Filter with main and supplemental filter elements and optional bubble breaker
US8652327B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 14, 2010 |
| Grant date | Feb 18, 2014 |
| Priority date | — |
| Expiry date | Nov 3, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2275/208
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A fluid filter providing several degrees of filtering is designed to be receivable in a filter container that is closable by a cover. The filter itself includes both an annular main filter element, through which fluid to be filtered can pass radially to undergo primary filtration, and a supplemental filter element, to which fluid discharged from the main filter element passes to provide supplemental filtration additional to the primary filtration. The main filter element, the supplemental filter element, or both may be oblong or circular in cross section. At least one of a pair of end caps disposed on opposed ends of the main filter element carries the supplemental filter element as well as one end of the main filter element. That end cap may or may not be permanently secured to the one filter element end.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.