Portable water-purifying devices
US5308482A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 18, 1990 |
| Grant date | May 3, 1994 |
| Priority date | — |
| Expiry date | Oct 18, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A20/208
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A portable water-purifying device comprises a primary disinfecting chamber (50) and a combined secondary disinfecting chamber and post-filter (30). Water to be purified can be scooped by means of a cover (12) into a receptacle (90) containing a pre-filter media (39) of preferably silvered activated carbon beneath a coarse entry filter pad (102). From that receptacle (90) the water enters the primary disinfecting chamber (50), flowing downwards through nine or so passage-forming segments (22) filled with a microbiocide (56), to effect primary disinfection, that is, to kill a substantial number of pathogenic organisms, but probably not all. Each passage (22) is at least three times longer than it is wide, to prevent channelling of the water through the microbiocide. Disinfectant from the microbiocide (56) enters the water as it passes through. The disinfectant-containing water from the primary disinfecting chamber (50) enters the combined secondary disinfecting chamber and post-filler (30)--"second chamber (30)"--down a center tube (44) to be stored for, say, two minutes or so for any remaining viruses, as well as any other remaining pathogenic organisms, to be killed. The second cha…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.