A plastic arch-shape cross section corrugated stormwater chamber has a multiplicity of crest corrugations and valley corrugations which run transverse to its length. Sub-corrugations run along part or all of the arch-curve lengths of either crest corrugations or valley corrugations, or along both of
A plastic arch-shape cross section corrugated stormwater chamber has a multiplicity of crest corrugations and valley corrugations which run transverse to its length. Sub-corrugations run along part or all of the arch-curve lengths of either crest corrugations or valley corrugations, or along both of them. A sub-corrugations are smaller in dimension than an associated crest corrugation or valley corrugation. Sub-corrugations may taper in width and depth and may taper to nothingness. A compound convex shape end cap, useful for closing off the ends of stormwater chambers, has substantially vertical corrugations with analogous sub-corrugations.
대표청구항▼
1. A chamber for drainage, comprising: opposing side bases;sidewalls extending from the opposing side bases;a plurality of crest corrugations and a plurality of valley corrugations positioned along a length of the chamber; anda plurality of valley sub-corrugations, wherein at least one valley sub-co
1. A chamber for drainage, comprising: opposing side bases;sidewalls extending from the opposing side bases;a plurality of crest corrugations and a plurality of valley corrugations positioned along a length of the chamber; anda plurality of valley sub-corrugations, wherein at least one valley sub-corrugation runs downwardly along a valley corrugation toward the opposing side bases, wherein the at least one valley sub-corrugation includes terminal ends at an elevation above the opposing side bases, wherein a height of the at least one valley sub-corrugation decreases towards each of the terminal ends of the at least one valley sub-corrugation. 2. The chamber of claim 1, wherein the at least one valley sub-corrugation runs along a portion of the valley corrugation. 3. The chamber of claim 1, wherein a height of the at least one valley sub-corrugation is less than a depth of the valley corrugation along which the at least one valley sub-corrugation runs. 4. The chamber of claim 1, wherein a width of the at least one valley sub-corrugation decreases towards each of the terminal ends of the at least one valley sub-corrugation. 5. The chamber of claim 1, wherein a maximum width of the at least one valley sub-corrugation is no more than one-third of a width of the valley corrugation along which the at least one valley sub-corrugation runs. 6. The chamber of claim 1, wherein the valley corrugations increase in width with elevation from the opposing side bases. 7. The chamber of claim 1, the crest corrugations decrease in width with elevation from the opposing side bases. 8. A chamber for drainage, comprising: opposing side bases;sidewalls extending from the opposing side bases;a plurality of crest corrugations and a plurality of valley corrugations positioned along a length of the chamber, wherein each valley corrugation includes a first terminal end and a second terminal end; anda plurality of valley sub-corrugations, wherein at least one valley sub-corrugation runs downwardly along a valley corrugation toward the opposing side bases, wherein the at least one valley sub-corrugation includes a first terminal end and a second terminal end, wherein the first terminal end of the at least one valley sub-corrugation is positioned at an elevation above the first terminal end of valley corrugation, wherein the second terminal end of the at least one valley sub-corrugation is positioned at an elevation above the second terminal end of valley corrugation, wherein a height of the at least one valley sub-corrugation decreases towards each of the terminal ends of the at least one valley sub-corrugation. 9. The chamber of claim 8, wherein the at least one valley sub-corrugation runs along a portion of the valley corrugation. 10. The chamber of claim 8, wherein a height of the at least one valley sub-corrugation is less than a depth of the valley corrugation along which the at least one valley sub-corrugation runs. 11. The chamber of claim 8, wherein a width of the at least one valley sub-corrugation decreases towards each of the first terminal end and the second terminal end of the at least one valley sub-corrugation. 12. The chamber of claim 8, wherein a maximum width of the at least one valley sub-corrugation is no more than one-third of a width of the valley corrugation along which the at least one valley sub-corrugation runs. 13. The chamber of claim 8, wherein the valley corrugations increase in width with elevation from the opposing side bases. 14. The chamber of claim 8, the crest corrugations decrease in width with elevation from the opposing side bases. 15. A chamber for drainage, comprising: a first side base;a second side base;sidewalls extending from the first and second side bases;a plurality of crest corrugations and a plurality of valley corrugations positioned along a length of the chamber, wherein each valley corrugation includes a first end at the first side base and a second end at the second side base; anda plurality of valley sub-corrugations, wherein at least one valley sub-corrugation runs downwardly along a portion of a valley corrugation toward the first and second side bases, wherein the at least one valley sub-corrugation includes a first terminal end between the first end and the second end of the valley corrugation and includes a second terminal end between the first end and the second end of the valley corrugation, wherein a height of the at least one valley sub-corrugation decreases towards each of the first terminal end and the second terminal, end of the at least one valley sub-corrugation. 16. The chamber of claim 15, wherein a height of the at least one valley sub-corrugation is less than a depth of the valley corrugation along which the at least one valley sub-corrugation runs. 17. The chamber of claim 15, wherein a width of the at least one valley sub-corrugation decreases towards each of the first terminal end and the second terminal end of the at least one valley sub-corrugation. 18. The chamber of claim 15, wherein a maximum width of the at least one valley sub-corrugation is no more than one-third of a width of the valley corrugation along which the at least one valley sub-corrugation runs. 19. The chamber of claim 15, wherein the valley corrugations increase in width with elevation from the first and second side bases. 20. The chamber of claim 15, the crest corrugations decrease in width with elevation from the first and second side bases.
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