An apparatus and method for providing a water impenetrable barrier between an underground duct and an access opening. The apparatus is particularly well suited to cover a secondary opening in a containment sump of an underground storage tank or the manway of a sanitary sewer, catch basin or other ma
An apparatus and method for providing a water impenetrable barrier between an underground duct and an access opening. The apparatus is particularly well suited to cover a secondary opening in a containment sump of an underground storage tank or the manway of a sanitary sewer, catch basin or other manhole system. The apparatus includes a lid, inflatable seal and pressurized tank contained within the lid to inflate the seal. When sealed to the access opening, the lid restricts the inflow of water or other debris into the interior of the underground duct and restricts removal of the lid.
대표청구항▼
1. A secondary lid that restricts inflow of fluids into an interior of a containment sump of an underground storage tank, said containment sump having a secondary access opening having a concentric outer rim, an inner ledge and an annular sleeve extending upward between said outer rim and said inner
1. A secondary lid that restricts inflow of fluids into an interior of a containment sump of an underground storage tank, said containment sump having a secondary access opening having a concentric outer rim, an inner ledge and an annular sleeve extending upward between said outer rim and said inner ledge, said secondary lid comprising: concentric top and bottom plates and an annular collar extending between the top and bottom plates, wherein an outer edge of the bottom plate contacts the ledge of said secondary access opening of said containment sump;first and second spaced apart flanges extending outwardly from said collar approximately parallel with respect to each other;an expandable pneumatic seal positioned between said first and second spaced apart flanges, wherein when the seal is expanded the seal is in sealing contact with both said flanges, said annular collar of said lid, and said annular sleeve of said secondary access opening of said containment sump;a pressurized tank contained between said top and bottom plates and coupled in fluid communication with said pneumatic seal; anda flow regulator coupled in line between said pressurized tank and said pneumatic seal to control the air delivered to the pneumatic seal. 2. The secondary lid as recited in claim 1 further including an inflation control in fluid communication with said pressurized tank and said pneumatic seal to control flow of air into said pneumatic seal. 3. The secondary lid as recited in claim 2, wherein at least a portion of said inflation control is positioned on an exterior of said top plate. 4. The secondary lid as recited in claim 1 further including a discharge control in fluid communication with said pressurized tank and said pneumatic seal to control flow of air out of said pneumatic seal. 5. The secondary lid as recited in claim 4, wherein at least a portion of said discharge control is positioned on an exterior of said top plate. 6. The secondary lid as recited in claim 1, wherein said bottom plate is removable from said annular collar. 7. The secondary lid as recited in claim 1, wherein said pneumatic seal is constructed from a relatively pliable material and wherein said top plate, bottom plate, and annular collar are constructed of a relatively rigid material. 8. A device for restricting water penetration through an upper portion of a secondary access port of an underground duct, said device comprising: a cylindrical lid having a concentric opening extending from a bottom of said lid into a central portion of said lid;an inflatable seal contained about an outer side of said cylindrical lid; andwherein the bottom of said lid being adaptable to engage a recessed ledge of an access port, and further wherein said seal is adapted to engage an inner side surface of the access port and said outer side of said cylindrical lid to thereby create a water tight barrier above said recessed ledge restricting water from penetrating into an interior of the underground duct. 9. The device as recited in claim 8, further including first and second spaced apart flanges extending in parallel and outwardly from an outer cylindrical sidewall of said lid, wherein said inflatable seal is contained between said flanges. 10. The device as recited in claim 8, further including a pressurized tank and flow regulator contained within the central portion of said cylindrical lid, wherein said flow regulator is coupled in fluid communication between said pressurized tank and said inflatable seal to control the fluid delivered to the inflatable seal, and further wherein said tank and flow regulator are accessible from said opening of said cylindrical lid. 11. The device as recited in claim 8 further including an inflation valve control in fluid communication with said pressurized tank and said inflatable seal to control flow of air into said inflatable seal, wherein at least a portion of said inflation valve control is positioned on an exterior of said cylindrical lid. 12. The device as recited in claim 8 further including a discharge valve control in fluid communication with said pressurized tank and said inflatable seal to control flow of air out of said inflatable seal, wherein at least a portion of said discharge valve control is positioned on an exterior of said top plate. 13. The device as recited in claim 8, wherein said cylindrical lid is adapted to engage a containment sump secondary access opening having a concentric outer rim and inner ledge and an annular sleeve extending upward between said outer rim and said inner ledge, such that said inflatable seal engages an inner surface of said sleeve when said lid engages said inner ledge of said access opening. 14. The device as recited in claim 8, further including a removable bottom plate aligned in said opening and adapted to enclose the central portion on said lid. 15. A secondary lid that restricts inflow of water through an upper portion of a secondary access port of an underground duct, said secondary lid comprising: concentric top and bottom plates and an annular collar extending between the top and bottom plates;first and second spaced apart flanges extending outwardly from said collar;an expandable pneumatic seal positioned between said first and second spaced apart flanges;a removeable pressurized tank contained between said top and bottom plates and coupled in fluid communication with said pneumatic seal;a flow regulator coupled in line between said pressurized tank and said pneumatic seal to control the air delivered to the pneumatic seal;an inflation valve control in fluid communication with said pressurized tank and said pneumatic seal to control flow of air into said pneumatic seal; anda discharge valve control in fluid communication with said pressurized tank and said pneumatic seal to control flow of air out of said pneumatic seal; andwherein said secondary lid is adapted to engage a containment sump secondary access opening having a concentric outer rim and inner ledge and an annular sleeve extending upward between said outer rim and said inner ledge, such that said pneumatic seal engages an inner surface of said sleeve, inner sides of said first and second spaced apart flanges, and said collar when a bottom of said secondary lid engages said inner ledge of said access opening. 16. The secondary lid as recited in claim 15, wherein at least a portion of said inflation valve control is positioned on an exterior of said top plate. 17. The secondary lid as recited in claim 15, wherein at least a portion of said discharge valve control is positioned on an exterior of said top plate. 18. The secondary lid as recited in claim 15, further including a pressure gauge coupled in line between said regulator and said pneumatic seal, at least a portion of said pressure gauge positioned on an exterior of said plate.
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이 특허에 인용된 특허 (24)
Bambacigno Ralph (Modesto CA), Combination manway cover and emergency pressure relief apparatus.
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