Equipment for cleaning waste water
US5556537A · kind A · utility
9Cited by
5References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 3, 1992 |
| Grant date | Sep 17, 1996 |
| Priority date | — |
| Expiry date | Dec 3, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F1/5281
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A wastewater tank intended for use in a small sewage treatment plant. A spiral pipe is coiled around the exterior casing of the tank and is structurally secured to that casing, so that the pipe imparts structural stiffness to the tank. For example, the casing and pipe may be of a thermoplastic material and are thermoplastically welded together so that the pipe is structurally attached to the casing. Wastewater passes in turn through the multiple treatment spaces in the tank, to undergo pre-sedimentation, flocculation, and clarification.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.