Filter apparatus including filter cartridges and an inpermeable film bag
US5364528A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 11, 1993 |
| Grant date | Nov 15, 1994 |
| Priority date | — |
| Expiry date | Feb 11, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2201/307
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A filter apparatus is described, in which there are in the interior of a filter housing (7) a multiplicity of filter elements (1) which are suspended on the filter cover (3) and in which the inner bores of the filter cartridges are connected to the outlet nozzle (6) via a system of channels. Against the wall of the filter housing (7) there bears a film bag (2), the upper end of which is welded to an O-ring (4), which is seated in an annular groove on the flange of the filter housing, with the diameters of O-ring and film bag being identical. Furthermore, volume displacers (16, 17, 25), which extend in the axial direction over the entire length of the filter housing, are provided between filter bag (2) and inner wall of the filter housing as well as in the inner space of the filter cartridges. When a filter is changed, these volume displacers are, for example, inflated with compressed air, as a result of which the volume of residual filtrate is considerably reduced, so that less loss of dispersion occurs. The arrangement described permits an easy filter change and offers advantages in the disposal of the residues (2).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.