Patent ID: 8313545
Filing Date: 2012-11-20
Classification: B01D,B25C,B25F

Abstract:
1. A filter assembly for a combustion tool comprising: a housing defining a filter chamber and having a closed end and an opposite open end; at least one air stack disposed in said open end and having a base with a base end and defining at least one conduit with an inlet end opposite said base end, said inlet end being in fluid communication with said filter chamber; said at least one conduit is in fluid communication with the tool so that filtered air may flow freely from said at least one air stack into the tool; at least one filter element located in said housing between said base and said inlet end, said at least one filter element including a top surface and a bottom surface; said housing having at least one air intake slit positioned adjacent to said at least one filter element and configured such that air entering said slit is forced to pass through said at least one filter element before entering said inlet end; and at least one standoff wall enclosed by said housing and extending between said bottom surface of said at least one filter element and said closed end of said housing, said at least one standoff wall defining a space extending from said bottom surface of said at least one filter element to said inlet end for air to flow substantially through said at least one filter element, contact an inner surface of said closed end, and change direction to flow through said inlet end and into said at least one conduit.