Water purifier comprising stages mounted side-by-side to unitary header
US4713175A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 5, 1986 |
| Grant date | Dec 15, 1987 |
| Priority date | — |
| Expiry date | Aug 5, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2201/006
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A water purification system having a first pressure vessel containing a reverse-osmosis filter and a second separate pressure vessel containing an activated carbon prefilter operatively connected in series and upstream of the first pressure vessel by means of a common header. The activated carbon prefilter includes a particulate trap upstream of the activated carbon to trap sediment carried in the unpurified water. The particulate trap is compressible under operational water pressures attained in the system when the trap becomes clogged with sediment, which serves to crack or break away from the surface thereof particle accumulations clogging the trap, permitting flow to continue through the trap into the activated carbon and, subsequently, through the reverse-osmosis filter element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.