Reverse osmosis filter cartridge assembly
US4992170A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 3, 1990 |
| Grant date | Feb 12, 1991 |
| Priority date | — |
| Expiry date | Apr 3, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D65/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A three element reverse osmosis filter cartridge assembly has a pre-filter section for solid particles, a reverse osmosis membrane filter section which produces product water and waste water from feed water circulated thereto via the pre-filter section, and a post-filter section for filtering the product water. These sections are disposed in coaxial, concentric relationship. The pre-filter section forms a replaceable outside sheath which is slideable onto and off the membrane section. The post-filter section is a tubular body containing carbon or other particles which is removably disposed in a central opening inside the membrane section. The membrane section has a support ring defining one end of the cartridge assembly which is disposed in sealing relationship with a ring which holds filter media layers of the pre-filter section. The pre-filter section has another ring at the end thereof opposite to said first ring and defines the opposite end of said pre-filter section. The cartridge assembly is replaceably disposed in a tubular housing having an end plate at one end thereof and a removable end cap at the opposite end thereof. The end plate has openings or ports for communicating…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.