发明名称 |
Plastic septic tank having layered composite wall |
摘要 |
A septic tank or storage tank has a corrugated thermoplastic wall which has a composite layered structure. A tank wall comprises an inner layer of solid plastic for containing liquid; an outer layer made of solid plastic, for resisting external mechanical forces, and a middle layer of closed cell foam plastic for both resisting liquid flow which penetrates the inner or outer layer and for heat retention which encourages biological processes. In an embodiment, the middle layer has less than about 55 percent of the density of the inner and outer layers, and the inner layer is substantially thinner than the outer layer. The three layers are integrally attached at the time of formation of the tank by rotational molding. The tank has good resistance to mechanical forces and provides insulation. |
申请公布号 |
US8151999(B1) |
申请公布日期 |
2012.04.10 |
申请号 |
US20090455774 |
申请日期 |
2009.06.05 |
申请人 |
MOORE, JR. ROY E.;KURT KRUGER;HARDESTY DOUGLAS;INFILTRATOR SYSTEMS, INC. |
发明人 |
MOORE, JR. ROY E.;KURT KRUGER;HARDESTY DOUGLAS |
分类号 |
B01D12/00 |
主分类号 |
B01D12/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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