Sediment control
First Claim
1. A sediment control roll which comprisesan elongate threshold member which comprises a melt-extruded polymeric netting composed of a plurality of polymeric strands which (a) define a plurality of substantially identical apertures, each of which has an area of 0.03 to 0.16 in2 and a minimum dimension of 0.015 to 0.4 in., and (b) have a solid surface area which is from 25 to 65% of the total area of the netting;
- 2) an elongate outflow member which comprises a melt-extruded polymeric netting composed of a plurality of polymeric strands which (a) define a plurality of substantially identical apertures, each of which has an area of 0.03 to 0.16 in2 and a minimum dimension of 0.015 to 0.4 in., and (b) have a solid surface area which is from 25 to 65% of the total area of the netting; and
3) an elongate outflow filter which (i) is secured to the outflow member, and (ii) has a mesh size of 80 to 500 micron;
the sediment control roll comprising a hollow, elongate sediment collection chamber which (i) lies between the threshold member and the outflow member and (ii) has an unobstructed volume which is at least 80% of the total volume of the sediment control roll.
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 mass of soil, sand or other sediment. The sediment control roll can for example be made by rolling up extruded polymeric netting with filter cloth attached thereto.
67 Citations
26 Claims
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1. A sediment control roll which comprisesan elongate threshold member which comprises a melt-extruded polymeric netting composed of a plurality of polymeric strands which
(a) define a plurality of substantially identical apertures, each of which has an area of 0.03 to 0.16 in2 and a minimum dimension of 0.015 to 0.4 in., and (b) have a solid surface area which is from 25 to 65% of the total area of the netting; -
2) an elongate outflow member which comprises a melt-extruded polymeric netting composed of a plurality of polymeric strands which (a) define a plurality of substantially identical apertures, each of which has an area of 0.03 to 0.16 in2 and a minimum dimension of 0.015 to 0.4 in., and (b) have a solid surface area which is from 25 to 65% of the total area of the netting; and
3) an elongate outflow filter which (i) is secured to the outflow member, and (ii) has a mesh size of 80 to 500 micron;
the sediment control roll comprising a hollow, elongate sediment collection chamber which (i) lies between the threshold member and the outflow member and (ii) has an unobstructed volume which is at least 80% of the total volume of the sediment control roll. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
has a weight after the test which is not more than 1.1 times, its weight before the test.
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12. A sediment 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 100 gallons of water, but not more than 400 gallons of water, per square foot per minute of the frontal area of the threshold member, and the volumes of water entering and leaving any particular length of the roll are substantially the same.
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13. A sediment roll according to claim 1 which, when subjected at 70°
- F. to a test in which a weight of 200 lbs. is applied uniformly to a 1 foot long section of the top of the roll for 20 seconds, and is then removed, the height of the roll, in the section underneath the weight, decreases by at least 60% before the weight is removed, and recovers to at least at least 75% of its original height within one hour of the weight being removed.
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14. A sediment control assembly which comprises a plurality of sediment control rolls as defined in claim 1.
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15. A sediment control assembly according to claim 14, wherein the sediment control rolls are joined together end-to-end.
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16. A sediment control assembly according to claim 14 wherein the sediment control are joined together side-by-side.
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17. A method of reducing sediment runoff from a construction site, the method rising placing a plurality of sediment control rolls as defined in claim 1 around the construction site.
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18. A sediment control roll which comprisesan elongate threshold member which is composed of two overlapping layers of polymeric netting;
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2) an elongate outflow member which is composed of two overlapping layers of polymeric netting;
3) a location member which extends from the outflow member;
the threshold member, the outflow member and the location member being different parts of a single piece of melt-extruded polymeric netting composed of a plurality of polymeric strands which (a) define a plurality of substantially identical apertures, each of which has an area of 0.03 to 0.16 in2; and
(b) have a solid surface area which is from 25 to 65% of the total area of the netting; and
4) an elongate outflow filter which (i) is secured between the overlapping layers of the outflow member and (ii) has a mesh size of 80 to 500 micron;
the sediment control roll comprising a hollow, elongate sediment collection chamber which (i) lies between the threshold member and the outflow member and (ii) has an unobstructed volume which is at least 80% of the total volume of the sediment control roll. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26)
has a weight after the test which is not more than 1.1 times, its weight before the test.
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25. A sediment roll according to claim 18 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 100 gallons of water, but not more than 400 gallons of water, per square foot per minute of the frontal area of the threshold member, and the volumes of water entering and leaving any particular length of the roll are substantially the same.
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26. A sediment roll according to claim 18 which, when subjected at 70°
- F. to a test in which a weight of 200 lbs. is applied uniformly to a 1 foot long section of the top of the roll for 20 seconds, and is then removed, the height of the roll, in the section underneath the weight, decreases by at least 60% before the weight is removed, and recovers to at least at least 75% of its original height within one hour of the weight being removed.
Specification