Filter cartridges for liquid, and to filters fitted with such cartridges
US5413712A · kind A · utility
44Cited by
4References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 23, 1993 |
| Grant date | May 9, 1995 |
| Priority date | — |
| Expiry date | Jul 23, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2201/34
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A filter cartridge for a liquid is designed to be removably received in a housing and comprises a tubular filter element of zig-zag folded paper having two ends that are secured to two respective flexible washers. The cartridge does not have any central reinforcement of its own and its washers co-operate directly for sealing purposes with appropriate annular bearing surfaces of a perforated rigid tube that is included in the housing: the cartridge is therefore easily discarded or degraded after use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.