Filter element for liquid straining filter
US4310419A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 29, 1981 |
| Grant date | Jan 12, 1982 |
| Priority date | — |
| Expiry date | Jan 29, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D25/24
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A filter element for straining liquid formed of a filter material in a convoluted form including two portions, one portion being a planar portion and the other portion being a corrugated portion having a plurality of elevated areas. The filter material is foled in half in the longitudinal center and wound in convolutions so that a series of letters V are formed on a transverse cross-sectional surface thereof. The pitch of the elevated areas is smaller in the central portion of the convoluted filter element corresponding to the end of the filter material at which winding is started and larger in the outer peripheral portion thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.