Convoluted plural layer filter assembly
US4479874A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 23, 1982 |
| Grant date | Oct 30, 1984 |
| Priority date | — |
| Expiry date | Sep 23, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D35/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A filter assembly is provided comprising a housing; a fluid inlet and a fluid outlet in the housing, each opening into a fluid chamber; and, disposed in the fluid chamber across the line of fluid flow from the inlet to the outlet so that all flow from the fluid inlet to the fluid outlet must pass therethrough, a filter element composite comprising a filter sheet material sandwiched between layers of foraminous spacer sheet material. The filter element composite has an upstream side and a downstream side and separates the chamber into a first portion on one side of the filter element composite communicating with the fluid inlet, and a second portion on the other side of the filter element composite communicating with the fluid outlet. The filter element composite is folded on itself in at least a double layer defining therebetween an open interior space in fluid communication with one of the first and second portions of the fluid chamber, the outer side of the filter element composite being in fluid communication with the other of the first and second portions of the fluid chamber; and the double layer filter element composite is arranged in a plurality of convolutions extending tra…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.