Patent ID: 7828867

Claim:
A portable air treatment device comprising: a blower; a housing maintaining the blower and forming a filter chamber that is fluidly open to the blower, the filter chamber generally defined by an access end and a back end opposite the access end, wherein the filter chamber has height, width and depth dimensions and is sized to selectively receive a filter assembly and is defined at least in part by: framework extending from the access end to the back end to establish a maximum height and maximum width of the filter chamber, the framework including opposing, first and second sides each having a length defining one of the height and the width, a flange projecting inwardly relative to the framework at the back end, the flange providing a filter receiving surface and establishing a maximum depth of the filter chamber as a distance between the flange and the access end; and a filter retaining mechanism for capturing a filter assembly within the filter chamber, the filter retaining mechanism including: a rigid, non-moveable first body spaced from the back end and extending inwardly from the first side in one of the height and width dimensions to a terminal edge, wherein the terminal edge has a length in a direction of the first side length that is less than the first side length, and further wherein the terminal edge combines with the framework to create a chamber access opening having an effective height and effective width, and even further wherein the terminal edge combines with the flange to establish an effective depth that is less than the maximum depth of the filter chamber such that a filter assembly can be captured between the first body and the flange, a non-moveable first bearing surface protruding inwardly from the second side opposite the terminal edge and positioned a distance from the back end, wherein the bearing surface defines a length in a direction of the second side length, the bearing surface length being less than the second side length.