Air filter assembly
US6726738B1 · kind B1 · utility
Inventor
Key dates
| Filing date | Oct 4, 2002 |
| Grant date | Apr 27, 2004 |
| Priority date | — |
| Expiry date | Oct 4, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2279/60
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Air filter assemblies include an air filter housing with an air flow passageway extending therethrough, and a connection flange to facilitate attachment with an air filter member. The air filter member includes an annular air filter element disposed concentrically around the housing. The filter member has a closed top at one end and a retaining band at an opposite end that includes a connection base that is configured to attach with the housing connection flange. An attachment assembly is positioned over the housing connection flange and air filter member connection base to releasibly attach the air filter member to the air filter housing. An O-ring seal is interposed between the air filter housing and member to provide a leak-tight fit therebetween. A sound attenuating chamber is disposed within the assembly to control unwanted intake air noise therein. A vacuum monitor can be attached to the assembly to assess the remaining service life of the air filter element without need for visual inspection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.