Filter with multi-purpose end cap
US6638332B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 2001 |
| Grant date | Oct 28, 2003 |
| Priority date | — |
| Expiry date | Oct 31, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2271/022
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A filter (10), including an inside-out reverse flow air filter, has an annular filter element (20) with an upper end cap (24) provided by a resiliently compressible trifunctional member having: (a) a wall (50) deflecting debris radially outwardly within the housing away from the central opening (26) of the hollow filter interior (22); (b) an air entrance guide throat (52) directing air to the central opening (26) with reduced restriction; and (c) a sealing surface (54) sealed to the housing and blocking air flow from the inlet (28) to the outlet (34) otherwise bypassing the filter element. In further embodiments, simplified and cost reduced sealing is provided by a configured end cap.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.