Honeycomb filter and method of making it
US4417908A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 22, 1982 |
| Grant date | Nov 29, 1983 |
| Priority date | — |
| Expiry date | Feb 22, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24149
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The filter of honeycomb construction has a matrix of thin, interconnected walls which define a multiplicity of cells and which have interconnected open porosity of a volume and size sufficient to enable the fluid to flow completely across the thin walls in their narrow dimensions between adjoining cells and through the thin walls in their longer dimensions between adjoining or neighboring cells and to restrict the particulates in the fluid from flowing either completely across or through any of the thin walls, and has the cells divided into an inlet group and an outlet group and providing the inlet group of cells with substantially greater desirably about 25% or more greater, collective thin wall surface area than is provided to the outlet group of cells. Portions of the inlet group cells adjoin one another and share in common the same thin wall. Method of fabricating the filter comprises providing the matrix, and closing oen end of each of the inlet and outlet group cells, the closed ends of the inlet group cells being at an end face of the matrix opposite to the other end face thereof at which occur the closed ends of the outlet group cells, to provide the inlet group of cells wi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.