Fluid filter system
US3959141A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 8, 1974 |
| Grant date | May 25, 1976 |
| Priority date | — |
| Expiry date | May 8, 1994 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D35/027
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A filter assembly for trapping particulate contaminants in a flow of fluid includes a porous cylindrical filter element, a cylindrical screen and a by-pass valve for preventing flow blockage in the event the filter should become clogged. These components are arranged in a configuration which avoids difficulties encountered with prior systems by situating the screen downstream from both the filter element and the by-pass valve and in a separate compartment from the filter. Fluid which may be diverted from passage through the filter by the by-pass valve continues to pass through the screen so that relatively large contaminants continue to be entrapped but the diverted fluid does not pass by the contaminated surface of the clogged filter and thereby pick up previously trapped matter. Either the filter or the screen may be replaced, cleaned, or otherwise serviced without disturbing the other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.