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| Number | Title | Issue Date |
| 7419331 | Leaching chamber with varying slot opening height A continuous curve arch shape cross section leaching chamber made of molded thermoplastic has closely spaced corrugations and sidewalls, portions of which are perforated with horizontal slots. Either or both of the slot height and the local wall thickness which defi... | 09/02/2008 |
| 7396188 | Leaching chamber having varying slotted wall thickness A continuous curve arch shape cross section leaching chamber made of molded thermoplastic has closely spaced corrugations and sidewalls, portions of which are perforated with horizontal slots. Either or both of the slot height and the local wall thickness which defi... | 07/08/2008 |
| 7364384 | Anti-rotation stop for chamber A thermoplastic chamber for leaching wastewater or other use, which is designed so that when jointed to a like chamber the horizontal plane angle between the chambers can be adjusted, has one or more stops which can be selectively used to prevent rotation, for insta... | 04/29/2008 |
| 7351006 | Leaching chambers joined together with swivel connections Arch shape cross-section leaching and stormwater chambers are connected together so that swiveled angling is obtained at the joint. Angling is accomplished by means of an integral or detachable dome end comprising a conical section. A like chamber with an ordinary e... | 04/01/2008 |
| 7311467 | Ergonomic size leaching chamber A leaching chamber, particularly a chamber which lacks ribs and is therefore flexible along its length, has a length in the range 4 to 5 ft, a length to width aspect ratio of between 1.2 and 1.6 and a weight of less than 3 pounds per foot, preferably about 12 pounds... | 12/25/2007 |
| 7306399 | Stormwater chamber with changing corrugation width angle An arch shape cross section molded plastic stormwater chamber, which has a multiplicity of corrugations, can be nested within another like chamber for shipment. The width and included angle between the opposing sides of each corrugation both decrease with elevation ... | 12/11/2007 |
| 7306400 | Leaching chamber having dosing pipe hanger A molded plastic corrugated arch shape cross section leaching chamber, which is adapted for connection to a like chamber with a pivotable connection, has a hanger for a dosing pipe which is contained within the concavity of a peak corrugation of the end of a mating ... | 12/11/2007 |
| 7273330 | Invert elevation-change adapter An adapter is used with a leaching chamber or like article to change the invert elevation for a pipe which carries water to the article. The first end of the adapter fits a hole or other port on the article. The body of the adapter rotates about that first end, chan... | 09/25/2007 |
| 7217063 | Latch for leaching chamber Two identical arch shape cross section chambers are joined together so that a dome shape part of one end of the chamber is overlapped by the opposing plain end of the second chamber. Thus, one chamber may pivot in the horizontal plane, for adjustment during installa... | 05/15/2007 |
| 7207747 | Drainage system for sand bunker Rain water is drained from a golf course sand bunker or like structure by a drainage system which comprises a conduit having a solid top and perforations in the sidewall. A conduit which is a chamber having an arch shape cross section is contained within a sand fill... | 04/24/2007 |
| 7189027 | Corrugated leaching chamber A continuous curve arch shape cross section leaching chamber made of molded thermoplastic has closely spaced corrugations and sidewalls which are perforated with slots which slope downwardly, running from interior to exterior of the chamber. The slot height and or w... | 03/13/2007 |
| 4759661 | Leaching system conduit A thermoplastic device for leaching sewage system effluent into the earth has the shape of an inverted trough. Its sidewalls have slot shaped perforations; above each slot is a lip; beneath each slot is one or more protuberances, preferably rectanguloid i... | 07/26/1988 |
