connected together at junction points and defining a multiplicity of threshold apertures through the threshold member, each of the threshold apertures having an area of 0.02 to 0.25 in2; and
the solid surface area of the threshold member being 25 to 65% of the total area of the exposed surface of the threshold member;2) an elongate outflow member which is composed of a multiplicity of polymeric strands;
each of the polymeric strands having a thickness, viewed at right angles to the plane of the outflow member, of 0.1 to 0.2 in;
the polymeric strands being connected together at junction points and defining a multiplicity of outflow apertures through the outflow member, each of the outflow apertures having an area of 0.02 to 0.25 in2; and
the solid surface area of the outflow member being 25 to 65% of total area of the exposed surface of the outflow member;3) an elongate outflow filter which (i) is supported by the outflow member, (ii) comprises a synthetic polymer, and (ii) has a mesh size of 80 to 600 micron; and 4) a location member which extends away from the threshold and outflow members; the sediment control roll comprising an elongate sediment collection chamber which (i) lies between the threshold member and the outflow member, (ii) has an unobstructed volume which is 50 to 98% of total volume of the sediment control roll. - View Dependent Claims (12, 13, 14)
has a weight after the test which is not more than 1.1 times its weight before the test.
- each of the polymeric strands having a thickness, viewed at right angles to the plane of the threshold member, of 0.1 to 0.2 in;
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14. A sediment control roll according to claim 11 which, when subjected to a test in which clean water is directed towards the roll at right angles to the threshold member, the roll is capable of passing at least 20 gallons of water, but not more than 40 gallons of water, per minute per square foot of the frontal area of the threshold member, and the volumes of water entering and leaving any particular length of the roll differ by less than 10%, based on the volume of water entering the roll.
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15. A sediment control roll which comprisesan elongate threshold member having a multiplicity of threshold apertures therethrough, each of the threshold apertures having an area of 0.01 to 1.0 in2;
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2) an elongate outflow member having a multiplicity of outflow apertures therethrough, each of the outflow apertures having an area of 0.01 to 1.0 in2; 3) an elongate outflow filter which (i) is secured to the outflow member, and (ii) has a multiplicity of filter apertures therethrough, each of the filter apertures having an area of less than 0.1 in2; and 4) a location member which extends away from the threshold and outflow members; the sediment control roll comprising a substantially hollow, elongate sediment collection chamber which lies between the threshold member and the outflow member; and
the threshold member, the outflow member, and at least part of the location member being provided by a single piece of an apertured polymeric sheet having a multiplicity of apertures therethrough, each of the apertures having an area of 0.01 to 1.0 in2.- View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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Specification