Vacuum filter assembly
US5141639A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 19, 1991 |
| Grant date | Aug 25, 1992 |
| Priority date | — |
| Expiry date | Jul 19, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D61/18
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A vacuum filter assembly for filtering a feed liquid includes a filter membrane held in a cover attachable to the filtrate container. The cover is formed with a feed liquid nipple on one side of the filter membrane, a filtrate outlet tube on the other side of the filter body, and a vacuum port. A portion of the surface of the membrane is non-wettable by the feed liquid to facilitate restarting the filtration if the filtration is interrupted. Also, the vacuum port includes a vacuum tube covered at its end by another membrane having pores permeable by air but not by the feed liquid, for fixing the maximum level of the filtrate within the filtrate container.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.