Spacerless feed channel membrane filter element
US4944877A · kind A · utility
43Cited by
2References
12Claims
0Family size
Inventor
Key dates
| Filing date | Oct 10, 1989 |
| Grant date | Jul 31, 1990 |
| Priority date | — |
| Expiry date | Oct 10, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D63/101
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A reverse osmosis filtration device which comprises a flexible elongated membrane bladder spirally wrapped around a purified water duct in a series of spaced-apart coils supported about their edges by perforated spacers. The device is installed in a water supply conduit to extract a volume of purified water under typical household line pressure while allowing the brine-carrying feed water for other normal household usage such as clothes and dishwashing, toilet flushing, showering and bathing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.