Filters and Filtration Systems

Abstract

A filter assembly includes a sleeve, a filter, and a retention member. The sleeve is sized and configured to retain the filter, which is configured to facilitate the flow of air through and upstream side and a downstream side thereof. The filter includes at least one sidewall which extends from the upstream side to the downstream side and includes filter media. The filter further includes a back wall disposed at the downstream side of the main filter which also includes filter media. A back wall aperture is defined between the back wall and the sleeve. The retention member is positioned through the filter media adjacent the back wall, and is configured to define an aperture between an edge of the back wall and the sleeve. The aperture facilitates the flow of air therethrough.

Dependencies are inferred from the claim text.