Water purification apparatus
US4842724A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 3, 1988 |
| Grant date | Jun 27, 1989 |
| Priority date | — |
| Expiry date | Aug 3, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2209/05
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Self-standing apparatus for filtering supply water to provide purified water includes a base subassembly and two container subassemblies. One container subassembly provides supply water to filtering apparatus located in the base subassembly. The second container holds purified water which passes through a semipermeable membrane filter in the base subassembly. Concentrate from the membrane filter flows back to the supply water container for ultimate recirculation. The base subassembly and the container subassemblies have automatically closing valves which render each container water-tight when separated from the base subassembly, and which open to provide communication between the containers and filtering apparatus within the base subassembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.