Double-rack grating for use in wastewater
US4921599A · kind A · utility
5Cited by
7References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 6, 1988 |
| Grant date | May 1, 1990 |
| Priority date | — |
| Expiry date | May 6, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2201/184
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A double screen or double-rack grate for use in the extra-fine screening of waste waters includes two rows of rods in laterally staggered arrangements with one row positioned behind the other in the direction of flow of waste water to be screened. Each rod of one row has a hydrodynamic cross section defined by a thickened head portion. Such row of rods is positioned downstream of a first row of rods including rods with substantially rotationally symmetrical cross sections.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.