Water conditioning apparatus
US4911840A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 30, 1988 |
| Grant date | Mar 27, 1990 |
| Priority date | — |
| Expiry date | Nov 30, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D63/10
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A portable water treatment apparatus utilizing a cylindrical filter module having a spirally wound semipermeable membrane assembly includes interior upper and lower O-ring seals and an outer brine seal, all of which may be assembled without any potentially damaging movement between the seals and the respective interfacing surfaces in contact with the seals. Each of the O-ring seals is disposed between an annular shoulder on one interfacing part and a frustoconical surface on the other part such that a sealing compression is the only movement imposed on the O-ring. The brine seal, comprising a strip of adhesive-coated tape, is attached after the filter module has been placed in the housing such that it is in its final sealing position and is undisturbed by any subsequent assembly step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.